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<a href="#pub-methods">Public Member Functions</a> |
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<h1>geos::operation::distance::DistanceOp Class Reference</h1> </div>
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<!-- doxytag: class="geos::operation::distance::DistanceOp" -->
<p>Find two points on two <a class="el" href="">Geometry</a>s which lie within a given distance, or else are the nearest points on the geometries (in which case this also provides the distance between the geometries).
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="DistanceOp_8h_source.html">DistanceOp.h</a>></code></p>
<p><a href="classgeos_1_1operation_1_1distance_1_1DistanceOp-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#ae4d61a1c477b4e0cf2a1ebbc3d74d0e6">DistanceOp</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g1)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#aa4cde507efc8613942d68b0fe59a01f4">DistanceOp</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g1)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs a <a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html" title="Find two points on two Geometrys which lie within a given distance, or else are the nearest points on...">DistanceOp</a> that computes the distance and nearest points between the two specified geometries. <a href="#aa4cde507efc8613942d68b0fe59a01f4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#acbad8fb1a46246dca20b39ab97073c90">DistanceOp</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g1, double terminateDistance)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs a <a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html" title="Find two points on two Geometrys which lie within a given distance, or else are the nearest points on...">DistanceOp</a> that computes the distance and nearest points between the two specified geometries. <a href="#acbad8fb1a46246dca20b39ab97073c90"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#ac5dec6e433a9d07ed80bd34aadc1dda0">distance</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#a4801797ff9a77a5f765c783795aa04e5">closestPoints</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#ac8a617b7ab80f948351ebf3b7f48932f">nearestPoints</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#ad3462b8ed28b4cd93e2e462937975655">distance</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g1)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute the distance between the nearest points of two geometries. <a href="#ad3462b8ed28b4cd93e2e462937975655"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#a5203d25c59ea0293059db321e0d82763">distance</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g1)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#a99de46033e82abe54143501af7aa1266">isWithinDistance</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g1, double distance)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Test whether two geometries lie within a given distance of each other. <a href="#a99de46033e82abe54143501af7aa1266"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#a33e2c129a201d89c8c5067ca24f0e58d">nearestPoints</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g1)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html#ad898f71d8171b467cb26129cc66f4469">closestPoints</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g0, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *g1)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Find two points on two <a class="el" href="">Geometry</a>s which lie within a given distance, or else are the nearest points on the geometries (in which case this also provides the distance between the geometries). </p>
<p>The distance computation also finds a pair of points in the input geometries which have the minimum distance between them. If a point lies in the interior of a line segment, the coordinate computed is a close approximation to the exact point.</p>
<p>The algorithms used are straightforward O(n^2) comparisons. This worst-case performance could be improved on by using Voronoi techniques or spatial indexes. </p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="ae4d61a1c477b4e0cf2a1ebbc3d74d0e6"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::DistanceOp" ref="ae4d61a1c477b4e0cf2a1ebbc3d74d0e6" args="(const geom::Geometry *g0, const geom::Geometry *g1)" -->
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<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000013">Deprecated:</a></b></dt><dd>use the one taking references </dd></dl>
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<a class="anchor" id="aa4cde507efc8613942d68b0fe59a01f4"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::DistanceOp" ref="aa4cde507efc8613942d68b0fe59a01f4" args="(const geom::Geometry &g0, const geom::Geometry &g1)" -->
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<p>Constructs a <a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html" title="Find two points on two Geometrys which lie within a given distance, or else are the nearest points on...">DistanceOp</a> that computes the distance and nearest points between the two specified geometries. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a Geometry </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>a Geometry </td></tr>
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</dd>
</dl>
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<a class="anchor" id="acbad8fb1a46246dca20b39ab97073c90"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::DistanceOp" ref="acbad8fb1a46246dca20b39ab97073c90" args="(const geom::Geometry &g0, const geom::Geometry &g1, double terminateDistance)" -->
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<td class="paramtype">double </td>
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<p>Constructs a <a class="el" href="classgeos_1_1operation_1_1distance_1_1DistanceOp.html" title="Find two points on two Geometrys which lie within a given distance, or else are the nearest points on...">DistanceOp</a> that computes the distance and nearest points between the two specified geometries. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a Geometry </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>a Geometry </td></tr>
<tr><td valign="top"></td><td valign="top"><em>terminateDistance</em> </td><td>the distance on which to terminate the search </td></tr>
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</dd>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="ad898f71d8171b467cb26129cc66f4469"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::closestPoints" ref="ad898f71d8171b467cb26129cc66f4469" args="(const geom::Geometry *g0, const geom::Geometry *g1)" -->
