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31</p> 32<pre class="programlisting"><span class="preprocessor">#include</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">hpp</span><span class="special">></span> 33<span class="preprocessor">#include</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">geometries</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 34<span class="preprocessor">#include</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">geometries</span><span class="special">/</span><span class="identifier">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 35<span class="preprocessor">#include</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">geometries</span><span class="special">/</span><span class="identifier">polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 36 37<span class="preprocessor">#include</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><span class="identifier">rtree</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 38 39<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cmath</span><span class="special">></span> 40<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span> 41<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 42<span class="preprocessor">#include</span> <span class="special"><</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">></span> 43<span class="preprocessor">#include</span> <span class="special"><</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">></span> 44 45<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> 46<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> 47 48<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 49<span class="special">{</span> 50 <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"><</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">></span> <span class="identifier">point</span><span class="special">;</span> 51 <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"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">box</span><span class="special">;</span> 52 <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">polygon</span><span class="special"><</span><span class="identifier">point</span><span class="special">,</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">false</span><span class="special">></span> <span class="identifier">polygon</span><span class="special">;</span> <span class="comment">// ccw, open polygon</span> 53 <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">></span> <span class="identifier">shp</span><span class="special">;</span> 54 <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span><span class="identifier">box</span><span class="special">,</span> <span class="identifier">shp</span><span class="special">></span> <span class="identifier">value</span><span class="special">;</span> 55 56 <span class="comment">// create the rtree using default constructor</span> 57 <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">rtree</span><span class="special"><</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"><</span><span class="number">16</span><span class="special">,</span> <span class="number">4</span><span class="special">></span> <span class="special">></span> <span class="identifier">rtree</span><span class="special">;</span> 58 59 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"filling index with polygons shared pointers:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 60 61 <span class="comment">// create some polygons and fill the spatial index</span> 62 <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"><</span> <span class="number">10</span> <span class="special">;</span> <span class="special">++</span><span class="identifier">i</span> <span class="special">)</span> 63 <span class="special">{</span> 64 <span class="comment">// create a polygon</span> 65 <span class="identifier">shp</span> <span class="identifier">p</span><span class="special">(</span><span class="keyword">new</span> <span class="identifier">polygon</span><span class="special">());</span> 66 <span class="keyword">for</span> <span class="special">(</span> <span class="keyword">float</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">0</span> <span class="special">;</span> <span class="identifier">a</span> <span class="special"><</span> <span class="number">6.28316f</span> <span class="special">;</span> <span class="identifier">a</span> <span class="special">+=</span> <span class="number">1.04720f</span> <span class="special">)</span> 67 <span class="special">{</span> 68 <span class="keyword">float</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">i</span> <span class="special">+</span> <span class="keyword">int</span><span class="special">(</span><span class="number">10</span><span class="special">*::</span><span class="identifier">cos</span><span class="special">(</span><span class="identifier">a</span><span class="special">))*</span><span class="number">0.1f</span><span class="special">;</span> 69 <span class="keyword">float</span> <span class="identifier">y</span> <span class="special">=</span> <span class="identifier">i</span> <span class="special">+</span> <span class="keyword">int</span><span class="special">(</span><span class="number">10</span><span class="special">*::</span><span class="identifier">sin</span><span class="special">(</span><span class="identifier">a</span><span class="special">))*</span><span class="number">0.1f</span><span class="special">;</span> 70 <span class="identifier">p</span><span class="special">-></span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">));</span> 71 <span class="special">}</span> 72 73 <span class="comment">// display new polygon</span> 74 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">>(*</span><span class="identifier">p</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 75 76 <span class="comment">// calculate polygon bounding box</span> 77 <span class="identifier">box</span> <span class="identifier">b</span> <span class="special">=</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">return_envelope</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(*</span><span class="identifier">p</span><span class="special">);</span> 78 <span class="comment">// insert new value</span> 79 <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">p</span><span class="special">));</span> 80 <span class="special">}</span> 81 82 <span class="comment">// find values intersecting some area defined by a box</span> 83 <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> 84 <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">value</span><span class="special">></span> <span class="identifier">result_s</span><span class="special">;</span> 85 <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> 86 87 <span class="comment">// find 5 nearest values to a point</span> 88 <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">value</span><span class="special">></span> <span class="identifier">result_n</span><span class="special">;</span> 89 <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> 90 91 <span class="comment">// note: in Boost.Geometry the WKT representation of a box is polygon</span> 92 93 <span class="comment">// note: the values store the bounding boxes of polygons</span> 94 <span class="comment">// the polygons aren't used for querying but are printed</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"><<</span> <span class="string">"spatial query box:"</span> <span class="special"><<</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"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(</span><span