AActor::OnActorBeginOverlap

property Engine Blueprint Since 4.0

#include "GameFramework/Actor.h"

Access: public Specifiers: UPROPERTYBlueprintAssignable

Description

Multicast delegate fired when another actor begins overlapping this actor. Bind to this in Blueprint or C++ to respond to overlap entry events without subclassing.

Caveats & Gotchas

• Both this actor's components and the overlapping actor's components must have bGenerateOverlapEvents = true (or Generate Overlap Events in the editor) for this delegate to fire. A common setup mistake is enabling it only on one side.
• This fires at the actor level — for more granular per-component overlap info (which component specifically was hit), use UPrimitiveComponent::OnComponentBeginOverlap instead.
• Not called during level streaming load unless bGenerateOverlapEventsDuringLevelStreaming is true on this actor.

Signature

UPROPERTY(BlueprintAssignable, Category="Collision")
FActorBeginOverlapSignature OnActorBeginOverlap

Examples

Destroy a projectile when it overlaps an enemy character Blueprint

Bind to overlap in BeginPlay C++

void AMyTrigger::BeginPlay()
{
	Super::BeginPlay();
	OnActorBeginOverlap.AddDynamic(this, &AMyTrigger::HandleOverlapBegin);
}

void AMyTrigger::HandleOverlapBegin(AActor* OverlappedActor, AActor* OtherActor)
{
	UE_LOG(LogTemp, Log, TEXT("%s entered trigger"), *OtherActor->GetName());
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

Feedback

Was this helpful?