LengthIndexedLine.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * 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
 *
 **********************************************************************/
 
#pragma once
 
#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;
 
    std::unique_ptr<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;
};
 
}
}