GEOS  3.3.3
GeometrySnapper.h
1 /**********************************************************************
2  * $Id: GeometrySnapper.h 3538 2011-12-09 10:44:54Z strk $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2009-2010 Sandro Santilli <strk@keybit.net>
8  * Copyright (C) 2006 Refractions Research Inc.
9  *
10  * This is free software; you can redistribute and/or modify it under
11  * the terms of the GNU Lesser General Public Licence as published
12  * by the Free Software Foundation.
13  * See the COPYING file for more information.
14  *
15  ***********************************************************************
16  *
17  * Last port: operation/overlay/snap/GeometrySnapper.java r320 (JTS-1.12)
18  *
19  **********************************************************************/
20 
21 #ifndef GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
22 #define GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
23 
24 #include <geos/geom/Coordinate.h>
25 
26 #include <memory>
27 #include <vector>
28 
29 // Forward declarations
30 namespace geos {
31  namespace geom {
32  //class PrecisionModel;
33  class Geometry;
34  class CoordinateSequence;
35  struct GeomPtrPair;
36  }
37 }
38 
39 namespace geos {
40 namespace operation { // geos::operation
41 namespace overlay { // geos::operation::overlay
42 namespace snap { // geos::operation::overlay::snap
43 
59 class GEOS_DLL GeometrySnapper {
60 
61 public:
62 
63  typedef std::auto_ptr<geom::Geometry> GeomPtr;
64 
74  static void snap(const geom::Geometry& g0,
75  const geom::Geometry& g1,
76  double snapTolerance, geom::GeomPtrPair& ret);
77 
78  static GeomPtr snapToSelf(const geom::Geometry& g0,
79  double snapTolerance, bool cleanResult);
80 
87  :
88  srcGeom(g)
89  {
90  }
91 
101  std::auto_ptr<geom::Geometry> snapTo(const geom::Geometry& g,
102  double snapTolerance);
103 
113  std::auto_ptr<geom::Geometry> snapToSelf(double snapTolerance,
114  bool cleanResult);
115 
123  static double computeOverlaySnapTolerance(const geom::Geometry& g);
124 
125  static double computeSizeBasedSnapTolerance(const geom::Geometry& g);
126 
130  static double computeOverlaySnapTolerance(const geom::Geometry& g1,
131  const geom::Geometry& g2);
132 
133 
134 private:
135 
136  // eventually this will be determined from the geometry topology
137  //static const double snapTol; // = 0.000001;
138 
139  static const double snapPrecisionFactor; // = 10e-10
140 
141  const geom::Geometry& srcGeom;
142 
144  std::auto_ptr<geom::Coordinate::ConstVect> extractTargetCoordinates(
145  const geom::Geometry& g);
146 
147  // Declare type as noncopyable
148  GeometrySnapper(const GeometrySnapper& other);
149  GeometrySnapper& operator=(const GeometrySnapper& rhs);
150 };
151 
152 
153 } // namespace geos::operation::overlay::snap
154 } // namespace geos::operation::overlay
155 } // namespace geos::operation
156 } // namespace geos
157 
158 #endif // GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
159