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<!--Weave of 'Spatial Map' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inter Modules</a></li><li><a href="index.html">index</a></li><li><a href="index.html#4">Chapter 4: Spatial Mapping</a></li><li><b>Spatial Map</b></li></ul></div>
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<p class="purpose">To fit the map of the rooms in the game into a cubical grid, preserving distances and angles where possible, and so to give each room approximate coordinate locations.</p>
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<ul class="toc"><li><a href="4-sm.html#SP8">§8. Grand strategy</a></li><li><a href="4-sm.html#SP8_3">§8.3. Page directions</a></li><li><a href="4-sm.html#SP8_13">§8.13. Map reading</a></li><li><a href="4-sm.html#SP12">§12. Submap construction</a></li><li><a href="4-sm.html#SP8_21">§8.21. Partitioning to component submaps</a></li><li><a href="4-sm.html#SP8_23">§8.23. Movements of single rooms</a></li><li><a href="4-sm.html#SP8_24">§8.24. Synchronising movements of locked rooms</a></li><li><a href="4-sm.html#SP8_26">§8.26. Positioning within components</a></li><li><a href="4-sm.html#SP19">§19. Heat</a></li><li><a href="4-sm.html#SP24">§24. Subdividing our submap</a></li><li><a href="4-sm.html#SP25">§25. Finding how to divide</a></li><li><a href="4-sm.html#SP27">§27. Zones 1 and 2 for a single cut</a></li><li><a href="4-sm.html#SP29">§29. Zones 1 and 2 for a double cut</a></li><li><a href="4-sm.html#SP31">§31. Tactics</a></li><li><a href="4-sm.html#SP32">§32. The cooling tactic</a></li><li><a href="4-sm.html#SP35">§35. The quenching tactic</a></li><li><a href="4-sm.html#SP36">§36. The diffusion tactic</a></li><li><a href="4-sm.html#SP38">§38. The radiation tactic</a></li><li><a href="4-sm.html#SP8_28">§8.28. The explosion tactic</a></li><li><a href="4-sm.html#SP8_29">§8.29. Stage 3, positioning the components</a></li><li><a href="4-sm.html#SP8_31">§8.31. Stage 5, bounding the universe</a></li><li><a href="4-sm.html#SP8_32">§8.32. Stage 6, removing blank planes</a></li><li><a href="4-sm.html#SP45">§45. Unit testing</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>We assign \((x, y, z)\) coordinates to each room, aiming to make the
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descriptive map connections ("The Ballroom is east of the Old Kitchens")
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as plausible as possible in coordinate terms. To do this well feels like a
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research-level problem in graph theory or aesthetics, but we will just have
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to muddle through.
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</p>
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<p class="commentary">Those experimenting with this code may like to use "Include spatial map
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in the debugging layout", and the internal test cases with names in the form
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<span class="extract"><span class="extract-syntax">Index-MapLayout-*</span></span>.
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</p>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>We will partition the set of rooms into "components", which are disjoint
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nonempty collections of rooms joined together by proximity. Proximity comes
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about in two ways:
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</p>
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<ul class="items"><li>(i) Map connections in directions along lattice lines (EAST, UP, and so on
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but not INSIDE or OUTSIDE);
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</li><li>(ii) Locks placed between rooms by sentences intended to give this algorithm
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hints about layout.
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</li></ul>
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<p class="commentary">As we will see, we will map rooms using a symmetric form of relationships:
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if X relates to Y then Y relates to X. This will take some fixing, because
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map connections in Inform needn't be symmetrical.
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</p>
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<p class="commentary">We must then solve two different problems. The first is to place rooms at
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grid positions within each individual component. We assign each possible
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arrangement a numerical measure of its geometric distortion, and then try
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to minimise this, but of course any exhaustive search would be
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prohibitively slow. This problem is quite likely NP-complete, and it looks
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likely that we can embed notorious problems in complexity theory within it
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(say, the bandwidth minimization problem). We do have the advantage of
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experience about what IF maps look like, and of not having to deal well
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with bizarre maps, but still, we shouldn't expect to achieve a perfect
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choice. We must be very careful about running time; it's unacceptable for
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the Inform indexer to take longer to run than Inform itself. The code below
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is roughly quadratic in the number of rooms, which is a reasonable
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compromise given how few works of IF have really enormous room counts.
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</p>
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<p class="commentary">The second problem is to place the components onto a global grid so that
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they make sensible use of space on the index page, but don't get in each
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other's way.
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</p>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>A "connected submap" is a map formed from some subset of the rooms
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in the model world, together with any spatial relationships between them,
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such that it's possible to go from any X to any Y in the submap using only
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some sequence of these relationships.
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</p>
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<p class="commentary">Connected submaps will arise initially because we'll take every component
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of the map and make it into a connected submap; but then more will exist
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temporarily as we cut these up. Each room will, at any given time, belong
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to exactly one submap.
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</p>
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<p class="commentary">At any given point in our calculations each room has a grid location which
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is a triple of integers \((x, y, z)\). The position of the origin is
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undefined, and not relevant, since only the location of one room relative
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to another is important. We will cache the values of the corner points of
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the smallest cuboid \((x_0, y_0, z_0)\) to \((x_1, y_1, z_1)\) which contains
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all of the rooms in our submap. Similarly, we cache the penalty score for
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the current arrangement of rooms relative to each other within the submap
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as the "heat", a term to be explained later.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">first_room_in_submap</span><span class="plain-syntax">; </span><span class="comment-syntax"> double-headed linked list of rooms</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">last_room_in_submap</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">bounds</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax">; </span><span class="comment-syntax"> current penalty score for bad placement of rooms</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">positioned</span><span class="plain-syntax">; </span><span class="comment-syntax"> already placed within the global map grid?</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">incidence_cache</span><span class="plain-syntax">; </span><span class="comment-syntax"> how many of our rooms occupy each grid position?</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">incidence_cache_size</span><span class="plain-syntax">; </span><span class="comment-syntax"> how large that cache is</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">incidence_cache_bounds</span><span class="plain-syntax">; </span><span class="comment-syntax"> bounds of the incidence cache array</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">superpositions</span><span class="plain-syntax">; </span><span class="comment-syntax"> number of pairs of rooms which share the same grid location</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">for_session</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">discarded</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax">;</span>
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</pre>
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<ul class="endnotetexts"><li>The structure connected_submap is accessed in 2/ii, 2/sas and here.</li></ul>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>One special room is the "benchmark", from which the map is arranged.
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This is usually the room in which the player begins.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::benchmark_level</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::benchmark_level</span></span>:<br/><a href="4-sm.html#SP8_29_1_1">§8.29.1.1</a>, <a href="4-sm.html#SP8_29_1_2">§8.29.1.2</a>, <a href="4-sm.html#SP8_29_1_3">§8.29.1.3</a><br/>Faux Instances - <a href="2-fi.html#SP10_4">§10.4</a><br/>Render HTML Map - <a href="4-rhm.html#SP8">§8</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-fi.html#SP11" class="function-link"><span class="function-syntax">FauxInstances::benchmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><a href="2-fi.html#SP11" class="function-link"><span class="function-syntax">FauxInstances::benchmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">)).</span><span class="identifier-syntax">z</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b>We are going to be iterating through the set of rooms often. Looping over
|
|
all rooms can afford to be fairly slow, but it's essential in order to keep
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the running time down that we loop through submaps with overhead no worse
|
|
than the number of rooms in the submap; this is why we keep the linked list.
|
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</p>
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<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">first_room_in_submap</span><span class="plain-syntax">; </span><span class="identifier-syntax">R</span><span class="plain-syntax">; </span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">next_room_in_submap</span><span class="plain-syntax">)</span>
|
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</pre>
|
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<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. </b>These algorithms are trying to do something computationally expensive, so
|
|
it's useful to keep track of how much time they cost. The unit of currency
|
|
here is the "drogna"; 1 drogna is equivalent to a single map or lock lookup,
|
|
or a single exit heat calculation.
|
|
</p>
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<p class="commentary">Just as each submap has a bounding cuboid, so does the whole assemblage:
|
|
</p>
|
|
|
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<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">map_calculation_data</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">Universe</span><span class="plain-syntax">;</span>
|
|
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">spatial_coordinates_established</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">partitioned_into_components</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">drognas_spent</span><span class="plain-syntax">; </span><span class="comment-syntax"> in order to measure roughly how much work we're doing</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cutpoint_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">division_spending</span><span class="plain-syntax">;</span>
|
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">slide_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cooling_spending</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">quenching_spending</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">diffusion_spending</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">radiation_spending</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">explosion_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">} </span><span class="reserved-syntax">map_calculation_data</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>The structure map_calculation_data is accessed in 4/rhm, 4/rem and here.</li></ul>
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<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">map_calculation_data</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::fresh_data</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::fresh_data</span></span>:<br/>Indexing API - <a href="1-ia.html#SP5">§5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">map_calculation_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">Universe</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_coordinates_established</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">partitioned_into_components</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> in order to measure roughly how much work we're doing</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cutpoint_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">division_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">slide_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cooling_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">quenching_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">diffusion_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">radiation_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">explosion_spending</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">calc</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. Grand strategy. </b>Here is the six-stage strategy. I estimate that the running time is as
|
|
follows, where \(R\) is the number of rooms:
|
|
</p>
|
|
|
|
<ul class="items"><li>(1) Linear time, \(O(R)\), so essentially instant.
|
|
</li><li>(2) Linear time, \(O(R)\), so essentially instant.
|
|
</li><li>(3) About \(O(R^2\log R)\), at worst, but generally better in practical cases.
|
|
</li><li>(4) This could be as bad as \(O(R^2)\), but only in bizarre circumstances.
|
|
</li><li>(5) Linear time, \(O(R)\), so essentially instant.
|
|
</li><li>(6) In theory about \(O(R^{4/3})\), but in practice \(O(R)\).
|
|
</li></ul>
|
|
<p class="commentary">We allow this function to be called more than once only for the convenience of
|
|
the unit test below, which makes spatial positioning happen early in order
|
|
to get the results in time to write them in the story file.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::establish_spatial_coordinates</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::establish_spatial_coordinates</span></span>:<br/>Map Element - <a href="3-me.html#SP1">§1</a><br/>Render EPS Map - <a href="4-rem.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_coordinates_established</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14" class="named-paragraph-link"><span class="named-paragraph">(1) Create the spatial relationship arrays</span><span class="named-paragraph-number">8.14</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_21" class="named-paragraph-link"><span class="named-paragraph">(2) Partition the set of rooms into component submaps</span><span class="named-paragraph-number">8.21</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">partitioned_into_components</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_26" class="named-paragraph-link"><span class="named-paragraph">(3) Position the rooms within each component</span><span class="named-paragraph-number">8.26</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29" class="named-paragraph-link"><span class="named-paragraph">(4) Position the components in space</span><span class="named-paragraph-number">8.29</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_31" class="named-paragraph-link"><span class="named-paragraph">(5) Find the universal bounding cuboid</span><span class="named-paragraph-number">8.31</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_32" class="named-paragraph-link"><span class="named-paragraph">(6) Remove any blank lateral planes</span><span class="named-paragraph-number">8.32</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_31" class="named-paragraph-link"><span class="named-paragraph">(5) Find the universal bounding cuboid</span><span class="named-paragraph-number">8.31</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_coordinates_established</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_1" class="paragraph-anchor"></a><b>§8.1. </b>To make the code less cumbersome to read, all access to the position
|
|
will be using the following:
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">) </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">position</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::set_room_position</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::set_room_position</span></span>:<br/><a href="4-sm.html#SP8_23">§8.23</a>, <a href="4-sm.html#SP8_24">§8.24</a>, <a href="4-sm.html#SP31">§31</a>, <a href="4-sm.html#SP38_1">§38.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">O</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">position</span><span class="plain-syntax"> = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">) </span><a href="4-sm.html#SP16" class="function-link"><span class="function-syntax">SpatialMap::move_room_within_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">, </span><span class="identifier-syntax">O</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::set_room_position_breaking_cache</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::set_room_position_breaking_cache</span></span>:<br/><a href="4-sm.html#SP8_18">§8.18</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">position</span><span class="plain-syntax"> = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_2" class="paragraph-anchor"></a><b>§8.2. </b>Locking is a way to influence the algorithm in this section by forcing a
|
|
given exit to be locked in place, forbidding it to be distorted.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::lock_exit_in_place</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::lock_exit_in_place</span></span>:<br/>Faux Instances - <a href="2-fi.html#SP10_2">§10.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I2</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_2" class="function-link"><span class="function-syntax">SpatialMap::lock_one_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_2" class="function-link"><span class="function-syntax">SpatialMap::lock_one_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::lock_one_exit</span><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Mapping clue: put %S to the %s of %S\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">), </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">F</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">lock_exits</span><span class="plain-syntax">[</span><span class="identifier-syntax">exit</span><span class="plain-syntax">] = </span><span class="identifier-syntax">T</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_3" class="paragraph-anchor"></a><b>§8.3. Page directions. </b>These are any of the 12 standard IF directions (N, NE, NW, S, SE, SW, E, W,
|
|
U, D, IN, OUT), and are indexed with an number between 0 and 11 inclusive.
|
|
These are so called because they refer to directions on the page on which
|
|
the map will be plotted — the page direction 6 really means rightwards, not
|
|
east, but it's still convenient to think of them that way.
|
|
</p>
|
|
|
|
<p class="commentary">For most Inform projects, page directions correspond to directions in the
|
|
story file. But that needn't be true; some story files create exotic directions
|
|
like "port" and "starboard". So the following array gives the correspondence
|
|
of story directions to page directions; if the value is 12 or more, the direction
|
|
won't be shown on the index at all. The initial setup is for the 12 standard
|
|
story directions to correspond exactly to the 12 page directions.
|
|
</p>
|
|
|
|
<p class="commentary">If we want to show one of the exotic directions, we can use a sentence like:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>Index map with starboard mapped as east.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">When we read this, we associate direction object 13, say (the starboard
|
|
direction) with page direction 6:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::mapped_as_if</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::mapped_as_if</span></span>:<br/>Render HTML Map - <a href="4-rhm.html#SP7_1_4">§7.1.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="plain-syntax">-></span><span class="element-syntax">direction_index</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] == </span><span class="identifier-syntax">i</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">-></span><span class="element-syntax">direction_index</span><span class="plain-syntax"> == </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">])</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_4" class="paragraph-anchor"></a><b>§8.4. </b>This is therefore how we know whether a given story direction will actually
|
|
be visible on the map we draw:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::direction_is_mappable</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::direction_is_mappable</span></span>:<br/>Render HTML Map - <a href="4-rhm.html#SP1_3">§1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">12</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_5" class="paragraph-anchor"></a><b>§8.5. </b>Each page direction involves a given offset in lattice coordinates: for
|
|
example, direction 6 (E) involves an offset of \((1, 0, 0)\), because a move
|
|
in this map direction increases the \(x\)-coordinate by 1 and leaves \(y\) and \(z\)
|
|
unchanged.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::direction_as_vector</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::direction_as_vector</span></span>:<br/><a href="4-sm.html#SP8_8">§8.8</a>, <a href="4-sm.html#SP8_9">§8.9</a>, <a href="4-sm.html#SP8_24">§8.24</a>, <a href="4-sm.html#SP22">§22</a>, <a href="4-sm.html#SP23">§23</a>, <a href="4-sm.html#SP24_1_4">§24.1.4</a>, <a href="4-sm.html#SP34">§34</a>, <a href="4-sm.html#SP38_1">§38.1</a><br/>Render HTML Map - <a href="4-rhm.html#SP1_3_4">§1.3.4</a><br/>Render EPS Map - <a href="4-rem.html#SP1_2_1_6_1_2">§1.2.1.6.1.2</a>, <a href="4-rem.html#SP9">§9</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">N_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NE_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NW_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">S_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">SE_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">SW_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">E_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">W_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">U_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">D_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_6" class="paragraph-anchor"></a><b>§8.6. </b>Page directions all have opposites:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::opposite</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::opposite</span></span>:<br/><a href="4-sm.html#SP8_2">§8.2</a>, <a href="4-sm.html#SP8_14_1">§8.14.1</a>, <a href="4-sm.html#SP8_14_1_1">§8.14.1.1</a>, <a href="4-sm.html#SP8_14_1_3">§8.14.1.3</a>, <a href="4-sm.html#SP8_14_1_4">§8.14.1.4</a>, <a href="4-sm.html#SP9">§9</a>, <a href="4-sm.html#SP26_2_3_2">§26.2.3.2</a>, <a href="4-sm.html#SP8_27">§8.27</a><br/>Render EPS Map - <a href="4-rem.html#SP1_2_1_6_1">§1.2.1.6.1</a>, <a href="4-rem.html#SP1_2_1_6_1_1">§1.2.1.6.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">; </span><span class="comment-syntax"> N — S</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">; </span><span class="comment-syntax"> NE — SW</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="comment-syntax"> NW — SE</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> S — N</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">; </span><span class="comment-syntax"> SE — NW</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="comment-syntax"> SW — NE</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">; </span><span class="comment-syntax"> E — W</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">; </span><span class="comment-syntax"> W — E</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">; </span><span class="comment-syntax"> UP — DOWN</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">; </span><span class="comment-syntax"> DOWN — UP</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span><span class="plain-syntax">; </span><span class="comment-syntax"> IN — OUT</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax">; </span><span class="comment-syntax"> OUT — IN</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_7" class="paragraph-anchor"></a><b>§8.7. </b>Lateral directions can be rotated clockwise (seen from above), if <span class="extract"><span class="extract-syntax">way</span></span>
|
|
is positive; or anticlockwise if it's negative.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::rotate_direction</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::rotate_direction</span></span>:<br/><a href="4-sm.html#SP8_14_1">§8.14.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">way</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">way</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="constant-syntax">7</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=1; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><=</span><span class="identifier-syntax">N</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> N — NE</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">6</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> NE — E</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> NW — N</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">5</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> S — SW</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">3</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> SE — S</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">7</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> SW — W</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> E — SE</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; </span><span class="comment-syntax"> W — NW</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> = -1; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_8" class="paragraph-anchor"></a><b>§8.8. </b>Lateral directions are the ones which (a) are mappable, and (b) involve
|
|
movement along the \(x-y\) grid lines.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::direction_is_lateral</span><button class="popup" onclick="togglePopup('usagePopup12')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup12">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::direction_is_lateral</span></span>:<br/>Render HTML Map - <a href="4-rhm.html#SP1_3_4">§1.3.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_lateral</span></a><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_9" class="paragraph-anchor"></a><b>§8.9. </b>Along-lattice directions are those which (a) are mappable, and (b) involve
|
|
movement along grid lines. Clearly lateral directions are along-lattice, but
|
|
not necessarily vice versa.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::direction_is_along_lattice</span><button class="popup" onclick="togglePopup('usagePopup13')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup13">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::direction_is_along_lattice</span></span>:<br/><a href="4-sm.html#SP22">§22</a>, <a href="4-sm.html#SP23">§23</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">D</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_10" class="paragraph-anchor"></a><b>§8.10. </b>For speed, we don't call these functions when looping through directions;
|
|
we use these hard-wired macros instead.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_DIRECTION_NUMBERS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><12; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++)</span>
|
|
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_STORY_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; ((</span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><a href="2-fi.html#SP12" class="function-link"><span class="function-syntax">FauxInstances::no_directions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">)) && (</span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)); </span><span class="identifier-syntax">i</span><span class="plain-syntax">++)</span>
|
|
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><10; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++)</span>
|
|
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_NONLATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=10; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><12; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++)</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_11" class="paragraph-anchor"></a><b>§8.11. </b>Strictly speaking the following is more to do with rendering than
|
|
calculating, but it seems to belong here. In the HTML map, rooms have a
|
|
five-by-five cell grid, and exits are plotted at positions on the
|
|
boundary of that grid; for example, a line running in page direction 6
|
|
will be plotted with an icon at cell \((4, 2)\).
