GEOS  3.6.1
SharedPathsOp.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  *
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: original work
16  *
17  * Developed by Sandro Santilli (strk@keybit.net)
18  * for Faunalia (http://www.faunalia.it)
19  * with funding from Regione Toscana - Settore SISTEMA INFORMATIVO
20  * TERRITORIALE ED AMBIENTALE - for the project: "Sviluppo strumenti
21  * software per il trattamento di dati geografici basati su QuantumGIS
22  * e Postgis (CIG 0494241492)"
23  *
24  **********************************************************************/
25 
26 #ifndef GEOS_OPERATION_SHAREDPATHSOP_H
27 #define GEOS_OPERATION_SHAREDPATHSOP_H
28 
29 #include <geos/export.h> // for GEOS_DLL
30 
31 #include <vector>
32 
33 // Forward declarations
34 namespace geos {
35  namespace geom {
36  class LineString;
37  class Geometry;
38  class GeometryFactory;
39  }
40 }
41 
42 
43 namespace geos {
44 namespace operation { // geos.operation
45 namespace sharedpaths { // geos.operation.sharedpaths
46 
64 class GEOS_DLL SharedPathsOp
65 {
66 public:
67 
69  typedef std::vector<geom::LineString*> PathList;
70 
72  //
89  static void sharedPathsOp(const geom::Geometry& g1,
90  const geom::Geometry& g2,
91  PathList& sameDirection,
92  PathList& oppositeDirection);
93 
95  //
102  SharedPathsOp(const geom::Geometry& g1, const geom::Geometry& g2);
103 
105  //
116  void getSharedPaths(PathList& sameDirection, PathList& oppositeDirection);
117 
119  static void clearEdges(PathList& from);
120 
121 private:
122 
124  //
129  void findLinearIntersections(PathList& to);
130 
132  //
135  bool isForward(const geom::LineString& edge,
136  const geom::Geometry& geom);
137 
140  bool isSameDirection(const geom::LineString& edge) {
141  return (isForward(edge, _g1) == isForward(edge, _g2));
142  }
143 
145  void checkLinealInput(const geom::Geometry& g);
146 
147  const geom::Geometry& _g1;
148  const geom::Geometry& _g2;
149  const geom::GeometryFactory& _gf;
150 
151  // Declare type as noncopyable
152  SharedPathsOp(const SharedPathsOp& other);
153  SharedPathsOp& operator=(const SharedPathsOp& rhs);
154 
155 };
156 
157 } // namespace geos.operation.sharedpaths
158 } // namespace geos.operation
159 } // namespace geos
160 
161 #endif
162 
std::vector< geom::LineString * > PathList
LineString vector (list of edges)
Definition: SharedPathsOp.h:69
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:167
Find shared paths among two linear Geometry objects.
Definition: SharedPathsOp.h:64
Definition: LineString.h:70
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:67
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25