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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../intern.html">Inter Modules</a></li><li><a href="index.html">index</a></li><li><a href="index.html#2">Chapter 2: Utilities</a></li><li><b>Faux Instances</b></li></ul></div>
<p class="purpose">Some of the more complicated indexing tasks need to build data structures cross-referencing the instance packages in the Inter tree: the spatial map, in particular. For convenience, we create faux-instance objects for them, which partly correspond to the instance objects in the original compiler.</p>
<ul class="toc"><li><a href="2-fi.html#SP5">&#167;5. Sets</a></li><li><a href="2-fi.html#SP10">&#167;10. Decoding map hints</a></li><li><a href="2-fi.html#SP11">&#167;11. Instance set properties</a></li><li><a href="2-fi.html#SP13">&#167;13. Individual instance properties</a></li><li><a href="2-fi.html#SP14">&#167;14. Appearance counts</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b>The data structure <a href="2-fi.html#SP1" class="internal">faux_instance</a> consists mostly of cross-references
to other faux instances, and is paraphrased directly from the Inter tree:
</p>
<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">faux_instance</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">package</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">index_appearances</span><span class="plain-syntax">; </span><span class="comment-syntax"> how many times have I appeared thus far in the World index?</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">name</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">printed_name</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">abbrev</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">direction_index</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">backdrop_presences</span><span class="plain-syntax">; </span><span class="comment-syntax"> of </span><span class="extract"><span class="extract-syntax">faux_instance</span></span>
<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">region_enclosing</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">next_room_in_submap</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">opposite_direction</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">object_tree_sibling</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">object_tree_child</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">progenitor</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">incorp_tree_sibling</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">incorp_tree_child</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">other_side</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_text</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_chain</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">anchor_text</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">fi_map_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure faux_instance is accessed in 3/me, 4/mc, 4/sm, 4/rhm, 4/rem and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>The following function creates a basic <a href="2-fi.html#SP1" class="internal">faux_instance</a> corresponding to
the package <span class="extract"><span class="extract-syntax">pack</span></span>, but one in which none of the cross-references to other
FIs are present: those can only be made once all of the basic FIs have been
created.
</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">FauxInstances::new</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">FauxInstances::new</span></span>:<br/><a href="2-fi.html#SP8_1">&#167;8.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</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">I</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</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="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">index_appearances</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pack</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">Metadata::required_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^name"</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">printed_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">Metadata::required_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^printed_name"</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">abbrev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">Metadata::required_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^abbreviation"</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">Metadata::required_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^index_kind"</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_chain</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">Metadata::required_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^index_kind_chain"</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">other_side</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">direction_index</span><span class="plain-syntax"> = -1;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">backdrop_presences</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NEW_LINKED_LIST</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="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">region_enclosing</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">I</span><span class="plain-syntax">-&gt;</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><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">opposite_direction</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_sibling</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_child</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">progenitor</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_sibling</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_child</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">anchor_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">anchor_text</span><span class="plain-syntax">, </span><span class="string-syntax">"fi%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP4" class="function-link"><span class="function-syntax">FauxInstances::new_fimd</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">return</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="SP3" class="paragraph-anchor"></a><b>&#167;3. </b>Though the FI structure mostly paraphrases data in the Inter tree which in
turn paraphrases data structures in the Inform compiler, it also contains
an <a href="2-fi.html#SP3" class="internal">fi_map_data</a> structure which is more novel, and is used when making
the World map.
