TrianglePredicate.h

/**********************************************************************
 *
 * 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
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/Location.h>
 
namespace geos {
namespace geom {
class CoordinateXY;
}
}
 
namespace geos {
namespace triangulate {
namespace quadedge {
 
class GEOS_DLL TrianglePredicate {
public:
    using CoordinateXY = geos::geom::CoordinateXY;
 
    static geom::Location isInCircleNonRobust(
        const CoordinateXY& a, const CoordinateXY& b, const CoordinateXY& c,
        const CoordinateXY& p);
 
    static geom::Location isInCircleNormalized(
        const CoordinateXY& a, const CoordinateXY& b, const CoordinateXY& c,
        const CoordinateXY& p);
 
private:
    static double triArea(const CoordinateXY& a,
                          const CoordinateXY& b, const CoordinateXY& c);
 
public:
    static geom::Location isInCircleRobust(
        const CoordinateXY& a, const CoordinateXY& b, const CoordinateXY& c,
        const CoordinateXY& p);
} ;
 
 
} // namespace geos.triangulate.quadedge
} // namespace geos.triangulate
} // namespace geos