60941c2741
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123 lines
2.6 KiB
C++
123 lines
2.6 KiB
C++
/*****************************************************************************
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OscSinCos.hpp
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Copyright (c) 2005 Laurent de Soras
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--- Legal stuff ---
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*Tab=3***********************************************************************/
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#if defined (OscSinCos_CURRENT_CODEHEADER)
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#error Recursive inclusion of OscSinCos code header.
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#endif
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#define OscSinCos_CURRENT_CODEHEADER
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#if ! defined (OscSinCos_CODEHEADER_INCLUDED)
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#define OscSinCos_CODEHEADER_INCLUDED
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/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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#include <cmath>
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namespace std { }
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/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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template <class T>
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OscSinCos <T>::OscSinCos ()
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: _pos_cos (1)
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, _pos_sin (0)
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, _step_cos (1)
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, _step_sin (0)
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{
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// Nothing
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}
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template <class T>
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void OscSinCos <T>::set_step (double angle_rad)
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{
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using namespace std;
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_step_cos = static_cast <DataType> (cos (angle_rad));
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_step_sin = static_cast <DataType> (sin (angle_rad));
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}
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template <class T>
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typename OscSinCos <T>::DataType OscSinCos <T>::get_cos () const
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{
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return (_pos_cos);
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}
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template <class T>
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typename OscSinCos <T>::DataType OscSinCos <T>::get_sin () const
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{
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return (_pos_sin);
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}
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template <class T>
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void OscSinCos <T>::step ()
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{
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const DataType old_cos = _pos_cos;
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const DataType old_sin = _pos_sin;
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_pos_cos = old_cos * _step_cos - old_sin * _step_sin;
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_pos_sin = old_cos * _step_sin + old_sin * _step_cos;
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}
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template <class T>
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void OscSinCos <T>::clear_buffers ()
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{
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_pos_cos = static_cast <DataType> (1);
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_pos_sin = static_cast <DataType> (0);
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}
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/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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#endif // OscSinCos_CODEHEADER_INCLUDED
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#undef OscSinCos_CURRENT_CODEHEADER
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/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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