UKismetMathLibrary::Vector_Reciprocal
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPure
Description
Returns a vector where each component is the reciprocal (1/x) of the corresponding input component. Zero components are replaced with a very large number (BIG_NUMBER) to avoid division by zero.
Caveats & Gotchas
- • Zero components are silently replaced with BIG_NUMBER (~3.4e38), not with infinity or NaN. Code that expects IEEE infinity or zero-check semantics will behave unexpectedly — inspect the result before using it in further math.
- • This is primarily a utility for per-component scaling inversion (e.g. undoing a scale vector). Using it to invert a direction vector for division produces numerically large values near zero axes that can overflow downstream calculations.
Signature
static UE_INL_API FVector Vector_Reciprocal(const FVector& A);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | const FVector& | The vector whose components to invert. | — |
Return Type
FVector Example
Invert a scale vector for un-scaling C++
FVector ActorScale = GetActorScale3D();
FVector InvScale = UKismetMathLibrary::Vector_Reciprocal(ActorScale);
// Apply to a child transform that needs to cancel the parent scale
ChildTransform.SetScale3D(InvScale);Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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