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<title>GEOS: geos::geom::prep::PreparedPolygonCovers Class Reference</title>
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<li><b>prep</b> </li>
<li><a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html">geos::geom::prep::PreparedPolygonCovers</a> </li>
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<a href="#pub-methods">Public Member Functions</a> |
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<h1>geos::geom::prep::PreparedPolygonCovers Class Reference</h1> </div>
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<!-- doxytag: class="geos::geom::prep::PreparedPolygonCovers" --><!-- doxytag: inherits="geos::geom::prep::AbstractPreparedPolygonContains" -->
<p>Computes the <code>covers</code> spatial relationship predicate for a <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> relative to all other <a class="el" href="classgeos_1_1geom_1_1Geometry.html">Geometry</a> classes.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="PreparedPolygonCovers_8h_source.html">PreparedPolygonCovers.h</a>></code></p>
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Inheritance diagram for geos::geom::prep::PreparedPolygonCovers:</div>
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<img src="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.png" usemap="#geos::geom::prep::PreparedPolygonCovers_map" alt=""/>
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<area href="classgeos_1_1geom_1_1prep_1_1AbstractPreparedPolygonContains.html" alt="geos::geom::prep::AbstractPreparedPolygonContains" shape="rect" coords="0,56,308,80"/>
<area href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonPredicate.html" alt="geos::geom::prep::PreparedPolygonPredicate" shape="rect" coords="0,0,308,24"/>
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<p><a href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers-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_1geom_1_1prep_1_1PreparedPolygonCovers.html#ae65809a6840e49622447bc9f593db691">PreparedPolygonCovers</a> (const <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> *const prep)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html#a77005a8073696363374c1284f18b219f">covers</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">Geometry</a> *geom)</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 bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html#a161ea51c4ececd4854b92927a56945f3">covers</a> (const <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> *const prep, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *geom)</td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html#a8754efdeab8ef963a865ae535a9df0f3">fullTopologicalPredicate</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> *geom)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Computes the <code>covers</code> spatial relationship predicate for a <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> relative to all other <a class="el" href="classgeos_1_1geom_1_1Geometry.html">Geometry</a> classes. </p>
<p>Uses short-circuit tests and indexing to improve performance.</p>
<p>It is not possible to short-circuit in all cases, in particular in the case where the test geometry touches the polygon linework. In this case full topology must be computed.</p>
<dl class="author"><dt><b>Author:</b></dt><dd>Martin Davis </dd></dl>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="ae65809a6840e49622447bc9f593db691"></a><!-- doxytag: member="geos::geom::prep::PreparedPolygonCovers::PreparedPolygonCovers" ref="ae65809a6840e49622447bc9f593db691" args="(const PreparedPolygon *const prep)" -->
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<td class="memname">geos::geom::prep::PreparedPolygonCovers::PreparedPolygonCovers </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> *const </td>
<td class="paramname"> <em>prep</em></td>
<td> ) </td>
<td><code> [inline]</code></td>
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<p>Creates an instance of this operation.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>prepPoly</em> </td><td>the <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html" title="A prepared version of Polygon or MultiPolygon geometries.">PreparedPolygon</a> to evaluate </td></tr>
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</dd>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a161ea51c4ececd4854b92927a56945f3"></a><!-- doxytag: member="geos::geom::prep::PreparedPolygonCovers::covers" ref="a161ea51c4ececd4854b92927a56945f3" args="(const PreparedPolygon *const prep, const geom::Geometry *geom)" -->
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<td class="memname">static bool geos::geom::prep::PreparedPolygonCovers::covers </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> *const </td>
<td class="paramname"> <em>prep</em>, </td>
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<td class="paramkey"></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>geom</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline, static]</code></td>
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<p>Computes the covers predicate between a <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html">PreparedPolygon</a> and a <a class="el" href="classgeos_1_1geom_1_1Geometry.html">Geometry</a>.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>prep</em> </td><td>the prepared polygon </td></tr>
<tr><td valign="top"></td><td valign="top"><em>geom</em> </td><td>a test geometry </td></tr>
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</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd>true if the polygon covers the geometry </dd></dl>
<p>References <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html#a161ea51c4ececd4854b92927a56945f3">covers()</a>.</p>
<p>Referenced by <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygonCovers.html#a161ea51c4ececd4854b92927a56945f3">covers()</a>.</p>
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<a class="anchor" id="a77005a8073696363374c1284f18b219f"></a><!-- doxytag: member="geos::geom::prep::PreparedPolygonCovers::covers" ref="a77005a8073696363374c1284f18b219f" args="(const Geometry *geom)" -->
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<td class="memname">bool geos::geom::prep::PreparedPolygonCovers::covers </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">Geometry</a> * </td>
<td class="paramname"> <em>geom</em></td>
<td> ) </td>
<td><code> [inline]</code></td>
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<p>Tests whether this <a class="el" href="classgeos_1_1geom_1_1prep_1_1PreparedPolygon.html" title="A prepared version of Polygon or MultiPolygon geometries.">PreparedPolygon</a> <code>covers</code> a given geometry.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>geom</em> </td><td>the test geometry </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>true if the test geometry is covered </dd></dl>
<p>References <a class="el" href="classgeos_1_1geom_1_1prep_1_1AbstractPreparedPolygonContains.html#a40a340530e4d7ebf07a731258497a357">geos::geom::prep::AbstractPreparedPolygonContains::eval()</a>.</p>
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<a class="anchor" id="a8754efdeab8ef963a865ae535a9df0f3"></a><!-- doxytag: member="geos::geom::prep::PreparedPolygonCovers::fullTopologicalPredicate" ref="a8754efdeab8ef963a865ae535a9df0f3" args="(const geom::Geometry *geom)" -->
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<td class="memname">bool geos::geom::prep::PreparedPolygonCovers::fullTopologicalPredicate </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>geom</em></td>
<td> ) </td>
<td><code> [protected, virtual]</code></td>
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<p>Computes the full topological <code>covers</code> predicate. Used when short-circuit tests are not conclusive.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>geom</em> </td><td>the test geometry </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>true if this prepared polygon covers the test geometry </dd></dl>
<p>Implements <a class="el" href="classgeos_1_1geom_1_1prep_1_1AbstractPreparedPolygonContains.html#ae0fba49106f225fd7399605437560823">geos::geom::prep::AbstractPreparedPolygonContains</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="PreparedPolygonCovers_8h_source.html">PreparedPolygonCovers.h</a></li>
</ul>
</div>
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