What is manual attachment option in add spline mesh component?

Development Programming & Scripting Blueprint
,
1

I only know that before enabling it if I were to add a Movable mesh it was sent to the wrong location, after enabling it all works correctly.

p1

2

UE engine code says as follows:

The user has the option of doing attachment manually where they have complete control or via the automatic rule that the first component added becomes the root component, with subsequent components attached to the root.

It basically says if you want to decide what would be a parent to currently spawned spline mesh component. See the code below, where the component attachement to the root is automatic.

USceneComponent* NewSceneComp = Cast<USceneComponent>(NewActorComp);
		if(NewSceneComp != nullptr)
		{
			if (!bManualAttachment)
			{
				if (RootComponent == nullptr)
				{
					RootComponent = NewSceneComp;
				}
				else
				{
					NewSceneComp->SetupAttachment(RootComponent);
				}
			}

			NewSceneComp->SetRelativeTransform(RelativeTransform);

			bIsSceneComponent = true;
		}