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# SegmentIntersector.h

    00001 /**********************************************************************
    00002  * $Id: SegmentIntersector.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_SEGMENTINTERSECTOR_H
    00018 #define GEOS_GEOMGRAPH_INDEX_SEGMENTINTERSECTOR_H
    00019
    00020 #include <geos/export.h>
    00021 #include <vector>
    00022
    00023 #include <geos/geom/Coordinate.h> // for composition
    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 algorithm {
    00033                 class LineIntersector;
    00034         }
    00035         namespace geomgraph {
    00036                 class Node;
    00037                 class Edge;
    00038         }
    00039 }
    00040
    00041 namespace geos {
    00042 namespace geomgraph { // geos::geomgraph
    00043 namespace index { // geos::geomgraph::index
    00044
    00045
    00046 class GEOS_DLL SegmentIntersector{
    00047
    00048 private:
    00049
    00054         bool hasIntersectionVar;
    00055
    00056         bool hasProper;
    00057
    00058         bool hasProperInterior;
    00059
    00060         // the proper intersection point found
    00061         geom::Coordinate properIntersectionPoint;
    00062
    00063         algorithm::LineIntersector *li;
    00064
    00065         bool includeProper;
    00066
    00067         bool recordIsolated;
    00068
    00069         //bool isSelfIntersection;
    00070
    00071         //bool intersectionFound;
    00072
    00073         int numIntersections;
    00074
    00076         std::vector<std::vector<Node*>*> bdyNodes;
    00077
    00078         bool isTrivialIntersection(Edge *e0,int segIndex0,Edge *e1, int segIndex1);
    00079
    00080         bool isBoundaryPoint(algorithm::LineIntersector *li,
    00081                         std::vector<std::vector<Node*>*>& tstBdyNodes);
    00082
    00083         bool isBoundaryPoint(algorithm::LineIntersector *li,
    00084                         std::vector<Node*> *tstBdyNodes);
    00085
    00086 public:
    00087
    00088         static bool isAdjacentSegments(int i1,int i2);
    00089
    00090         // testing only
    00091         int numTests;
    00092
    00093         //SegmentIntersector();
    00094
    00095         virtual ~SegmentIntersector() {}
    00096
    00097         SegmentIntersector(algorithm::LineIntersector *newLi,
    00098                         bool newIncludeProper, bool newRecordIsolated)
    00099                 :
    00100                 hasIntersectionVar(false),
    00101                 hasProper(false),
    00102                 hasProperInterior(false),
    00103                 li(newLi),
    00104                 includeProper(newIncludeProper),
    00105                 recordIsolated(newRecordIsolated),
    00106                 numIntersections(0),
    00107                 bdyNodes(2),
    00108                 numTests(0)
    00109         {}
    00110
    00114         void setBoundaryNodes(std::vector<Node*> *bdyNodes0,
    00115                         std::vector<Node*> *bdyNodes1);
    00116
    00117         geom::Coordinate& getProperIntersectionPoint();
    00118
    00119         bool hasIntersection();
    00120
    00121         bool hasProperIntersection();
    00122
    00123         bool hasProperInteriorIntersection();
    00124
    00125         void addIntersections(Edge *e0, int segIndex0, Edge *e1, int segIndex1);
    00126
    00127 };
    00128
    00129 } // namespace geos.geomgraph.index
    00130 } // namespace geos.geomgraph
    00131 } // namespace geos
    00132
    00133 #ifdef _MSC_VER
    00134 #pragma warning(pop)
    00135 #endif
    00136
    00137 #endif
    00138
    00139 /**********************************************************************
    00140  * $Log$
    00141  * Revision 1.1  2006/03/14 12:55:55  strk
    00142  * Headers split: geomgraphindex.h, nodingSnapround.h
    00143  *
    00144  **********************************************************************/
    00145