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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree"></a><a class="link" href="specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.html" title="Specializing index::indexable function object - storing shared pointers in the rtree">Specializing
  28         index::indexable function object - storing shared pointers in the rtree</a>
  29 </h4></div></div></div>
  30 <p>
  31 </p>
  32 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  33 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  34 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  35
  36 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">index</span><span class="special">/</span><span class="identifier">rtree</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  37
  38 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">cmath</span><span class="special">&gt;</span>
  39 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">vector</span><span class="special">&gt;</span>
  40 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
  41 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">foreach</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  42 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">shared_ptr</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  43
  44 <span class="keyword">namespace</span> <span class="identifier">bg</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">;</span>
  45 <span class="keyword">namespace</span> <span class="identifier">bgi</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">index</span><span class="special">;</span>
  46
  47 <span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">geometry</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">index</span> <span class="special">{</span>
  48
  49 <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Box</span><span class="special">&gt;</span>
  50 <span class="keyword">struct</span> <span class="identifier">indexable</span><span class="special">&lt;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special">&lt;</span><span class="identifier">Box</span><span class="special">&gt;</span> <span class="special">&gt;</span>
  51 <span class="special">{</span>
  52     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special">&lt;</span><span class="identifier">Box</span><span class="special">&gt;</span> <span class="identifier">V</span><span class="special">;</span>
  53
  54     <span class="keyword">typedef</span> <span class="identifier">Box</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">result_type</span><span class="special">;</span>
  55     <span class="identifier">result_type</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">V</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="special">*</span><span class="identifier">v</span><span class="special">;</span> <span class="special">}</span>
  56 <span class="special">};</span>
  57
  58 <span class="special">}}}</span> <span class="comment">// namespace boost::geometry::index</span>
  59
  60 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
  61 <span class="special">{</span>
  62     <span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">&gt;</span> <span class="identifier">point</span><span class="special">;</span>
  63     <span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">box</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">box</span><span class="special">;</span>
  64     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;</span> <span class="identifier">shp</span><span class="special">;</span>
  65     <span class="keyword">typedef</span> <span class="identifier">shp</span> <span class="identifier">value</span><span class="special">;</span>
  66
  67     <span class="comment">// create the rtree using default constructor</span>
  68     <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">rtree</span><span class="special">&lt;</span> <span class="identifier">value</span><span class="special">,</span> <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">linear</span><span class="special">&lt;</span><span class="number">16</span><span class="special">,</span> <span class="number">4</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">rtree</span><span class="special">;</span>
  69
  70     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"filling index with boxes shared pointers:"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
  71
  72     <span class="comment">// fill the spatial index</span>
  73     <span class="keyword">for</span> <span class="special">(</span> <span class="keyword">unsigned</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span> <span class="special">;</span> <span class="identifier">i</span> <span class="special">&lt;</span> <span class="number">10</span> <span class="special">;</span> <span class="special">++</span><span class="identifier">i</span> <span class="special">)</span>
  74     <span class="special">{</span>
  75         <span class="comment">// create a box</span>
  76         <span class="identifier">shp</span> <span class="identifier">b</span><span class="special">(</span><span class="keyword">new</span> <span class="identifier">box</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span><span class="special">+</span><span class="number">0.0f</span><span class="special">,</span> <span class="identifier">i</span><span class="special">+</span><span class="number">0.0f</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span><span class="special">+</span><span class="number">0.5f</span><span class="special">,</span> <span class="identifier">i</span><span class="special">+</span><span class="number">0.5f</span><span class="special">)));</span>
  77
  78         <span class="comment">// display new box</span>
  79         <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(*</span><span class="identifier">b</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
  80
  81         <span class="comment">// insert new value</span>
  82         <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="identifier">b</span><span class="special">);</span>
  83     <span class="special">}</span>
  84
  85     <span class="comment">// find values intersecting some area defined by a box</span>
  86     <span class="identifier">box</span> <span class="identifier">query_box</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">));</span>
  87     <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">value</span><span class="special">&gt;</span> <span class="identifier">result_s</span><span class="special">;</span>
  88     <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">intersects</span><span class="special">(</span><span class="identifier">query_box</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_s</span><span class="special">));</span>
  89
