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# LengthIndexOfPoint.h

    00001 /**********************************************************************
    00002  * $Id: LengthIndexOfPoint.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/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
    00037 class LengthIndexOfPoint
    00038 {
    00039
    00040 private:
    00041         const geom::Geometry *linearGeom;
    00042
    00043         double indexOfFromStart(const geom::Coordinate& inputPt, const double minIndex) const;
    00044
    00045         double segmentNearestMeasure(const geom::LineSegment *seg,
    00046                                const geom::Coordinate& inputPt,
    00047                                double segmentStartMeasure) const;
    00048 public:
    00049         static double indexOf(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt);
    00050
    00051         static double indexOfAfter(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt, double minIndex);
    00052
    00053         LengthIndexOfPoint(const geom::Geometry *linearGeom);
    00054
    00061         double indexOf(const geom::Coordinate& inputPt) const;
    00062
    00078         double indexOfAfter(const geom::Coordinate& inputPt, double minIndex) const;
    00079
    00080 };
    00081 }
    00082 }
    00083 #endif