</p>
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MAX_DIRECTIONS</span><span class="plain-syntax"> </span><span class="constant-syntax">100</span><span class="plain-syntax"> </span><span class="comment-syntax"> the Standard Rules define only 12, so this is plenty</span>
</pre>
<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">fi_map_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">connected_submap</span><span class="plain-syntax"> *</span><span class="identifier-syntax">submap</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">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">position</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">vector</span><span class="plain-syntax"> </span><span class="identifier-syntax">saved_gridpos</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">cooled</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">shifted</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">zone</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">colour</span><span class="plain-syntax">; </span><span class="comment-syntax"> an HTML colour for the room square (rooms only)</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">text_colour</span><span class="plain-syntax">; </span><span class="comment-syntax"> an HTML colour for text on that square</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">eps_x</span><span class="plain-syntax">, </span><span class="identifier-syntax">eps_y</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">map_connection_a</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">map_connection_b</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_lengths</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">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spatial_relationship</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">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">exits</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">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">lock_exits</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">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">exits_set_at</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">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">map_parameter_scope</span><span class="plain-syntax"> </span><span class="identifier-syntax">local_map_parameters</span><span class="plain-syntax">; </span><span class="comment-syntax"> temporary: used in EPS mapping</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">fi_map_data</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure fi_map_data is accessed in 4/mc, 4/sm, 4/rhm, 4/rem and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. </b>Data which is blanked out, ready for use, here:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">fi_map_data</span><span class="plain-syntax"> </span><span class="function-syntax">FauxInstances::new_fimd</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">FauxInstances::new_fimd</span></span>:<br/><a href="2-fi.html#SP2">&#167;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">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">fi_map_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">;</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">NULL</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">position</span><span class="plain-syntax"> = </span><a href="4-sg.html#SP2" class="function-link"><span class="function-syntax">Geometry::zero</span></a><span class="plain-syntax">();</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><a href="4-sg.html#SP2" class="function-link"><span class="function-syntax">Geometry::zero</span></a><span class="plain-syntax">();</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="identifier-syntax">FALSE</span><span class="plain-syntax">;</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">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">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">colour</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">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">text_colour</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">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">eps_x</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">fimd</span><span class="plain-syntax">.</span><span class="identifier-syntax">eps_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="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_a</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">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_b</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">for</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">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax">&lt;</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="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="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">exits</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="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">lock_exits</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="plain-syntax"> </span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">spatial_relationship</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="plain-syntax"> </span><span class="identifier-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">] = -1;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><a href="4-mc.html#SP4" class="function-link"><span class="function-syntax">ConfigureIndexMap::prepare_map_parameter_scope</span></a><span class="plain-syntax">(&amp;(</span><span class="identifier-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">local_map_parameters</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><span class="identifier-syntax">fimd</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>&#167;5. Sets. </b>Since we might want to index multiple different Inter trees in the same run,
we may need to keep multiple sets of faux instances, one for each tree. So:
</p>
<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">faux_instance_set</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_direction_fi</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_room_fi</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">instances</span><span class="plain-syntax">; </span><span class="comment-syntax"> of </span><span class="extract"><span class="extract-syntax">faux_instance</span></span>
<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">start_faux_instance</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_yourself</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">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_benchmark</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rubrics</span><span class="plain-syntax">; </span><span class="comment-syntax"> of </span><span class="extract"><span class="extract-syntax">rubric_holder</span></span>
<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure faux_instance_set is accessed in 4/rem and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>&#167;6. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax"> *</span><span class="function-syntax">FauxInstances::new_empty_set</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">FauxInstances::new_empty_set</span></span>:<br/><a href="2-fi.html#SP8">&#167;8</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">faux_instance_set</span><span class="plain-syntax"> *</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance_set</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_direction_fi</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_room_fi</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">instances</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NEW_LINKED_LIST</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="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">start_faux_instance</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_yourself</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_benchmark</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">rubrics</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NEW_LINKED_LIST</span><span class="plain-syntax">(</span><span class="reserved-syntax">rubric_holder</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">faux_set</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>&#167;7. </b>Iterating over faux instances in a set can then be done thus:
</p>
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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="identifier-syntax">LOOP_OVER_LINKED_LIST</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">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">instances</span><span class="plain-syntax">)</span>
