void FHierarchicalLODUtilities::DestroyCluster(ALODActor* InActor)
{
// Find if it has a parent ALODActor
AActor* Actor = CastChecked<AActor>(InActor);
UWorld* World = Actor->GetWorld();
ALODActor* ParentLOD = GetParentLODActor(InActor);
const FScopedTransaction Transaction(LOCTEXT("UndoAction_DeleteCluster", "Deleting a (invalid) Cluster"));
Actor->Modify();
World->Modify();
if (ParentLOD != nullptr)
{
ParentLOD->Modify();
ParentLOD->RemoveSubActor(Actor);
}
// Clean out sub actors and update their LODParent
while (InActor->SubActors.Num())
{
AActor* SubActor = InActor->SubActors[0];
SubActor->Modify();
InActor->RemoveSubActor(SubActor);
}
// Also destroy the cluster's data
DestroyClusterData(InActor);
World->DestroyActor(InActor);
if (ParentLOD != nullptr && !ParentLOD->HasValidSubActors())
{
DestroyCluster(ParentLOD);
}
}
void FHierarchicalLODUtilities::DestroyLODActor(ALODActor* InActor)
{
const FScopedTransaction Transaction(LOCTEXT("UndoAction_DeleteLODActor", "Delete LOD Actor"));
UWorld* World = InActor->GetWorld();
World->Modify();
InActor->Modify();
ALODActor* ParentActor = FHierarchicalLODUtilities::GetParentLODActor(InActor);
FHierarchicalLODUtilities::DestroyCluster(InActor);
World->DestroyActor(InActor);
if (ParentActor && !ParentActor->HasValidSubActors())
{
ParentActor->Modify();
FHierarchicalLODUtilities::DestroyLODActor(ParentActor);
}
}