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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