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::cell_position_for_direction</span><button class="popup" onclick="togglePopup('usagePopup14')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup14">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::cell_position_for_direction</span></span>:<br/>Render HTML Map - <a href="4-rhm.html#SP1_3_4">§1.3.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mx</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">my</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">3</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">3</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span><span class="plain-syntax">: *</span><span class="identifier-syntax">mx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">my</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_12" class="paragraph-anchor"></a><b>§8.12. </b>And similarly:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::find_icon_label</span><button class="popup" onclick="togglePopup('usagePopup15')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup15">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_icon_label</span></span>:<br/><a href="4-sm.html#SP34">§34</a>, <a href="4-sm.html#SP35_1">§35.1</a>, <a href="4-sm.html#SP36_1">§36.1</a>, <a href="4-sm.html#SP38_1">§38.1</a><br/>Render HTML Map - <a href="4-rhm.html#SP11_2_1">§11.2.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"n"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"ne"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"nw"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"s"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"se"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"sw"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"e"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"w"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"u"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"d"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"in"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"out"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span><button class="popup" onclick="togglePopup('usagePopup16')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup16">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span></span>:<br/><a href="4-sm.html#SP8_2">§8.2</a>, <a href="4-sm.html#SP24_1_2">§24.1.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"<none>"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">page_direction</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">]):</span><span class="identifier-syntax">story_direction</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">page_direction</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"north"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"northeast"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"northwest"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"south"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"southeast"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"southwest"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">6</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"east"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">7</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"west"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">8</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"up"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">9</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"down"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"inside"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span><span class="plain-syntax">: </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"outside"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="string-syntax">"<none>"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_13" class="paragraph-anchor"></a><b>§8.13. Map reading. </b>The map is read in the first faux_instance by the <span class="extract"><span class="extract-syntax">SpatialMap::room_exit</span></span>
|
|
function below, which works out what room the exit leads to, perhaps via a
|
|
door, which we take a note of if asked to do so.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::room_exit</span><button class="popup" onclick="togglePopup('usagePopup17')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup17">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::room_exit</span></span>:<br/><a href="4-sm.html#SP10">§10</a>, <a href="4-sm.html#SP44">§44</a><br/>Render HTML Map - <a href="4-rhm.html#SP1_3">§1.3</a>, <a href="4-rhm.html#SP11_2_2">§11.2.2</a><br/>Render EPS Map - <a href="4-rem.html#SP1_2_1_6">§1.2.1.6</a>, <a href="4-rem.html#SP1_2_1_6_1">§1.2.1.6.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">origin</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir_num</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">via</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">via</span><span class="plain-syntax">) *</span><span class="identifier-syntax">via</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">origin</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">origin</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) ||</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">dir_num</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">dir_num</span><span class="plain-syntax"> >= </span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ultimate_destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">origin</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exits</span><span class="plain-syntax">[</span><span class="identifier-syntax">dir_num</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">ultimate_destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_door</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">via</span><span class="plain-syntax">) *</span><span class="identifier-syntax">via</span><span class="plain-syntax"> = </span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">B</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_door_data</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">immediate_destination</span><span class="plain-syntax">, &</span><span class="identifier-syntax">A</span><span class="plain-syntax">, &</span><span class="identifier-syntax">B</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> == </span><span class="identifier-syntax">origin</span><span class="plain-syntax">) </span><span class="identifier-syntax">ultimate_destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">B</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">B</span><span class="plain-syntax"> == </span><span class="identifier-syntax">origin</span><span class="plain-syntax">) </span><span class="identifier-syntax">ultimate_destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">A</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ultimate_destination</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::room_exit_as_indexed</span><button class="popup" onclick="togglePopup('usagePopup18')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup18">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></span>:<br/><a href="4-sm.html#SP8_14">§8.14</a>, <a href="4-sm.html#SP8_14_1">§8.14.1</a>, <a href="4-sm.html#SP8_14_1_1">§8.14.1.1</a>, <a href="4-sm.html#SP8_14_1_3">§8.14.1.3</a>, <a href="4-sm.html#SP8_14_1_4">§8.14.1.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">origin</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir_num</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">via</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">j</span><span class="plain-syntax"><</span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] == </span><span class="identifier-syntax">dir_num</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">origin</span><span class="plain-syntax">, </span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">via</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_14" class="paragraph-anchor"></a><b>§8.14. </b>In practice, the map itself isn't the ideal source of data. It's slow to
|
|
keep checking all of that business with doors, and in any case the map is
|
|
asymmetrical. Instead, we use the following. The tricky point here is that
|
|
we want to record a sort of symmetric version of the map, which takes some
|
|
adjudication.
|
|
</p>
|
|
|
|
<p class="commentary">As can be seen, step (1) runs in \(O(R)\) time, where \(R\) is the number of rooms.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(1) Create the spatial relationship arrays</span><span class="named-paragraph-number">8.14</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14_1" class="named-paragraph-link"><span class="named-paragraph">Consider this Inform map connection for a spatial relationship</span><span class="named-paragraph-number">8.14.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_14_1" class="paragraph-anchor"></a><b>§8.14.1. </b>We first find a spread of nearly opposite directions: for instance, if <span class="extract"><span class="extract-syntax">i</span></span>
|
|
is northeast, then <span class="extract"><span class="extract-syntax">back</span></span> is SW, <span class="extract"><span class="extract-syntax">cw</span></span> is W, <span class="extract"><span class="extract-syntax">cwcw</span></span> is NW, <span class="extract"><span class="extract-syntax">ccw</span></span> is S, <span class="extract"><span class="extract-syntax">ccwccw</span></span>
|
|
is SE. We also find the <span class="extract"><span class="extract-syntax">backstep</span></span>, the room you get to if trying to go back
|
|
from the destination in the <span class="extract"><span class="extract-syntax">back</span></span> direction; which in a nicely arranged
|
|
map will be the room you start from, but that can't be assumed.
|
|
</p>
|
|
|
|
<p class="commentary">The cases below don't exhaust the possibilities. We could be left with a
|
|
1-way connection blocked at the other end, in cases where no 2-way
|
|
connection exists between rooms <span class="extract"><span class="extract-syntax">R</span></span> and <span class="extract"><span class="extract-syntax">T</span></span>. If so, we shrug and ignore it;
|
|
this will be a situation where the connection doesn't help us. (It will still
|
|
be plotted on the index page; we just won't use it in our choice of how to
|
|
position the rooms.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Consider this Inform map connection for a spatial relationship</span><span class="named-paragraph-number">8.14.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">back</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cw</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_7" class="function-link"><span class="function-syntax">SpatialMap::rotate_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">back</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">); </span><span class="comment-syntax"> clockwise one place</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cwcw</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_7" class="function-link"><span class="function-syntax">SpatialMap::rotate_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">); </span><span class="comment-syntax"> clockwise twice</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ccw</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_7" class="function-link"><span class="function-syntax">SpatialMap::rotate_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">back</span><span class="plain-syntax">, -1, </span><span class="identifier-syntax">session</span><span class="plain-syntax">); </span><span class="comment-syntax"> counterclockwise once</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_7" class="function-link"><span class="function-syntax">SpatialMap::rotate_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, -1, </span><span class="identifier-syntax">session</span><span class="plain-syntax">); </span><span class="comment-syntax"> counterclockwise twice</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">backstep</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">back</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14_1_1" class="named-paragraph-link"><span class="named-paragraph">Average out a pair of 2-way connections which each bend</span><span class="named-paragraph-number">8.14.1.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14_1_2" class="named-paragraph-link"><span class="named-paragraph">Turn a straightforward 2-way connection into a spatial relationship</span><span class="named-paragraph-number">8.14.1.2</span></a></span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14_1_3" class="named-paragraph-link"><span class="named-paragraph">Average out a pair of 1-way connections which suggest a deformed 2-way connection</span><span class="named-paragraph-number">8.14.1.3</span></a></span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_14_1_4" class="named-paragraph-link"><span class="named-paragraph">Treat a 1-way connection as 2-way if there are no 2-way connections already</span><span class="named-paragraph-number">8.14.1.4</span></a></span><span class="plain-syntax">;</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_14">§8.14</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP8_14_1_1" class="paragraph-anchor"></a><b>§8.14.1.1. </b>What we're looking for here is a configuration like:
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</p>
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<blockquote>
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<p>Alpha is east of Beta. Beta is south of Alpha.</p>
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</blockquote>
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<p class="commentary">This in fact sets up four connections: A is both S and W of B, and B is both
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N and E of A. A reasonable interpretation is that A lies SW of B, and so we
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form a single (symmetric) spatial relationship between them, in this direction.
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We check first clockwise, then counterclockwise.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Average out a pair of 2-way connections which each bend</span><span class="named-paragraph-number">8.14.1.1</span></span><span class="comment-syntax"> =</span>
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</p>
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|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">backstep</span><span class="plain-syntax"> == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">cwcw</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">cwcw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cwcw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">T</span><span class="plain-syntax">) &&</span>
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|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">backstep</span><span class="plain-syntax"> == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">T</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_14_1">§8.14.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_14_1_2" class="paragraph-anchor"></a><b>§8.14.1.2. </b>The easiest case:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Turn a straightforward 2-way connection into a spatial relationship</span><span class="named-paragraph-number">8.14.1.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">backstep</span><span class="plain-syntax"> == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_14_1">§8.14.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_14_1_3" class="paragraph-anchor"></a><b>§8.14.1.3. </b>Now perhaps A runs east to B, B runs south to A, but these are both 1-way
|
|
connections. We'll regard this as being a single passageway running on average
|
|
northeast from A to B:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Average out a pair of 1-way connections which suggest a deformed 2-way connection</span><span class="named-paragraph-number">8.14.1.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="comment-syntax"> a deformed 2-way connection made up of 1-way connections</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">cwcw</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">cwcw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cwcw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">T</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccwccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">T</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ccw</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_14_1">§8.14.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_14_1_4" class="paragraph-anchor"></a><b>§8.14.1.4. </b>Most of the time, a 1-way connection is fine for mapping purposes; it
|
|
establishes as good a spatial relationship as a 2-way one. But we suppress
|
|
this if either (a) there are already 2-way connections between the rooms
|
|
in general, or (b) the opposite connection exists but is to a different
|
|
room (the case where <span class="extract"><span class="extract-syntax">backstep</span></span> is not null here).
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Treat a 1-way connection as 2-way if there are no 2-way connections already</span><span class="named-paragraph-number">8.14.1.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">two_ways</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">R</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit_as_indexed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">T</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">two_ways</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">two_ways</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">backstep</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP9" class="function-link"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_14_1">§8.14.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. </b>The following ensures that SR links are always symmetric, in opposed
|
|
pairs of directions:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::form_spatial_relationship</span><button class="popup" onclick="togglePopup('usagePopup19')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup19">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::form_spatial_relationship</span></span>:<br/><a href="4-sm.html#SP8_14_1_1">§8.14.1.1</a>, <a href="4-sm.html#SP8_14_1_2">§8.14.1.2</a>, <a href="4-sm.html#SP8_14_1_3">§8.14.1.3</a>, <a href="4-sm.html#SP8_14_1_4">§8.14.1.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_relationship</span><span class="plain-syntax">[</span><span class="identifier-syntax">dir</span><span class="plain-syntax">] = </span><span class="identifier-syntax">T</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_relationship</span><span class="plain-syntax">[</span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dir</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">)] = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. </b>The spatial relationships arrays are read only by the following. Note
|
|
that <span class="extract"><span class="extract-syntax">SpatialMap::read_smap</span></span> suppresses relationships between different submaps (at
|
|
least once the initial map components have been set up). This is done to
|
|
make it easy and quick to cut up a submap into two sub-submaps; effectively
|
|
severing any links between them. All we need do is move the rooms around
|
|
from one submap to another.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="extract"><span class="extract-syntax">SpatialMap::read_smap_cross</span></span> has the ability to read relationships which cross submap
|
|
boundaries, and will be needed when we place submaps on the global grid.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::read_smap</span><button class="popup" onclick="togglePopup('usagePopup20')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup20">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::read_smap</span></span>:<br/><a href="4-sm.html#SP8_22">§8.22</a>, <a href="4-sm.html#SP18">§18</a>, <a href="4-sm.html#SP22">§22</a>, <a href="4-sm.html#SP23">§23</a>, <a href="4-sm.html#SP26">§26</a>, <a href="4-sm.html#SP28">§28</a>, <a href="4-sm.html#SP30">§30</a>, <a href="4-sm.html#SP33_1">§33.1</a>, <a href="4-sm.html#SP34">§34</a>, <a href="4-sm.html#SP35_1">§35.1</a>, <a href="4-sm.html#SP36">§36</a>, <a href="4-sm.html#SP37">§37</a>, <a href="4-sm.html#SP38">§38</a>, <a href="4-sm.html#SP8_27">§8.27</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"tried to read smap at null room"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_relationship</span><span class="plain-syntax">[</span><span class="identifier-syntax">dir</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">partitioned_into_components</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">to</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> != </span><span class="identifier-syntax">to</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::read_smap_cross</span><button class="popup" onclick="togglePopup('usagePopup21')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup21">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::read_smap_cross</span></span>:<br/><a href="4-sm.html#SP43">§43</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"tried to read smap at null room"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="identifier-syntax">dir</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>§11. </b>While we're at it:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::read_slock</span><button class="popup" onclick="togglePopup('usagePopup22')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup22">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::read_slock</span></span>:<br/><a href="4-sm.html#SP8_22">§8.22</a>, <a href="4-sm.html#SP8_24">§8.24</a>, <a href="4-sm.html#SP26">§26</a>, <a href="4-sm.html#SP26_2_3_2">§26.2.3.2</a>, <a href="4-sm.html#SP28">§28</a>, <a href="4-sm.html#SP30">§30</a>, <a href="4-sm.html#SP37">§37</a>, <a href="4-sm.html#SP8_27">§8.27</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"tried to read slock at null room"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">lock_exits</span><span class="plain-syntax">[</span><span class="identifier-syntax">dir</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>§12. Submap construction. </b>Here's an empty submap, with no rooms.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="function-syntax">SpatialMap::new_submap</span><button class="popup" onclick="togglePopup('usagePopup23')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup23">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::new_submap</span></span>:<br/><a href="4-sm.html#SP8_22">§8.22</a>, <a href="4-sm.html#SP24_1_3">§24.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::add_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">first_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">discarded</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>§13. </b>This will loop through all of the submaps attached to a session, assuming
|
|
that <span class="extract"><span class="extract-syntax">LS</span></span> already holds the session's list:
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax">, </span><span class="identifier-syntax">LS</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">discarded</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP14" class="paragraph-anchor"></a><b>§14. </b>Doctrinally, a room is always in just one submap, except at the very beginning
|
|
when we are forming the original components into submaps, when most of the
|
|
rooms aren't yet in any submap. Doctrinally, too, if a room is in a submap,
|
|
any room locked to it must always be in the same submap.
|
|
</p>
|
|
|
|
<p class="commentary">That makes the following function dangerous to use, since it doesn't guarantee
|
|
either of those things. Use with care.
|
|
</p>
|
|
|
|
<p class="commentary">Because we keep a double-ended linked list to hold membership, adding a
|
|
room to a submap takes constant time with respect to the number of rooms \(R\).
