AZ::Sfmt Class Reference

Public Member Functions
	Sfmt ()
	By default we seed with Seed()
	Sfmt (const AZ::u32 *keys, int numKeys)
	Seed the generator with user defined seed Seed(AZ::u32* keys, int numKeys)
void	Seed ()
	Seed the generator, with the best pseudo-random number the system can generate BetterPseudoRandom.
void	Seed (const AZ::u32 *keys, int numKeys)
	Seed the generator with user defined seed.
AZ::u32	Rand32 ()
	Return u32 pseudo random integer.
AZ::u64	Rand64 ()
	Return u64 pseudo random integer. IMPORTANT: You can't call Rand64 after Rand32 (you need 2x Rand32).
void	FillArray32 (AZ::u32 *array, int size)
	Fill an array with u32 pseudo random integers. array size MUST be > GetMinArray32Size() and a multiple of 4 (16 bytes since we use SIMD).
void	FillArray64 (AZ::u64 *array, int size)
	Fill an array with u64 pseudo random integers. array size MUST be > GetMinArray64Size() and a multiple of 2 (16 bytes since we use SIMD).
double	RandR32 ()
	returns [0,1]
double	RandR32_1 ()
	returns [0,1)
double	RandR32_2 ()
	returns (0,1)
int	GetMinArray32Size () const
	Get the minimum array 32 size for FillArray32 function.
int	GetMinArray64Size () const
	Get the minimum array 32 size for FillArray64 function.

Static Public Member Functions
static Sfmt &	GetInstance ()
static void	Create ()
	Creates a global instance of Smft using AZ::EnvironmentVariable.
static void	Destroy ()
	Releases a global instance of Smft.

Protected Member Functions
void	PeriodCertification ()

Protected Attributes
SfmtInternal::w128_t	m_sfmt [SfmtInternal::N]
size_t	m_index = 0
AZ::u32 *	m_psfmt32 = nullptr
	Index into the pre-generated tables.
AZ::u64 *	m_psfmt64 = nullptr
	Read only tables of pre-generated random numbers.
AZStd::mutex	m_sfmtMutex

Member Function Documentation

GetInstance()

static Sfmt & AZ::Sfmt::GetInstance ( )

static

Returns the default global instance of the Sfmt, initialized with time(NULL) as seed. We recommend creating your own instances when you need a big set of random numbers.

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The documentation for this class was generated from the following file:

• Code/Framework/AzCore/AzCore/Math/Sfmt.h