SegmentIntersector.h

00001 /**********************************************************************
00002  * $Id: SegmentIntersector.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_SEGMENTINTERSECTOR_H
00018 #define GEOS_GEOMGRAPH_INDEX_SEGMENTINTERSECTOR_H
00019 
00020 #include <vector>
00021 
00022 #include <geos/geom/Coordinate.h> // for composition
00023 
00024 // Forward declarations
00025 namespace geos {
00026         namespace algorithm {
00027                 class LineIntersector;
00028         }
00029         namespace geomgraph {
00030                 class Node;
00031                 class Edge;
00032         }
00033 }
00034 
00035 namespace geos {
00036 namespace geomgraph { // geos::geomgraph
00037 namespace index { // geos::geomgraph::index
00038 
00039 
00040 class SegmentIntersector{
00041 
00042 private:
00043 
00048         bool hasIntersectionVar;
00049 
00050         bool hasProper;
00051 
00052         bool hasProperInterior;
00053 
00054         // the proper intersection point found
00055         geom::Coordinate properIntersectionPoint;
00056 
00057         algorithm::LineIntersector *li;
00058 
00059         bool includeProper;
00060 
00061         bool recordIsolated;
00062 
00063         //bool isSelfIntersection;
00064 
00065         //bool intersectionFound;
00066 
00067         int numIntersections;
00068 
00070         std::vector<std::vector<Node*>*> bdyNodes;
00071 
00072         bool isTrivialIntersection(Edge *e0,int segIndex0,Edge *e1, int segIndex1);
00073 
00074         bool isBoundaryPoint(algorithm::LineIntersector *li,
00075                         std::vector<std::vector<Node*>*>& tstBdyNodes);
00076 
00077         bool isBoundaryPoint(algorithm::LineIntersector *li,
00078                         std::vector<Node*> *tstBdyNodes);
00079 
00080 public:
00081 
00082         static bool isAdjacentSegments(int i1,int i2);
00083 
00084         // testing only
00085         int numTests;
00086 
00087         //SegmentIntersector();
00088 
00089         virtual ~SegmentIntersector() {}
00090 
00091         SegmentIntersector(algorithm::LineIntersector *newLi,
00092                         bool newIncludeProper, bool newRecordIsolated)
00093                 :
00094                 hasIntersectionVar(false),
00095                 hasProper(false),
00096                 hasProperInterior(false),
00097                 li(newLi),
00098                 includeProper(newIncludeProper),
00099                 recordIsolated(newRecordIsolated),
00100                 numIntersections(0),
00101                 bdyNodes(2),
00102                 numTests(0)
00103         {}
00104 
00108         void setBoundaryNodes(std::vector<Node*> *bdyNodes0,
00109                         std::vector<Node*> *bdyNodes1);
00110 
00111         geom::Coordinate& getProperIntersectionPoint();
00112 
00113         bool hasIntersection();
00114 
00115         bool hasProperIntersection();
00116 
00117         bool hasProperInteriorIntersection();
00118 
00119         void addIntersections(Edge *e0, int segIndex0, Edge *e1, int segIndex1);
00120 
00121 };
00122 
00123 
00124 } // namespace geos.geomgraph.index
00125 } // namespace geos.geomgraph
00126 } // namespace geos
00127 
00128 #endif
00129 
00130 /**********************************************************************
00131  * $Log$
00132  * Revision 1.1  2006/03/14 12:55:55  strk
00133  * Headers split: geomgraphindex.h, nodingSnapround.h
00134  *
00135  **********************************************************************/
00136 

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