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0b2d4d4879
Recommendation is to avoid using the year nomenclature as this information is already encoded in the git repo. Avoids needing to repeatly update. Also updates AUTHORS.txt from current repo with contributor names
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2016 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
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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 License
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* as published by the Free Software Foundation; either version 2
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* 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
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* GNU 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 License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file 3d_fastmath.cpp
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* @brief
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*/
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#include "3d_fastmath.h"
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// Fast Float Random Numbers
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// a small and fast implementation for random float numbers in the range [-1,1]
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// References : Posted by dominik.ries[AT]gmail[DOT]com
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// http://www.musicdsp.org/showone.php?id=273
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// set the initial seed to whatever you like
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static int s_randSeed = 1;
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// fast rand float, using full 32bit precision
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// returns in the range [-1, 1] (not confirmed)
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float Fast_RandFloat()
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{
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s_randSeed *= 16807;
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return (float)s_randSeed * 4.6566129e-010f;
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}
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// Fast rand, as described here:
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// http://wiki.osdev.org/Random_Number_Generator
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static unsigned long int s_nextRandSeed = 1;
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int Fast_rand( void ) // RAND_MAX assumed to be 32767
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{
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s_nextRandSeed = s_nextRandSeed * 1103515245 + 12345;
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return (unsigned int)(s_nextRandSeed >> 16) & 0x7FFF;
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}
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void Fast_srand( unsigned int seed )
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{
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s_nextRandSeed = seed;
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}
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