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ScaledNoder.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/ScaledNoder.java rev. 1.3 (JTS-1.7.1)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_NODING_SCALEDNODER_H
20 #define GEOS_NODING_SCALEDNODER_H
21
22 #include <geos/export.h>
23
24 #include <cassert>
25 #include <vector>
26
27 #include <geos/inline.h>
28 #include <geos/noding/Noder.h> // for inheritance
29 //#include <geos/geom/CoordinateFilter.h> // for inheritance
30 #include <geos/util.h>
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 Coordinate;
41 class CoordinateSequence;
42 }
43 namespace noding {
44 class SegmentString;
45 }
46 }
47
48 namespace geos {
49 namespace noding { // geos.noding
50
61 class GEOS_DLL ScaledNoder : public Noder { // , public geom::CoordinateFilter { // implements Noder
62
63 public:
64
65 bool isIntegerPrecision() { return (scaleFactor == 1.0); }
66
67 ScaledNoder(Noder& n, double nScaleFactor,
68 double nOffsetX=0.0, double nOffsetY=0.0)
69 :
70 noder(n),
71 scaleFactor(nScaleFactor),
72 offsetX(nOffsetX),
73 offsetY(nOffsetY),
74 isScaled(nScaleFactor!=1.0)
75 {}
76
77 ~ScaledNoder();
78
79 std::vector<SegmentString*>* getNodedSubstrings() const;
80
81 void computeNodes(std::vector<SegmentString*>* inputSegStr);
82
83 //void filter(Coordinate& c);
84
85 void filter_ro(const geom::Coordinate* c)
86 {
87 ::geos::ignore_unused_variable_warning(c);
88 assert(0);
89 }
90
91 void filter_rw(geom::Coordinate* c) const;
92
93 private:
94
95 Noder& noder;
96
97 double scaleFactor;
98
99 double offsetX;
100
101 double offsetY;
102
103 bool isScaled;
104
105 void rescale(std::vector<SegmentString*>& segStrings) const;
106
107 void scale(std::vector<SegmentString*>& segStrings) const;
108
109 class Scaler;
110
111 class ReScaler;
112
113 friend class ScaledNoder::Scaler;
114
115 friend class ScaledNoder::ReScaler;
116
117 mutable std::vector<geom::CoordinateSequence*> newCoordSeq;
118
119 // Declare type as noncopyable
120 ScaledNoder(const ScaledNoder& other);
121 ScaledNoder& operator=(const ScaledNoder& rhs);
122 };
123
124 } // namespace geos.noding
125 } // namespace geos
126
127 #ifdef _MSC_VER
128 #pragma warning(pop)
129 #endif
130
131 #endif // GEOS_NODING_SCALEDNODER_H