<span class="definition-keyword">define</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="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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><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">R</span><span class="plain-syntax">))</span>
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_FAUX_DOORS</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="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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><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">R</span><span class="plain-syntax">))</span>
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_FAUX_REGIONS</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="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_region</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">))</span>
<span class="definition-keyword">define</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">R</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">))</span>
<span class="definition-keyword">define</span> <span class="identifier-syntax">LOOP_OVER_FAUX_BACKDROPS</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="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</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><a href="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_backdrop</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">))</span>
</pre>
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>&#167;8. </b>And here is the code to make a fully cross-referenced set from a given tree:
</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">FauxInstances::make_faux</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">FauxInstances::make_faux</span></span>:<br/>Indexing API - <a href="1-ia.html#SP8">&#167;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>
<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="2-fi.html#SP6" class="function-link"><span class="function-syntax">FauxInstances::new_empty_set</span></a><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">session</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">set_of_instances</span><span class="plain-syntax"> = </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">tree_inventory</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inv</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP6" class="function-link"><span class="function-syntax">Indexing::get_inventory</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">InterNodeList::array_sort</span><span class="plain-syntax">(</span><span class="identifier-syntax">inv</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">instance_nodes</span><span class="plain-syntax">, </span><span class="identifier-syntax">MakeSynopticModuleStage::module_order</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_INVENTORY_PACKAGES</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="identifier-syntax">inv</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">instance_nodes</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_object"</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_1" class="named-paragraph-link"><span class="named-paragraph">Add a faux instance to the set for this object-instance package</span><span class="named-paragraph-number">8.1</span></a></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>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</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">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_2" class="named-paragraph-link"><span class="named-paragraph">Cross-reference spatial relationships</span><span class="named-paragraph-number">8.2</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><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">I</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_3" class="named-paragraph-link"><span class="named-paragraph">Cross-reference map relationships</span><span class="named-paragraph-number">8.3</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="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_backdrop</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_4" class="named-paragraph-link"><span class="named-paragraph">Cross-reference backdrop locations</span><span class="named-paragraph-number">8.4</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="2-fi.html#SP13" class="function-link"><span class="function-syntax">FauxInstances::is_a_direction</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_5" class="named-paragraph-link"><span class="named-paragraph">Cross-reference diametric directions</span><span class="named-paragraph-number">8.5</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="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">I</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP8_6" class="named-paragraph-link"><span class="named-paragraph">Cross-reference door adjacencies</span><span class="named-paragraph-number">8.6</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><a href="2-fi.html#SP10" class="function-link"><span class="function-syntax">FauxInstances::decode_hints</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">session</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="SP8_1" class="paragraph-anchor"></a><b>&#167;8.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Add a faux instance to the set for this object-instance package</span><span class="named-paragraph-number">8.1</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">I</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP2" class="function-link"><span class="function-syntax">FauxInstances::new</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pack</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">ADD_TO_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax">, </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">instances</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_direction</span></a><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">-&gt;</span><span class="element-syntax">direction_index</span><span class="plain-syntax"> = </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_direction_fi</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">I</span><span class="plain-syntax">)) </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_room_fi</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_yourself"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_yourself</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_benchmark_room"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_benchmark</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_start_room"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">start_faux_instance</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP8_2" class="paragraph-anchor"></a><b>&#167;8.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cross-reference spatial relationships</span><span class="named-paragraph-number">8.2</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">region_enclosing</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^region_enclosing"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_sibling</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^sibling"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_child</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^child"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">progenitor</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^progenitor"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_sibling</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^incorp_sibling"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_child</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^incorp_child"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP8_3" class="paragraph-anchor"></a><b>&#167;8.