GEOS  3.8.0dev
SimpleSweepLineIntersector.h
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15 
16 #ifndef GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
17 #define GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_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 
51 class GEOS_DLL SimpleSweepLineIntersector: public EdgeSetIntersector {
52 
53 public:
54 
56 
57  ~SimpleSweepLineIntersector() override;
58 
59  void computeIntersections(std::vector<Edge*>* edges,
60  SegmentIntersector* si,
61  bool testAllSegments) override;
62 
63  void computeIntersections(std::vector<Edge*>* edges0,
64  std::vector<Edge*>* edges1,
65  SegmentIntersector* si) override;
66 
67 private:
68 
69  void add(std::vector<Edge*>* edges);
70 
71  std::vector<SweepLineEvent*> events;
72 
73  // statistics information
74  int nOverlaps;
75 
76  void add(std::vector<Edge*>* edges, void* edgeSet);
77 
78  void add(Edge* edge, void* edgeSet);
79 
80  void prepareEvents();
81 
82  void computeIntersections(SegmentIntersector* si);
83 
84  void processOverlaps(size_t start, size_t end, SweepLineEvent* ev0,
85  SegmentIntersector* si);
86 };
87 
88 } // namespace geos.geomgraph.index
89 } // namespace geos.geomgraph
90 } // namespace geos
91 
92 #ifdef _MSC_VER
93 #pragma warning(pop)
94 #endif
95 
96 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
97 
Finds all intersections in one or two sets of edges, using a simple x-axis sweepline algorithm...
Definition: SimpleSweepLineIntersector.h:51
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
Definition: geomgraph/Edge.h:66