UKismetMathLibrary::EqualExactly_VectorVector
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Returns true if vectors A and B are bitwise-identical (zero tolerance). Use only when vectors have been set programmatically to the same value, not when comparing results of floating-point arithmetic.
Caveats & Gotchas
- • Floating-point arithmetic almost never produces bitwise-equal results even when mathematically equal — two paths to the 'same' vector (e.g. adding then subtracting the same amount) will frequently return false. Use EqualEqual_VectorVector with a tolerance instead.
- • Comparing against FVector::ZeroVector exactly is one of the few safe uses; for anything derived from physics simulation or interpolation, exact equality is unreliable.
Signature
static UE_INL_API bool EqualExactly_VectorVector(FVector A, FVector B);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | FVector | First vector. | — |
| B | FVector | Second vector. | — |
Return Type
bool Example
Check if a vector is exactly the zero vector C++
FVector Velocity = MyActor->GetVelocity();
bool bAtRest = UKismetMathLibrary::EqualExactly_VectorVector(Velocity, FVector::ZeroVector);Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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