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RightmostEdgeFinder.h
1 /**********************************************************************
2 * $Id: RightmostEdgeFinder.h 3245 2011-02-23 16:46:10Z strk $
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 * Last port: operation/buffer/RightmostEdgeFinder.java r320 (JTS-1.12)
17 *
18 **********************************************************************/
19
20 #ifndef GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
21 #define GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
22
23 #include <geos/export.h>
24
25 #include <geos/geom/Coordinate.h> // for composition
26
27 #include <vector>
28
29 // Forward declarations
30 namespace geos {
31 namespace geom {
32 }
33 namespace geomgraph {
34 class DirectedEdge;
35 }
36 }
37
38 namespace geos {
39 namespace operation { // geos.operation
40 namespace buffer { // geos.operation.buffer
41
48 class GEOS_DLL RightmostEdgeFinder {
49
50 private:
51
52 int minIndex;
53
54 geom::Coordinate minCoord;
55
56 geomgraph::DirectedEdge *minDe;
57
58 geomgraph::DirectedEdge *orientedDe;
59
60 void findRightmostEdgeAtNode();
61
62 void findRightmostEdgeAtVertex();
63
64 void checkForRightmostCoordinate(geomgraph::DirectedEdge *de);
65
66 int getRightmostSide(geomgraph::DirectedEdge *de, int index);
67
68 int getRightmostSideOfSegment(geomgraph::DirectedEdge *de, int i);
69
70 public:
71
79 RightmostEdgeFinder();
80
81 geomgraph::DirectedEdge* getEdge();
82
83 geom::Coordinate& getCoordinate();
84
86 void findEdge(std::vector<geomgraph::DirectedEdge*>* dirEdgeList);
87 };
88
89 /*public*/
90 inline geomgraph::DirectedEdge*
91 RightmostEdgeFinder::getEdge()
92 {
93 return orientedDe;
94 }
95
96 /*public*/
97 inline geom::Coordinate&
98 RightmostEdgeFinder::getCoordinate()
99 {
100 return minCoord;
101 }
102
103
104
105
106 } // namespace geos::operation::buffer
107 } // namespace geos::operation
108 } // namespace geos
109
110 #endif // ndef GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
111
112 /**********************************************************************
113 * $Log$
114 * Revision 1.3 2006/05/04 12:19:59 strk
115 * Added note about findEdge() only scanning for forward DirectedEdges
116 *
117 * Revision 1.2 2006/04/05 09:20:25 strk
118 * Added port informations and many assertion checking.
119 * Fixed bug in getRightmostSide() method ( a "testing-only" corner case )
120 *
121 * Revision 1.1 2006/03/14 00:19:40 strk
122 * opBuffer.h split, streamlined headers in some (not all) files in operation/buffer/
123 *
124 **********************************************************************/
125