ULimenGlobalRandomStreamSubsystem

Overview

The ULimenGlobalRandomStreamSubsystem class is a subsystem in the LimenCore plugin that provides functionality to generate random numbers and fractions. It initializes with a seed based on the current time or a specified seed, and offers methods to retrieve random values within specified ranges. The class ensures thread safety through the use of a critical section.

Properties

Type	Name	Access	Description
`FRandomStreamPtr`	GlobalRandomStream	Private	Shared pointer to the global random stream.
`FCriticalSection`	RandomStreamSection	Private	Critical section for thread-safe access to the random stream.

Functions

Return Type	Signature	Description
`void`	`Initialize(FSubsystemCollectionBase& Collection)`	Initializes the subsystem with a seed based on the current time or a specified seed.
`void`	`Deinitialize()`	Deinitializes the subsystem.
`void`	`SetSeed(const int32 Seed)`	Sets the seed for the random stream to the provided value.
`void`	`SetSeedWithCurrentTime()`	Sets the seed for the random stream using the current time.
`FRandomStreamRef`	`GetGlobalRandomStream()`	Returns a reference to the global random stream.
`float`	`RandomFloat()`	Generates and returns a random float between 0 and 1.
`float`	`GetFraction()`	Returns a random fraction between 0 and 1.
`int32`	`RandomIntRange(const int32 RangeStart, const int32 RangeEnd)`	Generates and returns a random integer within the specified range.
`float`	`RandomFloatRange(const float RangeStart, const float RangeEnd)`	Generates and returns a random float within the specified range.
`TArray<int32>`	`GenerateRandomUniqueNumbers(const int32 RangeStart, const int32 RangeEnd, const int32 Count)`	Generates an array of unique random integers within the specified range.
`TArray<int32>`	`GenerateRandomNumbers(const int32 RangeStart, const int32 RangeEnd, const int32 Count)`	Generates an array of random integers within the specified range.
`TArray<int32>`	`GenerateValidRandomUniqueNumbers(const int32 RangeStart, const int32 RangeEnd, const int32 Count, const TFunction<bool(const int32)>& IsNumberValid = [] (const int32) { return true; })`	Generates an array of unique random integers within the specified range that satisfy a given condition.
`TArray<int32>`	`GenerateValidRandomNumbers(const int32 RangeStart, const int32 RangeEnd, const int32 Count, const TFunction<bool(const int32)>& IsNumberValid = [] (const int32) { return true; })`	Generates an array of random integers within the specified range that satisfy a given condition.

Usage & Implementation Notes

The subsystem ensures thread safety by using a critical section to protect access to the global random stream.
The seed is initialized based on the current time in non-editor builds, ensuring different seeds for each session.
The GenerateValidRandomUniqueNumbers and GenerateValidRandomNumbers functions include a condition check that can be customized through a lambda function.

22 May 2026