OrientedCoordinateArray.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2009    Sandro Santilli <strk@kbt.io>
 *
 * 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: noding/OrientedCoordinateArray.java rev. 1.1 (JTS-1.9)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
 
#include <cstddef>
 
// Forward declarations
namespace geos {
namespace geom {
class CoordinateSequence;
}
namespace noding {
//class SegmentString;
}
}
 
namespace geos {
namespace noding { // geos.noding
 
class GEOS_DLL OrientedCoordinateArray {
public:
 
    OrientedCoordinateArray(const geom::CoordinateSequence& p_pts)
        :
        pts(&p_pts),
        orientationVar(orientation(p_pts))
    {
    }
 
    int compareTo(const OrientedCoordinateArray& o1) const;
 
    bool operator==(const OrientedCoordinateArray& other) const;
 
    struct GEOS_DLL HashCode {
        std::size_t operator()(const OrientedCoordinateArray & oca) const;
    };
 
private:
 
    static int compareOriented(const geom::CoordinateSequence& pts1,
                               bool orientation1,
                               const geom::CoordinateSequence& pts2,
                               bool orientation2);
 
 
    static bool orientation(const geom::CoordinateSequence& pts);
 
    const geom::CoordinateSequence* pts;
 
    bool orientationVar;
 
};
 
inline bool
operator< (const OrientedCoordinateArray& oca1,
           const OrientedCoordinateArray& oca2)
{
    return oca1.compareTo(oca2) < 0;
}
 
} // namespace geos.noding
} // namespace geos