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LengthIndexedLine.h

00001 /**********************************************************************
00002  * $Id: LengthIndexedLine.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/LengthIndexedLine.java rev. 1.10
00018  *
00019  **********************************************************************/
00020 
00021 #ifndef GEOS_LINEARREF_LENGTHINDEXEDLINE_H
00022 #define GEOS_LINEARREF_LENGTHINDEXEDLINE_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 
00044 class LengthIndexedLine
00045 {
00046 private:
00047         const geom::Geometry *linearGeom;
00048         LinearLocation locationOf(double index) const;
00049 
00050 public:
00051 
00059         LengthIndexedLine(const geom::Geometry *linearGeom);
00060 
00072         geom::Coordinate extractPoint(double index) const;
00073 
00074 
00091         geom::Coordinate extractPoint(double index, double offsetDistance) const;
00092 
00103         geom::Geometry *extractLine(double startIndex, double endIndex) const;
00104 
00105 
00123         double indexOf(const geom::Coordinate& pt) const;
00124 
00147         double indexOfAfter(const geom::Coordinate& pt, double minIndex) const;
00148 
00158         double* indicesOf(const geom::Geometry *subLine) const;
00159 
00160 
00170         double project(const geom::Coordinate& pt) const;
00171 
00176         double getStartIndex() const;
00177 
00182         double getEndIndex() const;
00183 
00190         bool isValidIndex(double index) const;
00191 
00192 
00199         double clampIndex(double index) const;
00200 };
00201 }
00202 }
00203 #endif

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