PolygonNode.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2021 Paul Ramsey <pramsey@cleverelephant.ca>
 * Copyright (C) 2021 Martin Davis
 *
 * 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.
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
 
 
#include <memory>
 
// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
}
}
namespace geos {      // geos.
namespace operation { // geos.operation
namespace valid {     // geos.operation.valid
 
using geos::geom::Coordinate;
 
class GEOS_DLL PolygonNode {
 
private:
 
    static bool
    isBetween(const Coordinate* origin, const Coordinate* p,
        const Coordinate* e0, const Coordinate* e1);
 
    static bool
    isAngleGreater(const Coordinate* origin,
        const Coordinate* p, const Coordinate* q);
 
    static int
    quadrant(const Coordinate* origin, const Coordinate* p);
 
 
public:
 
    static bool isCrossing(const Coordinate* nodePt,
        const Coordinate* a0, const Coordinate* a1,
        const Coordinate* b0, const Coordinate* b1);
 
    static bool isInteriorSegment(const Coordinate* nodePt,
        const Coordinate* a0, const Coordinate* a1,
        const Coordinate* b);
 
};
 
 
 
} // namespace geos.operation.valid
} // namespace geos.operation
} // namespace geos