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RayCrossingCounter.h
1 /**********************************************************************
2 * $Id: RayCrossingCounter.h 2770 2009-12-03 19:27:18Z 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 *
17 * Last port: algorithm/RayCrossingCounter.java rev. 1.2 (JTS-1.9)
18 *
19 **********************************************************************/
20
21 #ifndef GEOS_ALGORITHM_RAYCROSSINGCOUNTER_H
22 #define GEOS_ALGORITHM_RAYCROSSINGCOUNTER_H
23
24 #include <geos/export.h>
25
26 #include <vector>
27
28 // forward declarations
29 namespace geos {
30 namespace geom {
31 class Coordinate;
32 class CoordinateSequence;
33 }
34 }
35
36
37 namespace geos {
38 namespace algorithm {
39
67 class GEOS_DLL RayCrossingCounter
68 {
69 private:
70 const geom::Coordinate& point;
71
72 int crossingCount;
73
74 // true if the test point lies on an input segment
75 bool isPointOnSegment;
76
77 // Declare type as noncopyable
78 RayCrossingCounter(const RayCrossingCounter& other);
79 RayCrossingCounter& operator=(const RayCrossingCounter& rhs);
80
81 public:
90 static int locatePointInRing(const geom::Coordinate& p,
91 const geom::CoordinateSequence& ring);
92
94 static int locatePointInRing(const geom::Coordinate& p,
95 const std::vector<const geom::Coordinate*>& ring);
96
97 RayCrossingCounter(const geom::Coordinate& point)
98 : point( point),
99 crossingCount( 0),
100 isPointOnSegment( false)
101 { }
102
109 void countSegment(const geom::Coordinate& p1,
110 const geom::Coordinate& p2);
111
121 bool isOnSegment()
122 {
123 return isPointOnSegment;
124 }
125
136 int getLocation();
137
148 bool isPointInPolygon();
149
150 };
151
152 } // geos::algorithm
153 } // geos
154
155 #endif // GEOS_ALGORITHM_RAYCROSSINGCOUNTER_H
156 /**********************************************************************
157 * $Log$
158 **********************************************************************/
159