GEOS
3.3.1
|
00001 /********************************************************************** 00002 * $Id: OffsetCurveBuilder.h 3301 2011-04-27 09:42:31Z strk $ 00003 * 00004 * GEOS - Geometry Engine Open Source 00005 * http://geos.refractions.net 00006 * 00007 * Copyright (C) 2009-2011 Sandro Santilli <strk@keybit.net> 00008 * Copyright (C) 2006-2007 Refractions Research Inc. 00009 * 00010 * This is free software; you can redistribute and/or modify it under 00011 * the terms of the GNU Lesser General Public Licence as published 00012 * by the Free Software Foundation. 00013 * See the COPYING file for more information. 00014 * 00015 ********************************************************************** 00016 * 00017 * Last port: operation/buffer/OffsetCurveBuilder.java r378 (JTS-1.12) 00018 * 00019 **********************************************************************/ 00020 00021 #ifndef GEOS_OP_BUFFER_OFFSETCURVEBUILDER_H 00022 #define GEOS_OP_BUFFER_OFFSETCURVEBUILDER_H 00023 00024 #include <geos/export.h> 00025 00026 #include <geos/operation/buffer/BufferParameters.h> // for composition 00027 #include <geos/operation/buffer/OffsetSegmentGenerator.h> 00028 00029 #include <vector> 00030 #include <memory> // for auto_ptr 00031 00032 #ifdef _MSC_VER 00033 #pragma warning(push) 00034 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class 00035 #endif 00036 00037 // Forward declarations 00038 namespace geos { 00039 namespace geom { 00040 class CoordinateSequence; 00041 class PrecisionModel; 00042 } 00043 } 00044 00045 namespace geos { 00046 namespace operation { // geos.operation 00047 namespace buffer { // geos.operation.buffer 00048 00063 class GEOS_DLL OffsetCurveBuilder { 00064 public: 00065 00066 /* 00067 * @param nBufParams buffer parameters, this object will 00068 * keep a reference to the passed parameters 00069 * so caller must make sure the object is 00070 * kept alive for the whole lifetime of 00071 * the buffer builder. 00072 */ 00073 OffsetCurveBuilder(const geom::PrecisionModel *newPrecisionModel, 00074 const BufferParameters& nBufParams) 00075 : 00076 distance(0.0), 00077 precisionModel(newPrecisionModel), 00078 bufParams(nBufParams) 00079 {} 00080 00086 const BufferParameters& getBufferParameters() const 00087 { 00088 return bufParams; 00089 } 00090 00100 void getLineCurve(const geom::CoordinateSequence* inputPts, 00101 double distance, 00102 std::vector<geom::CoordinateSequence*>& lineList); 00103 00120 void getSingleSidedLineCurve(const geom::CoordinateSequence* inputPts, 00121 double distance, std::vector<geom::CoordinateSequence*>& lineList, 00122 bool leftSide, bool rightSide ) ; 00123 00131 void getRingCurve(const geom::CoordinateSequence *inputPts, int side, 00132 double distance, 00133 std::vector<geom::CoordinateSequence*>& lineList); 00134 00135 00136 private: 00137 00138 double distance; 00139 00140 const geom::PrecisionModel* precisionModel; 00141 00142 const BufferParameters& bufParams; 00143 00151 static const double SIMPLIFY_FACTOR; // 100.0; 00152 00160 double simplifyTolerance(double bufDistance); 00161 00162 void computeLineBufferCurve(const geom::CoordinateSequence& inputPts, 00163 OffsetSegmentGenerator& segGen); 00164 00165 void computeSingleSidedBufferCurve(const geom::CoordinateSequence& inputPts, 00166 bool isRightSide, 00167 OffsetSegmentGenerator& segGen); 00168 00169 void computeRingBufferCurve(const geom::CoordinateSequence& inputPts, 00170 int side, OffsetSegmentGenerator& segGen); 00171 00172 std::auto_ptr<OffsetSegmentGenerator> getSegGen(double dist); 00173 00174 void computePointCurve(const geom::Coordinate& pt, 00175 OffsetSegmentGenerator& segGen); 00176 00177 00178 // Declare type as noncopyable 00179 OffsetCurveBuilder(const OffsetCurveBuilder& other); 00180 OffsetCurveBuilder& operator=(const OffsetCurveBuilder& rhs); 00181 }; 00182 00183 } // namespace geos::operation::buffer 00184 } // namespace geos::operation 00185 } // namespace geos 00186 00187 #ifdef _MSC_VER 00188 #pragma warning(pop) 00189 #endif 00190 00191 #endif // ndef GEOS_OP_BUFFER_OFFSETCURVEBUILDER_H 00192