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::add_room_to_submap</span><button class="popup" onclick="togglePopup('usagePopup24')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup24">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::add_room_to_submap</span></span>:<br/><a href="4-sm.html#SP8_19">§8.19</a>, <a href="4-sm.html#SP8_20">§8.20</a>, <a href="4-sm.html#SP8_22">§8.22</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">first_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax">-></span><span class="element-syntax">next_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">next_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP17" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP15" class="paragraph-anchor"></a><b>§15. </b>Here is how we read from the incidence cache. Its purpose is to provide
|
|
a constant running-time way to find out if a given position would collide
|
|
with that of an existing room in the submap — something we could otherwise
|
|
find out only by an \(O(R)\) search. If we had to maintain enormous submaps
|
|
of rooms, we'd probably want a balanced geographical tree structure, of the
|
|
sort used for collision detection in first-person shooters; but as it is,
|
|
we have plenty of memory and relatively few possible location coordinate
|
|
positions. So we simply keep a cubical array; though it may need to be
|
|
resized as the rooms in the submap move around, which complicates things.
|
|
</p>
|
|
|
|
<p class="commentary">Anyway, this returns the number of rooms at position P within the submap.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::occupied_in_submap</span><button class="popup" onclick="togglePopup('usagePopup25')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup25">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::occupied_in_submap</span></span>:<br/><a href="4-sm.html#SP22">§22</a>, <a href="4-sm.html#SP8_28">§8.28</a>, <a href="4-sm.html#SP41">§41</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP16" class="paragraph-anchor"></a><b>§16. </b>The cache will be invalidated by any movement of a room, so the following
|
|
function must be notified of any such:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::move_room_within_submap</span><button class="popup" onclick="togglePopup('usagePopup26')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup26">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::move_room_within_submap</span></span>:<br/><a href="4-sm.html#SP8_1">§8.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">O</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP17" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">O</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP17" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP17" class="paragraph-anchor"></a><b>§17. </b>Here goes, then: the following increments the cached population value at <span class="extract"><span class="extract-syntax">P</span></span>
|
|
if <span class="extract"><span class="extract-syntax">m</span></span> is 1, decrements it if \(-1\).
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::add_room_to_cache</span><button class="popup" onclick="togglePopup('usagePopup27')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup27">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::add_room_to_cache</span></span>:<br/><a href="4-sm.html#SP14">§14</a>, <a href="4-sm.html#SP16">§16</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">m</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sg.html#SP13" class="function-link"><span class="function-syntax">Geometry::within_cuboid</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP17_1" class="named-paragraph-link"><span class="named-paragraph">Location P lies outside the current incidence cache</span><span class="named-paragraph-number">17.1</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">+</span><span class="identifier-syntax">m</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = -</span><span class="identifier-syntax">m</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">t</span><span class="plain-syntax">+</span><span class="identifier-syntax">m</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax"> += </span><span class="constant-syntax">2</span><span class="plain-syntax">*</span><span class="identifier-syntax">t</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax"> == -1) </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax"> -= </span><span class="constant-syntax">2</span><span class="plain-syntax">*(</span><span class="identifier-syntax">t</span><span class="plain-syntax">-1);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP17_1" class="paragraph-anchor"></a><b>§17.1. </b>We make a new incidence cache which is more than large enough to contain
|
|
both P and the existing one, and then copy the old one's contents into the
|
|
new one before deallocating the old.
|
|
</p>
|
|
|
|
<p class="commentary">This looks as if it has cubic running time, but isn't really that bad,
|
|
since the volume of the cuboid is probably about proportional to \(R\) rather
|
|
than \(R^3\) (assuming rooms are fairly evenly distributed through space).
|
|
Still, we ought to make sure it happens fairly seldom. We therefore expand
|
|
the cuboid by a margin giving us always at least 20 more cells than we need
|
|
horizontally, and 3 vertically. Since movements within submaps are modest
|
|
and local, this means very few submaps need to expand more than twice at
|
|
the most.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Location P lies outside the current incidence cache</span><span class="named-paragraph-number">17.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax"> = </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP15" class="function-link"><span class="function-syntax">Geometry::thicken_cuboid</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(20, </span><span class="constant-syntax">20</span><span class="plain-syntax">, </span><span class="constant-syntax">3</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">extent</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_volume</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_cache</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">extent</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax">), </span><span class="constant-syntax">MAP_INDEX_MREASON</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">z</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">y</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">z</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">; </span><span class="identifier-syntax">z</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">; </span><span class="identifier-syntax">z</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_index</span></a><span class="plain-syntax">(</span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x</span><span class="plain-syntax">,</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span><span class="identifier-syntax">z</span><span class="plain-syntax">), </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">old_cache</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">old_cache</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax"> = </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">y</span><span class="plain-syntax"> = </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">z</span><span class="plain-syntax"> = </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">; </span><span class="identifier-syntax">z</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">; </span><span class="identifier-syntax">z</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_index</span></a><span class="plain-syntax">(</span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x</span><span class="plain-syntax">,</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span><span class="identifier-syntax">z</span><span class="plain-syntax">), </span><span class="identifier-syntax">old_cuboid</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">old_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP14" class="function-link"><span class="function-syntax">Geometry::cuboid_index</span></a><span class="plain-syntax">(</span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x</span><span class="plain-syntax">,</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span><span class="identifier-syntax">z</span><span class="plain-syntax">), </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_cache</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = </span><span class="identifier-syntax">t</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_15" class="function-link"><span class="function-syntax">SpatialMap::free_incidence_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_cache</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_size</span><span class="plain-syntax"> = </span><span class="identifier-syntax">extent</span><span class="plain-syntax">*((</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_cuboid</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP17">§17</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_15" class="paragraph-anchor"></a><b>§8.15. </b>Here we throw away the cache, something which must otherwise only be done
|
|
when the submap has no rooms...
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::free_incidence_cache</span><button class="popup" onclick="togglePopup('usagePopup28')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup28">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::free_incidence_cache</span></span>:<br/><a href="4-sm.html#SP17_1">§17.1</a>, <a href="4-sm.html#SP8_16">§8.16</a>, <a href="4-sm.html#SP8_17">§8.17</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Memory::I7_free</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax">, </span><span class="constant-syntax">MAP_INDEX_MREASON</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_size</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_16" class="paragraph-anchor"></a><b>§8.16. </b>...such as now:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::empty_submap</span><button class="popup" onclick="togglePopup('usagePopup29')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup29">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::empty_submap</span></span>:<br/><a href="4-sm.html#SP8_19">§8.19</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">first_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">last_room_in_submap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_15" class="function-link"><span class="function-syntax">SpatialMap::free_incidence_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_17" class="paragraph-anchor"></a><b>§8.17. </b>And finally:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::destroy_submap</span><button class="popup" onclick="togglePopup('usagePopup30')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup30">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::destroy_submap</span></span>:<br/><a href="4-sm.html#SP24_1_3">§24.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_15" class="function-link"><span class="function-syntax">SpatialMap::free_incidence_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">discarded</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_18" class="paragraph-anchor"></a><b>§8.18. </b>Suppose we want to move all the rooms in a submap at once, and all by the
|
|
same vector <span class="extract"><span class="extract-syntax">D</span></span>. Then we can simply move the cache boundaries, too, and not
|
|
have to change the contents of the cache at all.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::move_component</span><button class="popup" onclick="togglePopup('usagePopup31')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup31">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::move_component</span></span>:<br/><a href="4-sm.html#SP8_29_1_1">§8.29.1.1</a>, <a href="4-sm.html#SP8_29_1_2">§8.29.1.2</a>, <a href="4-sm.html#SP8_29_1_3">§8.29.1.3</a>, <a href="4-sm.html#SP8_29_1_3_1">§8.29.1.3.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position_breaking_cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP12" class="function-link"><span class="function-syntax">Geometry::cuboid_translate</span></a><span class="plain-syntax">(&(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP12" class="function-link"><span class="function-syntax">Geometry::cuboid_translate</span></a><span class="plain-syntax">(&(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">incidence_cache_bounds</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_19" class="paragraph-anchor"></a><b>§8.19. </b>The following functions will be used in order to divide an existing submap
|
|
into two new ones, which we'll call Zone 1 and Zone 2, and then to merge
|
|
them back again.
|
|
</p>
|
|
|
|
<p class="commentary">We start with each room in <span class="extract"><span class="extract-syntax">sub</span></span> having a value of <span class="extract"><span class="extract-syntax">zone</span></span> set to either
|
|
<span class="extract"><span class="extract-syntax">Z1_number</span></span> or <span class="extract"><span class="extract-syntax">Z2_number</span></span>, the former meaning it is destined for Zone 1,
|
|
the latter for Zone 2. It's assumed here that if two rooms are locked together
|
|
then they have the same value of <span class="extract"><span class="extract-syntax">zone</span></span>. With that done, we empty <span class="extract"><span class="extract-syntax">sub</span></span>,
|
|
since its rooms have all moved out.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::create_submaps_from_zones</span><button class="popup" onclick="togglePopup('usagePopup32')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup32">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::create_submaps_from_zones</span></span>:<br/><a href="4-sm.html#SP24_1_3">§24.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_16" class="function-link"><span class="function-syntax">SpatialMap::empty_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_20" class="paragraph-anchor"></a><b>§8.20. </b>Convert membership of Zone 1 or 2 back into value of the zone number: the
|
|
reverse process exactly.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::create_zones_from_submaps</span><button class="popup" onclick="togglePopup('usagePopup33')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup33">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::create_zones_from_submaps</span></span>:<br/><a href="4-sm.html#SP24_1_3">§24.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_21" class="paragraph-anchor"></a><b>§8.21. Partitioning to component submaps. </b>We can now go back to our strategy. The next task is to partition the map into
|
|
components, that is, equivalence classes under the closure of the relation
|
|
\(R\sim S\) if either \(R\) is locked to \(S\) or if there is a spatial relationship
|
|
between \(R\) and \(S\).
|
|
</p>
|
|
|
|
<p class="commentary">We ensure that the first-created component is the one containing the
|
|
benchmark room.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(2) Partition the set of rooms into component submaps</span><span class="named-paragraph-number">8.21</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_22" class="function-link"><span class="function-syntax">SpatialMap::create_map_component_around</span></a><span class="plain-syntax">(</span><a href="2-fi.html#SP11" class="function-link"><span class="function-syntax">FauxInstances::benchmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">), </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_22" class="function-link"><span class="function-syntax">SpatialMap::create_map_component_around</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_22" class="paragraph-anchor"></a><b>§8.22. </b>The following grows a component outwards from <span class="extract"><span class="extract-syntax">at</span></span>, so that it also includes
|
|
all rooms locked to <span class="extract"><span class="extract-syntax">at</span></span> or with a SR to it. If <span class="extract"><span class="extract-syntax">at</span></span> is currently not in a
|
|
component, we start a new submap to hold it.
|
|
</p>
|
|
|
|
<p class="commentary">Note that <span class="extract"><span class="extract-syntax">SpatialMap::create_map_component_around</span></span> has constant running time, i.e., it
|
|
doesn't depend on \(R\), the number of rooms. It is called exactly once for
|
|
each room, so phase (2) has running time \(O(R)\).
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::create_map_component_around</span><button class="popup" onclick="togglePopup('usagePopup34')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup34">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::create_map_component_around</span></span>:<br/><a href="4-sm.html#SP8_21">§8.21</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><a href="4-sm.html#SP12" class="function-link"><span class="function-syntax">SpatialMap::new_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">));</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">locked_to</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">locked_to</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">locked_to</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> != </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">locked_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_22" class="function-link"><span class="function-syntax">SpatialMap::create_map_component_around</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">locked_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">dest</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">dest</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">dest</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> != </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP14" class="function-link"><span class="function-syntax">SpatialMap::add_room_to_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dest</span><span class="plain-syntax">, </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_22" class="function-link"><span class="function-syntax">SpatialMap::create_map_component_around</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dest</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_23" class="paragraph-anchor"></a><b>§8.23. Movements of single rooms. </b>Positions are just 3-vectors, so:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::translate_room</span><button class="popup" onclick="togglePopup('usagePopup35')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup35">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::translate_room</span></span>:<br/><a href="4-sm.html#SP24_1_4_1">§24.1.4.1</a>, <a href="4-sm.html#SP36_1">§36.1</a>, <a href="4-sm.html#SP38_1_1">§38.1.1</a>, <a href="4-sm.html#SP8_32">§8.32</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::move_room_to</span><button class="popup" onclick="togglePopup('usagePopup36')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup36">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::move_room_to</span></span>:<br/><a href="4-sm.html#SP34">§34</a>, <a href="4-sm.html#SP8_28">§8.28</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_24" class="function-link"><span class="function-syntax">SpatialMap::move_anything_locked_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_24" class="paragraph-anchor"></a><b>§8.24. Synchronising movements of locked rooms. </b>The next preliminary we need is the implementation of locking. As we've seen,
|
|
the source text can instruct us to lock one room so that it lies perfectly
|
|
placed with respect to another (in the sense that if there were an exit
|
|
between them in that direction then it would have heat 0).
|
|
</p>
|
|
|
|
<p class="commentary">The following is for use after room R has been moved to a new grid position;
|
|
it moves anything locked to R (and anything locked to that, and so on) to
|
|
corresponding positions.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::move_anything_locked_to</span><button class="popup" onclick="togglePopup('usagePopup37')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup37">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::move_anything_locked_to</span></span>:<br/><a href="4-sm.html#SP8_23">§8.23</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">shifted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_24" class="function-link"><span class="function-syntax">SpatialMap::move_anything_locked_to_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::move_anything_locked_to_r</span><button class="popup" onclick="togglePopup('usagePopup38')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup38">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::move_anything_locked_to_r</span></span>:<br/><a href="4-sm.html#SP8_25">§8.25</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">shifted</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">shifted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">F</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">F</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_24" class="function-link"><span class="function-syntax">SpatialMap::move_anything_locked_to_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_25" class="paragraph-anchor"></a><b>§8.25. </b>That allows us to define the initial state of placements in a submap.
|
|
All rooms begin at (0,0,0), except that locking may offset a few of them
|
|
slightly. This runs in \(O(R)\) time.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::lock_positions_in_submap</span><button class="popup" onclick="togglePopup('usagePopup39')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup39">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::lock_positions_in_submap</span></span>:<br/><a href="4-sm.html#SP8_26">§8.26</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">shifted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_24" class="function-link"><span class="function-syntax">SpatialMap::move_anything_locked_to_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_26" class="paragraph-anchor"></a><b>§8.26. Positioning within components. </b>This is much more difficult. It's going to be a matter of minimising the
|
|
badness of the configuration, but to talk about it it's convenient to have
|
|
a better word than "badness". So the "heat" is a penalty score
|
|
calculated at each map connection which keeps track of the badness of local
|
|
geometric distortion; thus, lowering the temperature improves the geometry.
|
|
We want to reduce the total amount of heat, ideally to absolute zero, but
|
|
we also to want to avoid hot-spots.
|
|
</p>
|
|
|
|
<p class="commentary">The worst case for running time here is when the entire map is a single component;
|
|
the loop over submaps doesn't therefore add to the running time.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(3) Position the rooms within each component</span><span class="named-paragraph-number">8.26</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">total_accuracy</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Laying out component %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_25" class="function-link"><span class="function-syntax">SpatialMap::lock_positions_in_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">); </span><span class="comment-syntax"> </span>\(O(R)\)<span class="comment-syntax"> running time</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP18" class="function-link"><span class="function-syntax">SpatialMap::establish_natural_lengths</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">); </span><span class="comment-syntax"> </span>\(O(R)\)<span class="comment-syntax"> running time</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP24" class="function-link"><span class="function-syntax">SpatialMap::position_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">total_accuracy</span><span class="plain-syntax"> += </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Component %d has final heat %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nAll components laid out: total heat %d\n\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">total_accuracy</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: cutpoint choosing %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cutpoint_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: dividing %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">division_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: sliding %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">slide_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: cooling %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cooling_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: quenching %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">quenching_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: diffusion %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">diffusion_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: radiation %d drognas\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">radiation_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cost: explosion %d drognas\n\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">explosion_spending</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP18" class="paragraph-anchor"></a><b>§18. </b>Every spatial relationship has a "length", which is a positive integer.
|
|
This is our preferred amount of stretch when laying out the rooms; a
|
|
length of 1 means one grid increment, and that's our preference if we
|
|
can have it. Initially, all SRs have length 1.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::establish_natural_lengths</span><button class="popup" onclick="togglePopup('usagePopup40')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup40">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::establish_natural_lengths</span></span>:<br/><a href="4-sm.html#SP8_26">§8.26</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP19" class="paragraph-anchor"></a><b>§19. Heat. </b>Before we can get any further with (3), we need to be able to measure heat. For
|
|
a submap, it's the sum of its room heats, plus additional heat (and a
|
|
lot of it) for each pair of rooms occupying the same grid location. We also
|
|
refresh the cached value of the smallest squarely oriented cuboid which
|
|
contains the component.
|
|
</p>
|
|
|
|
<p class="commentary">The mapmaker behaves slowly if the collision heat penalty is low enough
|
|
that large amounts of heat soaked up from ordinary exits can ever exceed it.
|
|
On the other hand, for very large maps with horrible tangles the total number
|
|
of collisions can be enormous, and quite high heats are observed; I've seen
|
|
temperatures over 165,000,000, so temperatures of 1,000,000,000 are not at
|
|
all out of the question. So we will be careful, just on the safe side,
|
|
not to overflow a single <span class="extract"><span class="extract-syntax">int</span></span>; we'll cap temperatures except to add a tiny
|
|
extra heat so that there is still a slight incentive to remove collisions
|
|
even in submaps at this unthinkably hot level.
|
|
</p>
|
|
|
|
<p class="commentary">The FHM magazine website informs me that the current (2010) maximal value of
|
|
temperature is <span class="extract"><span class="extract-syntax">CHERYL_COLE</span></span>, but I think I'll call it <span class="extract"><span class="extract-syntax">FUSION_POINT</span></span>.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">OVERLYING_HEAT</span><span class="plain-syntax"> </span><span class="constant-syntax">20</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax"> </span><span class="constant-syntax">50000</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax"> </span><span class="constant-syntax">1000000000</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::heat_sum</span><button class="popup" onclick="togglePopup('usagePopup41')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup41">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::heat_sum</span></span>:<br/><a href="4-sm.html#SP20">§20</a>, <a href="4-sm.html#SP43">§43</a>, <a href="4-sm.html#SP43_1">§43.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax"> = </span><span class="identifier-syntax">h1</span><span class="plain-syntax">+</span><span class="identifier-syntax">h2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">h</span><span class="plain-syntax"> > </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP20" class="paragraph-anchor"></a><b>§20. </b>Finding the heat of a submap runs in \(O(S)\) time, where \(S\) is the number
|
|
of rooms in the submap; this is the point of having the incidence cache,
|
|
without which it would be \(O(S^2)\). (Even so, we will try to make \(S\) a lot
|
|
smaller than \(R\).)
