IntersectionAdder.h

00001 /**********************************************************************
00002  * $Id: IntersectionAdder.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) 2006      Refractions Research 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_NODING_INTERSECTIONADDER_H
00017 #define GEOS_NODING_INTERSECTIONADDER_H
00018 
00019 #include <vector>
00020 #include <iostream>
00021 #include <cmath> // for abs()
00022 
00023 #include <geos/inline.h>
00024 
00025 #include <geos/geom/Coordinate.h>
00026 #include <geos/noding/SegmentIntersector.h> // for inheritance
00027 
00028 // Forward declarations
00029 namespace geos {
00030         namespace geom {
00031                 class Coordinate;
00032         }
00033         namespace noding {
00034                 class SegmentString;
00035         }
00036         namespace algorithm {
00037                 class LineIntersector;
00038         }
00039 }
00040 
00041 namespace geos {
00042 namespace noding { // geos.noding
00043 
00055 class IntersectionAdder: public SegmentIntersector {
00056 
00057 private:
00058 
00063         bool hasIntersectionVar;
00064         bool hasProper;
00065         bool hasProperInterior;
00066         bool hasInterior;
00067 
00068         // the proper intersection point found
00069         const geom::Coordinate* properIntersectionPoint;
00070 
00071         algorithm::LineIntersector& li;
00072         bool isSelfIntersection;
00073         //bool intersectionFound;
00074 
00081         bool isTrivialIntersection(const SegmentString* e0, int segIndex0,
00082                         const SegmentString* e1, int segIndex1);
00083  
00084  
00085 
00086 public:
00087 
00088         int numIntersections;
00089         int numInteriorIntersections;
00090         int numProperIntersections;
00091 
00092         // testing only
00093         int numTests;
00094 
00095         IntersectionAdder(algorithm::LineIntersector& newLi)
00096                 :
00097                 hasIntersectionVar(false),
00098                 hasProper(false),
00099                 hasProperInterior(false),
00100                 hasInterior(false),
00101                 properIntersectionPoint(NULL),
00102                 li(newLi),
00103                 numIntersections(0),
00104                 numInteriorIntersections(0),
00105                 numProperIntersections(0),
00106                 numTests(0)
00107         {}
00108 
00109         algorithm::LineIntersector& getLineIntersector() { return li; }
00110 
00115         const geom::Coordinate* getProperIntersectionPoint()  {
00116                 return properIntersectionPoint;
00117         }
00118 
00119         bool hasIntersection() { return hasIntersectionVar; }
00120 
00129         bool hasProperIntersection() { return hasProper; }
00130 
00136         bool hasProperInteriorIntersection() { return hasProperInterior; }
00137 
00142         bool hasInteriorIntersection() { return hasInterior; }
00143 
00144 
00154         void processIntersections(
00155                 SegmentString* e0,  int segIndex0,
00156                 SegmentString* e1,  int segIndex1);
00157 
00158  
00159         static bool isAdjacentSegments(int i1, int i2) {
00160                 return abs(i1 - i2) == 1;
00161         }
00162 
00163 };
00164  
00165 
00166 } // namespace geos.noding
00167 } // namespace geos
00168 
00169 //#ifdef GEOS_INLINE
00170 //# include "geos/noding/IntersectionAdder.inl"
00171 //#endif
00172 
00173 #endif // GEOS_NODING_INTERSECTIONADDER_H
00174 
00175 /**********************************************************************
00176  * $Log$
00177  * Revision 1.2  2006/03/24 09:52:41  strk
00178  * USE_INLINE => GEOS_INLINE
00179  *
00180  * Revision 1.1  2006/03/09 16:46:49  strk
00181  * geos::geom namespace definition, first pass at headers split
00182  *
00183  **********************************************************************/
00184 

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