LengthIndexOfPoint.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2005-2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: linearref/LengthIndexOfPoint.java rev. 1.10
 *
 **********************************************************************/

#ifndef GEOS_LINEARREF_LENGTHINDEXOFPOINT_H
#define GEOS_LINEARREF_LENGTHINDEXOFPOINT_H

#include <string>

#include <geos/geom/Coordinate.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/LineSegment.h>
#include <geos/linearref/LinearLocation.h>


namespace geos {
namespace linearref { // geos::linearref

class LengthIndexOfPoint {

private:
    const geom::Geometry* linearGeom;

    double indexOfFromStart(const geom::Coordinate& inputPt, const double minIndex) const;

    double segmentNearestMeasure(const geom::LineSegment* seg,
                                 const geom::Coordinate& inputPt,
                                 double segmentStartMeasure) const;
public:
    static double indexOf(const geom::Geometry* linearGeom, const geom::Coordinate& inputPt);

    static double indexOfAfter(const geom::Geometry* linearGeom, const geom::Coordinate& inputPt, double minIndex);

    LengthIndexOfPoint(const geom::Geometry* linearGeom);

    double indexOf(const geom::Coordinate& inputPt) const;

    double indexOfAfter(const geom::Coordinate& inputPt, double minIndex) const;

};
}
}
#endif