# SimpleSnapRounder.h

    00001 /**********************************************************************
    00002  * $Id: SimpleSnapRounder.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_SNAPROUND_SIMPLESNAPROUNDER_H
    00017 #define GEOS_NODING_SNAPROUND_SIMPLESNAPROUNDER_H
    00018
    00019 #include <vector>
    00020
    00021 #include <geos/inline.h>
    00022
    00023 #include <geos/noding/Noder.h> // for inheritance
    00024 #include <geos/algorithm/LineIntersector.h> // for composition
    00025 #include <geos/geom/Coordinate.h> // for use in vector
    00026 #include <geos/geom/PrecisionModel.h> // for inlines (should drop)
    00027
    00028 // Forward declarations
    00029 namespace geos {
    00030         namespace geom {
    00031                 //class PrecisionModel;
    00032         }
    00033         namespace algorithm {
    00034                 class LineIntersector;
    00035         }
    00036         namespace noding {
    00037                 class SegmentString;
    00038                 namespace snapround {
    00039                         class HotPixel;
    00040                 }
    00041         }
    00042 }
    00043
    00044 namespace geos {
    00045 namespace noding { // geos::noding
    00046 namespace snapround { // geos::noding::snapround
    00047
    00068 class SimpleSnapRounder: public Noder { // implements NoderIface
    00069
    00070 private:
    00071         const geom::PrecisionModel& pm;
    00072         algorithm::LineIntersector li;
    00073         double scaleFactor;
    00074         std::vector<SegmentString*>* nodedSegStrings;
    00075
    00076         void checkCorrectness(std::vector<SegmentString*>& inputSegmentStrings);
    00077
    00078         void snapRound(std::vector<SegmentString*>* segStrings,
    00079                         algorithm::LineIntersector& li);
    00080
    00092         void findInteriorIntersections(std::vector<SegmentString*>& segStrings,
    00093                         algorithm::LineIntersector& li, std::vector<geom::Coordinate>& ret);
    00094
    00100         void computeSnaps(const std::vector<SegmentString*>& segStrings,
    00101                 std::vector<geom::Coordinate>& snapPts);
    00102
    00103         void computeSnaps(SegmentString* ss, std::vector<geom::Coordinate>& snapPts);
    00104
    00110         void computeVertexSnaps(SegmentString* e0, SegmentString* e1);
    00111
    00112 public:
    00113
    00114         SimpleSnapRounder(const geom::PrecisionModel& newPm);
    00115
    00116         std::vector<SegmentString*>* getNodedSubstrings() const;
    00117
    00118         void computeNodes(std::vector<SegmentString*>* inputSegmentStrings);
    00119
    00120         void add(const SegmentString* segStr);
    00121
    00131         static bool addSnappedNode(const HotPixel& hotPix,
    00132                         SegmentString& segStr,
    00133                         unsigned int segIndex);
    00134
    00141         void computeVertexSnaps(const std::vector<SegmentString*>& edges);
    00142 };
    00143
    00144 } // namespace geos::noding::snapround
    00145 } // namespace geos::noding
    00146 } // namespace geos
    00147
    00148 //#ifdef GEOS_INLINE
    00149 //# include "geos/noding/snapround/SimpleSnapRounder.inl"
    00150 //#endif
    00151
    00152 #endif // GEOS_NODING_SNAPROUND_SIMPLESNAPROUNDER_H
    00153
    00154 /**********************************************************************
    00155  * $Log$
    00156  * Revision 1.3  2006/05/03 15:02:49  strk
    00157  * moved some implementations from header to .cpp file (taken out of inline)
    00158  *
    00159  * Revision 1.2  2006/03/24 09:52:41  strk
    00160  * USE_INLINE => GEOS_INLINE
    00161  *
    00162  * Revision 1.1  2006/03/14 12:55:56  strk
    00163  * Headers split: geomgraphindex.h, nodingSnapround.h
    00164  *
    00165  **********************************************************************/
    00166