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