UAnimInstance::GetInstanceTransitionCrossfadeDuration

function Engine Blueprint Since 4.8

#include "Animation/AnimInstance.h"

Access: public Specifiers: UFUNCTION

Description

Returns the configured crossfade blend duration in seconds for a specific state machine transition. The value reflects the duration set in the transition's properties in the Animation Blueprint editor.

Caveats & Gotchas

• This returns the static authored duration, not the remaining or elapsed crossfade time. To check how far through a crossfade you are, use GetInstanceTransitionTimeElapsedFraction instead.
• TransitionIndex is compiler-assigned and fragile across recompiles. This function is primarily intended for internally generated AnimBP code; manually managing transition indices in C++ is brittle.

Signature

UFUNCTION(BlueprintPure, Category="Animation", meta=(BlueprintInternalUseOnly = "true"))
float GetInstanceTransitionCrossfadeDuration(int32 MachineIndex, int32 TransitionIndex) const;

Parameters

Name	Type	Description	Default
MachineIndex	int32	Index of the state machine containing the transition.	—
TransitionIndex	int32	Index of the transition within the state machine.	—

Return Type

float

Example

Log the crossfade duration for a specific transition C++

int32 MachineIdx     = GetStateMachineIndex(FName("LocomotionSM"));
int32 TransitionIdx  = 0; // From AnimBP compiled constant
float Duration = GetInstanceTransitionCrossfadeDuration(MachineIdx, TransitionIdx);
UE_LOG(LogAnim, Log, TEXT("Crossfade duration: %.3fs"), Duration);

Version History

Introduced in: 4.8

Version	Status	Notes
5.6	stable	—

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