59 lines
2.5 KiB
C++
59 lines
2.5 KiB
C++
/*
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* ICE / OPCODE - Optimized Collision Detection
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* http://www.codercorner.com/Opcode.htm
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*
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* Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
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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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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Contains code for random generators.
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* \file IceRandom.h
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* \author Pierre Terdiman
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* \date August, 9, 2001
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef __ICERANDOM_H__
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#define __ICERANDOM_H__
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FUNCTION ICECORE_API void SRand(udword seed);
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FUNCTION ICECORE_API udword Rand();
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//! Returns a unit random floating-point value
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inline_ float UnitRandomFloat() { return float(Rand()) * ONE_OVER_RAND_MAX; }
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//! Returns a random index so that 0<= index < max_index
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ICECORE_API udword GetRandomIndex(udword max_index);
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class ICECORE_API BasicRandom
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{
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public:
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//! Constructor
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inline_ BasicRandom(udword seed=0) : mRnd(seed) {}
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//! Destructor
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inline_ ~BasicRandom() {}
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inline_ void SetSeed(udword seed) { mRnd = seed; }
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inline_ udword GetCurrentValue() const { return mRnd; }
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inline_ udword Randomize() { mRnd = mRnd * 2147001325 + 715136305; return mRnd; }
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private:
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udword mRnd;
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};
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#endif // __ICERANDOM_H__
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