GEOS  3.6.2
SegmentIntersector.h
00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2005-2006 Refractions Research Inc.
00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************/
00015 
00016 #ifndef GEOS_GEOMGRAPH_INDEX_SEGMENTINTERSECTOR_H
00017 #define GEOS_GEOMGRAPH_INDEX_SEGMENTINTERSECTOR_H
00018 
00019 #include <geos/export.h>
00020 #include <vector>
00021 
00022 #include <geos/geom/Coordinate.h> // for composition
00023 
00024 #ifdef _MSC_VER
00025 #pragma warning(push)
00026 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
00027 #endif
00028 
00029 // Forward declarations
00030 namespace geos {
00031         namespace algorithm {
00032                 class LineIntersector;
00033         }
00034         namespace geomgraph {
00035                 class Node;
00036                 class Edge;
00037         }
00038 }
00039 
00040 namespace geos {
00041 namespace geomgraph { // geos::geomgraph
00042 namespace index { // geos::geomgraph::index
00043 
00044 
00045 class GEOS_DLL SegmentIntersector{
00046 
00047 private:
00048 
00053         bool hasIntersectionVar;
00054 
00055         bool hasProper;
00056 
00057         bool hasProperInterior;
00058 
00059         bool isDone;
00060         
00061         bool isDoneWhenProperInt;
00062 
00063         // the proper intersection point found
00064         geom::Coordinate properIntersectionPoint;
00065 
00066         algorithm::LineIntersector *li;
00067 
00068         bool includeProper;
00069 
00070         bool recordIsolated;
00071 
00072         //bool isSelfIntersection;
00073 
00074         //bool intersectionFound;
00075 
00076         int numIntersections;
00077 
00079         std::vector<std::vector<Node*>*> bdyNodes;
00080 
00081         bool isTrivialIntersection(Edge *e0,int segIndex0,Edge *e1, int segIndex1);
00082 
00083         bool isBoundaryPoint(algorithm::LineIntersector *li,
00084                         std::vector<std::vector<Node*>*>& tstBdyNodes);
00085 
00086         bool isBoundaryPoint(algorithm::LineIntersector *li,
00087                         std::vector<Node*> *tstBdyNodes);
00088 
00089 public:
00090 
00091         static bool isAdjacentSegments(int i1,int i2);
00092 
00093         // testing only
00094         int numTests;
00095 
00096         //SegmentIntersector();
00097 
00098         virtual ~SegmentIntersector() {}
00099 
00100         SegmentIntersector(algorithm::LineIntersector *newLi,
00101                         bool newIncludeProper, bool newRecordIsolated)
00102                 :
00103                 hasIntersectionVar(false),
00104                 hasProper(false),
00105                 hasProperInterior(false),
00106                 isDone(false),
00107                 isDoneWhenProperInt(false),
00108                 li(newLi),
00109                 includeProper(newIncludeProper),
00110                 recordIsolated(newRecordIsolated),
00111                 numIntersections(0),
00112                 bdyNodes(2),
00113                 numTests(0)
00114         {}
00115 
00119         void setBoundaryNodes(std::vector<Node*> *bdyNodes0,
00120                         std::vector<Node*> *bdyNodes1);
00121 
00122         geom::Coordinate& getProperIntersectionPoint();
00123 
00124         bool hasIntersection();
00125 
00126         bool hasProperIntersection();
00127 
00128         bool hasProperInteriorIntersection();
00129 
00130         void addIntersections(Edge *e0, int segIndex0, Edge *e1, int segIndex1);
00131 
00132         void setIsDoneIfProperInt(bool isDoneWhenProperInt);
00133 
00134         bool getIsDone();
00135         
00136 };
00137 
00138 } // namespace geos.geomgraph.index
00139 } // namespace geos.geomgraph
00140 } // namespace geos
00141 
00142 #ifdef _MSC_VER
00143 #pragma warning(pop)
00144 #endif
00145 
00146 #endif
00147