GEOS  3.9.0dev
SharedPathsOp.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2010 Sandro Santilli <strk@kbt.io>
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@kbt.io)
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 
47 namespace sharedpaths { // geos.operation.sharedpaths
48 
66 class GEOS_DLL SharedPathsOp {
67 public:
68 
70  typedef std::vector<geom::LineString*> PathList;
71 
90  static void sharedPathsOp(const geom::Geometry& g1,
91  const geom::Geometry& g2,
92  PathList& sameDirection,
93  PathList& oppositeDirection);
94 
103  SharedPathsOp(const geom::Geometry& g1, const geom::Geometry& g2);
104 
117  void getSharedPaths(PathList& sameDirection, PathList& oppositeDirection);
118 
120  static void clearEdges(PathList& from);
121 
122 private:
123 
130  void findLinearIntersections(PathList& to);
131 
136  bool isForward(const geom::LineString& edge,
137  const geom::Geometry& geom);
138 
141  bool
142  isSameDirection(const geom::LineString& edge)
143  {
144  return (isForward(edge, _g1) == isForward(edge, _g2));
145  }
146 
148  void checkLinealInput(const geom::Geometry& g);
149 
150  const geom::Geometry& _g1;
151  const geom::Geometry& _g2;
152  const geom::GeometryFactory& _gf;
153 
154  // Declare type as noncopyable
155  SharedPathsOp(const SharedPathsOp& other) = delete;
156  SharedPathsOp& operator=(const SharedPathsOp& rhs) = delete;
157 
158 };
159 
160 } // namespace geos.operation.sharedpaths
161 } // namespace geos.operation
162 } // namespace geos
163 
164 #endif
165 
std::vector< geom::LineString * > PathList
LineString vector (list of edges)
Definition: SharedPathsOp.h:70
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:188
Find shared paths among two linear Geometry objects.
Definition: SharedPathsOp.h:66
Definition: LineString.h:68
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:68
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:26