class="identifier">query_box</span><span class="special">)</span> <span class="special"><<</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"><<</span> <span class="string">"spatial query result:"</span> <span class="special"><<</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">&</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"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">>(*</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">second</span><span class="special">)</span> <span class="special"><<</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"><<</span> <span class="string">"knn query point:"</span> <span class="special"><<</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"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">point</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="special"><<</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"><<</span> <span class="string">"knn query result:"</span> <span class="special"><<</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">&</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"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">polygon</span><span class="special">>(*</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">second</span><span class="special">)</span> <span class="special"><<</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.index_of_shared_pointers_to_polygons.h0"></a> 116 <span class="phrase"><a name="geometry.spatial_indexes.rtree_examples.index_of_shared_pointers_to_polygons.expected_results"></a></span><a class="link" href="index_of_shared_pointers_to_polygons.html#geometry.spatial_indexes.rtree_examples.index_of_shared_pointers_to_polygons.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">polygons</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">1</span> <span class="number">0</span><span class="special">,</span><span class="number">0.4</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.5</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.9</span> <span class="number">0</span><span class="special">,-</span><span class="number">0.4</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">0.5</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">1</span> <span class="number">0</span><span class="special">))</span> 121<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">1</span><span class="special">,</span><span class="number">1.4</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.5</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.1</span> <span class="number">1</span><span class="special">,</span><span class="number">0.6</span> <span class="number">0.2</span><span class="special">,</span><span class="number">1.5</span> <span class="number">0.2</span><span class="special">,</span><span class="number">2</span> <span class="number">1</span><span class="special">))</span> 122<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">2</span><span class="special">,</span><span class="number">2.4</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.5</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.1</span> <span class="number">2</span><span class="special">,</span><span class="number">1.6</span> <span class="number">1.2</span><span class="special">,</span><span class="number">2.5</span> <span class="number">1.2</span><span class="special">,</span><span class="number">3</span> <span class="number">2</span><span class="special">))</span> 123<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">3</span><span class="special">,</span><span class="number">3.4</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.5</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.1</span> <span class="number">3</span><span class="special">,</span><span class="number">2.6</span> <span class="number">2.2</span><span class="special">,</span><span class="number">3.5</span> <span class="number">2.2</span><span class="special">,</span><span class="number">4</span> <span class="number">3</span><span class="special">))</span> 124<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">4</span><span class="special">,</span><span class="number">4.4</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.5</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.1</span> <span class="number">4</span><span class="special">,</span><span class="number">3.6</span> <span class="number">3.2</span><span class="special">,</span><span class="number">4.5</span> <span class="number">3.2</span><span class="special">,</span><span class="number">5</span> <span class="number">4</span><span class="special">))</span> 125<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">6</span> <span class="number">5</span><span class="special">,</span><span class="number">5.4</span> <span class="number">5.8</span><span class="special">,</span><span class="number">4.5</span> <span class="number">5.8</span><span class="special">,</span><span class="number">4.1</span> <span class="number">5</span><span class="special">,</span><span class="number">4.6</span> <span class="number">4.2</span><span class="special">,</span><span class="number">5.5</span> <span class="number">4.2</span><span class="special">,</span><span class="number">6</span> <span class="number">5</span><span class="special">))</span> 126<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">7</span> <span class="number">6</span><span class="special">,</span><span class="number">6.4</span> <span class="number">6.8</span><span class="special">,</span><span class="number">5.5</span> <span class="number">6.8</span><span class="special">,</span><span class="number">5.1</span> <span class="number">6</span><span class="special">,</span><span class="number">5.6</span> <span class="number">5.2</span><span class="special">,</span><span class="number">6.5</span> <span class="number">5.2</span><span class="special">,</span><span class="number">7</span> <span class="number">6</span><span class="special">))</span> 127<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">8</span> <span class="number">7</span><span class="special">,</span><span class="number">7.4</span> <span class="number">7.8</span><span class="special">,</span><span class="number">6.5</span> <span class="number">7.8</span><span class="special">,</span><span class="number">6.1</span> <span class="number">7</span><span class="special">,</span><span class="number">6.6</span> <span class="number">6.2</span><span class="special">,</span><span class="number">7.5</span> <span class="number">6.2</span><span class="special">,</span><span class="number">8</span> <span class="number">7</span><span class="special">))</span> 128<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">9</span> <span class="number">8</span><span class="special">,</span><span class="number">8.4</span> <span class="number">8.8</span><span class="special">,</span><span class="number">7.5</span> <span class="number">8.8</span><span class="special">,</span><span class="number">7.1</span> <span class="number">8</span><span class="special">,</span><span class="number">7.6</span> <span class="number">7.2</span><span class="special">,</span><span class="number">8.5</span> <span class="number">7.2</span><span class="special">,</span><span class="number">9</span> <span class="number">8</span><span class="special">))</span> 129<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">10</span> <span class="number">9</span><span class="special">,</span><span class="number">9.4</span> <span class="number">9.8</span><span class="special">,</span><span