LengthIndexOfPoint.h

/**********************************************************************
 *
 * 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