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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.core.dimension"></a><a class="link" href="dimension.html" title="dimension">dimension</a> |
| </h4></div></div></div> |
| <p> |
| <a class="indexterm" name="id919697"></a> |
| Metafunction defining <span class="bold"><strong>value</strong></span> as the number |
| of coordinates (the number of axes of any geometry) of the point type making |
| up the specified geometry type. |
| </p> |
| <a name="geometry.reference.core.dimension.synopsis"></a><h6> |
| <a name="geometry.reference.core.dimension.synopsis-heading"></a> |
| <a class="link" href="dimension.html#geometry.reference.core.dimension.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">dimension</span> |
| <span class="special">{</span> |
| <span class="comment">// ...</span> |
| <span class="special">};</span> |
| </pre> |
| <p> |
| </p> |
| <a name="geometry.reference.core.dimension.template_parameter_s_"></a><h6> |
| <a name="geometry.reference.core.dimension.template_parameter_s_-heading"></a> |
| <a class="link" href="dimension.html#geometry.reference.core.dimension.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> |
| <a name="geometry.reference.core.dimension.header"></a><h6> |
| <a name="geometry.reference.core.dimension.header-heading"></a> |
| <a class="link" href="dimension.html#geometry.reference.core.dimension.header">Header</a> |
| </h6> |
| <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_dimension</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <a name="geometry.reference.core.dimension.complexity"></a><h6> |
| <a name="geometry.reference.core.dimension.complexity-heading"></a> |
| <a class="link" href="dimension.html#geometry.reference.core.dimension.complexity">Complexity</a> |
| </h6> |
| <p> |
| Compile time |
| </p> |
| <a name="geometry.reference.core.dimension.example"></a><h6> |
| <a name="geometry.reference.core.dimension.example-heading"></a> |
| <a class="link" href="dimension.html#geometry.reference.core.dimension.example">Example</a> |
| </h6> |
| <p> |
| Examine the number of coordinates making up the points in a linestring |
| type |
| </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">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">linestring</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">adapted</span><span class="special">/</span><span class="identifier">boost_tuple</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| <span class="identifier">BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS</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="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="keyword">int</span> <span class="identifier">dim</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">dimension</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">model</span><span class="special">::</span><span class="identifier">linestring</span> |
| <span class="special"><</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special"><</span><span class="keyword">float</span><span class="special">,</span> <span class="keyword">float</span><span class="special">,</span> <span class="keyword">float</span><span class="special">></span> |
| <span class="special">></span> |
| <span class="special">>::</span><span class="identifier">value</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">"dimensions: "</span> <span class="special"><<</span> <span class="identifier">dim</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: |
| </p> |
| <pre class="programlisting">dimensions: 3 |
| </pre> |
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| <td align="right"><div class="copyright-footer">Copyright © 2011 Barend Gehrels, Bruno Lalande, Mateusz Loskot<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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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