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_submap_heat</span><button class="popup" onclick="togglePopup('usagePopup42')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup42">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_submap_heat</span></span>:<br/><a href="4-sm.html#SP24">§24</a>, <a href="4-sm.html#SP24_1">§24.1</a>, <a href="4-sm.html#SP24_1_1">§24.1.1</a>, <a href="4-sm.html#SP24_1_4">§24.1.4</a>, <a href="4-sm.html#SP32">§32</a>, <a href="4-sm.html#SP35">§35</a>, <a href="4-sm.html#SP35_1">§35.1</a>, <a href="4-sm.html#SP36">§36</a>, <a href="4-sm.html#SP36_1">§36.1</a>, <a href="4-sm.html#SP38">§38</a>, <a href="4-sm.html#SP38_1_1">§38.1.1</a>, <a href="4-sm.html#SP8_28">§8.28</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">heat</span><span class="plain-syntax">, </span><a href="4-sm.html#SP21" class="function-link"><span class="function-syntax">SpatialMap::find_room_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::adjust_cuboid</span></a><span class="plain-syntax">(&(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">collisions</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">collisions</span><span class="plain-syntax"> >= </span><span class="constant-syntax">1000</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">heat</span><span class="plain-syntax">, </span><span class="constant-syntax">1000</span><span class="plain-syntax">*</span><span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">collisions</span><span class="plain-syntax"> -= </span><span class="constant-syntax">1000</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">collisions</span><span class="plain-syntax">*</span><span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> == </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">) </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax"> + </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">superpositions</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP21" class="paragraph-anchor"></a><b>§21. </b>The total heat for a room is in turn the sum of its exit heats. This runs
|
|
in constant time.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_room_heat</span><button class="popup" onclick="togglePopup('usagePopup43')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup43">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_room_heat</span></span>:<br/><a href="4-sm.html#SP20">§20</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">h</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) </span><span class="identifier-syntax">h</span><span class="plain-syntax"> += </span><a href="4-sm.html#SP22" class="function-link"><span class="function-syntax">SpatialMap::find_exit_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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|
<p class="commentary firstcommentary"><a id="SP22" class="paragraph-anchor"></a><b>§22. </b>So now we come to it: measuring the heat of an exit, which is a matter of
|
|
how much geometric distortion it has in the current layout. This is based
|
|
primarily on the angular divergence in direction between the known exit
|
|
direction and the grid direction, and only secondarily on distance
|
|
anomalies, because when the user typed "the Field is east of the River"
|
|
no particular distance was implied. As with Harry Beck's London Underground
|
|
map (1931), we may be constrained to use only about eight possible angles but
|
|
nevertheless care more about angle than length.
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|
</p>
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|
|
|
<p class="commentary">Note that an exit in the lattice (i.e., not IN or OUT) which joins two
|
|
different rooms can only have heat 0 if the destination room lies exactly
|
|
at the optimal grid offset from the origin room. (In the sense that you'd
|
|
expect the room north from \((0,0,0)\) to be at \((0,1,0)\), and so on.) A
|
|
component therefore has a total heat of 0 if and only if it has been
|
|
aligned perfectly on a grid such that all exits are optimal.
|
|
</p>
|
|
|
|
<p class="commentary">This too runs in constant time.
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</p>
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|
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|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">ANGULAR_MULTIPLIER</span><span class="plain-syntax"> </span><span class="constant-syntax">50</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_exit_heat</span><button class="popup" onclick="togglePopup('usagePopup44')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup44">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_exit_heat</span></span>:<br/><a href="4-sm.html#SP21">§21</a>, <a href="4-sm.html#SP33_1">§33.1</a>, <a href="4-sm.html#SP35">§35</a>, <a href="4-sm.html#SP37">§37</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">++;</span>
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|
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">to</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> if there's no exit this way, there's no heat</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> an exit from a room to itself doesn't show on the map</span>
|
|
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP8_9" class="function-link"><span class="function-syntax">SpatialMap::direction_is_along_lattice</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> IN, OUT generate no heat</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">));</span>
|
|
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">D</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax">; </span><span class="comment-syntax"> the two rooms have collided!</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">E</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">distance_distortion</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP8" class="function-link"><span class="function-syntax">Geometry::vec_length_squared</span></a><span class="plain-syntax">(</span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">E</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">distance_distortion</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> perfect placement</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">angular_distortion</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) (</span><span class="constant-syntax">ANGULAR_MULTIPLIER</span><span class="plain-syntax">*</span><a href="4-sg.html#SP9" class="function-link"><span class="function-syntax">Geometry::vec_angular_separation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">E</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">overlying_penalty</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">angular_distortion</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">E</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">E</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">++ < </span><span class="constant-syntax">20</span><span class="plain-syntax">) && (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">)) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP15" class="function-link"><span class="function-syntax">SpatialMap::occupied_in_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">overlying_penalty</span><span class="plain-syntax"> += </span><span class="constant-syntax">OVERLYING_HEAT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">E</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">angular_distortion</span><span class="plain-syntax"> + </span><span class="identifier-syntax">distance_distortion</span><span class="plain-syntax"> + </span><span class="identifier-syntax">overlying_penalty</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP23" class="paragraph-anchor"></a><b>§23. </b>The following simply tests whether a link is correctly aligned, in that
|
|
the destination room lies along a multiple of the exit vector from the
|
|
origin. In effect, it tests whether <span class="extract"><span class="extract-syntax">angular_distortion</span></span> is zero.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::exit_aligned</span><button class="popup" onclick="togglePopup('usagePopup45')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup45">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::exit_aligned</span></span>:<br/><a href="4-sm.html#SP38">§38</a>, <a href="4-sm.html#SP38_1">§38.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">++;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">to</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="comment-syntax"> at any rate, not misaligned</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="comment-syntax"> ditto</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP8_9" class="function-link"><span class="function-syntax">SpatialMap::direction_is_along_lattice</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="comment-syntax"> IN, OUT are always aligned</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">from</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">D</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="comment-syntax"> bad, but not for alignment reasons</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">E</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">angular_distortion</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) (</span><span class="constant-syntax">ANGULAR_MULTIPLIER</span><span class="plain-syntax">*</span><a href="4-sg.html#SP9" class="function-link"><span class="function-syntax">Geometry::vec_angular_separation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">E</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">angular_distortion</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP24" class="paragraph-anchor"></a><b>§24. Subdividing our submap. </b>Any remotely good algorithm for this task will have a dangerous running time
|
|
if let loose on the entire map, and in any case, the entirety may have such
|
|
a complex layout that it defeats our tactics. So we need a divide-and-rule
|
|
method; one which cuts the map into two pieces, positions each piece, and
|
|
then glues them back together again.
|
|
</p>
|
|
|
|
<p class="commentary">We will eventually use five tactics: cooling, quenching, diffusion,
|
|
radiation and explosion. Cooling is quick and useful, so we'll try that
|
|
first even before looking for subdivisions.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">unique_Z_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::position_submap</span><button class="popup" onclick="togglePopup('usagePopup46')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup46">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::position_submap</span></span>:<br/><a href="4-sm.html#SP8_26">§8.26</a>, <a href="4-sm.html#SP24_1_3">§24.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nPOSITIONING submap %d: initial heat %d"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">": nothing to do"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">SPATIAL_MAP_DA</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">++) % </span><span class="constant-syntax">8</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"\n "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">" %S"</span><span class="plain-syntax">, </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP32" class="function-link"><span class="function-syntax">SpatialMap::cool_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1" class="named-paragraph-link"><span class="named-paragraph">Attempt to divide the current submap in two</span><span class="named-paragraph-number">24.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nPOSITIONING submap %d done: cooled by %d to %d "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"at cost of %d drognas\n\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP24_1" class="paragraph-anchor"></a><b>§24.1. </b>We will look for a way to divide the rooms up into two subsets, allocating
|
|
each subset a unique zone number. (We must remember that all of this code is
|
|
running recursively.)
|
|
</p>
|
|
|
|
<p class="commentary">There are three cases: sometimes the <span class="extract"><span class="extract-syntax">SpatialMap::work_out_optimal_cutpoint</span></span> function
|
|
recommends cutting a single spatial relationship, from <span class="extract"><span class="extract-syntax">div_F1</span></span> to <span class="extract"><span class="extract-syntax">div_T1</span></span>,
|
|
and sometimes it recommends cutting a pair. Then again, sometimes it finds
|
|
no good cutpoint.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Attempt to divide the current submap in two</span><span class="named-paragraph-number">24.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax"> = </span><span class="identifier-syntax">unique_Z_number</span><span class="plain-syntax">++, </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax"> = </span><span class="identifier-syntax">unique_Z_number</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax"> = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">div_F2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">div_T2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">div_dir2</span><span class="plain-syntax"> = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">found</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP25" class="function-link"><span class="function-syntax">SpatialMap::work_out_optimal_cutpoint</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, &</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, &</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">, &</span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> &</span><span class="identifier-syntax">div_F2</span><span class="plain-syntax">, &</span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">, &</span><span class="identifier-syntax">div_dir2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cutpoint_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">found</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_2" class="named-paragraph-link"><span class="named-paragraph">Set the zone numbers throughout the two soon-to-be zones</span><span class="named-paragraph-number">24.1.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_3" class="named-paragraph-link"><span class="named-paragraph">Divide the submap into zones, recurse to position those, then merge back</span><span class="named-paragraph-number">24.1.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_4" class="named-paragraph-link"><span class="named-paragraph">Slide the two former zones together along the F1-to-T1 line, minimising heat</span><span class="named-paragraph-number">24.1.4</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="4-sm.html#SP38" class="function-link"><span class="function-syntax">SpatialMap::radiate_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_1" class="named-paragraph-link"><span class="named-paragraph">Position this indivisible component</span><span class="named-paragraph-number">24.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24">§24</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP24_1_1" class="paragraph-anchor"></a><b>§24.1.1. </b>When we can't divide, we use our remaining three tactics, stopping if the
|
|
submap should reach absolute zero:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Position this indivisible component</span><span class="named-paragraph-number">24.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP35" class="function-link"><span class="function-syntax">SpatialMap::quench_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP36" class="function-link"><span class="function-syntax">SpatialMap::diffuse_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP35" class="function-link"><span class="function-syntax">SpatialMap::quench_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP38" class="function-link"><span class="function-syntax">SpatialMap::radiate_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) >= </span><span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_28" class="function-link"><span class="function-syntax">SpatialMap::explode_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24_1">§24.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP24_1_2" class="paragraph-anchor"></a><b>§24.1.2. </b>Supposing we can divide, though, we need to set zone numbers throughout
|
|
the submap, and the procedure is different depending on whether we're
|
|
dividing at one relationship F1-to-T1 or at two, F1-to-T1 and F2-to-T2.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Set the zone numbers throughout the two soon-to-be zones</span><span class="named-paragraph-number">24.1.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">div_F2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP29" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_twocut</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_F2</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">) </span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">) </span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Making a double cut: %S %s to %S and %S %s to %S at cost %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_F2</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_dir2</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">division_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP27" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_onecut</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> &</span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax">, &</span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Making a single cut: %S %s to %S at cost %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::usual_Inform_direction_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">division_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">predivision_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"This produces two zones of sizes %d and %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24_1">§24.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP24_1_3" class="paragraph-anchor"></a><b>§24.1.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Divide the submap into zones, recurse to position those, then merge back</span><span class="named-paragraph-number">24.1.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone1</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP12" class="function-link"><span class="function-syntax">SpatialMap::new_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Zone2</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP12" class="function-link"><span class="function-syntax">SpatialMap::new_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_19" class="function-link"><span class="function-syntax">SpatialMap::create_submaps_from_zones</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Zone 1 becomes submap %d; zone 2 becomes submap %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP24" class="function-link"><span class="function-syntax">SpatialMap::position_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP24" class="function-link"><span class="function-syntax">SpatialMap::position_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_20" class="function-link"><span class="function-syntax">SpatialMap::create_zones_from_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z1_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">, </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Destroying submaps %d and %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_17" class="function-link"><span class="function-syntax">SpatialMap::destroy_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Zone1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_17" class="function-link"><span class="function-syntax">SpatialMap::destroy_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Zone2</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24_1">§24.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP24_1_4" class="paragraph-anchor"></a><b>§24.1.4. </b>The zone-1 rooms are now correctly placed with respect to each other, and
|
|
vice versa, but we might have a horrendous breakage where the two sets of
|
|
rooms meet. We need to rejoin them, and we do this by stretching the
|
|
F1-to-T1 line segment to that length which minimises the total heat of
|
|
the submap. For a single cut, this is clearly the smallest length such
|
|
that there's no collision between old zone-1 and old zone-2 rooms.
|
|
</p>
|
|
|
|
<p class="commentary">The worst case is a configuration like so:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>X is west of Y. X1 is northeast of X. X2 is northeast of X. Y1 is northwest of Y. Y2 is northwest of Y1.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">We've cut between X and Y. To give clearance so that X2 and Y2 do not collide,
|
|
the new length X to Y needs to be 5.
|
|
</p>
|
|
|
|
<p class="commentary">However, it's computationally too expensive to check every possible length
|
|
as high as that: it would run in \(O(S^2)\) time, and we must remember that
|
|
this is the divide-and-rule code running on even the largest submaps, so
|
|
that this is effectively an \(O(R^2)\) algorithm. On a 300-room example source
|
|
text (the entire London Underground map, zones 1 to 7) this results in
|
|
sliding taking up about 80 percent of our time, which is unacceptable.
|
|
</p>
|
|
|
|
<p class="commentary">We therefore cap the length once we have reduced below the collision penalty.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">CAP_ON_SLIDE_LENGTHS</span><span class="plain-syntax"> </span><span class="constant-syntax">10</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Slide the two former zones together along the F1-to-T1 line, minimising heat</span><span class="named-paragraph-number">24.1.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">preslide_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Axis</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">worst_case_length</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">worst_case_length</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">worst_case_length</span><span class="plain-syntax">--;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">coolest_L</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax"> = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="identifier-syntax">L</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">worst_case_length</span><span class="plain-syntax">; </span><span class="identifier-syntax">L</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::save_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_4_1" class="named-paragraph-link"><span class="named-paragraph">Displace zone 2 relative to zone 1</span><span class="named-paragraph-number">24.1.4.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">h</span><span class="plain-syntax"> < </span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax"> == -1)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax"> = </span><span class="identifier-syntax">h</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">coolest_L</span><span class="plain-syntax"> = </span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::restore_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax"> < </span><span class="constant-syntax">COLLISION_HEAT</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> == </span><span class="constant-syntax">CAP_ON_SLIDE_LENGTHS</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Optimal axis length for cut-exit is %d (heat %d), at cost %d.\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">coolest_L</span><span class="plain-syntax">, </span><span class="identifier-syntax">coolest_temperature</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">preslide_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">slide_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">preslide_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><span class="identifier-syntax">coolest_L</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP24_1_4_1" class="named-paragraph-link"><span class="named-paragraph">Displace zone 2 relative to zone 1</span><span class="named-paragraph-number">24.1.4.1</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24_1">§24.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP24_1_4_1" class="paragraph-anchor"></a><b>§24.1.4.1. </b>Here we slide rooms which came from Zone 2 so that they retain their
|
|
positions with respect to each other, and therefore to T1, and so that T1
|
|
is placed correctly aligned along the axis from F1 with length L.
|
|
</p>
|
|
|
|
<p class="commentary">Because there can never be locks across zone boundaries, this process
|
|
can't break a lock between two rooms.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Displace zone 2 relative to zone 1</span><span class="named-paragraph-number">24.1.4.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">div_dir1</span><span class="plain-syntax">] = </span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_scale</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">Axis</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">)));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Z2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">Z2</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Z2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z2_number</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::translate_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Z2</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP24_1_4">§24.1.4</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP25" class="paragraph-anchor"></a><b>§25. Finding how to divide. </b>That completes the logic for how we divide and conquer the submaps, except,
|
|
of course, that some of the critical steps weren't spelled out. We do that
|
|
now. First, the code to find good cutpoint(s): map connection(s) which, if
|
|
removed, would divide the submap efficiently. We prefer single cuts if
|
|
possible, but can live with double cuts; we want as evenly spread a
|
|
division as possible. (The "spread" is the difference in room count
|
|
of the larger zone compared to the smaller zone; we want to minimise this.)
|
|
</p>
|
|
|
|
<p class="commentary">Here is the basic idea. We will recursively spread a generation count out
|
|
into the submap, with the first room (<span class="extract"><span class="extract-syntax">first</span></span> below) belonging to generation 1.
|
|
We'll use the <span class="extract"><span class="extract-syntax">zone</span></span> field to store this, since it's an integer attached to
|
|
each room which isn't yet in use. <span class="extract"><span class="extract-syntax">SpatialMap::assign_generation_count</span></span> is recursively
|
|
called so that it visits each room exactly once, and increases the generation
|
|
on each call. Thus a line of rooms from <span class="extract"><span class="extract-syntax">first</span></span> would have generations 1, 2,
|
|
3, ... When <span class="extract"><span class="extract-syntax">SpatialMap::assign_generation_count</span></span> finds a connection from its current
|
|
position to a room with a lower generation, we say that there's a "contact".
