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LineMerger.h
1 /**********************************************************************
2 * $Id: LineMerger.h 3309 2011-04-27 15:47:14Z 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/linemerge/LineMerger.java r378 (JTS-1.12)
17 *
18 **********************************************************************/
19
20 #ifndef GEOS_OP_LINEMERGE_LINEMERGER_H
21 #define GEOS_OP_LINEMERGE_LINEMERGER_H
22
23 #include <geos/export.h>
24 #include <geos/operation/linemerge/LineMergeGraph.h> // for composition
25
26 #include <vector>
27
28 #ifdef _MSC_VER
29 #pragma warning(push)
30 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
31 #endif
32
33 // Forward declarations
34 namespace geos {
35 namespace geom {
36 class LineString;
37 class GeometryFactory;
38 class Geometry;
39 }
40 namespace planargraph {
41 class Node;
42 }
43 namespace operation {
44 namespace linemerge {
45 class EdgeString;
46 class LineMergeDirectedEdge;
47 }
48 }
49 }
50
51
52 namespace geos {
53 namespace operation { // geos::operation
54 namespace linemerge { // geos::operation::linemerge
55
76 class GEOS_DLL LineMerger {
77
78 private:
79
80 LineMergeGraph graph;
81
82 std::vector<geom::LineString*> *mergedLineStrings;
83
84 std::vector<EdgeString*> edgeStrings;
85
86 const geom::GeometryFactory *factory;
87
88 void merge();
89
90 void buildEdgeStringsForObviousStartNodes();
91
92 void buildEdgeStringsForIsolatedLoops();
93
94 void buildEdgeStringsForUnprocessedNodes();
95
96 void buildEdgeStringsForNonDegree2Nodes();
97
98 void buildEdgeStringsStartingAt(planargraph::Node *node);
99
100 EdgeString* buildEdgeStringStartingWith(LineMergeDirectedEdge *start);
101
102 public:
103 LineMerger();
104 ~LineMerger();
105
114 void add(std::vector<geom::Geometry*> *geometries);
115
124 void add(const geom::Geometry *geometry);
125
132 std::vector<geom::LineString*>* getMergedLineStrings();
133
134 void add(const geom::LineString *lineString);
135
136 };
137
138 } // namespace geos::operation::linemerge
139 } // namespace geos::operation
140 } // namespace geos
141
142 #ifdef _MSC_VER
143 #pragma warning(pop)
144 #endif
145
146 #endif // GEOS_OP_LINEMERGE_LINEMERGER_H
147
148 /**********************************************************************
149 * $Log$
150 * Revision 1.1 2006/03/22 10:13:53 strk
151 * opLinemerge.h split
152 *
153 **********************************************************************/