GEOS  3.3.9
LengthIndexedLine.h
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