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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