/*****************************************************************************

        OscSinCos.hpp

        Copyright (c) 2005 Laurent de Soras

--- Legal stuff ---

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*Tab=3***********************************************************************/

#if defined (OscSinCos_CURRENT_CODEHEADER)

	#error Recursive inclusion of OscSinCos code header.

#endif

#define	OscSinCos_CURRENT_CODEHEADER

#if ! defined (OscSinCos_CODEHEADER_INCLUDED)

#define	OscSinCos_CODEHEADER_INCLUDED

/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

#include	<cmath>

namespace std { }

/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

template <class T>

OscSinCos <T>::OscSinCos ()

:	_pos_cos (1)

,	_pos_sin (0)

,	_step_cos (1)

,	_step_sin (0)

{

	// Nothing

}

template <class T>

void	OscSinCos <T>::set_step (double angle_rad)

{

	using namespace std;

	_step_cos = static_cast <DataType> (cos (angle_rad));

	_step_sin = static_cast <DataType> (sin (angle_rad));

}

template <class T>

typename OscSinCos <T>::DataType	OscSinCos <T>::get_cos () const

{

	return (_pos_cos);

}

template <class T>

typename OscSinCos <T>::DataType	OscSinCos <T>::get_sin () const

{

	return (_pos_sin);

}

template <class T>

void	OscSinCos <T>::step ()

{

	const DataType	old_cos = _pos_cos;

	const DataType	old_sin = _pos_sin;

	_pos_cos = old_cos * _step_cos - old_sin * _step_sin;

	_pos_sin = old_cos * _step_sin + old_sin * _step_cos;

}

template <class T>

void	OscSinCos <T>::clear_buffers ()

{

	_pos_cos = static_cast <DataType> (1);

	_pos_sin = static_cast <DataType> (0);

}

/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

#endif	// OscSinCos_CODEHEADER_INCLUDED

#undef OscSinCos_CURRENT_CODEHEADER

/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/