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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries"></a><a class="link" href="intersects_2_two_geometries.html" title="intersects (two geometries)">intersects
          (two geometries)</a>
</h5></div></div></div>
<p>
            <a class="indexterm" name="id884037"></a>
Checks if two geometries have at least one intersection.
          </p>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h0"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.synopsis"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.synopsis">Synopsis</a>
          </h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Geometry1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry2</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="identifier">intersects</span><span class="special">(</span><span class="identifier">Geometry1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">geometry2</span><span class="special">)</span></pre>
<p>
          </p>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h1"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.parameters"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.parameters">Parameters</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Type
                    </p>
                  </th>
<th>
                    <p>
                      Concept
                    </p>
                  </th>
<th>
                    <p>
                      Name
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody>
<tr>
<td>
                    <p>
                      Geometry1 const &amp;
                    </p>
                  </td>
<td>
                    <p>
                      Any type fulfilling a Geometry Concept
                    </p>
                  </td>
<td>
                    <p>
                      geometry1
                    </p>
                  </td>
<td>
                    <p>
                      A model of the specified concept
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      Geometry2 const &amp;
                    </p>
                  </td>
<td>
                    <p>
                      Any type fulfilling a Geometry Concept
                    </p>
                  </td>
<td>
                    <p>
                      geometry2
                    </p>
                  </td>
<td>
                    <p>
                      A model of the specified concept
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h2"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.returns"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.returns">Returns</a>
          </h6>
<p>
            Returns true if two geometries intersect each other
          </p>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h3"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.header"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.header">Header</a>
          </h6>
<p>
            Either
          </p>
<p>
            <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">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
          </p>
<p>
            Or
          </p>
<p>
            <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">algorithms</span><span class="special">/</span><span class="identifier">intersects</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
          </p>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h4"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.conformance"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.conformance">Conformance</a>
          </h6>
<p>
            The function intersects implements function Intersects from the <a href="http://www.opengeospatial.org/standards/sfa" target="_top">OGC Simple Feature
            Specification</a>.
          </p>
<p>
            The version with one parameter is additional and not described in the
            OGC standard
          </p>
<h6>
<a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.h5"></a>
            <span><a name="geometry.reference.algorithms.intersects.intersects_2_two_geometries.examples"></a></span><a class="link" href="intersects_2_two_geometries.html#geometry.reference.algorithms.intersects.intersects_2_two_geometries.examples">Examples</a>
          </h6>
<p>
            Check if two linestrings intersect each other
          </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>

<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>
<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">linestring</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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>
<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">io</span><span class="special">/</span><span class="identifier">wkt</span><span class="special">/</span><span class="identifier">wkt</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
    <span class="comment">// Calculate the intersects of a cartesian polygon</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">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">P</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">&lt;</span><span class="identifier">P</span><span class="special">&gt;</span> <span class="identifier">line1</span><span class="special">,</span> <span class="identifier">line2</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">"linestring(1 1,2 2,3 3)"</span><span class="special">,</span> <span class="identifier">line1</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">"linestring(2 1,1 2,4 0)"</span><span class="special">,</span> <span class="identifier">line2</span><span class="special">);</span>

    <span class="keyword">bool</span> <span class="identifier">b</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">intersects</span><span class="special">(</span><span class="identifier">line1</span><span class="special">,</span> <span class="identifier">line2</span><span class="special">);</span>

    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Intersects: "</span> <span class="special">&lt;&lt;</span> <span class="special">(</span><span class="identifier">b</span> <span class="special">?</span> <span class="string">"YES"</span> <span class="special">:</span> <span class="string">"NO"</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>

    <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">Intersects: YES
</pre>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2009-2012 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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