GEOS  3.3.3
OffsetPointGenerator.h
1 /**********************************************************************
2  * $Id: OffsetPointGenerator.h 3255 2011-03-01 17:56:10Z mloskot $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2006 Refractions Research Inc.
8  *
9  * This is free software; you can redistribute and/or modify it under
10  * the terms of the GNU Lesser General Public Licence as published
11  * by the Free Software Foundation.
12  * See the COPYING file for more information.
13  *
14  ***********************************************************************
15  *
16  * Last port: operation/overlay/validate/OffsetPointGenerator.java rev. 1.1 (JTS-1.10)
17  *
18  **********************************************************************/
19 
20 #ifndef GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H
21 #define GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H
22 
23 #include <geos/export.h>
24 #include <geos/algorithm/PointLocator.h> // for composition
25 #include <geos/geom/Geometry.h> // for auto_ptr visibility of dtor
26 #include <geos/geom/MultiPoint.h> // for auto_ptr visibility of dtor
27 #include <geos/geom/Coordinate.h> // for use in vector
28 
29 #include <vector>
30 #include <memory> // for auto_ptr
31 
32 #ifdef _MSC_VER
33 #pragma warning(push)
34 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
35 #endif
36 
37 // Forward declarations
38 namespace geos {
39  namespace geom {
40  //class Geometry;
41  //class MultiPoint;
42  class LineString;
43  //class Coordinate;
44  }
45 }
46 
47 namespace geos {
48 namespace operation { // geos::operation
49 namespace overlay { // geos::operation::overlay
50 namespace validate { // geos::operation::overlay::validate
51 
53 //
54 class GEOS_DLL OffsetPointGenerator {
55 
56 public:
57 
58  OffsetPointGenerator(const geom::Geometry& geom, double offset);
59 
61  std::auto_ptr< std::vector<geom::Coordinate> > getPoints();
62 
63 private:
64 
65  const geom::Geometry& g;
66 
67  double offsetDistance;
68 
69  std::auto_ptr< std::vector<geom::Coordinate> > offsetPts;
70 
71  void extractPoints(const geom::LineString* line);
72 
73  void computeOffsets(const geom::Coordinate& p0,
74  const geom::Coordinate& p1);
75 
76  // Declare type as noncopyable
78  OffsetPointGenerator& operator=(const OffsetPointGenerator& rhs);
79 };
80 
81 } // namespace geos::operation::overlay::validate
82 } // namespace geos::operation::overlay
83 } // namespace geos::operation
84 } // namespace geos
85 
86 #ifdef _MSC_VER
87 #pragma warning(pop)
88 #endif
89 
90 #endif // ndef GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H
91 
92 /**********************************************************************
93  * $Log$
94  **********************************************************************/
95