GEOS 3.3.1
|
00001 /********************************************************************** 00002 * $Id: LengthLocationMap.h 2809 2009-12-06 01:05:24Z 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/LengthLocationMap.java rev. 1.10 00018 * 00019 **********************************************************************/ 00020 00021 #ifndef GEOS_LINEARREF_LENGTHLOCATIONMAP_H 00022 #define GEOS_LINEARREF_LENGTHLOCATIONMAP_H 00023 00024 #include <geos/geom/Coordinate.h> 00025 #include <geos/geom/Geometry.h> 00026 #include <geos/linearref/LinearLocation.h> 00027 00028 namespace geos 00029 { 00030 namespace linearref // geos::linearref 00031 { 00032 00039 class LengthLocationMap 00040 { 00041 00042 00043 private: 00044 const geom::Geometry *linearGeom; 00045 00046 LinearLocation getLocationForward(double length) const; 00047 00048 public: 00049 00050 // TODO: cache computed cumulative length for each vertex 00051 // TODO: support user-defined measures 00052 // TODO: support measure index for fast mapping to a location 00053 00062 static LinearLocation getLocation(const geom::Geometry *linearGeom, double length); 00063 00072 static double getLength(const geom::Geometry *linearGeom, const LinearLocation& loc); 00073 00074 LengthLocationMap(const geom::Geometry *linearGeom); 00075 00084 LinearLocation getLocation(double length) const; 00085 00086 double getLength(const LinearLocation& loc) const; 00087 00088 }; 00089 } 00090 } 00091 #endif