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cross-reference map relationships</span><span class="named-paragraph-number">8.3</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">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^map"</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">P</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">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax">&lt;</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="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">offset</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</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">offset</span><span class="plain-syntax"> &gt;= </span><span class="identifier-syntax">ConstantInstruction::list_len</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">)) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_pair</span><span class="plain-syntax"> </span><span class="identifier-syntax">val</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ConstantInstruction::list_entry</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">InterValuePairs::is_symbolic</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterValuePairs::to_symbol_in</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="identifier-syntax">pack</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">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"malformed map metadata"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</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">i</span><span class="plain-syntax">] = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::symbol_to_faux_instance</span></a><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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">InterValuePairs::is_zero</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</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">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"malformed map metadata"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_pair</span><span class="plain-syntax"> </span><span class="identifier-syntax">val2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ConstantInstruction::list_entry</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">offset</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">InterValuePairs::is_number</span><span class="plain-syntax">(</span><span class="identifier-syntax">val2</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">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"malformed map metadata"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterValuePairs::to_number</span><span class="plain-syntax">(</span><span class="identifier-syntax">val2</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="identifier-syntax">I</span><span class="plain-syntax">-&gt;</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><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">N</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="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP8_4" class="paragraph-anchor"></a><b>&#167;8.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cross-reference backdrop locations</span><span class="named-paragraph-number">8.4</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^backdrop_presences"</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">P</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">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax">&lt;</span><span class="identifier-syntax">ConstantInstruction::list_len</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</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">inter_pair</span><span class="plain-syntax"> </span><span class="identifier-syntax">val</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ConstantInstruction::list_entry</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</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">InterValuePairs::is_symbolic</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</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">InterValuePairs::to_symbol_in</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="identifier-syntax">pack</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">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"malformed map metadata"</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">FL</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::symbol_to_faux_instance</span></a><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="identifier-syntax">ADD_TO_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax">, </span><span class="identifier-syntax">FL</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">backdrop_presences</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">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"malformed backdrop metadata"</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="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP8_5" class="paragraph-anchor"></a><b>&#167;8.5. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cross-reference diametric directions</span><span class="named-paragraph-number">8.5</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">opposite_direction</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^opposite_direction"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP8_6" class="paragraph-anchor"></a><b>&#167;8.6. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Cross-reference door adjacencies</span><span class="named-paragraph-number">8.6</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">other_side</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^other_side"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_a</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^side_a"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_b</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^side_b"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-fi.html#SP8">&#167;8</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>&#167;9. </b>When the Inter package for one instance wants to refer to another one, say
with the key <span class="extract"><span class="extract-syntax">other</span></span>, it does so by having a symbol <span class="extract"><span class="extract-syntax">other</span></span> defined as the
instance value of the other instance: so we first extract the symbol by looking
<span class="extract"><span class="extract-syntax">key</span></span> up in the first instance's package; then we can find the other instance
package simply by finding the container-package for where <span class="extract"><span class="extract-syntax">S</span></span> is defined.
It is then a simple if not especially quick task to find which <a href="2-fi.html#SP1" class="internal">faux_instance</a>
was made from that package.
</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">FauxInstances::xref</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">FauxInstances::xref</span></span>:<br/><a href="2-fi.html#SP8_2">&#167;8.2</a>, <a href="2-fi.html#SP8_5">&#167;8.5</a>, <a href="2-fi.html#SP8_6">&#167;8.6</a>, <a href="2-fi.html#SP10">&#167;10</a></span></button><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><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">key</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::symbol_to_faux_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Metadata::optional_symbol</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">key</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">FauxInstances::symbol_to_faux_instance</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">FauxInstances::symbol_to_faux_instance</span></span>:<br/><a href="2-fi.html#SP8_3">&#167;8.3</a>, <a href="2-fi.html#SP8_4">&#167;8.4</a></span></button><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>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</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="identifier-syntax">NULL</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="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">want</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterPackage::container</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">definition</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>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_FAUX_INSTANCES</span><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</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">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax"> == </span><span class="identifier-syntax">want</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">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">NULL</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>&#167;10. Decoding map hints. </b>Mapping hints arise from sentences like "Index with X mapped east of Y", or
some other helpful tip: these are compiled fairly directly into Inter packages,
and this is where we decode those packages and make use of them.
</p>
<p class="commentary">This is done in two passes. <span class="extract"><span class="extract-syntax">pass</span></span> 1 occurs when a new faux set of instances is
being made; <span class="extract"><span class="extract-syntax">pass</span></span> 2 only after the spatial grid layout has been calculated,
and only if needed.
