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nodingSnapround.h

00001 /**********************************************************************
00002  * $Id: nodingSnapround.h,v 1.2 2004/07/19 13:19:31 strk Exp $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
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  * $Log: nodingSnapround.h,v $
00016  * Revision 1.2  2004/07/19 13:19:31  strk
00017  * Documentation fixes
00018  *
00019  * Revision 1.1  2004/07/02 13:20:42  strk
00020  * Header files moved under geos/ dir.
00021  *
00022  * Revision 1.1  2004/03/29 06:59:24  ybychkov
00023  * "noding/snapround" package ported (JTS 1.4);
00024  * "operation", "operation/valid", "operation/relate" and "operation/overlay" upgraded to JTS 1.4;
00025  * "geom" partially upgraded.
00026  *
00027  *
00028  **********************************************************************/
00029 
00030 
00031 #ifndef GEOS_NODING_SNAPROUND_H
00032 #define GEOS_NODING_SNAPROUND_H
00033 
00034 #include <geos/platform.h>
00035 #include <geos/noding.h>
00036 #include <geos/geom.h>
00037 #include <vector>
00038 
00039 using namespace std;
00040 
00041 namespace geos {
00042 
00043 class SegmentSnapper {
00044 private:
00045         static double TOLERANCE;
00046 public:
00050         static bool isWithinTolerance(const Coordinate& p,const Coordinate& p0,const Coordinate& p1);
00061         bool addSnappedNode(Coordinate& snapPt,SegmentString *segStr,int segIndex);
00062 };
00063 
00064 class SimpleSegmentStringsSnapper {
00065 private:
00066         int nSnaps;
00071         void computeSnaps(SegmentString *e0, SegmentString *e1, SegmentSnapper *ss);
00072 public:
00073         SimpleSegmentStringsSnapper();
00074         int getNumSnaps();
00075         void computeNodes(vector<SegmentString*>* edges, SegmentSnapper *ss, bool testAllSegments);
00076 };
00077 
00078 /*
00079  * Uses snap rounding to compute a rounded, noded arrangement from a
00080  * set of linestrings.
00081  */
00082 class SnapRounder {
00083 protected:
00084         LineIntersector *li;
00085 public:
00086         void setLineIntersector(LineIntersector *newLi);
00087         vector<SegmentString*>* node(vector<SegmentString*>* inputSegmentStrings);
00088 private:        
00089         vector<SegmentString*>* fullyIntersectSegments(vector<SegmentString*>* segStrings, LineIntersector *aLi);
00094         vector<SegmentString*>* computeSnaps(vector<SegmentString*>* segStrings);
00095 };
00096 
00097 }
00098 #endif
00099 

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