LengthIndexedLine.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
 * 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/LengthIndexedLine.java r463
 *
 **********************************************************************/
 
#ifndef GEOS_LINEARREF_LENGTHINDEXEDLINE_H
#define GEOS_LINEARREF_LENGTHINDEXEDLINE_H
 
#include <geos/export.h>
#include <geos/geom/Coordinate.h>
#include <geos/geom/Geometry.h>
#include <geos/linearref/LinearLocation.h>
 
namespace geos
{
namespace linearref   // geos::linearref
{

 
class GEOS_DLL LengthIndexedLine
{
private:
        const geom::Geometry *linearGeom;
        LinearLocation locationOf(double index) const;
        LinearLocation locationOf(double index, bool resolveLower) const;
        double positiveIndex(double index) const;
 
public:

 
        LengthIndexedLine(const geom::Geometry *linearGeom);

        geom::Coordinate extractPoint(double index) const;
 

        geom::Coordinate extractPoint(double index, double offsetDistance) const;

        geom::Geometry *extractLine(double startIndex, double endIndex) const;
 

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

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

        double* indicesOf(const geom::Geometry *subLine) const;
 

        double project(const geom::Coordinate& pt) const;

        double getStartIndex() const;

        double getEndIndex() const;

        bool isValidIndex(double index) const;
 

        double clampIndex(double index) const;
};
}
}
#endif