</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">FauxInstances::decode_hints</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">FauxInstances::decode_hints</span></span>:<br/><a href="2-fi.html#SP8">&#167;8</a><br/>Render EPS Map - <a href="4-rem.html#SP1_1">&#167;1.1</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="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pass</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="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP6" class="function-link"><span class="function-syntax">Indexing::get_tree</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">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterPackage::from_URL</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="string-syntax">"/main/completion/mapping_hints"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_SUBPACKAGES</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"_mapping_hint"</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><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-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">to</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-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="identifier-syntax">dir</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^dir"</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">as_dir</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^as_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">dir</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">as_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">pass</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP10_1" class="named-paragraph-link"><span class="named-paragraph">Decode a hint mapping one direction as if another</span><span class="named-paragraph-number">10.1</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>
<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">) &amp;&amp; (</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">pass</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP10_2" class="named-paragraph-link"><span class="named-paragraph">Decode a hint mapping one room in a specific direction from another</span><span class="named-paragraph-number">10.2</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>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^name"</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">) &gt; </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">scope_level</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^scope_level"</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">scope_I</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^scope_instance"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">text_val</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^text"</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">int_val</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^number"</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">scope_level</span><span class="plain-syntax"> != </span><span class="constant-syntax">1000000</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">pass</span><span class="plain-syntax"> == </span><span class="constant-syntax">2</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP10_4" class="named-paragraph-link"><span class="named-paragraph">Decode a hint setting EPS map parameters relating to levels</span><span class="named-paragraph-number">10.4</span></a></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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">pass</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-fi.html#SP10_3" class="named-paragraph-link"><span class="named-paragraph">Decode a hint setting EPS map parameters</span><span class="named-paragraph-number">10.3</span></a></span><span class="plain-syntax">;</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="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">annotation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^annotation"</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">annotation</span><span class="plain-syntax">) &gt; </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">pass</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">rubric_holder</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rh</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">rubric_holder</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">annotation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">annotation</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">point_size</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^point_size"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">font</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^font"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">colour</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::optional_textual</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^colour"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">at_offset</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^offset"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rh</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">offset_from</span><span class="plain-syntax"> = </span><a href="2-fi.html#SP9" class="function-link"><span class="function-syntax">FauxInstances::xref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">, </span><span class="identifier-syntax">hint_pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^offset_from"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ADD_TO_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">rh</span><span class="plain-syntax">, </span><span class="reserved-syntax">rubric_holder</span><span class="plain-syntax">, </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">rubrics</span><span class="plain-syntax">);</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="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP10_1" class="paragraph-anchor"></a><b>&#167;10.1. </b>For instance, for "starboard" to be mapped as if "east":
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Decode a hint mapping one direction as if another</span><span class="named-paragraph-number">10.1</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">session</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">story_dir_to_page_dir</span><span class="plain-syntax">[</span><span class="identifier-syntax">dir</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">direction_index</span><span class="plain-syntax">] = </span><span class="identifier-syntax">as_dir</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">direction_index</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-fi.html#SP10">&#167;10</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP10_2" class="paragraph-anchor"></a><b>&#167;10.2. </b>For instance, for the East Room to be mapped east of the Grand Lobby:
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Decode a hint mapping one room in a specific direction from another</span><span class="named-paragraph-number">10.2</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_2" class="function-link"><span class="function-syntax">SpatialMap::lock_exit_in_place</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">-&gt;</span><span class="element-syntax">direction_index</span><span class="plain-syntax">, </span><span class="identifier-syntax">to</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="2-fi.html#SP10">&#167;10</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP10_3" class="paragraph-anchor"></a><b>&#167;10.3. </b>Most map parameters (e.g. setting room colours or font sizes) can be set
immediately, i.e., on <span class="extract"><span class="extract-syntax">pass</span></span> 1:
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Decode a hint setting EPS map parameters</span><span class="named-paragraph-number">10.3</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-mc.html#SP6" class="function-link"><span class="function-syntax">ConfigureIndexMap::put_mp</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">scope_I</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_val</span><span class="plain-syntax">, </span><span class="identifier-syntax">int_val</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="2-fi.html#SP10">&#167;10</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP10_4" class="paragraph-anchor"></a><b>&#167;10.4. </b>...but not those hints applying to a specific level of the map (e.g., level 4),
since we do not initially know what level any given room actually lives on: that
can only be known once the spatial grid has been found, i.e., on <span class="extract"><span class="extract-syntax">pass</span></span> 2.
