GEOS: LineMerger.h Source File

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LineMerger.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: operation/linemerge/LineMerger.java r378 (JTS-1.12)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_OP_LINEMERGE_LINEMERGER_H
20 #define GEOS_OP_LINEMERGE_LINEMERGER_H
21
22 #include <geos/export.h>
23 #include <geos/operation/linemerge/LineMergeGraph.h> // for composition
24
25 #include <vector>
26
27 #ifdef _MSC_VER
28 #pragma warning(push)
29 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
30 #endif
31
32 // Forward declarations
33 namespace geos {
34 namespace geom {
35 class LineString;
36 class GeometryFactory;
37 class Geometry;
38 }
39 namespace planargraph {
40 class Node;
41 }
42 namespace operation {
43 namespace linemerge {
44 class EdgeString;
45 class LineMergeDirectedEdge;
46 }
47 }
48 }
49
50
51 namespace geos {
52 namespace operation { // geos::operation
53 namespace linemerge { // geos::operation::linemerge
54
75 class GEOS_DLL LineMerger {
76
77 private:
78
79 LineMergeGraph graph;
80
81 std::vector<geom::LineString*> *mergedLineStrings;
82
83 std::vector<EdgeString*> edgeStrings;
84
85 const geom::GeometryFactory *factory;
86
87 void merge();
88
89 void buildEdgeStringsForObviousStartNodes();
90
91 void buildEdgeStringsForIsolatedLoops();
92
93 void buildEdgeStringsForUnprocessedNodes();
94
95 void buildEdgeStringsForNonDegree2Nodes();
96
97 void buildEdgeStringsStartingAt(planargraph::Node *node);
98
99 EdgeString* buildEdgeStringStartingWith(LineMergeDirectedEdge *start);
100
101 public:
102 LineMerger();
103 ~LineMerger();
104
113 void add(std::vector<geom::Geometry*> *geometries);
114
123 void add(const geom::Geometry *geometry);
124
131 std::vector<geom::LineString*>* getMergedLineStrings();
132
133 void add(const geom::LineString *lineString);
134
135 };
136
137 } // namespace geos::operation::linemerge
138 } // namespace geos::operation
139 } // namespace geos
140
141 #ifdef _MSC_VER
142 #pragma warning(pop)
143 #endif
144
145 #endif // GEOS_OP_LINEMERGE_LINEMERGER_H
geos::operation::linemerge::LineMerger
Sews together a set of fully noded LineStrings.
Definition: LineMerger.h:75
geos::geom::Geometry
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:167
geos::geom::LineString
Definition: LineString.h:70
geos::operation::linemerge::LineMergeGraph
A planar graph of edges that is analyzed to sew the edges together.
Definition: LineMergeGraph.h:59
geos::operation::linemerge::EdgeString
A sequence of LineMergeDirectedEdge forming one of the lines that will be output by the line-merging ...
Definition: EdgeString.h:55
geos::geom::GeometryFactory
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:67
geos
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
geos::planargraph::Node
A node in a PlanarGraph is a location where 0 or more Edge meet.
Definition: planargraph/Node.h:45
geos::operation::linemerge::LineMergeDirectedEdge
A planargraph::DirectedEdge of a LineMergeGraph.
Definition: LineMergeDirectedEdge.h:47