GEOS 3.9.1
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
34namespace geos {
35namespace geom {
36class LineString;
37class Geometry;
38class GeometryFactory;
39}
40}
41
42
43namespace geos {
44namespace operation { // geos.operation
45
47namespace sharedpaths { // geos.operation.sharedpaths
48
66class GEOS_DLL SharedPathsOp {
67public:
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
104
117 void getSharedPaths(PathList& sameDirection, PathList& oppositeDirection);
118
120 static void clearEdges(PathList& from);
121
122private:
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
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition GeometryFactory.h:68
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition Geometry.h:188
Definition LineString.h:68
Find shared paths among two linear Geometry objects.
Definition SharedPathsOp.h:66
static void sharedPathsOp(const geom::Geometry &g1, const geom::Geometry &g2, PathList &sameDirection, PathList &oppositeDirection)
std::vector< geom::LineString * > PathList
LineString vector (list of edges)
Definition SharedPathsOp.h:70
void getSharedPaths(PathList &sameDirection, PathList &oppositeDirection)
static void clearEdges(PathList &from)
Delete all edges in the list.
SharedPathsOp(const geom::Geometry &g1, const geom::Geometry &g2)
Basic namespace for all GEOS functionalities.
Definition IndexedNestedRingTester.h:26