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Decode a hint setting EPS map parameters relating to levels</span><span class="named-paragraph-number">10.4</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">map_parameter_scope</span><span class="plain-syntax"> *</span><span class="identifier-syntax">scope</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">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><a href="1-ia.html#SP7" class="function-link"><span class="function-syntax">Indexing::get_list_of_EPS_map_levels</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">EPS_map_level</span><span class="plain-syntax"> *</span><span class="identifier-syntax">eml</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">eml</span><span class="plain-syntax">, </span><span class="reserved-syntax">EPS_map_level</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">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">eml</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">contains_rooms</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> &amp;&amp; (</span><span class="identifier-syntax">eml</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">map_level</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">scope_level</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">scope</span><span class="plain-syntax"> = &amp;(</span><span class="identifier-syntax">eml</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">map_parameters</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">scope</span><span class="plain-syntax">) </span><a href="4-mc.html#SP6" class="function-link"><span class="function-syntax">ConfigureIndexMap::put_mp</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="identifier-syntax">scope</span><span class="plain-syntax">, </span><span class="identifier-syntax">scope_I</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_val</span><span class="plain-syntax">, </span><span class="identifier-syntax">int_val</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="2-fi.html#SP10">&#167;10</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>&#167;11. Instance set properties. </b></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">FauxInstances::start_room</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">FauxInstances::start_room</span></span>:<br/>Map Element - <a href="3-me.html#SP3">&#167;3</a>, <a href="3-me.html#SP7">&#167;7</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">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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">start_faux_instance</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">FauxInstances::yourself</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">FauxInstances::yourself</span></span>:<br/>Map Element - <a href="3-me.html#SP7">&#167;7</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">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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_yourself</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">FauxInstances::benchmark</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">FauxInstances::benchmark</span></span>:<br/>Spatial Map - <a href="4-sm.html#SP4">&#167;4</a>, <a href="4-sm.html#SP8_21">&#167;8.21</a>, <a href="4-sm.html#SP45">&#167;45</a><br/>Render HTML Map - <a href="4-rhm.html#SP12">&#167;12</a>, <a href="4-rhm.html#SP12_1">&#167;12.1</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">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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">faux_benchmark</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>&#167;12. </b></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">FauxInstances::no_directions</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">FauxInstances::no_directions</span></span>:<br/>Spatial Map - <a href="4-sm.html#SP8_10">&#167;8.10</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">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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_direction_fi</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">FauxInstances::no_rooms</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">FauxInstances::no_rooms</span></span>:<br/>Render HTML Map - <a href="4-rhm.html#SP7">&#167;7</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">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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">faux_set</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">no_room_fi</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>&#167;13. Individual instance properties. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="function-syntax">FauxInstances::get_name</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">FauxInstances::get_name</span></span>:<br/>Map Element - <a href="3-me.html#SP1_2_1">&#167;1.2.1</a><br/>Spatial Map - <a href="4-sm.html#SP8_2">&#167;8.2</a>, <a href="4-sm.html#SP24">&#167;24</a>, <a href="4-sm.html#SP24_1_2">&#167;24.1.2</a>, <a href="4-sm.html#SP34">&#167;34</a>, <a href="4-sm.html#SP35_1">&#167;35.1</a>, <a href="4-sm.html#SP36_1">&#167;36.1</a>, <a href="4-sm.html#SP38_1">&#167;38.1</a>, <a href="4-sm.html#SP38_1_1">&#167;38.1.1</a>, <a href="4-sm.html#SP8_28">&#167;8.28</a>, <a href="4-sm.html#SP43_1">&#167;43.1</a>, <a href="4-sm.html#SP44">&#167;44</a><br/>Render HTML Map - <a href="4-rhm.html#SP7_1_4">&#167;7.1.4</a>, <a href="4-rhm.html#SP12">&#167;12</a>, <a href="4-rhm.html#SP14">&#167;14</a>, <a href="4-rhm.html#SP14_1">&#167;14.1</a><br/>Render EPS Map - <a href="4-rem.html#SP2_2">&#167;2.2</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</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">FauxInstances::write_name</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">FauxInstances::write_name</span></span>:<br/>Map Element - <a href="3-me.html#SP2_3_1">&#167;2.3.1</a>, <a href="3-me.html#SP2_8">&#167;2.8</a>, <a href="3-me.html#SP3">&#167;3</a>, <a href="3-me.html#SP7">&#167;7</a><br/>Spatial Map - <a href="4-sm.html#SP44">&#167;44</a>, <a href="4-sm.html#SP45">&#167;45</a><br/>Render HTML Map - <a href="4-rhm.html#SP11_2_2">&#167;11.2.2</a>, <a href="4-rhm.html#SP13">&#167;13</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">I</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">"%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">I</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">FauxInstances::write_kind</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">FauxInstances::write_kind</span></span>:<br/>Map Element - <a href="3-me.html#SP2_3_1">&#167;2.3.1</a>, <a href="3-me.html#SP2_3_1_1">&#167;2.3.1.1</a>, <a