  90     <span class="comment">// find 5 nearest values to a point</span>
  91     <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">value</span><span class="special">&gt;</span> <span class="identifier">result_n</span><span class="special">;</span>
  92     <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">nearest</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="number">5</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_n</span><span class="special">));</span>
  93
  94     <span class="comment">// note: in Boost.Geometry the WKT representation of a box is polygon</span>
  95
  96     <span class="comment">// display results</span>
  97     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"spatial query box:"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
  98     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="identifier">query_box</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
  99     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"spatial query result:"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 100     <span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_s</span><span class="special">)</span>
 101         <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(*</span><span class="identifier">v</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 102
 103     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"knn query point:"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 104     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">))</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 105     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"knn query result:"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 106     <span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_n</span><span class="special">)</span>
 107         <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(*</span><span class="identifier">v</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 108
 109     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 110 <span class="special">}</span>
 111 </pre>
 112 <p>
 113         </p>
 114 <h5>
 115 <a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.h0"></a>
 116           <span class="phrase"><a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.expected_results"></a></span><a class="link" href="specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.html#geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.expected_results">Expected
 117           results</a>
 118         </h5>
 119 <pre class="programlisting"><span class="identifier">filling</span> <span class="identifier">index</span> <span class="identifier">with</span> <span class="identifier">boxes</span> <span class="identifier">shared</span> <span class="identifier">pointers</span><span class="special">:</span>
 120 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
 121 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
 122 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
 123 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
 124 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
 125 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">))</span>
 126 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">6</span> <span class="number">6</span><span class="special">,</span><span class="number">6</span> <span class="number">6.5</span><span class="special">,</span><span class="number">6.5</span> <span class="number">6.5</span><span class="special">,</span><span class="number">6.5</span> <span class="number">6</span><span class="special">,</span><span class="number">6</span> <span class="number">6</span><span class="special">))</span>
 127 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">7</span> <span class="number">7</span><span class="special">,</span><span class="number">7</span> <span class="number">7.5</span><span class="special">,</span><span class="number">7.5</span> <span class="number">7.5</span><span class="special">,</span><span class="number">7.5</span> <span class="number">7</span><span class="special">,</span><span class="number">7</span> <span class="number">7</span><span class="special">))</span>
 128 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">8</span> <span class="number">8</span><span class="special">,</span><span class="number">8</span> <span class="number">8.5</span><span class="special">,</span><span class="number">8.5</span> <span class="number">8.5</span><span class="special">,</span><span class="number">8.5</span> <span class="number">8</span><span class="special">,</span><span class="number">8</span> <span class="number">8</span><span class="special">))</span>
 129 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">9</span> <span class="number">9</span><span class="special">,</span><span class="number">9</span> <span class="number">9.5</span><span class="special">,</span><span class="number">9.5</span> <span class="number">9.5</span><span class="special">,</span><span class="number">9.5</span> <span class="number">9</span><span class="special">,</span><span class="number">9</span> <span class="number">9</span><span class="special">))</span>
 130 <span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">box</span><span class="special">:</span>
 131 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
 132 <span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
 133 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
 134 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
 135 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
 136 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
 137 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
 138 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">))</span>
 139 <span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">point</span><span class="special">:</span>
 140 <span class="identifier">POINT</span><span class="special">(</span><span class="number">0</span> <span class="number">0</span><span class="special">)</span>
 141 <span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
 142 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
 143 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
 144 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
 145 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
 146 <span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
 147 </pre>
 148 </div>
 149 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 150 <td align="left"></td>
 151 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2017 Barend
 152       Gehrels, Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its
 153       affiliates<p>
 154         Distributed under the Boost Software License, Version 1.0. (See accompanying
 155         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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