class="number">8.5</span> <span class="number">9.8</span><span class="special">,</span><span class="number">8.1</span> <span class="number">9</span><span class="special">,</span><span class="number">8.6</span> <span class="number">8.2</span><span class="special">,</span><span class="number">9.5</span> <span class="number">8.2</span><span class="special">,</span><span class="number">10</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">1</span> <span class="number">0</span><span class="special">,</span><span class="number">0.4</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.5</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.9</span> <span class="number">0</span><span class="special">,-</span><span class="number">0.4</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">0.5</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">1</span> <span class="number">0</span><span class="special">))</span> 134<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">1</span><span class="special">,</span><span class="number">1.4</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.5</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.1</span> <span class="number">1</span><span class="special">,</span><span class="number">0.6</span> <span class="number">0.2</span><span class="special">,</span><span class="number">1.5</span> <span class="number">0.2</span><span class="special">,</span><span class="number">2</span> <span class="number">1</span><span class="special">))</span> 135<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">2</span><span class="special">,</span><span class="number">2.4</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.5</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.1</span> <span class="number">2</span><span class="special">,</span><span class="number">1.6</span> <span class="number">1.2</span><span class="special">,</span><span class="number">2.5</span> <span class="number">1.2</span><span class="special">,</span><span class="number">3</span> <span class="number">2</span><span class="special">))</span> 136<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">3</span><span class="special">,</span><span class="number">3.4</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.5</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.1</span> <span class="number">3</span><span class="special">,</span><span class="number">2.6</span> <span class="number">2.2</span><span class="special">,</span><span class="number">3.5</span> <span class="number">2.2</span><span class="special">,</span><span class="number">4</span> <span class="number">3</span><span class="special">))</span> 137<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">4</span><span class="special">,</span><span class="number">4.4</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.5</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.1</span> <span class="number">4</span><span class="special">,</span><span class="number">3.6</span> <span class="number">3.2</span><span class="special">,</span><span class="number">4.5</span> <span class="number">3.2</span><span class="special">,</span><span class="number">5</span> <span class="number">4</span><span class="special">))</span> 138<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">6</span> <span class="number">5</span><span class="special">,</span><span class="number">5.4</span> <span class="number">5.8</span><span class="special">,</span><span class="number">4.5</span> <span class="number">5.8</span><span class="special">,</span><span class="number">4.1</span> <span class="number">5</span><span class="special">,</span><span class="number">4.6</span> <span class="number">4.2</span><span class="special">,</span><span class="number">5.5</span> <span class="number">4.2</span><span class="special">,</span><span class="number">6</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">5</span> <span class="number">4</span><span class="special">,</span><span class="number">4.4</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.5</span> <span class="number">4.8</span><span class="special">,</span><span class="number">3.1</span> <span class="number">4</span><span class="special">,</span><span class="number">3.6</span> <span class="number">3.2</span><span class="special">,</span><span class="number">4.5</span> <span class="number">3.2</span><span class="special">,</span><span class="number">5</span> <span class="number">4</span><span class="special">))</span> 143<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">3</span><span class="special">,</span><span class="number">3.4</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.5</span> <span class="number">3.8</span><span class="special">,</span><span class="number">2.1</span> <span class="number">3</span><span class="special">,</span><span class="number">2.6</span> <span class="number">2.2</span><span class="special">,</span><span class="number">3.5</span> <span class="number">2.2</span><span class="special">,</span><span class="number">4</span> <span class="number">3</span><span class="special">))</span> 144<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">2</span><span class="special">,</span><span class="number">2.4</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.5</span> <span class="number">2.8</span><span class="special">,</span><span class="number">1.1</span> <span class="number">2</span><span class="special">,</span><span class="number">1.6</span> <span class="number">1.2</span><span class="special">,</span><span class="number">2.5</span> <span class="number">1.2</span><span class="special">,</span><span class="number">3</span> <span class="number">2</span><span class="special">))</span> 145<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">0</span><span class="special">,</span><span class="number">0.4</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.5</span> <span class="number">0.8</span><span class="special">,-</span><span class="number">0.9</span> <span class="number">0</span><span class="special">,-</span><span class="number">0.4</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">0.5</span> <span class="special">-</span><span class="number">0.8</span><span class="special">,</span><span class="number">1</span> <span class="number">0</span><span class="special">))</span> 146<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">1</span><span class="special">,</span><span class="number">1.4</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.5</span> <span class="number">1.8</span><span class="special">,</span><span class="number">0.1</span> <span class="number">1</span><span class="special">,</span><span class="number">0.6</span> <span class="number">0.2</span><span class="special">,</span><span class="number">1.5</span> <span class="number">0.2</span><span class="special">,</span><span class="number">2</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 © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 152 Wulkiewicz, Oracle and/or its affiliates<p> 153 Distributed under the Boost Software License, Version 1.0. (See accompanying 154 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>) 155 </p> 156</div></td> 157</tr></table> 158<hr> 159<div class="spirit-nav"> 160<a accesskey="p" href="index_of_polygons_stored_in_vector.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../rtree_examples.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="index_of_iterators_of_a_map_storing_variant_geometries.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 161</div> 162</body> 163</html> 164