href="3-me.html#SP2_4">&#167;2.4</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">I</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">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_text</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">FauxInstances::write_kind_chain</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">FauxInstances::write_kind_chain</span></span>:<br/>Map Element - <a href="3-me.html#SP2_8">&#167;2.8</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">I</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">"%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_chain</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">FauxInstances::region_of</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">FauxInstances::region_of</span></span>:<br/>Map Element - <a href="3-me.html#SP1_2">&#167;1.2</a>, <a href="3-me.html#SP1_2_1">&#167;1.2.1</a>, <a href="3-me.html#SP3">&#167;3</a><br/>Spatial Map - <a href="4-sm.html#SP39">&#167;39</a>, <a href="4-sm.html#SP43_1">&#167;43.1</a><br/>Render HTML Map - <a href="4-rhm.html#SP6">&#167;6</a>, <a href="4-rhm.html#SP14">&#167;14</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">region_enclosing</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">FauxInstances::opposite_direction</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">FauxInstances::opposite_direction</span></span>:<br/>Spatial Map - <a href="4-sm.html#SP44">&#167;44</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">opposite_direction</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">FauxInstances::other_side_of_door</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">FauxInstances::other_side_of_door</span></span>:<br/>Map Element - <a href="3-me.html#SP3">&#167;3</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">other_side</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">FauxInstances::sibling</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">FauxInstances::sibling</span></span>:<br/>Map Element - <a href="3-me.html#SP6">&#167;6</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_sibling</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">FauxInstances::child</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">FauxInstances::child</span></span>:<br/>Map Element - <a href="3-me.html#SP6">&#167;6</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">object_tree_child</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">FauxInstances::progenitor</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">FauxInstances::progenitor</span></span>:<br/>Map Element - <a href="3-me.html#SP1_4">&#167;1.4</a>, <a href="3-me.html#SP4">&#167;4</a>, <a href="3-me.html#SP6">&#167;6</a>, <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">progenitor</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">FauxInstances::incorp_child</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">FauxInstances::incorp_child</span></span>:<br/>Map Element - <a href="3-me.html#SP6">&#167;6</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_child</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">FauxInstances::incorp_sibling</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">FauxInstances::incorp_sibling</span></span>:<br/>Map Element - <a href="3-me.html#SP6">&#167;6</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">incorp_tree_sibling</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">FauxInstances::is_a_direction</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">FauxInstances::is_a_direction</span></span>:<br/><a href="2-fi.html#SP7">&#167;7</a>, <a href="2-fi.html#SP8">&#167;8</a>, <a href="2-fi.html#SP8_1">&#167;8.1</a><br/>Map Element - <a href="3-me.html#SP1_1">&#167;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">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">I</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">FALSE</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_direction"</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">FauxInstances::is_a_room</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">FauxInstances::is_a_room</span></span>:<br/><a href="2-fi.html#SP7">&#167;7</a>, <a href="2-fi.html#SP8">&#167;8</a>, <a href="2-fi.html#SP8_1">&#167;8.1</a><br/>Map Element - <a href="3-me.html#SP2">&#167;2</a>, <a href="3-me.html#SP2_3_1">&#167;2.3.1</a>, <a href="3-me.html#SP3">&#167;3</a>, <a href="3-me.html#SP6">&#167;6</a><br/>Spatial Map - <a href="4-sm.html#SP8_13">&#167;8.13</a><br/>Render EPS Map - <a href="4-rem.html#SP1_2_1_6">&#167;1.2.1.6</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_room"</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">FauxInstances::is_a_door</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">FauxInstances::is_a_door</span></span>:<br/><a href="2-fi.html#SP7">&#167;7</a>, <a href="2-fi.html#SP8">&#167;8</a><br/>Map Element - <a href="3-me.html#SP3">&#167;3</a>, <a href="3-me.html#SP6">&#167;6</a><br/>Spatial Map - <a href="4-sm.html#SP8_13">&#167;8.13</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_door"</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">FauxInstances::is_a_region</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">FauxInstances::is_a_region</span></span>:<br/><a href="2-fi.html#SP7">&#167;7</a><br/>Map Element - <a href="3-me.html#SP1_2">&#167;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">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">I</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">FALSE</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">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_region"</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">FauxInstances::is_a_backdrop</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">FauxInstances::is_a_backdrop</span></span>:<br/><a href="2-fi.html#SP7">&#167;7</a>, <a href="2-fi.html#SP8">&#167;8</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_backdrop"</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">FauxInstances::is_a_thing</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">FauxInstances::is_a_thing</span></span>:<br/>Map Element - <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_thing"</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">FauxInstances::is_a_supporter</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">FauxInstances::is_a_supporter</span></span>:<br/>Map Element - <a href="3-me.html#SP4">&#167;4</a>, <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_supporter"</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">FauxInstances::is_a_person</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">FauxInstances::is_a_person</span></span>:<br/>Map Element - <a