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

   1 <html>
   2 <head>
   3 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
   4 <title>coordinate_type</title>
   5 <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
   6 <meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
   7 <link rel="home" href="../../../index.html" title="Chapter&#160;1.&#160;Geometry">
   8 <link rel="up" href="../core.html" title="Core Metafunctions">
   9 <link rel="prev" href="coordinate_system.html" title="coordinate_system">
  10 <link rel="next" href="cs_tag.html" title="cs_tag">
  11 </head>
  12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  13 <table cellpadding="2" width="100%"><tr>
  14 <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
  15 <td align="center"><a href="../../../../../../../index.html">Home</a></td>
  16 <td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
  17 <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
  18 <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
  19 <td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
  20 </tr></table>
  21 <hr>
  22 <div class="spirit-nav">
  23 <a accesskey="p" href="coordinate_system.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../core.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="cs_tag.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
  24 </div>
  25 <div class="section">
  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="geometry.reference.core.coordinate_type"></a><a class="link" href="coordinate_type.html" title="coordinate_type">coordinate_type</a>
  28 </h4></div></div></div>
  29 <p>
  30           <a class="indexterm" name="idp108663888"></a>
  31 Metafunction defining <span class="bold"><strong>type</strong></span> as the coordinate
  32           type (int, float, double, etc) of the point type making up the specified
  33           geometry type.
  34         </p>
  35 <h6>
  36 <a name="geometry.reference.core.coordinate_type.h0"></a>
  37           <span class="phrase"><a name="geometry.reference.core.coordinate_type.synopsis"></a></span><a class="link" href="coordinate_type.html#geometry.reference.core.coordinate_type.synopsis">Synopsis</a>
  38         </h6>
  39 <p>
  40 </p>
  41 <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>
  42 <span class="keyword">struct</span> <span class="identifier">coordinate_type</span>
  43 <span class="special">{</span>
  44   <span class="comment">// ...</span>
  45 <span class="special">};</span>
  46 </pre>
  47 <p>
  48         </p>
  49 <h6>
  50 <a name="geometry.reference.core.coordinate_type.h1"></a>
  51           <span class="phrase"><a name="geometry.reference.core.coordinate_type.template_parameter_s_"></a></span><a class="link" href="coordinate_type.html#geometry.reference.core.coordinate_type.template_parameter_s_">Template
  52           parameter(s)</a>
  53         </h6>
  54 <div class="informaltable"><table class="table">
  55 <colgroup>
  56 <col>
  57 <col>
  58 </colgroup>
  59 <thead><tr>
  60 <th>
  61                   <p>
  62                     Parameter
  63                   </p>
  64                 </th>
  65 <th>
  66                   <p>
  67                     Description
  68                   </p>
  69                 </th>
  70 </tr></thead>
  71 <tbody><tr>
  72 <td>
  73                   <p>
  74                     typename Geometry
  75                   </p>
  76                 </td>
  77 <td>
  78                   <p>
  79                     Any type fulfilling a Geometry Concept
  80                   </p>
  81                 </td>
  82 </tr></tbody>
  83 </table></div>
  84 <h6>
  85 <a name="geometry.reference.core.coordinate_type.h2"></a>
  86           <span class="phrase"><a name="geometry.reference.core.coordinate_type.header"></a></span><a class="link" href="coordinate_type.html#geometry.reference.core.coordinate_type.header">Header</a>
  87         </h6>
  88 <p>
  89           Either
  90         </p>
  91 <p>
  92           <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>
  93         </p>
  94 <p>
  95           Or
  96         </p>
  97 <p>
  98           <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">coordinate_type</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  99         </p>
 100 <h6>
 101 <a name="geometry.reference.core.coordinate_type.h3"></a>
 102           <span class="phrase"><a name="geometry.reference.core.coordinate_type.complexity"></a></span><a class="link" href="coordinate_type.html#geometry.reference.core.coordinate_type.complexity">Complexity</a>
 103         </h6>
 104 <p>
 105           Compile time
 106         </p>
 107 <h6>
 108 <a name="geometry.reference.core.coordinate_type.h4"></a>
 109           <span class="phrase"><a name="geometry.reference.core.coordinate_type.example"></a></span><a class="link" href="coordinate_type.html#geometry.reference.core.coordinate_type.example">Example</a>
 110         </h6>
 111 <p>
 112           Examine the coordinate type of a point
 113         </p>
 114 <p>
 115 </p>
 116 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 117 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">typeinfo</span><span class="special">&gt;</span>
 118
 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">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">polygon</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">point_xy</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
 128     <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">coordinate_type</span><span class="special">&lt;</span><span class="identifier">polygon_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">ctype</span><span class="special">;</span>
 129
 130     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"type: "</span> <span class="special">&lt;&lt;</span> <span class="keyword">typeid</span><span class="special">(</span><span class="identifier">ctype</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>
 131
 132     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 133 <span class="special">}</span>
 134 </pre>
 135 <p>
 136         </p>
 137 <p>
 138           Output (using MSVC):
 139         </p>
 140 <pre class="programlisting">type: double
 141 </pre>
 142 </div>
 143 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 144 <td align="left"></td>
 145 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2017 Barend
 146       Gehrels, Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its
 147       affiliates<p>
 148         Distributed under the Boost Software License, Version 1.0. (See accompanying
 149         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>)
 150       </p>
 151 </div></td>
 152 </tr></table>
 153 <hr>
 154 <div class="spirit-nav">
 155 <a accesskey="p" href="coordinate_system.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../core.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="cs_tag.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
 156 </div>
 157 </body>
 158 </html>