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# SegmentIntersector.h

    00001 /**********************************************************************
    00002  * $Id: SegmentIntersector.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_SEGMENTINTERSECTOR_H
    00018 #define GEOS_GEOMGRAPH_INDEX_SEGMENTINTERSECTOR_H
    00019
    00020
    00021 #include <geos/export.h>
    00022 #include <vector>
    00023
    00024 #include <geos/geom/Coordinate.h> // for composition
    00025
    00026 // Forward declarations
    00027 namespace geos {
    00028         namespace algorithm {
    00029                 class LineIntersector;
    00030         }
    00031         namespace geomgraph {
    00032                 class Node;
    00033                 class Edge;
    00034         }
    00035 }
    00036
    00037 namespace geos {
    00038 namespace geomgraph { // geos::geomgraph
    00039 namespace index { // geos::geomgraph::index
    00040
    00041
    00042 class GEOS_DLL SegmentIntersector{
    00043
    00044 private:
    00045
    00050         bool hasIntersectionVar;
    00051
    00052         bool hasProper;
    00053
    00054         bool hasProperInterior;
    00055
    00056         // the proper intersection point found
    00057         geom::Coordinate properIntersectionPoint;
    00058
    00059         algorithm::LineIntersector *li;
    00060
    00061         bool includeProper;
    00062
    00063         bool recordIsolated;
    00064
    00065         //bool isSelfIntersection;
    00066
    00067         //bool intersectionFound;
    00068
    00069         int numIntersections;
    00070
    00072         std::vector<std::vector<Node*>*> bdyNodes;
    00073
    00074         bool isTrivialIntersection(Edge *e0,int segIndex0,Edge *e1, int segIndex1);
    00075
    00076         bool isBoundaryPoint(algorithm::LineIntersector *li,
    00077                         std::vector<std::vector<Node*>*>& tstBdyNodes);
    00078
    00079         bool isBoundaryPoint(algorithm::LineIntersector *li,
    00080                         std::vector<Node*> *tstBdyNodes);
    00081
    00082 public:
    00083
    00084         static bool isAdjacentSegments(int i1,int i2);
    00085
    00086         // testing only
    00087         int numTests;
    00088
    00089         //SegmentIntersector();
    00090
    00091         virtual ~SegmentIntersector() {}
    00092
    00093         SegmentIntersector(algorithm::LineIntersector *newLi,
    00094                         bool newIncludeProper, bool newRecordIsolated)
    00095                 :
    00096                 hasIntersectionVar(false),
    00097                 hasProper(false),
    00098                 hasProperInterior(false),
    00099                 li(newLi),
    00100                 includeProper(newIncludeProper),
    00101                 recordIsolated(newRecordIsolated),
    00102                 numIntersections(0),
    00103                 bdyNodes(2),
    00104                 numTests(0)
    00105         {}
    00106
    00110         void setBoundaryNodes(std::vector<Node*> *bdyNodes0,
    00111                         std::vector<Node*> *bdyNodes1);
    00112
    00113         geom::Coordinate& getProperIntersectionPoint();
    00114
    00115         bool hasIntersection();
    00116
    00117         bool hasProperIntersection();
    00118
    00119         bool hasProperInteriorIntersection();
    00120
    00121         void addIntersections(Edge *e0, int segIndex0, Edge *e1, int segIndex1);
    00122
    00123 };
    00124
    00125
    00126 } // namespace geos.geomgraph.index
    00127 } // namespace geos.geomgraph
    00128 } // namespace geos
    00129
    00130 #endif
    00131
    00132 /**********************************************************************
    00133  * $Log$
    00134  * Revision 1.1  2006/03/14 12:55:55  strk
    00135  * Headers split: geomgraphindex.h, nodingSnapround.h
    00136  *
    00137  **********************************************************************/
    00138