UKismetMathLibrary::ComposeTransforms
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Composes two transforms as A * B, yielding a transform that first applies A and then B. Used to concatenate local-to-parent and parent-to-world transforms, or to apply a delta in a specific space.
Caveats & Gotchas
- • Order is critical and non-commutative: A * B ≠ B * A in general. `ComposeTransforms(Delta, LocalToWorld)` applies Delta in local space; `ComposeTransforms(LocalToWorld, Delta)` applies Delta in world space — swapping the arguments gives a completely different result.
- • Non-uniform scale in both A and B can produce shear, which FTransform does not represent; the resulting scale may be incorrect. If either transform has non-uniform scale, prefer composing without scale or use FMatrix for full shear support.
Signature
static UE_INL_API FTransform ComposeTransforms(const FTransform& A, const FTransform& B)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | const FTransform& | The first transform to apply (inner/left). | — |
| B | const FTransform& | The second transform to apply (outer/right). | — |
Return Type
FTransform Example
Apply a local-space offset to an actor's world transform C++
FTransform LocalOffset = UKismetMathLibrary::MakeTransform(FVector(100, 0, 0), FRotator::ZeroRotator);
FTransform WorldTM = UKismetMathLibrary::ComposeTransforms(LocalOffset, Actor->GetActorTransform());See Also
Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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