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<div class="title">SimpleMCSweepLineIntersector.h</div> </div>
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<a href="SimpleMCSweepLineIntersector_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**********************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * GEOS - Geometry Engine Open Source</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * http://geos.osgeo.org</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Copyright (C) 2005-2006 Refractions Research Inc.</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Copyright (C) 2001-2002 Vivid Solutions Inc.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * This is free software; you can redistribute and/or modify it under</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * by the Free Software Foundation.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * See the COPYING file for more information.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> **********************************************************************/</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#ifndef GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#define GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <<a class="code" href="export_8h.html">geos/export.h</a>></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <<a class="code" href="EdgeSetIntersector_8h.html">geos/geomgraph/index/EdgeSetIntersector.h</a>></span> <span class="comment">// for inheritance</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <<a class="code" href="geomgraph_2index_2SegmentIntersector_8h.html">geos/geomgraph/index/SegmentIntersector.h</a>></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="code" href="geomgraph_2index_2SweepLineEvent_8h.html">geos/geomgraph/index/SweepLineEvent.h</a>></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="code" href="geomgraph_2index_2MonotoneChain_8h.html">geos/geomgraph/index/MonotoneChain.h</a>></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// Forward declarations</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>geomgraph {</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">class </span>Edge;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> }</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> }</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">namespace </span>geomgraph { <span class="comment">// geos::geomgraph</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">namespace </span>index { <span class="comment">// geos::geomgraph::index</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html"> 53</a></span> <span class="keyword">class </span><a class="code" href="export_8h.html#ae36df939090171f6e9a28a8cb6254fea">GEOS_DLL</a> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>: <span class="keyword">public</span> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html">EdgeSetIntersector</a> {</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  ~<a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>() <span class="keyword">override</span> = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordtype">void</span> computeIntersections(std::vector<Edge*>* edges,</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a>* si, <span class="keywordtype">bool</span> testAllSegments) <span class="keyword">override</span>;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">void</span> computeIntersections(std::vector<Edge*>* edges0,</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  std::vector<Edge*>* edges1,</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a>* si) <span class="keyword">override</span>;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">// SweepLineEvents need to refer to each other, and to MonotoneChains.</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// To avoid individually heap-allocating all of these, we store them</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// in deques so that subsequent inserts preserve addresses. However,</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// we also need to sort the SweepLineEvents after they have all been</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// inserted, so we keep a pointer to each event in a separate vector,</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// which can be freely reordered without breaking linkages.</span></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#aacc2ab73e40020ce57af0e29ed38935c"> 76</a></span>  std::vector<SweepLineEvent*> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#aacc2ab73e40020ce57af0e29ed38935c">events</a>;</div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a5f8d4df769255331372e46c3f49db09f"> 77</a></span>  std::deque<SweepLineEvent> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a5f8d4df769255331372e46c3f49db09f">eventStore</a>;</div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#ac5e06ec1b10eb7356bd6c6e2c9c1b641"> 78</a></span>  std::deque<MonotoneChain> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#ac5e06ec1b10eb7356bd6c6e2c9c1b641">chains</a>;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// statistics information</span></div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a924d0196ab1abb6599677d85cb6c2b90"> 81</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a924d0196ab1abb6599677d85cb6c2b90">nOverlaps</a>;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordtype">void</span> add(std::vector<Edge*>* edges);</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">void</span> add(std::vector<Edge*>* edges, <span class="keywordtype">void</span>* edgeSet);</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">void</span> add(<a class="code" href="classgeos_1_1geomgraph_1_1Edge.html">Edge</a>* edge, <span class="keywordtype">void</span>* edgeSet);</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">void</span> prepareEvents();</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">void</span> computeIntersections(<a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a>* si);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">void</span> processOverlaps(<span class="keywordtype">size_t</span> start, <span class="keywordtype">size_t</span> end,</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">SweepLineEvent</a>* ev0,</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">SegmentIntersector</a>* si);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// Declare type as noncopyable</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>& other) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>& operator=(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">SimpleMCSweepLineIntersector</a>& rhs) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> };</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> } <span class="comment">// namespace geos.geomgraph.index</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> } <span class="comment">// namespace geos.geomgraph</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> } <span class="comment">// namespace geos</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="preprocessor">#pragma warning(pop)</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#endif // GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector_html_a924d0196ab1abb6599677d85cb6c2b90"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a924d0196ab1abb6599677d85cb6c2b90">geos::geomgraph::index::SimpleMCSweepLineIntersector::nOverlaps</a></div><div class="ttdeci">int nOverlaps</div><div class="ttdef"><b>Definition:</b> <a href="SimpleMCSweepLineIntersector_8h_source.html#l00081">SimpleMCSweepLineIntersector.h:81</a></div></div>
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<div class="ttc" id="export_8h_html_ae36df939090171f6e9a28a8cb6254fea"><div class="ttname"><a href="export_8h.html#ae36df939090171f6e9a28a8cb6254fea">GEOS_DLL</a></div><div class="ttdeci">#define GEOS_DLL</div><div class="ttdef"><b>Definition:</b> <a href="export_8h_source.html#l00028">export.h:28</a></div></div>
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<div class="ttc" id="EdgeSetIntersector_8h_html"><div class="ttname"><a href="EdgeSetIntersector_8h.html">EdgeSetIntersector.h</a></div></div>
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<div class="ttc" id="export_8h_html"><div class="ttname"><a href="export_8h.html">export.h</a></div></div>
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<div class="ttc" id="geomgraph_2index_2SweepLineEvent_8h_html"><div class="ttname"><a href="geomgraph_2index_2SweepLineEvent_8h.html">SweepLineEvent.h</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector_html"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SegmentIntersector.html">geos::geomgraph::index::SegmentIntersector</a></div><div class="ttdoc">Computes the intersection of line segments, and adds the intersection to the edges containing the seg...</div><div class="ttdef"><b>Definition:</b> <a href="geomgraph_2index_2SegmentIntersector_8h_source.html#l00047">geomgraph/index/SegmentIntersector.h:47</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent_html"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SweepLineEvent.html">geos::geomgraph::index::SweepLineEvent</a></div><div class="ttdef"><b>Definition:</b> <a href="geomgraph_2index_2SweepLineEvent_8h_source.html#l00038">geomgraph/index/SweepLineEvent.h:38</a></div></div>
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<div class="ttc" id="geomgraph_2index_2SegmentIntersector_8h_html"><div class="ttname"><a href="geomgraph_2index_2SegmentIntersector_8h.html">SegmentIntersector.h</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector_html_a5f8d4df769255331372e46c3f49db09f"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#a5f8d4df769255331372e46c3f49db09f">geos::geomgraph::index::SimpleMCSweepLineIntersector::eventStore</a></div><div class="ttdeci">std::deque< SweepLineEvent > eventStore</div><div class="ttdef"><b>Definition:</b> <a href="SimpleMCSweepLineIntersector_8h_source.html#l00077">SimpleMCSweepLineIntersector.h:77</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector_html"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1EdgeSetIntersector.html">geos::geomgraph::index::EdgeSetIntersector</a></div><div class="ttdoc">An EdgeSetIntersector computes all the intersections between the edges in the set. </div><div class="ttdef"><b>Definition:</b> <a href="EdgeSetIntersector_8h_source.html#l00041">EdgeSetIntersector.h:41</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector_html"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html">geos::geomgraph::index::SimpleMCSweepLineIntersector</a></div><div class="ttdoc">Finds all intersections in one or two sets of edges, using an x-axis sweepline algorithm in conjuncti...</div><div class="ttdef"><b>Definition:</b> <a href="SimpleMCSweepLineIntersector_8h_source.html#l00053">SimpleMCSweepLineIntersector.h:53</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector_html_aacc2ab73e40020ce57af0e29ed38935c"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#aacc2ab73e40020ce57af0e29ed38935c">geos::geomgraph::index::SimpleMCSweepLineIntersector::events</a></div><div class="ttdeci">std::vector< SweepLineEvent * > events</div><div class="ttdef"><b>Definition:</b> <a href="SimpleMCSweepLineIntersector_8h_source.html#l00076">SimpleMCSweepLineIntersector.h:76</a></div></div>
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<div class="ttc" id="namespacegeos_html"><div class="ttname"><a href="namespacegeos.html">geos</a></div><div class="ttdoc">Basic namespace for all GEOS functionalities. </div><div class="ttdef"><b>Definition:</b> <a href="IndexedNestedRingTester_8h_source.html#l00026">IndexedNestedRingTester.h:26</a></div></div>
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<div class="ttc" id="geomgraph_2index_2MonotoneChain_8h_html"><div class="ttname"><a href="geomgraph_2index_2MonotoneChain_8h.html">MonotoneChain.h</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector_html_ac5e06ec1b10eb7356bd6c6e2c9c1b641"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1index_1_1SimpleMCSweepLineIntersector.html#ac5e06ec1b10eb7356bd6c6e2c9c1b641">geos::geomgraph::index::SimpleMCSweepLineIntersector::chains</a></div><div class="ttdeci">std::deque< MonotoneChain > chains</div><div class="ttdef"><b>Definition:</b> <a href="SimpleMCSweepLineIntersector_8h_source.html#l00078">SimpleMCSweepLineIntersector.h:78</a></div></div>
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<div class="ttc" id="classgeos_1_1geomgraph_1_1Edge_html"><div class="ttname"><a href="classgeos_1_1geomgraph_1_1Edge.html">geos::geomgraph::Edge</a></div><div class="ttdef"><b>Definition:</b> <a href="geomgraph_2Edge_8h_source.html#l00066">geomgraph/Edge.h:66</a></div></div>
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