//----------------------------------------------------------------------------

// Anti-Grain Geometry - Version 2.4

// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)

//

// Permission to copy, use, modify, sell and distribute this software 

// is granted provided this copyright notice appears in all copies. 

// This software is provided "as is" without express or implied

// warranty, and with no claim as to its suitability for any purpose.

//

//----------------------------------------------------------------------------

// Contact: mcseem@antigrain.com

//          mcseemagg@yahoo.com

//          http://www.antigrain.com

//----------------------------------------------------------------------------

//

// Arc vertex generator

//

//----------------------------------------------------------------------------

#ifndef AGG_ARC_INCLUDED

#define AGG_ARC_INCLUDED

#include <math.h>

#include "agg_basics.h"

namespace mapserver

{

    //=====================================================================arc

    //

    // See Implementation agg_arc.cpp 

    //

    class arc

    {

    public:

        arc() : m_scale(1.0), m_initialized(false) {}

        arc(double x,  double y, 

            double rx, double ry, 

            double a1, double a2, 

            bool ccw=true);

        void init(double x,  double y, 

                  double rx, double ry, 

                  double a1, double a2, 

                  bool ccw=true);

        void approximation_scale(double s);

        double approximation_scale() const { return m_scale;  }

        void rewind(unsigned);

        unsigned vertex(double* x, double* y);

    private:

        void normalize(double a1, double a2, bool ccw);

        double   m_x;

        double   m_y;

        double   m_rx;

        double   m_ry;

        double   m_angle = 0;

        double   m_start;

        double   m_end;

        double   m_scale;

        double   m_da;

        bool     m_ccw;

        bool     m_initialized;

        unsigned m_path_cmd = 0;

    };

}

#endif