|
|
</p>
|
|
|
|
<p class="commentary">What makes the function so effective is that it returns a great deal of data
|
|
about the high-spots of the history after it was called. The mechanism for
|
|
this, though, is that the caller has to set up a pile of arrays, and then
|
|
pass pointers to <span class="extract"><span class="extract-syntax">SpatialMap::assign_generation_count</span></span>; on its exit, the arrays are
|
|
then populated with answers.
|
|
</p>
|
|
|
|
<p class="commentary">This calculation runs in \(O(S)\) time, where \(S\) is the number of rooms in
|
|
the submap. It's guaranteed to find the optimal single cut, if one exists;
|
|
it's not guaranteed to find the optimal double cut — I suspect this is
|
|
not possible in \(O(S)\) running time, though possibly in \(O(S\log S)\) — but
|
|
in any case we have heuristic reasons why we don't always want the optimal
|
|
double cut. What can be said is that we at least try to find good spreads,
|
|
usually succeed in practice, and are guaranteed to find at least one double
|
|
cut if any exists.
|
|
</p>
|
|
|
|
<p class="commentary">The guarantees are void in a small number of cases where locks have been
|
|
applied: for instance, if the entire submap is locked together, nothing can
|
|
ever be cut. Should that happen, the user will find that the map-maker may
|
|
run slowly; it's his own fault.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> </span><span class="comment-syntax"> how much we keep track of</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax"> </span><span class="comment-syntax"> what's the best-known single link to cut?</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax"> </span><span class="comment-syntax"> what's the best-known pair of links equal in direction?</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax"> </span><span class="comment-syntax"> and in general?</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span><span class="plain-syntax"> </span><span class="comment-syntax"> a term to be explained below</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::work_out_optimal_cutpoint</span><button class="popup" onclick="togglePopup('usagePopup47')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup47">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::work_out_optimal_cutpoint</span></span>:<br/><a href="4-sm.html#SP24_1">§24.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">to</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">way</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">from2</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">to2</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">way2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">first</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">size</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP25_1" class="named-paragraph-link"><span class="named-paragraph">Find the size of and first room in the submap, and give all rooms generation 0</span><span class="named-paragraph-number">25.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">], *</span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">], *</span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">[</span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">];</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">outer_contact_generation</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">], </span><span class="identifier-syntax">outer_contact_dir</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">outer_contact_from</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">], *</span><span class="identifier-syntax">outer_contact_to</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP25_2" class="named-paragraph-link"><span class="named-paragraph">Initialise all this cutpoint search workspace</span><span class="named-paragraph-number">25.2</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP26" class="function-link"><span class="function-syntax">SpatialMap::assign_generation_count</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">first</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">size</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">outer_contact_generation</span><span class="plain-syntax">, </span><span class="identifier-syntax">outer_contact_from</span><span class="plain-syntax">, </span><span class="identifier-syntax">outer_contact_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">outer_contact_dir</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP25_3" class="named-paragraph-link"><span class="named-paragraph">Look at the results and return connections to cut, if any look good enough</span><span class="named-paragraph-number">25.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP25_1" class="paragraph-anchor"></a><b>§25.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Find the size of and first room in the submap, and give all rooms generation 0</span><span class="named-paragraph-number">25.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="comment-syntax"> i.e., not yet given a generation</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">size</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">first</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">size</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP25">§25</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP25_2" class="paragraph-anchor"></a><b>§25.2. </b>See below.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Initialise all this cutpoint search workspace</span><span class="named-paragraph-number">25.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">outer_contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">outer_contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">outer_contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">outer_contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax"> < </span><span class="constant-syntax">EXPLORATION_RECORDS</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">size</span><span class="plain-syntax">+1; </span><span class="comment-syntax"> an impossibly high value</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP25">§25</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP25_3" class="paragraph-anchor"></a><b>§25.3. </b>Suppose the larger and smaller zones have sizes \(X\) and \(Y\). Then clearly
|
|
\(X+Y = T\), where \(T\) is the total number of rooms (called <span class="extract"><span class="extract-syntax">size</span></span> below). The
|
|
spread is by definition \(S = X-Y\). Therefore the size of the smaller zone
|
|
is given by \(Y = (T-S)/2\). We use this to ensure that the division is worth
|
|
the time it takes.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MIN_ONECUT_ZONE_SIZE</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span>
|
|
<span class="definition-keyword">define</span> <span class="constant-syntax">MIN_TWOCUT_ZONE_SIZE</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Look at the results and return connections to cut, if any look good enough</span><span class="named-paragraph-number">25.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">size</span><span class="plain-syntax"> - </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">])/2 >= </span><span class="constant-syntax">MIN_ONECUT_ZONE_SIZE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">way</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">size</span><span class="plain-syntax"> - </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">])/2 >= </span><span class="constant-syntax">MIN_TWOCUT_ZONE_SIZE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">way</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">from2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">to2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">way2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">size</span><span class="plain-syntax"> - </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">])/2 >= </span><span class="constant-syntax">MIN_TWOCUT_ZONE_SIZE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">way</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">from2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">to2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">way2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP25">§25</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26" class="paragraph-anchor"></a><b>§26. </b>The return value of <span class="extract"><span class="extract-syntax">SpatialMap::assign_generation_count</span></span> is the number of rooms which
|
|
it, and its recursive incarnations, visit in total. But as noted above, it
|
|
also records data in the arrays it is passed pointers to; that's what the
|
|
last eleven arguments are for. Otherwise: <span class="extract"><span class="extract-syntax">at</span></span> is the room we are currently at,
|
|
and <span class="extract"><span class="extract-syntax">from</span></span> is the one we've just come from, or <span class="extract"><span class="extract-syntax">NULL</span></span> if this is the opening
|
|
call; <span class="extract"><span class="extract-syntax">size</span></span> is the number of rooms in the submap.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::assign_generation_count</span><button class="popup" onclick="togglePopup('usagePopup48')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup48">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::assign_generation_count</span></span>:<br/><a href="4-sm.html#SP25">§25</a>, <a href="4-sm.html#SP26_2">§26.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">size</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">contact_from</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">contact_to</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">contact_dir</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">generation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">locking_to_neighbours</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_1" class="named-paragraph-link"><span class="named-paragraph">Exclude generating this way if we don't need to</span><span class="named-paragraph-number">26.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2" class="named-paragraph-link"><span class="named-paragraph">Actually generate this way</span><span class="named-paragraph-number">26.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">locking_to_neighbours</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_1" class="named-paragraph-link"><span class="named-paragraph">Exclude generating this way if we don't need to</span><span class="named-paragraph-number">26.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2" class="named-paragraph-link"><span class="named-paragraph">Actually generate this way</span><span class="named-paragraph-number">26.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP26_1" class="paragraph-anchor"></a><b>§26.1. </b>We eliminate: routes from the current room to itself, or back the way
|
|
we just came to get here; routes to rooms with equal or higher generation
|
|
counts than the current one — those are places already visited; and
|
|
routes to rooms with lower generations — but those are contacts, so
|
|
we may need to record them before moving on.
|
|
</p>
|
|
|
|
<p class="commentary">What this leaves is cases where <span class="extract"><span class="extract-syntax">T_generation</span></span> is zero, that is, where
|
|
<span class="extract"><span class="extract-syntax">T</span></span> is a room with no generation count. This ensures <span class="extract"><span class="extract-syntax">SpatialMap::assign_generation_count</span></span>
|
|
is called at most once on each room.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Exclude generating this way if we don't need to</span><span class="named-paragraph-number">26.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">at</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">from</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">T_generation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T_generation</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">generation</span><span class="plain-syntax">) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T_generation</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T_generation</span><span class="plain-syntax"> < </span><span class="identifier-syntax">generation</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T_generation</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">observed_from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">observed_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">observed_dir</span><span class="plain-syntax"> = </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_1_1" class="named-paragraph-link"><span class="named-paragraph">Contact hasss been made</span><span class="named-paragraph-number">26.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26">§26</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2" class="paragraph-anchor"></a><b>§26.2. </b>At this point, it's as if we have been sent out to explore a labyrinth.
|
|
One problem we have is that we can't see what lies beyond here, with our
|
|
own eyes. "The underground rooms I can speak of only from report, because
|
|
the Egyptians in charge refused to let me see them, as they contain the
|
|
tombs of the kings who built the labyrinth, and also the tombs of the
|
|
sacred crocodiles" (Herodotus). So we must send out explorers who will
|
|
report back, but that costs us resources. "One doctrine called for
|
|
guarding every intersection such as this one. But I had already used two
|
|
men to guard our escape hole; if I left 10 per cent of my force at each
|
|
intersection, mighty soon I would be ten-percented to death" (Heinlein).
|
|
We must be careful of men, too: we can't afford to send out explorers
|
|
indefinitely because the running time and stack consumption would then be
|
|
prohibitive. The traditional approach is to unwind a ball of wool to avoid
|
|
going around in circles, but we'll instead use the generation counts — we
|
|
might imagine writing these on the ground everywhere we go.
|
|
</p>
|
|
|
|
<p class="commentary">So let us think of ourselves as dividing the party, and sending out a team of
|
|
explorers across the bridge from <span class="extract"><span class="extract-syntax">at</span></span> to <span class="extract"><span class="extract-syntax">T</span></span>, telling them to explore every
|
|
possible avenue, and record any contacts they make with the world we
|
|
already know about. We will wait here until they get back, and ask them how
|
|
many new places they managed to visit. Maybe there's a whole world over
|
|
there, maybe just a broom cupboard.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Actually generate this way</span><span class="named-paragraph-number">26.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">inner_contact_generation</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">], </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">], *</span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">[</span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2_1" class="named-paragraph-link"><span class="named-paragraph">Give the new team of explorers a fresh clipboard</span><span class="named-paragraph-number">26.2.1</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">generation</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rooms_explored_in_the_beyond</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP26" class="function-link"><span class="function-syntax">SpatialMap::assign_generation_count</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">size</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">, </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inner_contact_generation</span><span class="plain-syntax">, </span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">, </span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> += </span><span class="identifier-syntax">rooms_explored_in_the_beyond</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2_2" class="named-paragraph-link"><span class="named-paragraph">Copy interesting items from the returning team's clipboard to ours</span><span class="named-paragraph-number">26.2.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">locking_to_neighbours</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2_3" class="named-paragraph-link"><span class="named-paragraph">Consider this link as a potential cut-position</span><span class="named-paragraph-number">26.2.3</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26">§26</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2_1" class="paragraph-anchor"></a><b>§26.2.1. </b>Each fresh team of explorers gets a fresh clipboard on which to record what
|
|
they see — hence the new set of <span class="extract"><span class="extract-syntax">inner_contact_*</span></span> arrays. (They don't get
|
|
individual copies of the <span class="extract"><span class="extract-syntax">best_*</span></span> arrays, though — that's the point of these;
|
|
they're shared in common among all of the explorers.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Give the new team of explorers a fresh clipboard</span><span class="named-paragraph-number">26.2.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inner_contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = -1;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_2">§26.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2_2" class="paragraph-anchor"></a><b>§26.2.2. </b>When the explorers get back, tired but happy, we look at their clipboard,
|
|
and see if those contacts excite us too — which they may not, because what
|
|
seemed to them a rediscovery might not seem that way to us; they've seen
|
|
more of the world than we have. So we copy their contacts onto our own
|
|
clipboard only if they are contacts to places we know about, too.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Copy interesting items from the returning team's clipboard to ours</span><span class="named-paragraph-number">26.2.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">inner_contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax"> < </span><span class="identifier-syntax">generation</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">observed_from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">observed_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">observed_dir</span><span class="plain-syntax"> = </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_1_1" class="named-paragraph-link"><span class="named-paragraph">Contact hasss been made</span><span class="named-paragraph-number">26.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_2">§26.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2_3" class="paragraph-anchor"></a><b>§26.2.3. </b>Our clipboard contains a short list of observed contacts, sorted with
|
|
lowest observed generation first. (If more contacts are observed than will
|
|
fit on the clipboard, they're thrown away.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Consider this link as a potential cut-position</span><span class="named-paragraph-number">26.2.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_contacts_found</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">inner_contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_contacts_found</span><span class="plain-syntax">++;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_contacts_found</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">spread</span><span class="plain-syntax"> = </span><span class="identifier-syntax">size</span><span class="plain-syntax"> - </span><span class="constant-syntax">2</span><span class="plain-syntax">*</span><span class="identifier-syntax">rooms_explored_in_the_beyond</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">spread</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">spread</span><span class="plain-syntax"> = -</span><span class="identifier-syntax">spread</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_contacts_found</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2_3_1" class="named-paragraph-link"><span class="named-paragraph">Cutting on this link would disconnect the submap</span><span class="named-paragraph-number">26.2.3.1</span></a></span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_contacts_found</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP26_2_3_2" class="named-paragraph-link"><span class="named-paragraph">Cutting on this link and the contact found would disconnect the submap</span><span class="named-paragraph-number">26.2.3.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_2">§26.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2_3_1" class="paragraph-anchor"></a><b>§26.2.3.1. </b>If exploration outward from here never resulted in a contact with known
|
|
territory, then cutting this link strands the far side as a disconnected zone.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cutting on this link would disconnect the submap</span><span class="named-paragraph-number">26.2.3.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">spread</span><span class="plain-syntax"> < </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">]) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">] = </span><span class="identifier-syntax">spread</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">] = </span><span class="identifier-syntax">at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">] = </span><span class="identifier-syntax">T</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="constant-syntax">BEST_ONECUT_ER</span><span class="plain-syntax">] = </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_2_3">§26.2.3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_2_3_2" class="paragraph-anchor"></a><b>§26.2.3.2. </b>If exploration found just one contact, then that link, plus this one, would
|
|
if both removed cut off the far side. We have to be careful that we never
|
|
cut along locks, only along map connections; we know that the <span class="extract"><span class="extract-syntax">at</span></span> to <span class="extract"><span class="extract-syntax">T</span></span>
|
|
link isn't a lock, because we never come here in <span class="extract"><span class="extract-syntax">locking_to_neighbours</span></span>
|
|
mode. But we don't know that for the observed contact, so we check by hand.
|
|
</p>
|
|
|
|
<p class="commentary">The division is "parallel" if the two links are in the same or opposite
|
|
direction, like the two long tubes of a trombone; this makes it easier to
|
|
slide the zones to and fro without angular distortion, so we prefer it if
|
|
we can get it.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cutting on this link and the contact found would disconnect the submap</span><span class="named-paragraph-number">26.2.3.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">[0], </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[0], </span><span class="identifier-syntax">session</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> == </span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">[0]) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">r</span><span class="plain-syntax"> = </span><span class="constant-syntax">BEST_TWOCUT_ER</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[0] == </span><span class="identifier-syntax">i</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[0] == </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">r</span><span class="plain-syntax"> = </span><span class="constant-syntax">BEST_PARALLEL_TWOCUT_ER</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">spread</span><span class="plain-syntax"> < </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">]) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_spread</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">spread</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from1</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">at</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_to1</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">T</span><span class="plain-syntax">; </span><span class="identifier-syntax">best_dir1</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_from2</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">inner_contact_from</span><span class="plain-syntax">[0];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_to2</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">inner_contact_to</span><span class="plain-syntax">[0];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">best_dir2</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">inner_contact_dir</span><span class="plain-syntax">[0];</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_2_3">§26.2.3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP26_1_1" class="paragraph-anchor"></a><b>§26.1.1. </b>This is a piece of code used twice in the above function: it puts the
|
|
contact <span class="extract"><span class="extract-syntax">observed_from</span></span> to <span class="extract"><span class="extract-syntax">observed_to</span></span> onto our clipboard, provided that
|
|
there's room and/or it is interesting enough. We use an insertion-sort to
|
|
keep the clipboard in ascending generation order: this would be slow if the
|
|
contact arrays were large, but <span class="extract"><span class="extract-syntax">CLIPBOARD_SIZE</span></span> is tiny.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Contact hasss been made</span><span class="named-paragraph-number">26.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">k</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">k</span><span class="plain-syntax"> < </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">; </span><span class="identifier-syntax">k</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">] == -1) ||</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">])) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax"> = </span><span class="constant-syntax">CLIPBOARD_SIZE</span><span class="plain-syntax">-1; </span><span class="identifier-syntax">l</span><span class="plain-syntax"> > </span><span class="identifier-syntax">k</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">--) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">] = </span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">-1];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">] = </span><span class="identifier-syntax">contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">-1]; </span><span class="identifier-syntax">contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">] = </span><span class="identifier-syntax">contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">-1];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">] = </span><span class="identifier-syntax">contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">-1];</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_generation</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">] = </span><span class="identifier-syntax">observed_generation</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_from</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">] = </span><span class="identifier-syntax">observed_from</span><span class="plain-syntax">; </span><span class="identifier-syntax">contact_to</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">] = </span><span class="identifier-syntax">observed_to</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">contact_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">] = </span><span class="identifier-syntax">observed_dir</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP26_1">§26.1</a>, <a href="4-sm.html#SP26_2_2">§26.2.2</a>.</li></ul>
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|
<p class="commentary firstcommentary"><a id="SP27" class="paragraph-anchor"></a><b>§27. Zones 1 and 2 for a single cut. </b>Suppose we have decided to cut the submap between rooms <span class="extract"><span class="extract-syntax">R1</span></span> and <span class="extract"><span class="extract-syntax">R2</span></span>, in the
|
|
belief that this will disconnect the submap into two components. If that in
|
|
fact proves to be the case (as it always should) then we set the <span class="extract"><span class="extract-syntax">zone</span></span> field
|
|
to <span class="extract"><span class="extract-syntax">Z1</span></span> for all rooms in the R1 component, and <span class="extract"><span class="extract-syntax">Z2</span></span> on the R1 side. We set
|
|
<span class="extract"><span class="extract-syntax">Z1_count</span></span> and <span class="extract"><span class="extract-syntax">Z2_count</span></span> to the sizes of these components, and return <span class="extract"><span class="extract-syntax">TRUE</span></span>.
