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<title>GEOS: geos::operation::overlay::MaximalEdgeRing Class Reference</title>
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<h1>geos::operation::overlay::MaximalEdgeRing Class Reference</h1> </div>
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<!-- doxytag: class="geos::operation::overlay::MaximalEdgeRing" --><!-- doxytag: inherits="geos::geomgraph::EdgeRing" -->
<p>A ring of <a class="el" href="">edges</a> which may contain nodes of degree > 2.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="MaximalEdgeRing_8h_source.html">MaximalEdgeRing.h</a>></code></p>
<p>Inherits geos::geomgraph::EdgeRing.</p>
<p><a href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing-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"><a class="anchor" id="acb8e7851699d1ef86ab4a2e44699e441"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::MaximalEdgeRing" ref="acb8e7851699d1ef86ab4a2e44699e441" args="(geomgraph::DirectedEdge *start, const geom::GeometryFactory *geometryFactory)" -->
</td><td class="memItemRight" valign="bottom"><b>MaximalEdgeRing</b> (<a class="el" href="classgeos_1_1geomgraph_1_1DirectedEdge.html">geomgraph::DirectedEdge</a> *start, const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> *geometryFactory)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab6cbbd9ad37c0b306bdef7c7fad67e0a"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::getNext" ref="ab6cbbd9ad37c0b306bdef7c7fad67e0a" args="(geomgraph::DirectedEdge *de)" -->
<a class="el" href="classgeos_1_1geomgraph_1_1DirectedEdge.html">geomgraph::DirectedEdge</a> * </td><td class="memItemRight" valign="bottom"><b>getNext</b> (<a class="el" href="classgeos_1_1geomgraph_1_1DirectedEdge.html">geomgraph::DirectedEdge</a> *de)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3933ba4a44f6089f3b12080f60252b31"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::setEdgeRing" ref="a3933ba4a44f6089f3b12080f60252b31" args="(geomgraph::DirectedEdge *de, geomgraph::EdgeRing *er)" -->
void </td><td class="memItemRight" valign="bottom"><b>setEdgeRing</b> (<a class="el" href="classgeos_1_1geomgraph_1_1DirectedEdge.html">geomgraph::DirectedEdge</a> *de, geomgraph::EdgeRing *er)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html">MinimalEdgeRing</a> * > * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html#aabc9d5b8faf5650078b1b8e1ed0a3421">buildMinimalRings</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This function returns a newly allocated vector of pointers to newly allocated <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html" title="A ring of Edges with the property that no node has degree greater than 2.">MinimalEdgeRing</a> objects. <a href="#aabc9d5b8faf5650078b1b8e1ed0a3421"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7fd72864bada5baccd4b4da631515258"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::buildMinimalRings" ref="a7fd72864bada5baccd4b4da631515258" args="(std::vector< MinimalEdgeRing * > &minEdgeRings)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html#a7fd72864bada5baccd4b4da631515258">buildMinimalRings</a> (std::vector< <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html">MinimalEdgeRing</a> * > &minEdgeRings)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This function pushes pointers to newly allocated <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html" title="A ring of Edges with the property that no node has degree greater than 2.">MinimalEdgeRing</a> objects to the provided vector. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa30c33b4c4c2572e6dccbf9cb0002b08"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::buildMinimalRings" ref="aa30c33b4c4c2572e6dccbf9cb0002b08" args="(std::vector< EdgeRing * > &minEdgeRings)" -->
void </td><td class="memItemRight" valign="bottom"><b>buildMinimalRings</b> (std::vector< EdgeRing * > &minEdgeRings)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7513d8e3882bde386e700fecfe3c055a"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::linkDirectedEdgesForMinimalEdgeRings" ref="a7513d8e3882bde386e700fecfe3c055a" args="()" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html#a7513d8e3882bde386e700fecfe3c055a">linkDirectedEdgesForMinimalEdgeRings</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">For all nodes in this EdgeRing, link the DirectedEdges at the node to form minimalEdgeRings. <br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>A ring of <a class="el" href="">edges</a> which may contain nodes of degree > 2. </p>
<p>A <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html" title="A ring of edges which may contain nodes of degree > 2.">MaximalEdgeRing</a> may represent two different spatial entities:</p>
<ul>
<li>a single polygon possibly containing inversions (if the ring is oriented CW)</li>
<li>a single hole possibly containing exversions (if the ring is oriented CCW)</li>
</ul>
<p>If the <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html" title="A ring of edges which may contain nodes of degree > 2.">MaximalEdgeRing</a> represents a polygon, the interior of the polygon is strongly connected.</p>
<p>These are the form of rings used to define polygons under some spatial data models. However, under the OGC SFS model, <a class="el" href="">MinimalEdgeRings</a> are required. A <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html" title="A ring of edges which may contain nodes of degree > 2.">MaximalEdgeRing</a> can be converted to a list of MinimalEdgeRings using the <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MaximalEdgeRing.html#aabc9d5b8faf5650078b1b8e1ed0a3421">buildMinimalRings()</a> method.</p>
<dl class="see"><dt><b>See also:</b></dt><dd>com.vividsolutions.jts.operation.overlay.MinimalEdgeRing </dd></dl>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="aabc9d5b8faf5650078b1b8e1ed0a3421"></a><!-- doxytag: member="geos::operation::overlay::MaximalEdgeRing::buildMinimalRings" ref="aabc9d5b8faf5650078b1b8e1ed0a3421" args="()" -->
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<td class="memname">std::vector<<a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html">MinimalEdgeRing</a>*>* geos::operation::overlay::MaximalEdgeRing::buildMinimalRings </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>This function returns a newly allocated vector of pointers to newly allocated <a class="el" href="classgeos_1_1operation_1_1overlay_1_1MinimalEdgeRing.html" title="A ring of Edges with the property that no node has degree greater than 2.">MinimalEdgeRing</a> objects. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000019">Deprecated:</a></b></dt><dd>pass the vector yourself instead </dd></dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="MaximalEdgeRing_8h_source.html">MaximalEdgeRing.h</a></li>
</ul>
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