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# GeometrySnapper.h

    00001 /**********************************************************************
    00002  * $Id: GeometrySnapper.h 3538 2011-12-09 10:44:54Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2009-2010  Sandro Santilli <strk@keybit.net>
    00008  * Copyright (C) 2006 Refractions Research 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  * Last port: operation/overlay/snap/GeometrySnapper.java r320 (JTS-1.12)
    00018  *
    00019  **********************************************************************/
    00020
    00021 #ifndef GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
    00022 #define GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
    00023
    00024 #include <geos/geom/Coordinate.h>
    00025
    00026 #include <memory>
    00027 #include <vector>
    00028
    00029 // Forward declarations
    00030 namespace geos {
    00031         namespace geom {
    00032                 //class PrecisionModel;
    00033                 class Geometry;
    00034                 class CoordinateSequence;
    00035                 struct GeomPtrPair;
    00036         }
    00037 }
    00038
    00039 namespace geos {
    00040 namespace operation { // geos::operation
    00041 namespace overlay { // geos::operation::overlay
    00042 namespace snap { // geos::operation::overlay::snap
    00043
    00059 class GEOS_DLL GeometrySnapper {
    00060
    00061 public:
    00062
    00063         typedef std::auto_ptr<geom::Geometry> GeomPtr;
    00064
    00074         static void snap(const geom::Geometry& g0,
    00075                                 const geom::Geometry& g1,
    00076                                 double snapTolerance, geom::GeomPtrPair& ret);
    00077
    00078         static GeomPtr snapToSelf(const geom::Geometry& g0,
    00079                                 double snapTolerance, bool cleanResult);
    00080
    00086         GeometrySnapper(const geom::Geometry& g)
    00087                 :
    00088                 srcGeom(g)
    00089         {
    00090         }
    00091
    00101         std::auto_ptr<geom::Geometry> snapTo(const geom::Geometry& g,
    00102                                              double snapTolerance);
    00103
    00113         std::auto_ptr<geom::Geometry> snapToSelf(double snapTolerance,
    00114                                                  bool cleanResult);
    00115
    00123         static double computeOverlaySnapTolerance(const geom::Geometry& g);
    00124
    00125         static double computeSizeBasedSnapTolerance(const geom::Geometry& g);
    00126
    00130         static double computeOverlaySnapTolerance(const geom::Geometry& g1,
    00131                         const geom::Geometry& g2);
    00132
    00133
    00134 private:
    00135
    00136         // eventually this will be determined from the geometry topology
    00137         //static const double snapTol; //  = 0.000001;
    00138
    00139         static const double snapPrecisionFactor; //  = 10e-10
    00140
    00141         const geom::Geometry& srcGeom;
    00142
    00144         std::auto_ptr<geom::Coordinate::ConstVect> extractTargetCoordinates(
    00145                         const geom::Geometry& g);
    00146
    00147     // Declare type as noncopyable
    00148     GeometrySnapper(const GeometrySnapper& other);
    00149     GeometrySnapper& operator=(const GeometrySnapper& rhs);
    00150 };
    00151
    00152
    00153 } // namespace geos::operation::overlay::snap
    00154 } // namespace geos::operation::overlay
    00155 } // namespace geos::operation
    00156 } // namespace geos
    00157
    00158 #endif // GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
    00159