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| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.algorithms.equals"></a><a class="link" href="equals.html" title="equals">equals</a> |
| </h4></div></div></div> |
| <p> |
| <a class="indexterm" name="idp113075008"></a> |
| Checks if a geometry are spatially equal. |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h0"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.description"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.description">Description</a> |
| </h6> |
| <p> |
| The free function equals checks if the first geometry is spatially equal |
| the second geometry. Spatially equal means that the same point set is included. |
| A box can therefore be spatially equal to a ring or a polygon, or a linestring |
| can be spatially equal to a multi-linestring or a segment. This only works |
| theoretically, not all combinations are implemented yet. |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h1"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.synopsis"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.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">Geometry1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry2</span><span class="special">></span> |
| <span class="keyword">bool</span> <span class="identifier">equals</span><span class="special">(</span><span class="identifier">Geometry1</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry2</span><span class="special">)</span></pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h2"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.parameters"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.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 & |
| </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 & |
| </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.equals.h3"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.returns"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.returns">Returns</a> |
| </h6> |
| <p> |
| Returns true if two geometries are spatially equal |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h4"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.header"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.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">algorithms</span><span class="special">/</span><span class="identifier">equals</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h5"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.conformance"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.conformance">Conformance</a> |
| </h6> |
| <p> |
| The function equals implements function Equals from the <a href="http://www.opengeospatial.org/standards/sfa" target="_top">OGC |
| Simple Feature Specification</a>. |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h6"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.supported_geometries"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.supported_geometries">Supported |
| geometries</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
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| </colgroup> |
| <thead><tr> |
| <th> |
| </th> |
| <th> |
| <p> |
| Point |
| </p> |
| </th> |
| <th> |
| <p> |
| Segment |
| </p> |
| </th> |
| <th> |
| <p> |
| Box |
| </p> |
| </th> |
| <th> |
| <p> |
| Linestring |
| </p> |
| </th> |
| <th> |
| <p> |
| Ring |
| </p> |
| </th> |
| <th> |
| <p> |
| Polygon |
| </p> |
| </th> |
| <th> |
| <p> |
| MultiPoint |
| </p> |
| </th> |
| <th> |
| <p> |
| MultiLinestring |
| </p> |
| </th> |
| <th> |
| <p> |
| MultiPolygon |
| </p> |
| </th> |
| <th> |
| <p> |
| Variant |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| Point |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
| </td> |
| <td> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <td> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Segment |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
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| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Box |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| </p> |
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| <td> |
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| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Linestring |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| </p> |
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| </tr> |
| <tr> |
| <td> |
| <p> |
| Ring |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
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| </p> |
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| </tr> |
| <tr> |
| <td> |
| <p> |
| Polygon |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| MultiPoint |
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| <tr> |
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| <p> |
| MultiLinestring |
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| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| MultiPolygon |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
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| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| Variant |
| </p> |
| </td> |
| <td> |
| <p> |
| <span class="inlinemediaobject"><img src="../../../img/nyi.png" alt="nyi"></span> |
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| <p> |
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| </p> |
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| <p> |
| <span class="inlinemediaobject"><img src="../../../img/ok.png" alt="ok"></span> |
| </p> |
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| </table></div> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h7"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.complexity"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.complexity">Complexity</a> |
| </h6> |
| <p> |
| Linear |
| </p> |
| <h6> |
| <a name="geometry.reference.algorithms.equals.h8"></a> |
| <span class="phrase"><a name="geometry.reference.algorithms.equals.example"></a></span><a class="link" href="equals.html#geometry.reference.algorithms.equals.example">Example</a> |
| </h6> |
| <p> |
| Shows the predicate equals, which returns true if two geometries are spatially |
| equal |
| </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="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="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">assign</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">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">assign</span><span class="special">::</span><span class="identifier">tuple_list_of</span><span class="special">;</span> |
| |
| <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">point</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">polygon</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">poly1</span><span class="special">,</span> <span class="identifier">poly2</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">exterior_ring</span><span class="special">(</span><span class="identifier">poly1</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">0</span><span class="special">,</span> <span class="number">5</span><span class="special">)(</span><span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">)(</span><span class="number">5</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">0</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">exterior_ring</span><span class="special">(</span><span class="identifier">poly2</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">5</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">0</span><span class="special">,</span> <span class="number">5</span><span class="special">)(</span><span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">)(</span><span class="number">5</span><span class="special">,</span> <span class="number">0</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">"polygons are spatially "</span> |
| <span class="special"><<</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">equals</span><span class="special">(</span><span class="identifier">poly1</span><span class="special">,</span> <span class="identifier">poly2</span><span class="special">)</span> <span class="special">?</span> <span class="string">"equal"</span> <span class="special">:</span> <span class="string">"not equal"</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="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">box</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">box</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">assign_values</span><span class="special">(</span><span class="identifier">box</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">5</span><span class="special">,</span> <span class="number">5</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">"polygon and box are spatially "</span> |
| <span class="special"><<</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">equals</span><span class="special">(</span><span class="identifier">box</span><span class="special">,</span> <span class="identifier">poly2</span><span class="special">)</span> <span class="special">?</span> <span class="string">"equal"</span> <span class="special">:</span> <span class="string">"not equal"</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">polygons are spatially equal |
| polygon and box are spatially equal |
| </pre> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2009-2015 Barend Gehrels, Bruno Lalande, |
| Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<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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