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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.core.coordinate_system"></a><a class="link" href="coordinate_system.html" title="coordinate_system">coordinate_system</a> |
| </h4></div></div></div> |
| <p> |
| <a class="indexterm" name="idp121528192"></a> |
| Metafunction defining <span class="bold"><strong>type</strong></span> as the coordinate |
| system (cartesian, spherical, etc) of the point type making up the specified |
| geometry type. |
| </p> |
| <h6> |
| <a name="geometry.reference.core.coordinate_system.h0"></a> |
| <span class="phrase"><a name="geometry.reference.core.coordinate_system.synopsis"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.synopsis">Synopsis</a> |
| </h6> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">coordinate_system</span> |
| <span class="special">{</span> |
| <span class="comment">// ...</span> |
| <span class="special">};</span> |
| </pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.core.coordinate_system.h1"></a> |
| <span class="phrase"><a name="geometry.reference.core.coordinate_system.template_parameter_s_"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.template_parameter_s_">Template |
| parameter(s)</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Parameter |
| </p> |
| </th> |
| <th> |
| <p> |
| Description |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| typename Geometry |
| </p> |
| </td> |
| <td> |
| <p> |
| Any type fulfilling a Geometry Concept |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <h6> |
| <a name="geometry.reference.core.coordinate_system.h2"></a> |
| <span class="phrase"><a name="geometry.reference.core.coordinate_system.header"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.header">Header</a> |
| </h6> |
| <p> |
| Either |
| </p> |
| <p> |
| <code class="computeroutput"><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></code> |
| </p> |
| <p> |
| Or |
| </p> |
| <p> |
| <code class="computeroutput"><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">core</span><span class="special">/</span><span class="identifier">coordinate_system</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <h6> |
| <a name="geometry.reference.core.coordinate_system.h3"></a> |
| <span class="phrase"><a name="geometry.reference.core.coordinate_system.complexity"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.complexity">Complexity</a> |
| </h6> |
| <p> |
| Compile time |
| </p> |
| <h6> |
| <a name="geometry.reference.core.coordinate_system.h4"></a> |
| <span class="phrase"><a name="geometry.reference.core.coordinate_system.example"></a></span><a class="link" href="coordinate_system.html#geometry.reference.core.coordinate_system.example">Example</a> |
| </h6> |
| <p> |
| Examine the coordinate system of a point |
| </p> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">typeinfo</span><span class="special">></span> |
| |
| <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> |
| <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> |
| <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_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <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"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">point_type</span><span class="special">;</span> |
| <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"><</span><span class="identifier">point_type</span><span class="special">></span> <span class="identifier">polygon_type</span><span class="special">;</span> |
| |
| <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_system</span><span class="special"><</span><span class="identifier">polygon_type</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">system</span><span class="special">;</span> |
| |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"system: "</span> <span class="special"><<</span> <span class="keyword">typeid</span><span class="special">(</span><span class="identifier">system</span><span class="special">).</span><span class="identifier">name</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> |
| |
| <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> |
| <span class="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Output (using MSVC): |
| </p> |
| <pre class="programlisting">system: struct boost::geometry::cs::cartesian |
| </pre> |
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