51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
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/*
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Copyright (c) 2003-2013 Gino van den Bergen / Erwin Coumans http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef B3_GEN_RANDOM_H
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#define B3_GEN_RANDOM_H
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#include "b3Scalar.h"
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#ifdef MT19937
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#include <limits.h>
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#include <mt19937.h>
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#define B3_RAND_MAX UINT_MAX
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B3_FORCE_INLINE void b3Srand(unsigned int seed) { init_genrand(seed); }
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B3_FORCE_INLINE unsigned int b3rand() { return genrand_int32(); }
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#else
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#include <stdlib.h>
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#define B3_RAND_MAX RAND_MAX
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B3_FORCE_INLINE void b3Srand(unsigned int seed) { srand(seed); }
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B3_FORCE_INLINE unsigned int b3rand() { return rand(); }
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#endif
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inline b3Scalar b3RandRange(b3Scalar minRange, b3Scalar maxRange)
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{
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return (b3rand() / (b3Scalar(B3_RAND_MAX) + b3Scalar(1.0))) * (maxRange - minRange) + minRange;
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}
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#endif //B3_GEN_RANDOM_H
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