GEOS
3.6.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2005-2006 Refractions Research Inc. 00007 * Copyright (C) 2001-2002 Vivid Solutions Inc. 00008 * 00009 * This is free software; you can redistribute and/or modify it under 00010 * the terms of the GNU Lesser General Public Licence as published 00011 * by the Free Software Foundation. 00012 * See the COPYING file for more information. 00013 * 00014 **********************************************************************/ 00015 00016 #ifndef GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H 00017 #define GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H 00018 00019 #include <geos/export.h> 00020 #include <vector> 00021 00022 #include <geos/geomgraph/index/EdgeSetIntersector.h> // for inheritance 00023 00024 #ifdef _MSC_VER 00025 #pragma warning(push) 00026 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class 00027 #endif 00028 00029 // Forward declarations 00030 namespace geos { 00031 namespace geomgraph { 00032 class Edge; 00033 namespace index { 00034 class SegmentIntersector; 00035 class SweepLineEvent; 00036 } 00037 } 00038 } 00039 00040 namespace geos { 00041 namespace geomgraph { // geos::geomgraph 00042 namespace index { // geos::geomgraph::index 00043 00051 class GEOS_DLL SimpleSweepLineIntersector: public EdgeSetIntersector { 00052 00053 public: 00054 00055 SimpleSweepLineIntersector(); 00056 00057 virtual ~SimpleSweepLineIntersector(); 00058 00059 void computeIntersections(std::vector<Edge*> *edges, 00060 SegmentIntersector *si, 00061 bool testAllSegments); 00062 00063 void computeIntersections(std::vector<Edge*> *edges0, 00064 std::vector<Edge*> *edges1, 00065 SegmentIntersector *si); 00066 00067 private: 00068 00069 void add(std::vector<Edge*> *edges); 00070 00071 std::vector<SweepLineEvent*> events; 00072 00073 // statistics information 00074 int nOverlaps; 00075 00076 void add(std::vector<Edge*> *edges, void* edgeSet); 00077 00078 void add(Edge *edge,void* edgeSet); 00079 00080 void prepareEvents(); 00081 00082 void computeIntersections(SegmentIntersector *si); 00083 00084 void processOverlaps(int start, int end, SweepLineEvent *ev0, 00085 SegmentIntersector *si); 00086 }; 00087 00088 } // namespace geos.geomgraph.index 00089 } // namespace geos.geomgraph 00090 } // namespace geos 00091 00092 #ifdef _MSC_VER 00093 #pragma warning(pop) 00094 #endif 00095 00096 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H 00097