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40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
/*
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* noise.cpp - defination of Noise class.
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*
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* Copyright (c) 2014 David French <dave/dot/french3/at/googlemail/dot/com>
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*
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* This file is part of LMMS - http://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include "noise.h"
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#include "lmms_math.h"
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Noise::Noise()
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{
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inv_randmax = 1.0/FAST_RAND_MAX; /* for range of 0 - 1.0 */
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}
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float Noise::tick()
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{
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return (float) ((2.0 * fast_rand() * inv_randmax) - 1.0);
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}
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