Notify actor overlaping

Development Programming & Scripting
1

Hi! Does someone know how to notify actor overlapping in c++? I suspected that there is some event. I found OnComponentBeginOverlap() but I have no idea how to use it. Can someone help me with this?

2

This may help you

3

If you want to use OnComponentBeginOverlap(), you will need to use Delegates.

Step1: Register your PrimitiveComponent to receive the delegate broadcast

YourComponentPrimitive->OnComponentBeginOverlap.AddUniqueDynamic(this, &YourComponent::CapsuleTouched);

Step2: Create the function to handle the delegate call.

void YourComponent::CapsuleTouched( AActor* Other, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult )

Now you have any information you need about the actors overlapping each other.

Step 3: Make sure to clean up your delegates when the actor is removed

if (YourComponentPrimitive->OnComponentBeginOverlap.IsBound())
	{
		YourComponentPrimitive->OnComponentBeginOverlap.RemoveDynamic(this, &YourComponentPrimitive::CapsuleTouched);
	}

Hope that helps =)

4

I’m still having some problems…

I have this in my header file

UFUNCTION()
void CapsuleTouched();

and this in my constructor .cpp

CollisionSphere->OnComponentBeginOverlap.AddUniqueDynamic(this, &AMyActorClass::CapsuleTouched);

and this below

void AMyActorClass::CapsuleTouched(AActor* Other, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

but compiler is giving me some crazy errors

5

You need to add the arguments to be passed into the function

UFUNCTION()
	void CapsuleTouched(AActor* Other, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

Hopefully that is it =)

6

Yes. That was it. Thank you very much :slight_smile: