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<li class="navelem"><a class="el" href="namespacegeos.html">geos</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1geomgraph.html">geomgraph</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1geomgraph_1_1index.html">index</a></li><li class="navelem"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html">SimpleSweepLineIntersector</a></li> </ul>
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<div class="title">geos::geomgraph::index::SimpleSweepLineIntersector Class Reference</div> </div>
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<p>Finds all intersections in one or two sets of edges, using a simple x-axis sweepline algorithm.
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<a href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="SimpleSweepLineIntersector_8h_source.html">SimpleSweepLineIntersector.h</a>></code></p>
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Inheritance diagram for geos::geomgraph::index::SimpleSweepLineIntersector:</div>
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Collaboration diagram for geos::geomgraph::index::SimpleSweepLineIntersector:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:aec9124035bfbe38124f9d14e9e3a44b3"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#aec9124035bfbe38124f9d14e9e3a44b3">SimpleSweepLineIntersector</a> ()</td></tr>
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<tr class="separator:aec9124035bfbe38124f9d14e9e3a44b3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6bf8353e74c5a0939dd45d1d6f1992e0"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a6bf8353e74c5a0939dd45d1d6f1992e0">~SimpleSweepLineIntersector</a> () override</td></tr>
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<tr class="separator:a6bf8353e74c5a0939dd45d1d6f1992e0"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1f9d0e82790825740f766e24568b382b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a1f9d0e82790825740f766e24568b382b">computeIntersections</a> (std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > *edges, <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> *si, bool testAllSegments) override</td></tr>
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<tr class="memdesc:a1f9d0e82790825740f766e24568b382b"><td class="mdescLeft"> </td><td class="mdescRight">Computes all self-intersections between edges in a set of edges, allowing client to choose whether self-intersections are computed. <a href="#a1f9d0e82790825740f766e24568b382b">More...</a><br /></td></tr>
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<tr class="memitem:a2382c39f41325200c17752557f9e6cd2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a2382c39f41325200c17752557f9e6cd2">computeIntersections</a> (std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > *edges0, std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > *edges1, <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> *si) override</td></tr>
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<tr class="memdesc:a2382c39f41325200c17752557f9e6cd2"><td class="mdescLeft"> </td><td class="mdescRight">Computes all mutual intersections between two sets of edges. <a href="#a2382c39f41325200c17752557f9e6cd2">More...</a><br /></td></tr>
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<tr class="inherit_header pub_methods_classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html">geos::geomgraph::index::EdgeSetIntersector</a></td></tr>
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<tr class="memitem:afe1f019f78c952d180b907690ce41374 inherit pub_methods_classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html#afe1f019f78c952d180b907690ce41374">~EdgeSetIntersector</a> ()</td></tr>
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Private Member Functions</h2></td></tr>
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<tr class="memitem:a19fd7a68edd26b749b7067c3798c7133"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a19fd7a68edd26b749b7067c3798c7133">add</a> (std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > *edges)</td></tr>
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<tr class="memitem:ada724160bd430a263e68615aa93f526a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#ada724160bd430a263e68615aa93f526a">add</a> (std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > *edges, void *edgeSet)</td></tr>
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<tr class="memitem:a2dc5c5e79de69f09350aed9e62322098"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a2dc5c5e79de69f09350aed9e62322098">add</a> (<a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> *edge, void *edgeSet)</td></tr>
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<tr class="memitem:a77cece30c77366693233e391e39a1b81"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a77cece30c77366693233e391e39a1b81">prepareEvents</a> ()</td></tr>
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<tr class="memitem:ae74166851b9b4117f30a3daaea287235"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#ae74166851b9b4117f30a3daaea287235">computeIntersections</a> (<a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> *si)</td></tr>
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<tr class="memitem:a1426492e32808fec3c5b55cf209a6fc2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a1426492e32808fec3c5b55cf209a6fc2">processOverlaps</a> (size_t start, size_t end, <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">SweepLineEvent</a> *ev0, <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> *si)</td></tr>
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Private Attributes</h2></td></tr>
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<tr class="memitem:ab482a034d4ab57e070c01e48b7a62f1d"><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">SweepLineEvent</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#ab482a034d4ab57e070c01e48b7a62f1d">events</a></td></tr>
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<tr class="memitem:a5751246f3df08003562064bcca9dfd40"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SimpleSweepLineIntersector.html#a5751246f3df08003562064bcca9dfd40">nOverlaps</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Finds all intersections in one or two sets of edges, using a simple x-axis sweepline algorithm. </p>
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<p>While still O(n^2) in the worst case, this algorithm drastically improves the average-case time. </p>
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<p>Definition at line <a class="el" href="SimpleSweepLineIntersector_8h_source.html#l00051">51</a> of file <a class="el" href="SimpleSweepLineIntersector_8h_source.html">SimpleSweepLineIntersector.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > * </td>
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<td class="memname">void geos::geomgraph::index::SimpleSweepLineIntersector::computeIntersections </td>
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<td>(</td>
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<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > * </td>
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<td class="paramname"><em>edges</em>, </td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> * </td>
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<td class="paramname"><em>si</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">bool </td>
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<td class="paramname"><em>testAllSegments</em> </td>
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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<p>Computes all self-intersections between edges in a set of edges, allowing client to choose whether self-intersections are computed. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">edges</td><td>a list of edges to test for intersections </td></tr>
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<tr><td class="paramname">si</td><td>the <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html" title="Computes the intersection of line segments, and adds the intersection to the edges containing the seg...">SegmentIntersector</a> to use </td></tr>
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<tr><td class="paramname">testAllSegments</td><td>true if self-intersections are to be tested as well </td></tr>
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</dd>
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<p>Implements <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html#abd43078c091d0058c85062d9ae70a0a8">geos::geomgraph::index::EdgeSetIntersector</a>.</p>
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<td class="memname">void geos::geomgraph::index::SimpleSweepLineIntersector::computeIntersections </td>
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<td>(</td>
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<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > * </td>
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<td class="paramname"><em>edges0</em>, </td>
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<td></td>
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<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a> * > * </td>
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<td class="paramname"><em>edges1</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> * </td>
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<td class="paramname"><em>si</em> </td>
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<td>)</td>
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<p>Computes all mutual intersections between two sets of edges. </p>
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<p>Implements <a class="el" href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html#a04f256aee161bbb16d70aec974d00230">geos::geomgraph::index::EdgeSetIntersector</a>.</p>
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<td class="memname">void geos::geomgraph::index::SimpleSweepLineIntersector::computeIntersections </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> * </td>
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<td class="paramname"><em>si</em></td><td>)</td>
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<td class="memname">void geos::geomgraph::index::SimpleSweepLineIntersector::prepareEvents </td>
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<td>(</td>
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<td class="memname">void geos::geomgraph::index::SimpleSweepLineIntersector::processOverlaps </td>
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<td>(</td>
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<td class="paramtype">size_t </td>
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<td class="paramname"><em>start</em>, </td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">SweepLineEvent</a> * </td>
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<td class="paramname"><em>ev0</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a> * </td>
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<td class="paramname"><em>si</em> </td>
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<h2 class="groupheader">Member Data Documentation</h2>
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<td class="memname">std::vector<<a class="el" href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">SweepLineEvent</a>*> geos::geomgraph::index::SimpleSweepLineIntersector::events</td>
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<p>Definition at line <a class="el" href="SimpleSweepLineIntersector_8h_source.html#l00071">71</a> of file <a class="el" href="SimpleSweepLineIntersector_8h_source.html">SimpleSweepLineIntersector.h</a>.</p>
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<td class="memname">int geos::geomgraph::index::SimpleSweepLineIntersector::nOverlaps</td>
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<p>Definition at line <a class="el" href="SimpleSweepLineIntersector_8h_source.html#l00074">74</a> of file <a class="el" href="SimpleSweepLineIntersector_8h_source.html">SimpleSweepLineIntersector.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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<li><a class="el" href="SimpleSweepLineIntersector_8h_source.html">SimpleSweepLineIntersector.h</a></li>
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</ul>
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