CircularArcs.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2024 ISciences, LLC
 *
 * 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 <array>
 
#include <geos/export.h>
#include <geos/geom/Coordinate.h>
#include <geos/geom/Envelope.h>
 
namespace geos {
namespace algorithm {
 
class GEOS_DLL CircularArcs {
public:
 
    static geom::CoordinateXY getCenter(const geom::CoordinateXY& p0, const geom::CoordinateXY& p1,
                                        const geom::CoordinateXY& p2);
 
    static double getAngle(const geom::CoordinateXY& pt, const geom::CoordinateXY& center);
 
    static double getMidpointAngle(double theta0, double theta2, bool isCCW);
 
    static geom::CoordinateXY getMidpoint(const geom::CoordinateXY& p0, const geom::CoordinateXY& p2, const geom::CoordinateXY& center, double radius, bool isCCW);
 
    static void expandEnvelope(geom::Envelope& e, const geom::CoordinateXY& p0, const geom::CoordinateXY& p1,
                               const geom::CoordinateXY& p2);
 
    static geom::CoordinateXY createPoint(const geom::CoordinateXY& center, double radius, double theta);
 
};
 
}
}