GEOS
3.6.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2010 Sandro Santilli <strk@keybit.net> 00007 * 00008 * This is free software; you can redistribute and/or modify it under 00009 * the terms of the GNU Lesser General Public Licence as published 00010 * by the Free Software Foundation. 00011 * See the COPYING file for more information. 00012 * 00013 ********************************************************************** 00014 * 00015 * Last port: original work 00016 * 00017 * Developed by Sandro Santilli (strk@keybit.net) 00018 * for Faunalia (http://www.faunalia.it) 00019 * with funding from Regione Toscana - Settore SISTEMA INFORMATIVO 00020 * TERRITORIALE ED AMBIENTALE - for the project: "Sviluppo strumenti 00021 * software per il trattamento di dati geografici basati su QuantumGIS 00022 * e Postgis (CIG 0494241492)" 00023 * 00024 **********************************************************************/ 00025 00026 #ifndef GEOS_OPERATION_SHAREDPATHSOP_H 00027 #define GEOS_OPERATION_SHAREDPATHSOP_H 00028 00029 #include <geos/export.h> // for GEOS_DLL 00030 00031 #include <vector> 00032 00033 // Forward declarations 00034 namespace geos { 00035 namespace geom { 00036 class LineString; 00037 class Geometry; 00038 class GeometryFactory; 00039 } 00040 } 00041 00042 00043 namespace geos { 00044 namespace operation { // geos.operation 00045 namespace sharedpaths { // geos.operation.sharedpaths 00046 00064 class GEOS_DLL SharedPathsOp 00065 { 00066 public: 00067 00069 typedef std::vector<geom::LineString*> PathList; 00070 00072 // 00089 static void sharedPathsOp(const geom::Geometry& g1, 00090 const geom::Geometry& g2, 00091 PathList& sameDirection, 00092 PathList& oppositeDirection); 00093 00095 // 00102 SharedPathsOp(const geom::Geometry& g1, const geom::Geometry& g2); 00103 00105 // 00116 void getSharedPaths(PathList& sameDirection, PathList& oppositeDirection); 00117 00119 static void clearEdges(PathList& from); 00120 00121 private: 00122 00124 // 00129 void findLinearIntersections(PathList& to); 00130 00132 // 00135 bool isForward(const geom::LineString& edge, 00136 const geom::Geometry& geom); 00137 00140 bool isSameDirection(const geom::LineString& edge) { 00141 return (isForward(edge, _g1) == isForward(edge, _g2)); 00142 } 00143 00145 void checkLinealInput(const geom::Geometry& g); 00146 00147 const geom::Geometry& _g1; 00148 const geom::Geometry& _g2; 00149 const geom::GeometryFactory& _gf; 00150 00151 // Declare type as noncopyable 00152 SharedPathsOp(const SharedPathsOp& other); 00153 SharedPathsOp& operator=(const SharedPathsOp& rhs); 00154 00155 }; 00156 00157 } // namespace geos.operation.sharedpaths 00158 } // namespace geos.operation 00159 } // namespace geos 00160 00161 #endif 00162