|
|
If, however, cutting does not disconnect the submap, then some mistake has
|
|
been made; we return <span class="extract"><span class="extract-syntax">FALSE</span></span> and the rest is undefined.
|
|
</p>
|
|
|
|
<p class="commentary">It is essential for <span class="extract"><span class="extract-syntax">Z1</span></span> and <span class="extract"><span class="extract-syntax">Z2</span></span> to be different. What we will do is to
|
|
spread out these zone values from <span class="extract"><span class="extract-syntax">R1</span></span> and <span class="extract"><span class="extract-syntax">R2</span></span> along all spatial
|
|
relationships not being cut; if this results in R2 being hit by the flood
|
|
from R1, or vice versa, then we're in the <span class="extract"><span class="extract-syntax">FALSE</span></span> case.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::divide_into_zones_onecut</span><button class="popup" onclick="togglePopup('usagePopup49')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup49">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::divide_into_zones_onecut</span></span>:<br/><a href="4-sm.html#SP24_1_2">§24.1.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z2</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">R2</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"can't divide"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">; </span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="identifier-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; *</span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">contacts</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP28" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_onecut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R1</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">R1</span><span class="plain-syntax">, </span><span class="identifier-syntax">R2</span><span class="plain-syntax">, &</span><span class="identifier-syntax">contacts</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">contacts</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> *</span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP28" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_onecut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="identifier-syntax">R1</span><span class="plain-syntax">, &</span><span class="identifier-syntax">contacts</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">R1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">Z2</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> ((*</span><span class="identifier-syntax">Z1_count</span><span class="plain-syntax">) > </span><span class="constant-syntax">1</span><span class="plain-syntax">) && ((*</span><span class="identifier-syntax">Z2_count</span><span class="plain-syntax">) > </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP28" class="paragraph-anchor"></a><b>§28. </b>And this is the recursive flooding function — essentially it's a much
|
|
simplified version of the exploration code above. <span class="extract"><span class="extract-syntax">from</span></span> is the room we're
|
|
currently at; <span class="extract"><span class="extract-syntax">zone_capital</span></span> is the one we started from, within our zone;
|
|
<span class="extract"><span class="extract-syntax">foreign_capital</span></span> is corresponding room of the other zone, so (a) we
|
|
mustn't travel on the direct route between the capitals — that's the line
|
|
which has been cut — and (b) we abandon the moment we find our zone
|
|
impinging on the foreign zone, because that means there's no way to divide
|
|
our original component into two disjoint connected zones.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::divide_into_zones_onecut_r</span><button class="popup" onclick="togglePopup('usagePopup50')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup50">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::divide_into_zones_onecut_r</span></span>:<br/><a href="4-sm.html#SP27">§27</a>, <a href="4-sm.html#SP28_1">§28.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">our_capital</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">foreign_capital</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">borders</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">our_zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP28_1" class="named-paragraph-link"><span class="named-paragraph">Consider whether to spread the zone to room T</span><span class="named-paragraph-number">28.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP28_1" class="named-paragraph-link"><span class="named-paragraph">Consider whether to spread the zone to room T</span><span class="named-paragraph-number">28.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP28_1" class="paragraph-anchor"></a><b>§28.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Consider whether to spread the zone to room T</span><span class="named-paragraph-number">28.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">T_zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">, </span><span class="identifier-syntax">foreign_zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">foreign_capital</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T_zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">our_zone</span><span class="plain-syntax">) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">our_capital</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">foreign_capital</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">foreign_capital</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">our_capital</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T_zone</span><span class="plain-syntax"> == </span><span class="identifier-syntax">foreign_zone</span><span class="plain-syntax">) { (*</span><span class="identifier-syntax">borders</span><span class="plain-syntax">)++; </span><span class="reserved-syntax">continue</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">our_zone</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">rooms_visited</span><span class="plain-syntax"> +=</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP28" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_onecut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">our_capital</span><span class="plain-syntax">, </span><span class="identifier-syntax">foreign_capital</span><span class="plain-syntax">, </span><span class="identifier-syntax">borders</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP28">§28</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP29" class="paragraph-anchor"></a><b>§29. Zones 1 and 2 for a double cut. </b>This is more or less the same, but simpler, since it can't determine whether
|
|
we've chosen the cuts correctly, so doesn't even try.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::divide_into_zones_twocut</span><button class="popup" onclick="togglePopup('usagePopup51')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup51">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::divide_into_zones_twocut</span></span>:<br/><a href="4-sm.html#SP24_1_2">§24.1.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">other_F</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z2</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z1</span><span class="plain-syntax">; </span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP30" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_twocut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">, </span><span class="identifier-syntax">other_F</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP30" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_twocut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_F1</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T1</span><span class="plain-syntax">, </span><span class="identifier-syntax">other_F</span><span class="plain-syntax">, </span><span class="identifier-syntax">div_T2</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP30" class="paragraph-anchor"></a><b>§30. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::divide_into_zones_twocut_r</span><button class="popup" onclick="togglePopup('usagePopup52')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup52">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::divide_into_zones_twocut_r</span></span>:<br/><a href="4-sm.html#SP29">§29</a>, <a href="4-sm.html#SP30_1">§30.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">not_X1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">not_Y1</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">not_X2</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">not_Y2</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">Z</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP30_1" class="named-paragraph-link"><span class="named-paragraph">Consider once again whether to spread the zone to room T</span><span class="named-paragraph-number">30.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP30_1" class="named-paragraph-link"><span class="named-paragraph">Consider once again whether to spread the zone to room T</span><span class="named-paragraph-number">30.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP30_1" class="paragraph-anchor"></a><b>§30.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Consider once again whether to spread the zone to room T</span><span class="named-paragraph-number">30.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax"> != </span><span class="identifier-syntax">at</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_X1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_Y1</span><span class="plain-syntax">)) || ((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_Y1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_X1</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_X2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_Y2</span><span class="plain-syntax">)) || ((</span><span class="identifier-syntax">at</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_Y2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">not_X2</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Z</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP30" class="function-link"><span class="function-syntax">SpatialMap::divide_into_zones_twocut_r</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_X1</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_Y1</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_X2</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_Y2</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP30">§30</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP31" class="paragraph-anchor"></a><b>§31. Tactics. </b>At long last we can forget about dividing submaps, and concentrate on the
|
|
four tactics for improving the layout of a given submap. We're going to do
|
|
all kinds of heuristic things here, some of them with iffy running times,
|
|
which is one reason why the above divide-and-conquer tricks were wise
|
|
(the other that divisions also reduce the complexity of the pieces we
|
|
need to work on).
|
|
</p>
|
|
|
|
<p class="commentary">We'll often experimentally change something, see what that does, then
|
|
change our minds. For really large-scale experimental changes to the grid
|
|
it's convenient to have a sort of global undo. Note that lock positions
|
|
after restoration must be consistent, since they were consistent at save
|
|
time.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::save_component_positions</span><button class="popup" onclick="togglePopup('usagePopup53')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup53">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::save_component_positions</span></span>:<br/><a href="4-sm.html#SP24_1_4">§24.1.4</a>, <a href="4-sm.html#SP32">§32</a>, <a href="4-sm.html#SP36_1">§36.1</a>, <a href="4-sm.html#SP38_1_1">§38.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">saved_gridpos</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::restore_component_positions</span><button class="popup" onclick="togglePopup('usagePopup54')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup54">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::restore_component_positions</span></span>:<br/><a href="4-sm.html#SP24_1_4">§24.1.4</a>, <a href="4-sm.html#SP32">§32</a>, <a href="4-sm.html#SP36_1">§36.1</a>, <a href="4-sm.html#SP38_1_1">§38.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">saved_gridpos</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP32" class="paragraph-anchor"></a><b>§32. The cooling tactic. </b>The whole universe was in a hot dense state: as we begin each component,
|
|
every room is at (0,0,0) unless locking causes it to offset slightly, so that
|
|
almost every exit is very hot indeed. We now enter the era of cooling,
|
|
when a great expansion occurs.
|
|
</p>
|
|
|
|
<p class="commentary">This is an iterative process, and if we ran this algorithm indefinitely it
|
|
would very likely lock up, continually moving rooms back and forth but never
|
|
solving its underlying geometric problems. So cooling may only continue so
|
|
long as component heat is strictly reduced on each round.
|
|
</p>
|
|
|
|
<p class="commentary">Cooling has the great virtue that each round runs in \(O(S)\) time, where \(S\)
|
|
is the number of rooms in the submap. It's quite hard to estimate the
|
|
total running time, but in practice the number of rounds seldom exceeds
|
|
3 or 4, even on quite bad maps, and because cooling is essentially a
|
|
local process there's no reason to expect the number of rounds to grow much
|
|
if \(S\) grows. So my guess is that cooling is \(O(S)\) in practice.
|
|
</p>
|
|
|
|
<p class="commentary">Another virtue is that cooling alone works in many easy cases. If there are
|
|
no locks, and no multiple exits between pairs of rooms A to B, then cooling
|
|
is guaranteed to find a perfect (heat 0) grid positioning if one exists.
|
|
There are plenty of Inform projects for which that happens: "Bronze",
|
|
for instance, has a single component of 55 rooms, and one round of cooling
|
|
reduces this to absolute zero.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::cool_submap</span><button class="popup" onclick="togglePopup('usagePopup55')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup55">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::cool_submap</span></span>:<br/><a href="4-sm.html#SP24">§24</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">), </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nTACTIC: Cooling submap %d: initial heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat_before_round</span><span class="plain-syntax"> = </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cooling round %d.\n"</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">rounds</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">cooled</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::save_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><a href="4-sm.html#SP33" class="function-link"><span class="function-syntax">SpatialMap::cool_component_from</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">heat_before_round</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::restore_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cooling round %d raised heat, so undone.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Cooling round %d leaves penalty %d.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat_before_round</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"Cooling submap %d done (%d round(s)): cooled by %d at cost of %d drognas\n\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">cooling_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP33" class="paragraph-anchor"></a><b>§33. </b>Cooling is done room by room within the component, but we get slightly
|
|
better results if it is allowed to spread through the component along exits
|
|
as they cool than if it is simply performed on the rooms in creation order.
|
|
Since the map likely contains circular routes, rooms are flagged so that they
|
|
can only be cooled once in a given round.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::cool_component_from</span><button class="popup" onclick="togglePopup('usagePopup56')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup56">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::cool_component_from</span></span>:<br/><a href="4-sm.html#SP32">§32</a>, <a href="4-sm.html#SP33_2">§33.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">cooled</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">cooled</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP33_1" class="named-paragraph-link"><span class="named-paragraph">Find the exits from this room and their current heats</span><span class="named-paragraph-number">33.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP33_2" class="named-paragraph-link"><span class="named-paragraph">Iteratively cool as many exits as possible</span><span class="named-paragraph-number">33.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP33_1" class="paragraph-anchor"></a><b>§33.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Find the exits from this room and their current heats</span><span class="named-paragraph-number">33.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><a href="4-sm.html#SP22" class="function-link"><span class="function-syntax">SpatialMap::find_exit_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP33">§33</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP33_2" class="paragraph-anchor"></a><b>§33.2. </b>An important point here is that we don't re-measure the heat of the exits
|
|
after cooling. If we did, we might find that cooling is having no effect, and
|
|
then lock up. We're simply trying to deal with the heat as it looked at the
|
|
start of the process; this means there are at most 12 iterations.
|
|
</p>
|
|
|
|
<p class="commentary">The reason we do this in what looks an indirect way (why iterate at all?) is
|
|
to cope better with cases where there are two different exits from R to S.
|
|
This frequently happens in IF maps:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>The Exalted Throne is above the Ziggurat. [...] South from the Throne is the Ziggurat.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">Now there are two exits from Z to E: up and north. They cannot simultaneously
|
|
be cooled. The rule we follow is that we never cool an exit if another exit
|
|
between the two rooms is already cold — this keeps us from endless flipping
|
|
our choice (up from Z to E on cooling round 1, then north on round 2, then up
|
|
on round 3, and so on).
|
|
</p>
|
|
|
|
<p class="commentary">However, it makes a big difference to the style of the map we produce which
|
|
choice we make. Because the code below tries the exits in direction number
|
|
order, and because lateral directions (N, NE, E, SE, S, SW, W, NW) have
|
|
lower direction numbers than vertical (U, D), the effect is to prefer lateral
|
|
choices over vertical ones. This is a good choice for two reasons: (i) given
|
|
the way we're going to plot the map on a web page, vertical offsets are
|
|
harder to judge by eye; and (ii) IF authors often use "both N and U"-style
|
|
connections to convey that the landscape isn't totally flat, but they're
|
|
still talking about a two-dimensional surface. (Cartographers have always
|
|
done this. The French map IGN 3535 OT, N\'evache-Mont Thabor, shows the
|
|
Rois Mages mountains as if you could walk southeast from Modane and take in
|
|
all three in an afternoon stroll.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Iteratively cool as many exits as possible</span><span class="named-paragraph-number">33.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">exits_cooled</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] == </span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">])) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">exits_cooled</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP34" class="function-link"><span class="function-syntax">SpatialMap::cool_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">exits_cooled</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP33" class="function-link"><span class="function-syntax">SpatialMap::cool_component_from</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">]);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] == </span><span class="identifier-syntax">exit_rooms</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">])) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">exit_heats</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">exits_cooled</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">exits_cooled</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP33">§33</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP34" class="paragraph-anchor"></a><b>§34. </b>To cool an exit is to move the destination room into the perfect grid
|
|
position so that the exit's heat is 0. Note that we must always maintain
|
|
locking, and that we provide a convenient "undo" mechanism in case the
|
|
result made matters worse. (Cooling one exit may simply make other exits
|
|
hotter, since the destination room falls out of alignment with its other
|
|
neighbours.)
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved_to</span><span class="plain-syntax">; </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Saved_position</span><span class="plain-syntax">;</span>
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::undo_cool_exit</span><button class="popup" onclick="togglePopup('usagePopup57')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup57">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::undo_cool_exit</span></span>:<br/><a href="4-sm.html#SP35_1">§35.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::move_room_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">saved_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">Saved_position</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Undoing move of %S\n"</span><span class="plain-syntax">, </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">saved_to</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::cool_exit</span><button class="popup" onclick="togglePopup('usagePopup58')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup58">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::cool_exit</span></span>:<br/><a href="4-sm.html#SP33_2">§33.2</a>, <a href="4-sm.html#SP35_1">§35.1</a>, <a href="4-sm.html#SP36_1">§36.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">saved_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">to</span><span class="plain-syntax">; </span><span class="identifier-syntax">Saved_position</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">length</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">exit</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_scale</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">length</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sg.html#SP6" class="function-link"><span class="function-syntax">Geometry::vec_eq</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">), </span><span class="identifier-syntax">N</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::move_room_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">saved_to</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Moving %S %s from %S: now at (%d,%d,%d)\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">), </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::find_icon_label</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">exit</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">N</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP35" class="paragraph-anchor"></a><b>§35. The quenching tactic. </b>After the age of cooling, we can expect the universe to be mostly cold, but
|
|
with local hot-spots where the geometry is distorted because the map is
|
|
simply awkward nearby. Because this tends to be a local problem, we try to
|
|
find a local solution — it's actually just individualised exit cooling.
|
|
</p>
|
|
|
|
<p class="commentary">This theoretically runs in \(O(S^3)\) time: note that the measurement of
|
|
submap heat is itself \(O(S)\), and we perform this inside a loop of \(O(S)\),
|
|
which in turn happens within a repetition which might run for every link
|
|
in the map, also \(O(S)\). In practice, there are never many quenching rounds,
|
|
so it's really "only" \(O(S^2)\). Still, this is why we don't want to quench
|
|
on large connected submaps.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::quench_submap</span><button class="popup" onclick="togglePopup('usagePopup59')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup59">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::quench_submap</span></span>:<br/><a href="4-sm.html#SP24_1_1">§24.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">avoid1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">avoid2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nTACTIC: Quenching submap %d: initial heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> < </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Quenching round %d begins with heat at %d.\n"</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">rounds</span><span class="plain-syntax">, </span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">successes</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP22" class="function-link"><span class="function-syntax">SpatialMap::find_exit_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP35_1" class="named-paragraph-link"><span class="named-paragraph">Attempt to quench this heated link</span><span class="named-paragraph-number">35.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Quenching round %d had %d success(es).\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">, </span><span class="identifier-syntax">successes</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Quenching submap %d done: cooled by %d at cost of %d drognas\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">quenching_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP35_1" class="paragraph-anchor"></a><b>§35.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Attempt to quench this heated link</span><span class="named-paragraph-number">35.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">avoid1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> == </span><span class="identifier-syntax">avoid2</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax"> == </span><span class="identifier-syntax">avoid2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> == </span><span class="identifier-syntax">avoid1</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Quenching %S %s to %S.\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::find_icon_label</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP34" class="function-link"><span class="function-syntax">SpatialMap::cool_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">h</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP34" class="function-link"><span class="function-syntax">SpatialMap::undo_cool_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Undoing: would have resulted in heat %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">h</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">h</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Accepting: reduces heat to %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">h</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">successes</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP35">§35</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP36" class="paragraph-anchor"></a><b>§36. The diffusion tactic. </b>Where quenching fails to help much, this is usually because rooms are packed
|
|
too tightly together, and need to be eased apart. This makes space for
|
|
more interesting configurations and makes it easier to get rid of the very
|
|
large collision heats, though the heat of some individual links actually
|
|
rises, since there's a penalty for increasing length.
|
|
</p>
|
|
|
|
<p class="commentary">We call this process diffusion, since the heat eddies away into the local
|
|
neighbourhood as the rooms shimmy apart.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::diffuse_submap</span><button class="popup" onclick="togglePopup('usagePopup60')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup60">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::diffuse_submap</span></span>:<br/><a href="4-sm.html#SP24_1_1">§24.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nTACTIC: Diffusing submap %d: initial heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> < </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Diffusion round %d with heat at %d.\n"</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">rounds</span><span class="plain-syntax">, </span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP36_1" class="named-paragraph-link"><span class="named-paragraph">Try diffusion along this link</span><span class="named-paragraph-number">36.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Diffusing submap %d done after %d round(s): "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"cooled by %d at cost of %d drognas\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">diffusion_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP36_1" class="paragraph-anchor"></a><b>§36.1. </b>Essentially we try lengthening the link by 1 unit, and see if that makes
|
|
things better; however, it tends to be useless just moving one room, because
|
|
that's very likely only moving a collision heat (let's say) one place down
|
|
the grid. So we move not only the room but also a whole clump of nearby
|
|
rooms whose exits are cold (or which are locked to each other).
