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SimpleSweepLineIntersector.h

00001 /**********************************************************************
00002  * $Id: SimpleSweepLineIntersector.h 2556 2009-06-06 22:22:28Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2005-2006 Refractions Research Inc.
00008  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00009  *
00010  * This is free software; you can redistribute and/or modify it under
00011  * the terms of the GNU Lesser General Public Licence as published
00012  * by the Free Software Foundation. 
00013  * See the COPYING file for more information.
00014  *
00015  **********************************************************************/
00016 
00017 #ifndef GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
00018 #define GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
00019 
00020 #include <geos/export.h>
00021 #include <vector>
00022 
00023 #include <geos/geomgraph/index/EdgeSetIntersector.h> // for inheritance
00024 
00025 // Forward declarations
00026 namespace geos {
00027         namespace geomgraph {
00028                 class Edge;
00029                 namespace index {
00030                         class SegmentIntersector;
00031                         class SweepLineEvent;
00032                 }
00033         }
00034 }
00035 
00036 namespace geos {
00037 namespace geomgraph { // geos::geomgraph
00038 namespace index { // geos::geomgraph::index
00039 
00047 class GEOS_DLL SimpleSweepLineIntersector: public EdgeSetIntersector {
00048 
00049 public:
00050 
00051         SimpleSweepLineIntersector();
00052 
00053         virtual ~SimpleSweepLineIntersector();
00054 
00055         void computeIntersections(std::vector<Edge*> *edges,
00056                         SegmentIntersector *si,
00057                         bool testAllSegments);
00058 
00059         void computeIntersections(std::vector<Edge*> *edges0,
00060                         std::vector<Edge*> *edges1,
00061                         SegmentIntersector *si);
00062 
00063 private:
00064 
00065         void add(std::vector<Edge*> *edges);
00066 
00067         std::vector<SweepLineEvent*> events;
00068 
00069         // statistics information
00070         int nOverlaps;
00071 
00072         void add(std::vector<Edge*> *edges, void* edgeSet);
00073 
00074         void add(Edge *edge,void* edgeSet);
00075 
00076         void prepareEvents();
00077 
00078         void computeIntersections(SegmentIntersector *si);
00079 
00080         void processOverlaps(int start, int end, SweepLineEvent *ev0,
00081                         SegmentIntersector *si);
00082 };
00083 
00084 
00085 
00086 
00087 } // namespace geos.geomgraph.index
00088 } // namespace geos.geomgraph
00089 } // namespace geos
00090 
00091 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
00092 
00093 /**********************************************************************
00094  * $Log$
00095  * Revision 1.1  2006/03/14 12:55:55  strk
00096  * Headers split: geomgraphindex.h, nodingSnapround.h
00097  *
00098  **********************************************************************/
00099 

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