UAnimInstance::IsSlotActive

function Engine Blueprint Since 4.14

#include "Animation/AnimInstance.h"

Access: public Specifiers: UFUNCTIONBlueprintPure

Description

Returns true if the named slot node has a montage actively playing (not blending out). Use this to determine whether the slot is currently overriding the base pose.

Caveats & Gotchas

• A montage that is blending out is explicitly excluded from the 'active' definition here — the function returns false while blend-out is in progress even though the slot still affects the final pose.
• This function is marked BlueprintThreadSafe, so it may be called from animation graph nodes running on the worker thread; avoid accessing game-thread-only state alongside it.

Signature

ENGINE_API bool IsSlotActive(FName SlotNodeName) const;

Parameters

Name	Type	Description	Default
SlotNodeName	FName	The slot node to query.	—

Return Type

bool

Example

Prevent locomotion from overriding an active upper-body slot C++

bool bUpperBodyBusy = AnimInstance->IsSlotActive(FName("UpperBodySlot"));
if (!bUpperBodyBusy)
{
    // Safe to transition to idle
}

Version History

Introduced in: 4.14

Version	Status	Notes
5.6	stable	—

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