UKismetMathLibrary::RandomUnitVectorFromStream
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Returns a random vector of length 1.0, uniformly distributed over the unit sphere, drawn from a specific FRandomStream for reproducible results.
Caveats & Gotchas
- • Uses a rejection-sampling loop internally (FRandomStream::GetUnitVector), so it consumes a variable, unpredictable number of draws from the stream — do not assume it always advances the stream by a fixed amount.
- • For deterministic replay across a network match, all clients and the server must construct their FRandomStream with the same seed and call this in the same order, or results will diverge.
Signature
static FVector RandomUnitVectorFromStream(const FRandomStream& Stream)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| Stream | const FRandomStream& | The random stream to draw from. | — |
Return Type
FVector Example
Deterministic explosion debris direction C++
FRandomStream DebrisStream(ExplosionSeed);
FVector Direction = UKismetMathLibrary::RandomUnitVectorFromStream(DebrisStream);See Also
Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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