TrianglePredicate.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2012 Excensus LLC.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: triangulate/quadedge/TrianglePredicate.java r524
 *
 **********************************************************************/

#ifndef GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
#define GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H

#include <geos/export.h>

namespace geos {
namespace geom { // geos.geom

class Coordinate;

class GEOS_DLL TrianglePredicate {
public:
    static bool isInCircleNonRobust(
        const Coordinate& a, const Coordinate& b, const Coordinate& c,
        const Coordinate& p);

    static bool isInCircleNormalized(
        const Coordinate& a, const Coordinate& b, const Coordinate& c,
        const Coordinate& p);

private:
    static double triArea(const Coordinate& a,
                          const Coordinate& b, const Coordinate& c);

public:
    static bool isInCircleRobust(
        const Coordinate& a, const Coordinate& b, const Coordinate& c,
        const Coordinate& p);
} ;

} // namespace geos.geom
} // namespace geos

#endif //GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H