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<title>BOOST_GEOMETRY_REGISTER_MULTI_POLYGON</title>
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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon"></a><a class="link" href="boost_geometry_register_multi_polygon.html" title="BOOST_GEOMETRY_REGISTER_MULTI_POLYGON">BOOST_GEOMETRY_REGISTER_MULTI_POLYGON</a>
</h5></div></div></div>
<p>
<a class="indexterm" name="idp104922928"></a>
Macro to register a multi_polygon.
</p>
<h6>
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.h0"></a>
<span class="phrase"><a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.description"></a></span><a class="link" href="boost_geometry_register_multi_polygon.html#geometry.reference.adapted.register.boost_geometry_register_multi_polygon.description">Description</a>
</h6>
<p>
The macro BOOST_GEOMETRY_REGISTER_MULTI_POLYGON registers a multi_polygon
such that it is recognized by Boost.Geometry and that Boost.Geometry
functionality can used with the specified type. The multi_polygon may
contain template parameters, which must be specified then.
</p>
<h6>
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.h1"></a>
<span class="phrase"><a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.synopsis"></a></span><a class="link" href="boost_geometry_register_multi_polygon.html#geometry.reference.adapted.register.boost_geometry_register_multi_polygon.synopsis">Synopsis</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_GEOMETRY_REGISTER_MULTI_POLYGON</span><span class="special">(</span><span class="identifier">MultiPolygon</span><span class="special">)</span></pre>
<p>
</p>
<h6>
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.h2"></a>
<span class="phrase"><a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.parameters"></a></span><a class="link" href="boost_geometry_register_multi_polygon.html#geometry.reference.adapted.register.boost_geometry_register_multi_polygon.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody><tr>
<td>
<p>
MultiPolygon
</p>
</td>
<td>
<p>
multi_polygon type to be registered
</p>
</td>
</tr></tbody>
</table></div>
<h6>
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.h3"></a>
<span class="phrase"><a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.header"></a></span><a class="link" href="boost_geometry_register_multi_polygon.html#geometry.reference.adapted.register.boost_geometry_register_multi_polygon.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">geometries</span><span class="special">/</span><span class="keyword">register</span><span class="special">/</span><span class="identifier">multi_polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
</p>
<h6>
<a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.h4"></a>
<span class="phrase"><a name="geometry.reference.adapted.register.boost_geometry_register_multi_polygon.example"></a></span><a class="link" href="boost_geometry_register_multi_polygon.html#geometry.reference.adapted.register.boost_geometry_register_multi_polygon.example">Example</a>
</h6>
<p>
Show the use of the macro BOOST_GEOMETRY_REGISTER_MULTI_POLYGON
</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">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">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="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="keyword">register</span><span class="special">/</span><span class="identifier">multi_polygon</span><span class="special">.</span><span class="identifier">hpp</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">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="special">></span> <span class="identifier">polygon_type</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="identifier">BOOST_GEOMETRY_REGISTER_MULTI_POLYGON</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">polygon_type</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="comment">// Normal usage of std::</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">polygon_type</span><span class="special">></span> <span class="identifier">polygons</span><span class="special">(</span><span class="number">2</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">read_wkt</span><span class="special">(</span><span class="string">"POLYGON((0 0,0 1,1 1,1 0,0 0))"</span><span class="special">,</span> <span class="identifier">polygons</span><span class="special">[</span><span class="number">0</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">read_wkt</span><span class="special">(</span><span class="string">"POLYGON((3 0,3 1,4 1,4 0,3 0))"</span><span class="special">,</span> <span class="identifier">polygons</span><span class="special">[</span><span class="number">1</span><span class="special">]);</span>
<span class="comment">// Usage of Boost.Geometry</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"AREA: "</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">area</span><span class="special">(</span><span class="identifier">polygons</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:
</p>
<pre class="programlisting">AREA: 2
</pre>
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