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/*
Copyright (C) 2000 Paul Barton-Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#ifndef __pbd_scale_h__
#define __pbd_scale_h__
#include <cmath>
inline float
scale (float value, float lower, float upper)
{
return fabs (lower + value) / (upper-lower);
}
inline float
scale_with_range (float value, float lower, float range)
{
return fabs (lower + value) / range;
}
inline float
scale_to (float value, float lower, float upper, float to)
{
return (fabs (lower + value) / (upper-lower)) * to;
}
inline float
scale_to_with_range (float value, float lower, float range, float to)
{
return (fabs (lower + value) / range) * to;
}
#endif /* __pbd_scale_h__ */
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