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<td class="memname">static <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>* geos::operation::distance::DistanceOp::closestPoints </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> * </td>
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<p>Compute the the closest points of two geometries.</p>
<p>The points are presented in the same order as the input Geometries.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a <a class="el" href="">Geometry</a> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>another <a class="el" href="">Geometry</a></td></tr>
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</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the closest points in the geometries, ownership to caller. A NULL return means one of the geometries is empty.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000012">Deprecated:</a></b></dt><dd>renamed to nearestPoints </dd></dl>
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<a class="anchor" id="a4801797ff9a77a5f765c783795aa04e5"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::closestPoints" ref="a4801797ff9a77a5f765c783795aa04e5" args="()" -->
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<td class="memname"><a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>* geos::operation::distance::DistanceOp::closestPoints </td>
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<p>Report the coordinates of the closest points in the input geometries. The points are presented in the same order as the input Geometries.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>a pair of <a class="el" href="">Coordinate</a>s of the closest points as a newly allocated object (ownership to caller)</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000014">Deprecated:</a></b></dt><dd>renamed to nearestPoints </dd></dl>
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<a class="anchor" id="ad3462b8ed28b4cd93e2e462937975655"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::distance" ref="ad3462b8ed28b4cd93e2e462937975655" args="(const geom::Geometry &g0, const geom::Geometry &g1)" -->
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<td class="memname">static double geos::operation::distance::DistanceOp::distance </td>
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<p>Compute the distance between the nearest points of two geometries. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a <a class="el" href="">Geometry</a> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>another <a class="el" href="">Geometry</a> </td></tr>
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</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the distance between the geometries </dd></dl>
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<a class="anchor" id="a5203d25c59ea0293059db321e0d82763"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::distance" ref="a5203d25c59ea0293059db321e0d82763" args="(const geom::Geometry *g0, const geom::Geometry *g1)" -->
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<p>Report the distance between the closest points on the input geometries.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>the distance between the geometries </dd></dl>
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<a class="anchor" id="a99de46033e82abe54143501af7aa1266"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::isWithinDistance" ref="a99de46033e82abe54143501af7aa1266" args="(const geom::Geometry &g0, const geom::Geometry &g1, double distance)" -->
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<td class="memname">static bool geos::operation::distance::DistanceOp::isWithinDistance </td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> & </td>
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<p>Test whether two geometries lie within a given distance of each other. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a <a class="el" href="">Geometry</a> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>another <a class="el" href="">Geometry</a> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>distance</em> </td><td>the distance to test </td></tr>
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<dl class="return"><dt><b>Returns:</b></dt><dd>true if g0.distance(g1) <= distance </dd></dl>
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<a class="anchor" id="ac8a617b7ab80f948351ebf3b7f48932f"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::nearestPoints" ref="ac8a617b7ab80f948351ebf3b7f48932f" args="()" -->
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<td class="memname"><a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>* geos::operation::distance::DistanceOp::nearestPoints </td>
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<p>Report the coordinates of the nearest points in the input geometries. The points are presented in the same order as the input Geometries.</p>
<dl class="return"><dt><b>Returns:</b></dt><dd>a pair of <a class="el" href="">Coordinate</a>s of the nearest points as a newly allocated object (ownership to caller) </dd></dl>
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<a class="anchor" id="a33e2c129a201d89c8c5067ca24f0e58d"></a><!-- doxytag: member="geos::operation::distance::DistanceOp::nearestPoints" ref="a33e2c129a201d89c8c5067ca24f0e58d" args="(const geom::Geometry *g0, const geom::Geometry *g1)" -->
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<td class="memname">static <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>* geos::operation::distance::DistanceOp::nearestPoints </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> * </td>
<td class="paramname"> <em>g0</em>, </td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> * </td>
<td class="paramname"> <em>g1</em></td><td> </td>
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<p>Compute the the nearest points of two geometries.</p>
<p>The points are presented in the same order as the input Geometries.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>g0</em> </td><td>a <a class="el" href="">Geometry</a> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>g1</em> </td><td>another <a class="el" href="">Geometry</a></td></tr>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the nearest points in the geometries, ownership to caller. A NULL return means one of the geometries is empty. </dd></dl>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="DistanceOp_8h_source.html">DistanceOp.h</a></li>
</ul>
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