FRandomStream | Unreal Engine 4.27 Documentation

References


Module	Core
Header	/Engine/Source/Runtime/Core/Public/Math/RandomStream.h
Include	#include "Math/RandomStream.h"

struct FRandomStream

Implements a thread-safe SRand based RNG.

Very bad quality in the lower bits. Don't use the modulus (%) operator.

	Type	Name	Description
		FRandomStream ()	Default constructor.The seed should be set prior to use.
		FRandomStream ( int32 InSeed )	Creates and initializes a new random stream from the specified seed value.
		FRandomStream ( FName InName )	Creates and initializes a new random stream from the specified name.

Type	Name	Description
float	FRand ()	Mirrors the random number API in FMath
FVector::FReal	FRandRange ( FVector::FReal InMin, FVector::FReal InMax )	Helper function for rand implementations.
void	GenerateNewSeed ()	Generates a new random seed.
int32	GetCurrentSeed ()	Gets the current seed.
float	GetFraction ()	Returns a random float number in the range [0, 1).
int32	GetInitialSeed ()
FVector	GetUnitVector ()	Returns a random vector of unit size.
uint32	GetUnsignedInt ()	Returns a random number between 0 and MAXUINT.
void	Initialize ( FName InName )	Initializes this random stream using the specified name.
void	Initialize ( int32 InSeed )	Initializes this random stream with the specified seed value.
void	MutateSeed ()	Mutates the current seed into the next seed.
int32	RandHelper ( int32 A )	Helper function for rand implementations.
FVector	RandPointInBox ( const FBox& Box )
int32	RandRange ( int32 Min, int32 Max )	Helper function for rand implementations.
void	Reset ()	Resets this random stream to the initial seed value.
FString	ToString ()	Get a textual representation of the RandomStream.
FVector	VRand ()	Returns a random vector of unit size.
FVector	VRandCone ( FVector const& Dir, float ConeHalfAngleRad )	Returns a random unit vector, uniformly distributed, within the specified cone.
FVector	VRandCone ( FVector const& Dir, float HorizontalConeHalfAngleRad, float VerticalConeHalfAngleRad )	Returns a random unit vector, uniformly distributed, within the specified cone.