SimpleSweepLineIntersector.h

00001 /**********************************************************************
00002  * $Id: SimpleSweepLineIntersector.h 1820 2006-09-06 16:54:23Z mloskot $
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 <vector>
00021 
00022 #include <geos/geomgraph/index/EdgeSetIntersector.h> // for inheritance
00023 
00024 // Forward declarations
00025 namespace geos {
00026         namespace geomgraph {
00027                 class Edge;
00028                 namespace index {
00029                         class SegmentIntersector;
00030                         class SweepLineEvent;
00031                 }
00032         }
00033 }
00034 
00035 namespace geos {
00036 namespace geomgraph { // geos::geomgraph
00037 namespace index { // geos::geomgraph::index
00038 
00046 class SimpleSweepLineIntersector: public EdgeSetIntersector {
00047 
00048 public:
00049 
00050         SimpleSweepLineIntersector();
00051 
00052         virtual ~SimpleSweepLineIntersector();
00053 
00054         void computeIntersections(std::vector<Edge*> *edges,
00055                         SegmentIntersector *si,
00056                         bool testAllSegments);
00057 
00058         void computeIntersections(std::vector<Edge*> *edges0,
00059                         std::vector<Edge*> *edges1,
00060                         SegmentIntersector *si);
00061 
00062 private:
00063 
00064         void add(std::vector<Edge*> *edges);
00065 
00066         std::vector<SweepLineEvent*> events;
00067 
00068         // statistics information
00069         int nOverlaps;
00070 
00071         void add(std::vector<Edge*> *edges, void* edgeSet);
00072 
00073         void add(Edge *edge,void* edgeSet);
00074 
00075         void prepareEvents();
00076 
00077         void computeIntersections(SegmentIntersector *si);
00078 
00079         void processOverlaps(int start, int end, SweepLineEvent *ev0,
00080                         SegmentIntersector *si);
00081 };
00082 
00083 
00084 
00085 
00086 } // namespace geos.geomgraph.index
00087 } // namespace geos.geomgraph
00088 } // namespace geos
00089 
00090 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
00091 
00092 /**********************************************************************
00093  * $Log$
00094  * Revision 1.1  2006/03/14 12:55:55  strk
00095  * Headers split: geomgraphindex.h, nodingSnapround.h
00096  *
00097  **********************************************************************/
00098 

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