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Engine directory for ticket #1

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DavidWyand-GG 2012-09-19 11:15:01 -04:00
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Engine/lib/opcode/Ice/IceRandom.h Normal file
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains code for random generators.
* \file IceRandom.h
* \author Pierre Terdiman
* \date August, 9, 2001
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __ICERANDOM_H__
#define __ICERANDOM_H__
FUNCTION ICECORE_API void SRand(udword seed);
FUNCTION ICECORE_API udword Rand();
//! Returns a unit random floating-point value
inline_ float UnitRandomFloat() { return float(Rand()) * ONE_OVER_RAND_MAX; }
//! Returns a random index so that 0<= index < max_index
ICECORE_API udword GetRandomIndex(udword max_index);
class ICECORE_API BasicRandom
{
public:
//! Constructor
inline_ BasicRandom(udword seed=0) : mRnd(seed) {}
//! Destructor
inline_ ~BasicRandom() {}
inline_ void SetSeed(udword seed) { mRnd = seed; }
inline_ udword GetCurrentValue() const { return mRnd; }
inline_ udword Randomize() { mRnd = mRnd * 2147001325 + 715136305; return mRnd; }
private:
udword mRnd;
};
#endif // __ICERANDOM_H__