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# SimpleSweepLineIntersector.h

    00001 /**********************************************************************
    00002  * $Id: SimpleSweepLineIntersector.h 3255 2011-03-01 17:56:10Z 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 <geos/export.h>
    00021 #include <vector>
    00022
    00023 #include <geos/geomgraph/index/EdgeSetIntersector.h> // for inheritance
    00024
    00025 #ifdef _MSC_VER
    00026 #pragma warning(push)
    00027 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00028 #endif
    00029
    00030 // Forward declarations
    00031 namespace geos {
    00032         namespace geomgraph {
    00033                 class Edge;
    00034                 namespace index {
    00035                         class SegmentIntersector;
    00036                         class SweepLineEvent;
    00037                 }
    00038         }
    00039 }
    00040
    00041 namespace geos {
    00042 namespace geomgraph { // geos::geomgraph
    00043 namespace index { // geos::geomgraph::index
    00044
    00052 class GEOS_DLL SimpleSweepLineIntersector: public EdgeSetIntersector {
    00053
    00054 public:
    00055
    00056         SimpleSweepLineIntersector();
    00057
    00058         virtual ~SimpleSweepLineIntersector();
    00059
    00060         void computeIntersections(std::vector<Edge*> *edges,
    00061                         SegmentIntersector *si,
    00062                         bool testAllSegments);
    00063
    00064         void computeIntersections(std::vector<Edge*> *edges0,
    00065                         std::vector<Edge*> *edges1,
    00066                         SegmentIntersector *si);
    00067
    00068 private:
    00069
    00070         void add(std::vector<Edge*> *edges);
    00071
    00072         std::vector<SweepLineEvent*> events;
    00073
    00074         // statistics information
    00075         int nOverlaps;
    00076
    00077         void add(std::vector<Edge*> *edges, void* edgeSet);
    00078
    00079         void add(Edge *edge,void* edgeSet);
    00080
    00081         void prepareEvents();
    00082
    00083         void computeIntersections(SegmentIntersector *si);
    00084
    00085         void processOverlaps(int start, int end, SweepLineEvent *ev0,
    00086                         SegmentIntersector *si);
    00087 };
    00088
    00089 } // namespace geos.geomgraph.index
    00090 } // namespace geos.geomgraph
    00091 } // namespace geos
    00092
    00093 #ifdef _MSC_VER
    00094 #pragma warning(pop)
    00095 #endif
    00096
    00097 #endif // GEOS_GEOMGRAPH_INDEX_SIMPLESWEEPLINEINTERSECTOR_H
    00098
    00099 /**********************************************************************
    00100  * $Log$
    00101  * Revision 1.1  2006/03/14 12:55:55  strk
    00102  * Headers split: geomgraphindex.h, nodingSnapround.h
    00103  *
    00104  **********************************************************************/
    00105