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Try diffusion along this link</span><span class="named-paragraph-number">36.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> > -1) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Lengthening %S %s to %S to %d.\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::find_icon_label</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">), </span><span class="identifier-syntax">L</span><span class="plain-syntax">+1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::save_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">O</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">L</span><span class="plain-syntax">+1;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP34" class="function-link"><span class="function-syntax">SpatialMap::cool_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">O</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP37" class="function-link"><span class="function-syntax">SpatialMap::diffuse_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> != </span><span class="identifier-syntax">R</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::translate_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::restore_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exit_lengths</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Lengthening left heat undecreased at %d.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Lengthening reduced heat to %d.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP36">§36</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP37" class="paragraph-anchor"></a><b>§37. </b>This recursively expands zone 2 to include rooms connected by cold links,
|
|
except that it's forbidden to including <span class="extract"><span class="extract-syntax">avoiding</span></span> (the room we are trying
|
|
to lengthen away from).
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::diffuse_across</span><button class="popup" onclick="togglePopup('usagePopup61')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup61">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::diffuse_across</span></span>:<br/><a href="4-sm.html#SP36_1">§36.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><a href="4-sm.html#SP37" class="function-link"><span class="function-syntax">SpatialMap::diffuse_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> != </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP22" class="function-link"><span class="function-syntax">SpatialMap::find_exit_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP37" class="function-link"><span class="function-syntax">SpatialMap::diffuse_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP38" class="paragraph-anchor"></a><b>§38. The radiation tactic. </b>Here, we look for misaligned links, because they'll look broken to the eye,
|
|
and see if it's possible to slide a block of rooms in one of the compass
|
|
directions so that the link becomes aligned again.
|
|
</p>
|
|
|
|
<p class="commentary">This is such a neat trick, and so (relatively!) fast, that we apply it in
|
|
two circumstances: not only when tidying up after diffusion, but also after
|
|
we have rejoined a divided submap. (It's especially good for that because
|
|
after a two-point cut we often have a situation where one of the cut links
|
|
is put back tidily but the other is dislocated.)
|
|
</p>
|
|
|
|
<p class="commentary">It's hard to prove that radiation is rapid, because it certainly wouldn't be
|
|
if used earlier on. What saves us is that by now there are few misaligned
|
|
links.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::radiate_submap</span><button class="popup" onclick="togglePopup('usagePopup62')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup62">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::radiate_submap</span></span>:<br/><a href="4-sm.html#SP24_1">§24.1</a>, <a href="4-sm.html#SP24_1_1">§24.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nTACTIC: Radiating submap %d: initial heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> < </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Radiation round %d with heat at %d.\n"</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">rounds</span><span class="plain-syntax">, </span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">last_heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">T</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP23" class="function-link"><span class="function-syntax">SpatialMap::exit_aligned</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP38_1" class="named-paragraph-link"><span class="named-paragraph">Attempt to radiate from this misaligned link</span><span class="named-paragraph-number">38.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Radiating submap %d done after %d round(s): "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"cooled by %d at cost of %d drognas\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">radiation_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP38_1" class="paragraph-anchor"></a><b>§38.1. </b>We try some 40 possible translations of the R end of the link, hoping to
|
|
find that one or more of them will align with the T end. T will stay
|
|
fixed: note that by symmetry, if this doesn't work, we'll end up testing
|
|
the same link with the roles of R and T reversed later. Typically, there
|
|
are only three or four viable new positions for R.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MAX_RADIATION_DISTANCE</span><span class="plain-syntax"> </span><span class="constant-syntax">5</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Attempt to radiate from this misaligned link</span><span class="named-paragraph-number">38.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Map misaligned on %S %s to %S.\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><a href="4-sm.html#SP8_12" class="function-link"><span class="function-syntax">SpatialMap::find_icon_label</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">O</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">E</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_5" class="function-link"><span class="function-syntax">SpatialMap::direction_as_vector</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="identifier-syntax">L</span><span class="plain-syntax"> <= </span><span class="constant-syntax">MAX_RADIATION_DISTANCE</span><span class="plain-syntax">; </span><span class="identifier-syntax">L</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_scale</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="identifier-syntax">E</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP23" class="function-link"><span class="function-syntax">SpatialMap::exit_aligned</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP38_1_1" class="named-paragraph-link"><span class="named-paragraph">Radiation is geometrically possible here</span><span class="named-paragraph-number">38.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_1" class="function-link"><span class="function-syntax">SpatialMap::set_room_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">O</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Escape:</span><span class="plain-syntax"> ;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP38">§38</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP38_1_1" class="paragraph-anchor"></a><b>§38.1.1. </b>At this point setting this up is much the same as for diffusion:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Radiation is geometrically possible here</span><span class="named-paragraph-number">38.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Aligned at offset %d, %d, %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::save_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_27" class="function-link"><span class="function-syntax">SpatialMap::radiate_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">j</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> != </span><span class="identifier-syntax">R</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">, </span><span class="string-syntax">"Comoving %S\n"</span><span class="plain-syntax">, </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::translate_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">heat</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP31" class="function-link"><span class="function-syntax">SpatialMap::restore_component_positions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"Radiating left heat undecreased at %d.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP_WORKINGS</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"Radiating reduced heat to %d.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">goto</span><span class="plain-syntax"> </span><span class="identifier-syntax">Escape</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP38_1">§38.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_27" class="paragraph-anchor"></a><b>§8.27. </b>This is the clever part of radiation, and the reason why we only allow R
|
|
to radiate outward on cardinal points of the compass. Once again we will
|
|
move a whole clump of R's neighbours along with it, preserving their positions
|
|
relative to each other; but this time we define the boundary of the clump
|
|
by links in the radiation direction, or its opposite. The result is that
|
|
no exit can ever become misaligned during radiation; the only movements
|
|
happen parallel to the only links whose endpoints move with respect to each
|
|
other. (With just one exception, of course: the link between R and T,
|
|
where by construction the movement will make a previously unaligned link
|
|
become aligned.)
|
|
</p>
|
|
|
|
<p class="commentary">It follows that radiation can never increase the number of unaligned links.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::radiate_across</span><button class="popup" onclick="togglePopup('usagePopup63')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup63">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::radiate_across</span></span>:<br/><a href="4-sm.html#SP38_1_1">§38.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">not_this_way</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_this_way_either</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_6" class="function-link"><span class="function-syntax">SpatialMap::opposite</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">not_this_way</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP11" class="function-link"><span class="function-syntax">SpatialMap::read_slock</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_27" class="function-link"><span class="function-syntax">SpatialMap::radiate_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_this_way</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">T</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">zone</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">T</span><span class="plain-syntax"> != </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">) &&</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> != </span><span class="identifier-syntax">not_this_way</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> != </span><span class="identifier-syntax">not_this_way_either</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_27" class="function-link"><span class="function-syntax">SpatialMap::radiate_across</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">avoiding</span><span class="plain-syntax">, </span><span class="identifier-syntax">not_this_way</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_28" class="paragraph-anchor"></a><b>§8.28. The explosion tactic. </b>Sometimes, in the direst emergency, there's one tried and tested way to
|
|
get rid of a lot of concentrated heat: to explode. Specifically, we get
|
|
rid of collisions between rooms (which we absolutely forbid) by moving them
|
|
apart until there are no further collisions. We do this even if it should
|
|
increase the heat measure, though in practice the penalty for room collisions
|
|
is so high that this is unlikely to be an issue.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax"> </span><span class="constant-syntax">3</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::explode_submap</span><button class="popup" onclick="togglePopup('usagePopup64')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup64">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::explode_submap</span></span>:<br/><a href="4-sm.html#SP24_1_1">§24.1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"\nTACTIC: Exploding submap %d: initial heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">heat</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">keep_trying</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">moves</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">keep_trying</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">keep_trying</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">At</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP15" class="function-link"><span class="function-syntax">SpatialMap::occupied_in_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">At</span><span class="plain-syntax">) >= </span><span class="constant-syntax">2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Collision: pushing %S away\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">coldest</span><span class="plain-syntax"> = </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax"> = -</span><span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax"><=</span><span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax">; </span><span class="identifier-syntax">x</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">y</span><span class="plain-syntax"> = -</span><span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax"><=</span><span class="constant-syntax">MAX_EXPLOSION_DISTANCE</span><span class="plain-syntax">; </span><span class="identifier-syntax">y</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">x</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">y</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">V</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">At</span><span class="plain-syntax">, </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP15" class="function-link"><span class="function-syntax">SpatialMap::occupied_in_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">V</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::move_room_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">V</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">h</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">h</span><span class="plain-syntax"> < </span><span class="identifier-syntax">coldest</span><span class="plain-syntax">) { </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax"> = </span><span class="identifier-syntax">V</span><span class="plain-syntax">; </span><span class="identifier-syntax">coldest</span><span class="plain-syntax"> = </span><span class="identifier-syntax">h</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::move_room_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">At</span><span class="plain-syntax">, </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax">), </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Moving %S to blank offset (%d,%d,%d) for heat %d\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">Coldest</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">, </span><span class="identifier-syntax">coldest</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">keep_trying</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">moves</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP20" class="function-link"><span class="function-syntax">SpatialMap::find_submap_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Exploding submap %d done after %d move(s): "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"cooled by %d at cost of %d drognas\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">moves</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">initial_heat</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">explosion_spending</span><span class="plain-syntax"> += </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">drognas_spent</span><span class="plain-syntax"> - </span><span class="identifier-syntax">initial_spending</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_29" class="paragraph-anchor"></a><b>§8.29. Stage 3, positioning the components. </b>Having cooled and diffused each component, we now treat them as rigid
|
|
bodies, but still have to establish their spatial relationship to each
|
|
other. We ensure that the components do not overlap by the crude method of
|
|
making their bounding cuboids disjoint, even though this will often mean
|
|
that there is wasted space on the page. (Thus we do not, for instance, use
|
|
the trick adopted by the British Ordnance Survey in mapping the outlying
|
|
island of St Kilda on an inset square of what would otherwise be empty
|
|
ocean on OS18 "Sound of Harris", despite its being separated by about
|
|
60km from the position shown.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(4) Position the components in space</span><span class="named-paragraph-number">8.29</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ncom</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">ncom</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> **</span><span class="identifier-syntax">sorted</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">ncom</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *), </span><span class="constant-syntax">INDEX_SORTING_MREASON</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_2" class="named-paragraph-link"><span class="named-paragraph">Sort the components into decreasing order of size</span><span class="named-paragraph-number">8.29.2</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">previous_mc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_O</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Zero_vector</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">cuboid</span><span class="plain-syntax"> </span><span class="identifier-syntax">box</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">ncom</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sorted</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1" class="named-paragraph-link"><span class="named-paragraph">Position this map component in space</span><span class="named-paragraph-number">8.29.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax">=</span><span class="identifier-syntax">ncom</span><span class="plain-syntax">-1; </span><span class="identifier-syntax">j</span><span class="plain-syntax">>=0; </span><span class="identifier-syntax">j</span><span class="plain-syntax">--) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sorted</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="4-sm.html#SP42" class="function-link"><span class="function-syntax">SpatialMap::no_links_to_placed_components</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) == </span><span class="constant-syntax">1</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1" class="named-paragraph-link"><span class="named-paragraph">Position this map component in space</span><span class="named-paragraph-number">8.29.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Memory::I7_array_free</span><span class="plain-syntax">(</span><span class="identifier-syntax">sorted</span><span class="plain-syntax">, </span><span class="constant-syntax">INDEX_SORTING_MREASON</span><span class="plain-syntax">, </span><span class="identifier-syntax">ncom</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_29_1" class="paragraph-anchor"></a><b>§8.29.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Position this map component in space</span><span class="named-paragraph-number">8.29.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">previous_mc</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">x_max</span><span class="plain-syntax"> = </span><span class="identifier-syntax">box</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) && (</span><a href="4-sm.html#SP40" class="function-link"><span class="function-syntax">SpatialMap::component_is_isolated</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1_2" class="named-paragraph-link"><span class="named-paragraph">Use the drill-square strategy to place this component</span><span class="named-paragraph-number">8.29.1.2</span></a></span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP40" class="function-link"><span class="function-syntax">SpatialMap::component_is_adjoining</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1_3" class="named-paragraph-link"><span class="named-paragraph">Use the optimised inset strategy to place this component</span><span class="named-paragraph-number">8.29.1.3</span></a></span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1_1" class="named-paragraph-link"><span class="named-paragraph">Use the side-by-side strategy to place this component</span><span class="named-paragraph-number">8.29.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP11" class="function-link"><span class="function-syntax">Geometry::merge_cuboid</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">box</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">previous_mc</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29">§8.29</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_29_1_1" class="paragraph-anchor"></a><b>§8.29.1.1. </b>Here we simply place the component immediately to the right of its
|
|
predecessor, with the same baseline, and on the level of the benchmark room.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Use the side-by-side strategy to place this component</span><span class="named-paragraph-number">8.29.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Component %d (size %d): side by side strategy\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_18" class="function-link"><span class="function-syntax">SpatialMap::move_component</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x_max</span><span class="plain-syntax">, </span><span class="identifier-syntax">box</span><span class="plain-syntax">.</span><span class="identifier-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP4" class="function-link"><span class="function-syntax">SpatialMap::benchmark_level</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">) - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29_1">§8.29.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_29_1_2" class="paragraph-anchor"></a><b>§8.29.1.2. </b>The drill square is a way to place large numbers of single-room components,
|
|
such as exist in IF works where rooms are being plaited together live during
|
|
play and have no initial map. Side-by-side placement would be horrible for
|
|
such rooms. We will form the most nearly square rectangle which can hold
|
|
them, arranged so that it's slightly wider than it is tall. In effect, this
|
|
rectangle — the "drill square" — is then placed side-by-side as if it's
|
|
one big component.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Use the drill-square strategy to place this component</span><span class="named-paragraph-number">8.29.1.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Component %d (size %d): drill square strategy\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_O</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">box</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">box</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP4" class="function-link"><span class="function-syntax">SpatialMap::benchmark_level</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Drill_square_O</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sing</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sing</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">sing</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) && (</span><a href="4-sm.html#SP40" class="function-link"><span class="function-syntax">SpatialMap::component_is_isolated</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sing</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">*</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax"> < </span><span class="identifier-syntax">N</span><span class="plain-syntax">) </span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">*</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax"> > </span><span class="identifier-syntax">N</span><span class="plain-syntax">) </span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Drill square: side %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_18" class="function-link"><span class="function-syntax">SpatialMap::move_component</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax">, </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(0, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">Drill_square_O</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> == </span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Drill_square_At</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(1, -</span><span class="identifier-syntax">drill_square_side</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29_1">§8.29.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_29_1_3" class="paragraph-anchor"></a><b>§8.29.1.3. </b>Insetting is used if our new component has a map connection in the IN or
|
|
OUT directions with an already-placed component; if we can, we want to place
|
|
the new component into the map as close as possible to the room it connects
|
|
with.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Use the optimised inset strategy to place this component</span><span class="named-paragraph-number">8.29.1.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"Component %d (size %d): optimised inset strategy\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">outer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">inner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP42" class="function-link"><span class="function-syntax">SpatialMap::find_link_to_placed_components</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, &</span><span class="identifier-syntax">outer</span><span class="plain-syntax">, &</span><span class="identifier-syntax">inner</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Best_offset</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">x_max</span><span class="plain-syntax">, </span><span class="identifier-syntax">box</span><span class="plain-syntax">.</span><span class="identifier-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP4" class="function-link"><span class="function-syntax">SpatialMap::benchmark_level</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">) - </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">outer</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">inner</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dx</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">dy</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">dz</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">min_s</span><span class="plain-syntax"> = </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dx</span><span class="plain-syntax"> = -</span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dx</span><span class="plain-syntax"> <= </span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dx</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dy</span><span class="plain-syntax"> = -</span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dy</span><span class="plain-syntax"> <= </span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dy</span><span class="plain-syntax">++)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dz</span><span class="plain-syntax"> = -</span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dz</span><span class="plain-syntax"> <= </span><span class="constant-syntax">MAX_OFFSET</span><span class="plain-syntax">; </span><span class="identifier-syntax">dz</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">dx</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">dy</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">dz</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">Offset</span><span class="plain-syntax"> =</span>
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|
<span class="plain-syntax"> </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_plus</span></a><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">outer</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">inner</span><span class="plain-syntax">)),</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP5" class="function-link"><span class="function-syntax">Geometry::vec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dx</span><span class="plain-syntax">, </span><span class="identifier-syntax">dy</span><span class="plain-syntax">, </span><span class="identifier-syntax">dz</span><span class="plain-syntax">));</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP8_29_1_3_1" class="named-paragraph-link"><span class="named-paragraph">Try this possible offset component position</span><span class="named-paragraph-number">8.29.1.3.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_18" class="function-link"><span class="function-syntax">SpatialMap::move_component</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">Best_offset</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29_1">§8.29.1</a>.</li></ul>
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|
<p class="commentary firstcommentary"><a id="SP8_29_1_3_1" class="paragraph-anchor"></a><b>§8.29.1.3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Try this possible offset component position</span><span class="named-paragraph-number">8.29.1.3.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_18" class="function-link"><span class="function-syntax">SpatialMap::move_component</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">Offset</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">s</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP41" class="function-link"><span class="function-syntax">SpatialMap::find_component_placement_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">s</span><span class="plain-syntax"> < </span><span class="identifier-syntax">min_s</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">min_s</span><span class="plain-syntax"> = </span><span class="identifier-syntax">s</span><span class="plain-syntax">; </span><span class="identifier-syntax">Best_offset</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Offset</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_18" class="function-link"><span class="function-syntax">SpatialMap::move_component</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_negate</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Offset</span><span class="plain-syntax">));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29_1_3">§8.29.1.3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_29_2" class="paragraph-anchor"></a><b>§8.29.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Sort the components into decreasing order of size</span><span class="named-paragraph-number">8.29.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="identifier-syntax">sorted</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">qsort</span><span class="plain-syntax">(</span><span class="identifier-syntax">sorted</span><span class="plain-syntax">, (</span><span class="identifier-syntax">size_t</span><span class="plain-syntax">) </span><span class="identifier-syntax">ncom</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *), </span><a href="4-sm.html#SP39" class="function-link"><span class="function-syntax">SpatialMap::compare_components</span></a><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8_29">§8.29</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP39" class="paragraph-anchor"></a><b>§39. </b>The following means the components are sorted in descending size order,
|
|
but in order of creation within each size; when we get down to the
|
|
singletons, we sort by order of creation of the single rooms they
|
|
