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Polygonizer.h
1 /**********************************************************************
2 *
3 * GEOS - Geometry Engine Open Source
4 * http://geos.osgeo.org
5 *
6 * Copyright (C) 2010 Sandro Santilli <strk@keybit.net>
7 * Copyright (C) 2006 Refractions Research Inc.
8 * Copyright (C) 2001-2002 Vivid Solutions Inc.
9 *
10 * This is free software; you can redistribute and/or modify it under
11 * the terms of the GNU Lesser General Public Licence as published
12 * by the Free Software Foundation.
13 * See the COPYING file for more information.
14 *
15 **********************************************************************
16 *
17 * Last port: operation/polygonize/Polygonizer.java rev. 1.6 (JTS-1.10)
18 *
19 **********************************************************************/
20
21 #ifndef GEOS_OP_POLYGONIZE_POLYGONIZER_H
22 #define GEOS_OP_POLYGONIZE_POLYGONIZER_H
23
24 #include <geos/export.h>
25 #include <geos/geom/GeometryComponentFilter.h> // for LineStringAdder inheritance
26
27 #include <vector>
28
29 #ifdef _MSC_VER
30 #pragma warning(push)
31 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
32 #endif
33
34 // Forward declarations
35 namespace geos {
36 namespace geom {
37 class Geometry;
38 class LineString;
39 class Polygon;
40 }
41 namespace operation {
42 namespace polygonize {
43 class EdgeRing;
44 class PolygonizeGraph;
45 }
46 }
47 }
48
49 namespace geos {
50 namespace operation { // geos::operation
51 namespace polygonize { // geos::operation::polygonize
52
73 class GEOS_DLL Polygonizer {
74 private:
78 class GEOS_DLL LineStringAdder: public geom::GeometryComponentFilter {
79 public:
80 Polygonizer *pol;
81 LineStringAdder(Polygonizer *p);
82 //void filter_rw(geom::Geometry *g);
83 void filter_ro(const geom::Geometry * g);
84 };
85
86 // default factory
87 LineStringAdder lineStringAdder;
88
94 void add(const geom::LineString *line);
95
99 void polygonize();
100
101 void findValidRings(const std::vector<EdgeRing*>& edgeRingList,
102 std::vector<EdgeRing*>& validEdgeRingList,
103 std::vector<geom::LineString*>& invalidRingList);
104
105 void findShellsAndHoles(const std::vector<EdgeRing*>& edgeRingList);
106
107 static void assignHolesToShells(const std::vector<EdgeRing*>& holeList,
108 std::vector<EdgeRing*>& shellList);
109
110 static void assignHoleToShell(EdgeRing *holeER,
111 std::vector<EdgeRing*>& shellList);
112
113 protected:
114
115 PolygonizeGraph *graph;
116
117 // initialize with empty collections, in case nothing is computed
118 std::vector<const geom::LineString*> dangles;
119 std::vector<const geom::LineString*> cutEdges;
120 std::vector<geom::LineString*> invalidRingLines;
121
122 std::vector<EdgeRing*> holeList;
123 std::vector<EdgeRing*> shellList;
124 std::vector<geom::Polygon*> *polyList;
125
126 public:
127
132 Polygonizer();
133
134 ~Polygonizer();
135
144 void add(std::vector<geom::Geometry*> *geomList);
145
154 void add(std::vector<const geom::Geometry*> *geomList);
155
164 void add(geom::Geometry *g);
165
174 void add(const geom::Geometry *g);
175
183 std::vector<geom::Polygon*>* getPolygons();
184
192 const std::vector<const geom::LineString*>& getDangles();
193
194
202 const std::vector<const geom::LineString*>& getCutEdges();
203
212 const std::vector<geom::LineString*>& getInvalidRingLines();
213
214 // This seems to be needed by GCC 2.95.4
215 friend class Polygonizer::LineStringAdder;
216 };
217
218 } // namespace geos::operation::polygonize
219 } // namespace geos::operation
220 } // namespace geos
221
222 #ifdef _MSC_VER
223 #pragma warning(pop)
224 #endif
225
226 #endif // GEOS_OP_POLYGONIZE_POLYGONIZER_H