UActorComponent::ReceiveAsyncPhysicsTick

function Engine Blueprint Since 5.0

#include "Components/ActorComponent.h"

Access: public Specifiers: UFUNCTIONBlueprintImplementableEvent

Description

Blueprint-implementable event called on each async physics sub-step when bAsyncPhysicsTickEnabled is true. Runs on the physics thread, not the game thread.

Caveats & Gotchas

• This callback executes on the physics thread — accessing game-thread-only objects (e.g. UWorld, most UObjects) without proper synchronisation will cause data races or crashes.
• bAsyncPhysicsTickEnabled must be set to true on the component for this event to fire; it defaults to false. The component's owner actor must also have async physics enabled.

Signature

ENGINE_API void ReceiveAsyncPhysicsTick(float DeltaSeconds, float SimSeconds)

Parameters

Name	Type	Description	Default
DeltaSeconds	float	Physics sub-step delta time in seconds.	—
SimSeconds	float	Total elapsed simulation time since the physics sim began.	—

Return Type

void

Example

Override in C++ via AsyncPhysicsTickComponent C++

// Override the C++ hook, which calls ReceiveAsyncPhysicsTick for Blueprints:
void UMyComponent::AsyncPhysicsTickComponent(float DeltaTime, float SimTime)
{
	// Physics-thread-safe operations only
	FVector NewForce = ComputeForce(DeltaTime);
	GetOwner()->GetRootPrimitiveComponent()->AddForce(NewForce);
}

Version History

Introduced in: 5.0

Version	Status	Notes
5.6	stable	—

Feedback

Was this helpful?