contain.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::compare_components</span><button class="popup" onclick="togglePopup('usagePopup65')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup65">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::compare_components</span></span>:<br/><a href="4-sm.html#SP8_29_2">§8.29.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ent1</span><span class="plain-syntax">, </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ent2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mc1</span><span class="plain-syntax"> = *((</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">ent1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mc2</span><span class="plain-syntax"> = *((</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">ent2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mc2</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax"> - </span><span class="identifier-syntax">mc1</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">d</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">mc1</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mc1</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_room_in_submap</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mc2</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_room_in_submap</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">R1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R2</span><span class="plain-syntax">)) { </span><span class="comment-syntax"> which should always happen, but just in case of an error</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">reg1</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::region_of</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">reg2</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::region_of</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">reg1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">reg2</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> -1;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">reg1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">reg2</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">reg1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax"> = </span><span class="identifier-syntax">reg1</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax"> - </span><span class="identifier-syntax">reg2</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">d</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R1</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax"> - </span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">d</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">mc1</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax"> - </span><span class="identifier-syntax">mc2</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP40" class="paragraph-anchor"></a><b>§40. </b>We should define what we mean by "adjoining" and "isolated". The first
|
|
means it has a link (which must be IN or OUT) to an already-positioned
|
|
component; the second means it has no link at all to any other component.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::component_is_adjoining</span><button class="popup" onclick="togglePopup('usagePopup66')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup66">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::component_is_adjoining</span></span>:<br/><a href="4-sm.html#SP8_29_1">§8.29.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP42" class="function-link"><span class="function-syntax">SpatialMap::no_links_to_placed_components</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::component_is_isolated</span><button class="popup" onclick="togglePopup('usagePopup67')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup67">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::component_is_isolated</span></span>:<br/><a href="4-sm.html#SP8_29_1">§8.29.1</a>, <a href="4-sm.html#SP8_29_1_2">§8.29.1.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP42" class="function-link"><span class="function-syntax">SpatialMap::no_links_to_other_components</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP41" class="paragraph-anchor"></a><b>§41. </b>In theory this has \(O(R^2)\) running time, but it's very unlikely that there
|
|
are \(R\) components of size 1, so in practice it's much better than that.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_component_placement_heat</span><button class="popup" onclick="togglePopup('usagePopup68')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup68">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_component_placement_heat</span></span>:<br/><a href="4-sm.html#SP8_29_1_3_1">§8.29.1.3.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">other</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">other</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">other</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP15" class="function-link"><span class="function-syntax">SpatialMap::occupied_in_submap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">other</span><span class="plain-syntax">, </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP42" class="function-link"><span class="function-syntax">SpatialMap::find_cross_component_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> >= </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax">) </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="constant-syntax">FUSION_POINT</span><span class="plain-syntax"> - </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP42" class="paragraph-anchor"></a><b>§42. </b>Where:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_cross_component_heat</span><button class="popup" onclick="togglePopup('usagePopup69')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup69">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_cross_component_heat</span></span>:<br/><a href="4-sm.html#SP41">§41</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP43" class="function-link"><span class="function-syntax">SpatialMap::cross_component_links</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, &</span><span class="identifier-syntax">heat</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">heat</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_link_to_placed_components</span><button class="popup" onclick="togglePopup('usagePopup70')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup70">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_link_to_placed_components</span></span>:<br/><a href="4-sm.html#SP8_29_1_3">§8.29.1.3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">outer</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">inner</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP43" class="function-link"><span class="function-syntax">SpatialMap::cross_component_links</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">outer</span><span class="plain-syntax">, </span><span class="identifier-syntax">inner</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::no_links_to_placed_components</span><button class="popup" onclick="togglePopup('usagePopup71')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup71">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::no_links_to_placed_components</span></span>:<br/><a href="4-sm.html#SP8_29">§8.29</a>, <a href="4-sm.html#SP40">§40</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-sm.html#SP43" class="function-link"><span class="function-syntax">SpatialMap::cross_component_links</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::no_links_to_other_components</span><button class="popup" onclick="togglePopup('usagePopup72')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup72">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::no_links_to_other_components</span></span>:<br/><a href="4-sm.html#SP40">§40</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-sm.html#SP43" class="function-link"><span class="function-syntax">SpatialMap::cross_component_links</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP43" class="paragraph-anchor"></a><b>§43. </b>So, now we have to define our Swiss-army-knife function to cope with all
|
|
these requirements. We not only count non-lattice connections to other
|
|
components (IN and OUT links, basically), but also score how bad they are,
|
|
if requested, and record the first we find, if requested.
|
|
</p>
|
|
|
|
<p class="commentary">There can't be any lattice connections to other components, because two
|
|
rooms connected that way are by definition in the same component.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::cross_component_links</span><button class="popup" onclick="togglePopup('usagePopup73')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup73">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::cross_component_links</span></span>:<br/><a href="4-sm.html#SP42">§42</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">outer</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">inner</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">heat</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">posnd</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">for_session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_links</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax">) *</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_NONLATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">d</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R2</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap_cross</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">d</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">R2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> != </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">posnd</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_links</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">inner</span><span class="plain-syntax">) *</span><span class="identifier-syntax">inner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">; </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">outer</span><span class="plain-syntax">) *</span><span class="identifier-syntax">outer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax">) *</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">heat</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_30" class="function-link"><span class="function-syntax">SpatialMap::find_cross_link_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="identifier-syntax">d</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">posnd</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_NONLATTICE_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">d</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R2</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP10" class="function-link"><span class="function-syntax">SpatialMap::read_smap_cross</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">d</span><span class="plain-syntax">, </span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">R2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">R2</span><span class="plain-syntax">-></span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax"> == </span><span class="identifier-syntax">sub</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_links</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">outer</span><span class="plain-syntax">) *</span><span class="identifier-syntax">outer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">S</span><span class="plain-syntax">; </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">inner</span><span class="plain-syntax">) *</span><span class="identifier-syntax">inner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax">) *</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">heat</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_30" class="function-link"><span class="function-syntax">SpatialMap::find_cross_link_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">R2</span><span class="plain-syntax">, </span><span class="identifier-syntax">d</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_links</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-sm.html#SP43_1" class="named-paragraph-link"><span class="named-paragraph">Look for van der Waals forces</span><span class="named-paragraph-number">43.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_links</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP43_1" class="paragraph-anchor"></a><b>§43.1. </b>When there are no map connections or locks, there may still be a very weak
|
|
bond between rooms simply because they belong to the same region. We only
|
|
look at these weak bonds for singleton regions, for simplicity and to keep
|
|
running time in check.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Look for van der Waals forces</span><span class="named-paragraph-number">43.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">first_room_in_submap</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">) { </span><span class="comment-syntax"> which should always happen, but just in case of an error</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">reg</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::region_of</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">reg</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">, *</span><span class="identifier-syntax">closest_S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">closest</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">)</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax"> != </span><span class="identifier-syntax">R</span><span class="plain-syntax">) && (</span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::region_of</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">) == </span><span class="identifier-syntax">reg</span><span class="plain-syntax">))</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">posnd</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">submap</span><span class="plain-syntax">-></span><span class="element-syntax">positioned</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">diff</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">*(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax"> - </span><span class="identifier-syntax">S</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">diff</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">diff</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">-</span><span class="identifier-syntax">diff</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">closest_S</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">diff</span><span class="plain-syntax"> < </span><span class="identifier-syntax">closest</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">closest</span><span class="plain-syntax"> = </span><span class="identifier-syntax">diff</span><span class="plain-syntax">; </span><span class="identifier-syntax">closest_S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">S</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">closest_S</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SPATIAL_MAP</span><span class="plain-syntax">, </span><span class="string-syntax">"vdW force between %S and %S\n"</span><span class="plain-syntax">,</span>
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|
<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">closest_S</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_links</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">outer</span><span class="plain-syntax">) *</span><span class="identifier-syntax">outer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">closest_S</span><span class="plain-syntax">; </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">inner</span><span class="plain-syntax">) *</span><span class="identifier-syntax">inner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">heat</span><span class="plain-syntax">) *</span><span class="identifier-syntax">heat</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP19" class="function-link"><span class="function-syntax">SpatialMap::heat_sum</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">heat</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_30" class="function-link"><span class="function-syntax">SpatialMap::find_cross_link_heat</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">closest_S</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="constant-syntax">3</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP43">§43</a>.</li></ul>
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|
<p class="commentary firstcommentary"><a id="SP8_30" class="paragraph-anchor"></a><b>§8.30. </b>"How bad they are" uses another heat-like measure. This one gives an
|
|
enormous penalty for being wrong vertically; people just don't like
|
|
reading maps where an inside room is displayed on the floor above or below.
|
|
It also gives preference to the green jagged arrow directions when placing
|
|
insets — this makes the map line up elegantly.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::find_cross_link_heat</span><button class="popup" onclick="togglePopup('usagePopup74')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup74">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::find_cross_link_heat</span></span>:<br/><a href="4-sm.html#SP43">§43</a>, <a href="4-sm.html#SP43_1">§43.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">R</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">S</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"bad room distance"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-sm.html#SP8_30" class="function-link"><span class="function-syntax">SpatialMap::component_metric</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">), </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">), </span><span class="identifier-syntax">dir</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::component_metric</span><span class="plain-syntax">(</span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P1</span><span class="plain-syntax">, </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">P2</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dir</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP7" class="function-link"><span class="function-syntax">Geometry::vec_minus</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P1</span><span class="plain-syntax">, </span><span class="identifier-syntax">P2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">b</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">dir</span><span class="plain-syntax"> == </span><span class="constant-syntax">10</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">dir</span><span class="plain-syntax"> == </span><span class="constant-syntax">11</span><span class="plain-syntax">)) { </span><span class="comment-syntax"> IN and OUT respectively</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dir</span><span class="plain-syntax"> == </span><span class="constant-syntax">11</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax"> = -</span><span class="identifier-syntax">b</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">b</span><span class="plain-syntax"> += </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dir</span><span class="plain-syntax"> == </span><span class="constant-syntax">3</span><span class="plain-syntax">) { </span><span class="comment-syntax"> SOUTH, the notional direction for van der Waals forces</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">b</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">b</span><span class="plain-syntax"> += </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span><span class="plain-syntax">*</span><span class="identifier-syntax">b</span><span class="plain-syntax"> + </span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">*</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax"> + </span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">*</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax"> + </span><span class="constant-syntax">100</span><span class="plain-syntax">*</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">*</span><span class="identifier-syntax">D</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_31" class="paragraph-anchor"></a><b>§8.31. Stage 5, bounding the universe. </b>Short and sweet. We make <span class="extract"><span class="extract-syntax">Universe</span></span> the minimal-sized cuboid containing each room.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(5) Find the universal bounding cuboid</span><span class="named-paragraph-number">8.31</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">Universe</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::empty_cuboid</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sg.html#SP10" class="function-link"><span class="function-syntax">Geometry::adjust_cuboid</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">Universe</span><span class="plain-syntax">, </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP8_32" class="paragraph-anchor"></a><b>§8.32. Stage 6, removing blank planes. </b>We need to avoid what might be an infinite loop in awkward cases where
|
|
locking means that blank planes are inevitable.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">(6) Remove any blank lateral planes</span><span class="named-paragraph-number">8.32</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">safety_count</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NUMBER_CREATED</span><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">safety_count</span><span class="plain-syntax">-- >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">blank_z</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">blank_plane_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">z</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">z</span><span class="plain-syntax"> = </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">Universe</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax"> - </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">z</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">session</span><span class="plain-syntax">-></span><span class="element-syntax">calc</span><span class="plain-syntax">.</span><span class="element-syntax">Universe</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax"> + </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="identifier-syntax">z</span><span class="plain-syntax">--) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">occupied</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">).</span><span class="identifier-syntax">z</span><span class="plain-syntax"> == </span><span class="identifier-syntax">z</span><span class="plain-syntax">) </span><span class="identifier-syntax">occupied</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">occupied</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">blank_z</span><span class="plain-syntax"> = </span><span class="identifier-syntax">z</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">blank_plane_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">blank_plane_found</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_ROOMS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">).</span><span class="identifier-syntax">z</span><span class="plain-syntax"> > </span><span class="identifier-syntax">blank_z</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-sm.html#SP8_23" class="function-link"><span class="function-syntax">SpatialMap::translate_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">D_vector</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-sm.html#SP8">§8</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP44" class="paragraph-anchor"></a><b>§44. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::index_room_connections</span><button class="popup" onclick="togglePopup('usagePopup75')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup75">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::index_room_connections</span></span>:<br/>Map Element - <a href="3-me.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">RW</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">); </span><span class="comment-syntax"> name of the origin room</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP8" class="function-link"><span class="function-syntax">Indexing::get_set_of_instances</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">dir</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">dir</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="identifier-syntax">dir</span><span class="plain-syntax">-></span><span class="element-syntax">direction_index</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">opp</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::opposite_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dir</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">od</span><span class="plain-syntax"> = </span><span class="identifier-syntax">opp</span><span class="plain-syntax">?(</span><span class="identifier-syntax">opp</span><span class="plain-syntax">-></span><span class="element-syntax">direction_index</span><span class="plain-syntax">):(-1);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, &</span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">D</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::open_indented_p</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="string-syntax">"tight"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">icon</span><span class="plain-syntax"> = </span><span class="string-syntax">"e_arrow"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">D</span><span class="plain-syntax">)) </span><span class="identifier-syntax">icon</span><span class="plain-syntax"> = </span><span class="string-syntax">"e_arrow_door"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">) </span><span class="identifier-syntax">icon</span><span class="plain-syntax"> = </span><span class="string-syntax">"e_arrow_door_blocked"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_TAG_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"img"</span><span class="plain-syntax">, </span><span class="string-syntax">"border=0 src=inform:/map_icons/%s.png"</span><span class="plain-syntax">, </span><span class="identifier-syntax">icon</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&nbsp;"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">dir</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" to "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">D</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" via "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" (a door)"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">S</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">opp</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">B</span><span class="plain-syntax"> = </span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">od</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">B</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" (but "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">opp</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" from "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" is nowhere)"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">B</span><span class="plain-syntax"> != </span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" (but "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">opp</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" from "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" is "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">B</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-></span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exits_set_at</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">at</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="2-iu.html#SP2" class="function-link"><span class="function-syntax">IndexUtilities::link</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">at</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
|
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<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_DIRECTIONS</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">dir</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> = </span><span class="identifier-syntax">dir</span><span class="plain-syntax">-></span><span class="element-syntax">direction_index</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-sm.html#SP8_13" class="function-link"><span class="function-syntax">SpatialMap::room_exit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">k</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::open_indented_p</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="string-syntax">"hanging"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"<i>add:</i> "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"; "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">DW</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::get_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">dir</span><span class="plain-syntax">); </span><span class="comment-syntax"> name of the direction</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">DW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Str::put_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">Characters::toupper</span><span class="plain-syntax">(</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">)));</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">" from "</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">RW</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">RW</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">"here"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">, </span><span class="string-syntax">" is .[=0x000A=]"</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">PasteButtons::paste_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">TEMP</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&nbsp;%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">DW</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">k</span><span class="plain-syntax">>0) </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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<p class="commentary firstcommentary"><a id="SP45" class="paragraph-anchor"></a><b>§45. Unit testing. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">SpatialMap::perform_map_internal_test</span><button class="popup" onclick="togglePopup('usagePopup76')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup76">Usage of <span class="code-font"><span class="function-syntax">SpatialMap::perform_map_internal_test</span></span>:<br/>Map Element - <a href="3-me.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="reserved-syntax">index_session</span><span class="plain-syntax"> *</span><span class="identifier-syntax">session</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">LS</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_submaps</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAPS</span><span class="plain-syntax">(</span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"Map component %d: extent (%d...%d, %d...%d, %d...%d): population %d\n"</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="element-syntax">x</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner0</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">corner1</span><span class="plain-syntax">.</span><span class="identifier-syntax">z</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sub</span><span class="plain-syntax">-></span><span class="element-syntax">bounds</span><span class="plain-syntax">.</span><span class="element-syntax">population</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_SUBMAP</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">sub</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%3d, %3d, %3d: "</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">).</span><span class="identifier-syntax">x</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">).</span><span class="identifier-syntax">y</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Room_position</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">).</span><span class="identifier-syntax">z</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::write_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax"> == </span><a href="2-fi.html#SP11" class="function-link"><span class="function-syntax">FauxInstances::benchmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</span><span class="plain-syntax">)) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" (benchmark)"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\n"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\n"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax">}</span>
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</pre>
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