GEOS 3.9.1
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 unique_ptr visibility of dtor
25#include <geos/geom/MultiPoint.h> // for unique_ptr visibility of dtor
26#include <geos/geom/Coordinate.h> // for use in vector
27
28#include <vector>
29#include <memory> // for unique_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
37namespace geos {
38namespace geom {
39//class Geometry;
40//class MultiPoint;
41class LineString;
42//class Coordinate;
43}
44}
45
46namespace geos {
47namespace operation { // geos::operation
48namespace overlay { // geos::operation::overlay
49namespace validate { // geos::operation::overlay::validate
50
52//
53class GEOS_DLL OffsetPointGenerator {
54
55public:
56
57 OffsetPointGenerator(const geom::Geometry& geom, double offset);
58
60 std::unique_ptr< std::vector<geom::Coordinate> > getPoints();
61
62private:
63
64 const geom::Geometry& g;
65
66 double offsetDistance;
67
68 std::unique_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) = delete;
77 OffsetPointGenerator& operator=(const OffsetPointGenerator& rhs) = delete;
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
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:60
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:188
Definition: LineString.h:68
Generates points offset from both sides of all segments in a geometry.
Definition: OffsetPointGenerator.h:53
std::unique_ptr< std::vector< geom::Coordinate > > getPoints()
Gets the computed offset points.
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:26