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OffsetPointGenerator.h
1 /**********************************************************************
2 *
3 * GEOS - Geometry Engine Open Source
4 * http://geos.osgeo.org
5 *
6 * Copyright (C) 2006 Refractions Research Inc.
7 *
8 * This is free software; you can redistribute and/or modify it under
9 * the terms of the GNU Lesser General Public Licence as published
10 * by the Free Software Foundation.
11 * See the COPYING file for more information.
12 *
13 ***********************************************************************
14 *
15 * Last port: operation/overlay/validate/OffsetPointGenerator.java rev. 1.1 (JTS-1.10)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H
20 #define GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H
21
22 #include <geos/export.h>
23 #include <geos/algorithm/PointLocator.h> // for composition
24 #include <geos/geom/Geometry.h> // for auto_ptr visibility of dtor
25 #include <geos/geom/MultiPoint.h> // for auto_ptr visibility of dtor
26 #include <geos/geom/Coordinate.h> // for use in vector
27
28 #include <vector>
29 #include <memory> // for auto_ptr
30
31 #ifdef _MSC_VER
32 #pragma warning(push)
33 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
34 #endif
35
36 // Forward declarations
37 namespace geos {
38 namespace geom {
39 //class Geometry;
40 //class MultiPoint;
41 class LineString;
42 //class Coordinate;
43 }
44 }
45
46 namespace geos {
47 namespace operation { // geos::operation
48 namespace overlay { // geos::operation::overlay
49 namespace validate { // geos::operation::overlay::validate
50
52 //
53 class GEOS_DLL OffsetPointGenerator {
54
55 public:
56
57 OffsetPointGenerator(const geom::Geometry& geom, double offset);
58
60 std::auto_ptr< std::vector<geom::Coordinate> > getPoints();
61
62 private:
63
64 const geom::Geometry& g;
65
66 double offsetDistance;
67
68 std::auto_ptr< std::vector<geom::Coordinate> > offsetPts;
69
70 void extractPoints(const geom::LineString* line);
71
72 void computeOffsets(const geom::Coordinate& p0,
73 const geom::Coordinate& p1);
74
75 // Declare type as noncopyable
76 OffsetPointGenerator(const OffsetPointGenerator& other);
77 OffsetPointGenerator& operator=(const OffsetPointGenerator& rhs);
78 };
79
80 } // namespace geos::operation::overlay::validate
81 } // namespace geos::operation::overlay
82 } // namespace geos::operation
83 } // namespace geos
84
85 #ifdef _MSC_VER
86 #pragma warning(pop)
87 #endif
88
89 #endif // ndef GEOS_OP_OVERLAY_OFFSETPOINTGENERATOR_H