GEOS 3.9.1
HotPixel.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: noding/snapround/HotPixel.java r320 (JTS-1.12)
16 *
17 **********************************************************************/
18
19#pragma once
20
21#include <geos/export.h>
22
23#include <geos/inline.h>
24
25#include <geos/geom/Coordinate.h> // for composition
26#include <geos/geom/Envelope.h> // for unique_ptr
27#include <geos/io/WKTWriter.h>
28
29
30#include <array>
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
38namespace geos {
39namespace geom {
40class Envelope;
41}
42namespace algorithm {
43class LineIntersector;
44}
45namespace noding {
46class NodedSegmentString;
47}
48}
49
50namespace geos {
51namespace noding { // geos::noding
52namespace snapround { // geos::noding::snapround
53
63class GEOS_DLL HotPixel {
64
65private:
66
67 static constexpr double TOLERANCE = 0.5;
68
69 static constexpr int UPPER_RIGHT = 0;
70 static constexpr int UPPER_LEFT = 1;
71 static constexpr int LOWER_LEFT = 2;
72 static constexpr int LOWER_RIGHT = 3;
73
74 geom::Coordinate originalPt;
75 double scaleFactor;
76
77 /* Indicates if this hot pixel must be a node in the output. */
78 bool hpIsNode;
79
80 /* The scaled ordinates of the hot pixel point */
81 double hpx;
82 double hpy;
83
84 double scaleRound(double val) const;
85
86 double scale(double val) const;
87
88 bool intersectsPixelClosure(const geom::Coordinate& p0,
89 const geom::Coordinate& p1) const;
90
91 bool intersectsScaled(double p0x, double p0y, double p1x, double p1y) const;
92
93 // Declare type as noncopyable
94 HotPixel(const HotPixel& other) = delete;
95 HotPixel& operator=(const HotPixel& rhs) = delete;
96
97public:
98
102 double getWidth() const { return 1.0 / scaleFactor; };
103
104 double getScaleFactor() const { return scaleFactor; };
105
112 HotPixel(const geom::Coordinate& pt, double scaleFactor);
113
114 /*
115 * Gets the coordinate this hot pixel is based at.
116 *
117 * @return the coordinate of the pixel
118 */
119 const geom::Coordinate& getCoordinate() const;
120
129 const geom::Coordinate& p1) const;
130
137 bool intersects(const geom::Coordinate& p) const;
138
139 bool isNode() const { return hpIsNode; };
140 void setToNode() { hpIsNode = true; };
141
142 std::ostream& operator<< (std::ostream& os);
143};
144
145} // namespace geos::noding::snapround
146} // namespace geos::noding
147} // namespace geos
148
149#ifdef _MSC_VER
150#pragma warning(pop)
151#endif
152
153#ifdef GEOS_INLINE
154# include "geos/noding/snapround/HotPixel.inl"
155#endif
156
Coordinate is the lightweight class used to store coordinates.
Definition Coordinate.h:60
Implements a "hot pixel" as used in the Snap Rounding algorithm.
Definition HotPixel.h:63
HotPixel(const geom::Coordinate &pt, double scaleFactor)
bool intersects(const geom::Coordinate &p0, const geom::Coordinate &p1) const
bool intersects(const geom::Coordinate &p) const
double getWidth() const
Definition HotPixel.h:102
Basic namespace for all GEOS functionalities.
Definition IndexedNestedRingTester.h:26