Add a Box Component at runtime to another actor

Development Programming & Scripting C++
1

Hey, iam curently trying to bring my Blueprint “Code” over to C++. Iam struggeling about a … clearly simple problem.

Iam trying to add a BoxComponent to an Actor at runtime wich is not the addin Actor.

Cant get this thing to work… I have tried many variations of attaching the box to the new parent but none worked… maybe there is also a problem with my code… :frowning:


void ABrush_Master::CreateTraceBox(AActor* Parent, FVector Location, FVector Extents, FRotator Rotation, ECollisionChannel TraceChannel, bool Visivle, bool ArrowComponent)
{
	//No Valid Parent just exit
	if (!Parent) return;

	FTransform _Transform = FTransform(Rotation, Location, FVector(1, 1, 1));

	UBoxComponent* _BoxComponent = NewObject<UBoxComponent>(Parent);

	_BoxComponent->SetWorldTransform(_Transform);
	_BoxComponent->SetBoxExtent(Extents);
	_BoxComponent->SetVisibility(true);
	_BoxComponent->SetHiddenInGame(false);
	_BoxComponent->AttachParent = Parent->GetRootComponent();

	//Parent->AddOwnedComponent(_BoxComponent);
	//_BoxComponent->AttachTo(Parent->GetRootComponent());

}
2

You need to call _BoxComponent->RegisterComponent() once you’ve finished initializing it. I’m not sure if that is the only thing that is missing, but that is definitely going to help you.

1 Like
3

if that will work… you are my personal hero of the day :slight_smile: