GEOS  3.4.2
SimpleMCSweepLineIntersector.h
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2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2005-2006 Refractions Research Inc.
7  * Copyright (C) 2001-2002 Vivid Solutions Inc.
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15 
16 #ifndef GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H
17 #define GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H
18 
19 #include <geos/export.h>
20 #include <vector>
21 
22 #include <geos/geomgraph/index/EdgeSetIntersector.h> // for inheritance
23 
24 #ifdef _MSC_VER
25 #pragma warning(push)
26 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
27 #endif
28 
29 // Forward declarations
30 namespace geos {
31  namespace geomgraph {
32  class Edge;
33  namespace index {
34  class SegmentIntersector;
35  class SweepLineEvent;
36  }
37  }
38 }
39 
40 namespace geos {
41 namespace geomgraph { // geos::geomgraph
42 namespace index { // geos::geomgraph::index
43 
53 class GEOS_DLL SimpleMCSweepLineIntersector: public EdgeSetIntersector {
54 
55 public:
56 
58 
60 
61  void computeIntersections(std::vector<Edge*> *edges,
62  SegmentIntersector *si, bool testAllSegments);
63 
64  void computeIntersections(std::vector<Edge*> *edges0,
65  std::vector<Edge*> *edges1,
66  SegmentIntersector *si);
67 
68 protected:
69 
70  std::vector<SweepLineEvent*> events;
71 
72  // statistics information
73  int nOverlaps;
74 
75 private:
76  void add(std::vector<Edge*> *edges);
77 
78  void add(std::vector<Edge*> *edges,void* edgeSet);
79 
80  void add(Edge *edge,void* edgeSet);
81 
82  void prepareEvents();
83 
84  void computeIntersections(SegmentIntersector *si);
85 
86  void processOverlaps(int start, int end,
87  SweepLineEvent *ev0,
88  SegmentIntersector *si);
89 };
90 
91 } // namespace geos.geomgraph.index
92 } // namespace geos.geomgraph
93 } // namespace geos
94 
95 #ifdef _MSC_VER
96 #pragma warning(pop)
97 #endif
98 
99 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLEMCSWEEPLINEINTERSECTOR_H
100 
Finds all intersections in one or two sets of edges, using an x-axis sweepline algorithm in conjuncti...
Definition: SimpleMCSweepLineIntersector.h:53
Definition: geomgraph/Edge.h:66