libs/geometry/doc/html/geometry/reference/core/point_type.html

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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.reference.core.point_type"></a><a class="link" href="point_type.html" title="point_type">point_type</a>
  28 </h4></div></div></div>
  29 <p>
  30           <a class="indexterm" name="idp124638560"></a>
  31 Metafunction defining <span class="bold"><strong>type</strong></span> as the point_type
  32           of the specified geometry type.
  33         </p>
  34 <h6>
  35 <a name="geometry.reference.core.point_type.h0"></a>
  36           <span class="phrase"><a name="geometry.reference.core.point_type.synopsis"></a></span><a class="link" href="point_type.html#geometry.reference.core.point_type.synopsis">Synopsis</a>
  37         </h6>
  38 <p>
  39 </p>
  40 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">&gt;</span>
  41 <span class="keyword">struct</span> <span class="identifier">point_type</span>
  42 <span class="special">{</span>
  43   <span class="comment">// ...</span>
  44 <span class="special">};</span>
  45 </pre>
  46 <p>
  47         </p>
  48 <h6>
  49 <a name="geometry.reference.core.point_type.h1"></a>
  50           <span class="phrase"><a name="geometry.reference.core.point_type.template_parameter_s_"></a></span><a class="link" href="point_type.html#geometry.reference.core.point_type.template_parameter_s_">Template
  51           parameter(s)</a>
  52         </h6>
  53 <div class="informaltable"><table class="table">
  54 <colgroup>
  55 <col>
  56 <col>
  57 </colgroup>
  58 <thead><tr>
  59 <th>
  60                   <p>
  61                     Parameter
  62                   </p>
  63                 </th>
  64 <th>
  65                   <p>
  66                     Description
  67                   </p>
  68                 </th>
  69 </tr></thead>
  70 <tbody><tr>
  71 <td>
  72                   <p>
  73                     typename Geometry
  74                   </p>
  75                 </td>
  76 <td>
  77                   <p>
  78                     Any type fulfilling a Geometry Concept
  79                   </p>
  80                 </td>
  81 </tr></tbody>
  82 </table></div>
  83 <h6>
  84 <a name="geometry.reference.core.point_type.h2"></a>
  85           <span class="phrase"><a name="geometry.reference.core.point_type.header"></a></span><a class="link" href="point_type.html#geometry.reference.core.point_type.header">Header</a>
  86         </h6>
  87 <p>
  88           Either
  89         </p>
  90 <p>
  91           <code class="computeroutput"><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></code>
  92         </p>
  93 <p>
  94           Or
  95         </p>
  96 <p>
  97           <code class="computeroutput"><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">core</span><span class="special">/</span><span class="identifier">point_type</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  98         </p>
  99 <h6>
 100 <a name="geometry.reference.core.point_type.h3"></a>
 101           <span class="phrase"><a name="geometry.reference.core.point_type.complexity"></a></span><a class="link" href="point_type.html#geometry.reference.core.point_type.complexity">Complexity</a>
 102         </h6>
 103 <p>
 104           Compile time
 105         </p>
 106 <h6>
 107 <a name="geometry.reference.core.point_type.h4"></a>
 108           <span class="phrase"><a name="geometry.reference.core.point_type.example"></a></span><a class="link" href="point_type.html#geometry.reference.core.point_type.example">Example</a>
 109         </h6>
 110 <p>
 111           Examine the point type of a multi_polygon
 112         </p>
 113 <p>
 114 </p>
 115 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 116 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">typeinfo</span><span class="special">&gt;</span>
 117
 118 <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>
 119 <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">polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 120 <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_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 121 <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">multi_polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 122
 123 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 124 <span class="special">{</span>
 125     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">point_type</span><span class="special">;</span>
 126     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">polygon</span><span class="special">&lt;</span><span class="identifier">point_type</span><span class="special">&gt;</span> <span class="identifier">polygon_type</span><span class="special">;</span>
 127     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">multi_polygon</span><span class="special">&lt;</span><span class="identifier">polygon_type</span><span class="special">&gt;</span> <span class="identifier">mp_type</span><span class="special">;</span>
 128
 129     <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">point_type</span><span class="special">&lt;</span><span class="identifier">mp_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">ptype</span><span class="special">;</span>
 130
 131     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"point type: "</span> <span class="special">&lt;&lt;</span> <span class="keyword">typeid</span><span class="special">(</span><span class="identifier">ptype</span><span class="special">).</span><span class="identifier">name</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>
 132
 133     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 134 <span class="special">}</span>
 135 </pre>
 136 <p>
 137         </p>
 138 <p>
 139           Output (in MSVC):
 140         </p>
 141 <pre class="programlisting">point type: class boost::geometry::model::d2::point_xy&lt;double,struct boost::geometry::cs::cartesian&gt;
 142 </pre>
 143 </div>
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 145 <td align="left"></td>
 146 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2014 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
 147       Wulkiewicz, Oracle and/or its affiliates<p>
 148         Distributed under the Boost Software License, Version 1.0. (See accompanying
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