How compare Actor of a certain component to the player Actor

Development Programming & Scripting
1

So I have a component attached to multiple actors. Some which are AIs. I want to separate some functionality using a simple if statement. Now I know I could separate this using subclasses but that will not do what I want. I specifically want this “dirty” way of doing it (just debugging).

From the component I can get the owner like so:

AActor *b = Cast<AActor>(this->GetOwner());

But trying to get the first player controller actor crashes the editor.

AActor *a = GetWorld()->GetFirstPlayerController()->GetCharacter()->GetParentActor();

Even if that would not crash I cannot find how to properly compare two Actors to make sure it is in fact the correct one (in this case the possesed default player). Searching for answers I find some information but only in Blueprint and looking at the C++ API I cannot find the same functions.

Can anyone help me with this?

2

GetCharacter() returns an ACharacter object, and because ACharacter is a child class of AActor, the result is already the actor you want to retrieve. So there’s no need to call GetParentActor() on that, and this call will probably return NULL.

3

Thanks. I also noticed that the == operator works for Actor comparison.

4

Can you please give more details: I have this code to check collision, and it can NOT compare Actor with Character thou. How do I fix this?

in .cpp file:

void APickup::OnPickedup(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult)
{
	
	if (OtherActor == UGameplayStatics::GetPlayerCharacter(this, 0)) {
		UE_LOG(LogTemp, Warning, TEXT(" ---- collision ---- "));
		Destroy();
	}
}

in .h file

UFUNCTION()
void OnPickedup(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult);
5

Cast otheractor to ACharacter and first check if this object is valid. then compare the casted acharacter with your playercharacter

6

… Many thanks, it works now… : ) ,

void APickup::OnPickedup(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult)
{
	ACharacter* OtherCharacter = Cast<ACharacter> (OtherActor);
	if (OtherCharacter != nullptr) {
		if (OtherCharacter == UGameplayStatics::GetPlayerCharacter(this, 0)) {
			UE_LOG(LogTemp, Warning, TEXT(" ---- collision ---- "));
			Destroy();
		}
	}
}
7

@emperor_katax that snipit wasn’t working for me. This solution did the trick:

OtherActor == UGameplayStatics::GetPlayerPawn(this, 0)
8

many thanks dude … ; ] ,