href="3-me.html#SP4">&#167;4</a>, <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_person"</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">FauxInstances::is_worn</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">FauxInstances::is_worn</span></span>:<br/>Map Element - <a href="3-me.html#SP4">&#167;4</a>, <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_worn"</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">FauxInstances::is_everywhere</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">FauxInstances::is_everywhere</span></span>:<br/>Map Element - <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_everywhere"</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">FauxInstances::is_a_part</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">FauxInstances::is_a_part</span></span>:<br/>Map Element - <a href="3-me.html#SP4">&#167;4</a>, <a href="3-me.html#SP5">&#167;5</a>, <a href="3-me.html#SP7">&#167;7</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^is_a_part"</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">FauxInstances::created_at</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">FauxInstances::created_at</span></span>:<br/>Map Element - <a href="3-me.html#SP2_5">&#167;2.5</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="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="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">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^at"</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">FauxInstances::kind_set_at</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">FauxInstances::kind_set_at</span></span>:<br/>Map Element - <a href="3-me.html#SP2_8">&#167;2.8</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="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="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">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^kind_set_at"</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">FauxInstances::progenitor_set_at</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">FauxInstances::progenitor_set_at</span></span>:<br/>Map Element - <a href="3-me.html#SP7">&#167;7</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="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="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">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^progenitor_set_at"</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">FauxInstances::region_set_at</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">FauxInstances::region_set_at</span></span>:<br/>Map Element - <a href="3-me.html#SP3">&#167;3</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="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="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">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">Metadata::read_optional_numeric</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^region_set_at"</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">FauxInstances::get_door_data</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">FauxInstances::get_door_data</span></span>:<br/>Map Element - <a href="3-me.html#SP3">&#167;3</a>, <a href="3-me.html#SP6">&#167;6</a><br/>Spatial Map - <a href="4-sm.html#SP8_13">&#167;8.13</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">door</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">c1</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> **</span><span class="identifier-syntax">c2</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">c1</span><span class="plain-syntax">) *</span><span class="identifier-syntax">c1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">door</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_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">c2</span><span class="plain-syntax">) *</span><span class="identifier-syntax">c2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">door</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">map_connection_b</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">map_parameter_scope</span><span class="plain-syntax"> *</span><span class="function-syntax">FauxInstances::get_parameters</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">FauxInstances::get_parameters</span></span>:<br/>Map Configuration - <a href="4-mc.html#SP6">&#167;6</a><br/>Render EPS Map - <a href="4-rem.html#SP1_1_2">&#167;1.1.2</a>, <a href="4-rem.html#SP1_1_3">&#167;1.1.3</a>, <a href="4-rem.html#SP1_2_1_5">&#167;1.2.1.5</a>, <a href="4-rem.html#SP1_2_1_6">&#167;1.2.1.6</a>, <a href="4-rem.html#SP1_2_1_6_1">&#167;1.2.1.6.1</a>, <a href="4-rem.html#SP1_2_1_7">&#167;1.2.1.7</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="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="identifier-syntax">NULL</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">return</span><span class="plain-syntax"> &amp;(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">fimd</span><span class="plain-syntax">.</span><span class="element-syntax">local_map_parameters</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">FauxInstances::specify_kind</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">FauxInstances::specify_kind</span></span>:<br/>Map Element - <a href="3-me.html#SP2_4">&#167;2.4</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="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="identifier-syntax">NULL</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"thing"</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">kind_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"room"</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="SP14" class="paragraph-anchor"></a><b>&#167;14. Appearance counts. </b>This code simply avoids repetitions in the World index:
</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">FauxInstances::increment_indexing_count</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">FauxInstances::increment_indexing_count</span></span>:<br/>Map Element - <a href="3-me.html#SP1_1">&#167;1.1</a>, <a href="3-me.html#SP1_2">&#167;1.2</a>, <a href="3-me.html#SP2">&#167;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="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">index_appearances</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">FauxInstances::indexed_yet</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">FauxInstances::indexed_yet</span></span>:<br/>Map Element - <a href="3-me.html#SP1_3">&#167;1.3</a>, <a href="3-me.html#SP1_4">&#167;1.4</a>, <a href="3-me.html#SP7">&#167;7</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="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">index_appearances</span><span class="plain-syntax"> &gt; </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>
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