GEOS
3.3.9
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00001 /********************************************************************** 00002 * $Id: LengthIndexOfPoint.h 3012 2010-06-19 11:14:21Z strk $ 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/LengthIndexOfPoint.java rev. 1.10 00018 * 00019 **********************************************************************/ 00020 00021 #ifndef GEOS_LINEARREF_LENGTHINDEXOFPOINT_H 00022 #define GEOS_LINEARREF_LENGTHINDEXOFPOINT_H 00023 00024 #include <string> 00025 00026 #include <geos/geom/Coordinate.h> 00027 #include <geos/geom/Geometry.h> 00028 #include <geos/geom/LineSegment.h> 00029 #include <geos/linearref/LinearLocation.h> 00030 00031 00032 namespace geos 00033 { 00034 namespace linearref // geos::linearref 00035 { 00036 00046 class LengthIndexOfPoint 00047 { 00048 00049 private: 00050 const geom::Geometry *linearGeom; 00051 00052 double indexOfFromStart(const geom::Coordinate& inputPt, const double minIndex) const; 00053 00054 double segmentNearestMeasure(const geom::LineSegment *seg, 00055 const geom::Coordinate& inputPt, 00056 double segmentStartMeasure) const; 00057 public: 00058 static double indexOf(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt); 00059 00060 static double indexOfAfter(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt, double minIndex); 00061 00062 LengthIndexOfPoint(const geom::Geometry *linearGeom); 00063 00070 double indexOf(const geom::Coordinate& inputPt) const; 00071 00087 double indexOfAfter(const geom::Coordinate& inputPt, double minIndex) const; 00088 00089 }; 00090 } 00091 } 00092 #endif