UKismetMathLibrary::SeedRandomStream
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintCallable
Description
Reseeds a random stream using the engine's global RNG (FMath::Rand), producing a new, unpredictable starting point for subsequent draws.
Caveats & Gotchas
- • Because it seeds from FMath::Rand(), the result is only as unpredictable as the global RNG's current state — it is not suitable if you need cryptographic randomness or independence from other code that also calls FMath::Rand.
- • This makes the stream's future sequence non-deterministic, which defeats the point of using an FRandomStream for reproducible results — use SetRandomStreamSeed with a known value instead if determinism matters.
Signature
static void SeedRandomStream(UPARAM(ref) FRandomStream& Stream)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| Stream | FRandomStream& | The random stream to reseed. | — |
Return Type
void Example
Give a stream a fresh unpredictable seed C++
UKismetMathLibrary::SeedRandomStream(LootStream);
int32 Roll = UKismetMathLibrary::RandomIntegerFromStream(LootStream, 100);Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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