GEOS
3.3.1
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00001 /********************************************************************** 00002 * $Id: LengthIndexedLine.h 3255 2011-03-01 17:56:10Z mloskot $ 00003 * 00004 * GEOS - Geometry Engine Open Source 00005 * http://geos.refractions.net 00006 * 00007 * Copyright (C) 2005-2006 Refractions Research Inc. 00008 * Copyright (C) 2001-2002 Vivid Solutions 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: linearref/LengthIndexedLine.java rev. 1.10 00018 * 00019 **********************************************************************/ 00020 00021 #ifndef GEOS_LINEARREF_LENGTHINDEXEDLINE_H 00022 #define GEOS_LINEARREF_LENGTHINDEXEDLINE_H 00023 00024 #include <geos/export.h> 00025 #include <geos/geom/Coordinate.h> 00026 #include <geos/geom/Geometry.h> 00027 #include <geos/linearref/LinearLocation.h> 00028 00029 namespace geos 00030 { 00031 namespace linearref // geos::linearref 00032 { 00033 00045 class GEOS_DLL LengthIndexedLine 00046 { 00047 private: 00048 const geom::Geometry *linearGeom; 00049 LinearLocation locationOf(double index) const; 00050 00051 public: 00052 00060 LengthIndexedLine(const geom::Geometry *linearGeom); 00061 00073 geom::Coordinate extractPoint(double index) const; 00074 00075 00092 geom::Coordinate extractPoint(double index, double offsetDistance) const; 00093 00104 geom::Geometry *extractLine(double startIndex, double endIndex) const; 00105 00106 00124 double indexOf(const geom::Coordinate& pt) const; 00125 00148 double indexOfAfter(const geom::Coordinate& pt, double minIndex) const; 00149 00159 double* indicesOf(const geom::Geometry *subLine) const; 00160 00161 00171 double project(const geom::Coordinate& pt) const; 00172 00177 double getStartIndex() const; 00178 00183 double getEndIndex() const; 00184 00191 bool isValidIndex(double index) const; 00192 00193 00200 double clampIndex(double index) const; 00201 }; 00202 } 00203 } 00204 #endif