GEOS
3.4.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net> 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 r463 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 LinearLocation locationOf(double index, bool resolveLower) const; 00051 double positiveIndex(double index) const; 00052 00053 public: 00054 00062 LengthIndexedLine(const geom::Geometry *linearGeom); 00063 00075 geom::Coordinate extractPoint(double index) const; 00076 00077 00096 geom::Coordinate extractPoint(double index, double offsetDistance) const; 00097 00108 geom::Geometry *extractLine(double startIndex, double endIndex) const; 00109 00110 00128 double indexOf(const geom::Coordinate& pt) const; 00129 00152 double indexOfAfter(const geom::Coordinate& pt, double minIndex) const; 00153 00163 double* indicesOf(const geom::Geometry *subLine) const; 00164 00165 00175 double project(const geom::Coordinate& pt) const; 00176 00181 double getStartIndex() const; 00182 00187 double getEndIndex() const; 00188 00195 bool isValidIndex(double index) const; 00196 00197 00204 double clampIndex(double index) const; 00205 }; 00206 } 00207 } 00208 #endif