Replicating UObject Containing UActorComponent

Development Programming & Scripting Multiplayer & Networking
4

I think you got me on the right track but I am still having problems replicating the inner inventory. Your last paragraph is what I am trying to implement.

In my UItem base class, I created a new function:

bool UItem::ReplicateSubobjects(UActorChannel* Channel, FOutBunch* Bunch, FReplicationFlags* RepFlags)
{
	// base class has no subobjects to replicate
	return false;
}

In my backpack (UWearableInventoryItem) I override this new function with:

bool UWearableInventoryItem::ReplicateSubobjects(UActorChannel* Channel, FOutBunch* Bunch, FReplicationFlags* RepFlags)
{
	bool bWroteSomething = false;
	
	//if (Channel->KeyNeedsToReplicate(Inventory->GetUniqueID(), Inventory->GetReplicatedItemsKey()))
	{
		bWroteSomething = Channel->ReplicateSubobject(Inventory, *Bunch, *RepFlags);
	}

	return bWroteSomething;
}

In my UInventoryComponent I called the new function so that subobjects of each UItem could be written to the channel

bool UInventoryComponent::ReplicateSubobjects(UActorChannel* Channel, FOutBunch* Bunch, FReplicationFlags* RepFlags)
{
	bool bWroteSomething = Super::ReplicateSubobjects(Channel, Bunch, RepFlags);

	if(Channel->KeyNeedsToReplicate(GetUniqueID(), ReplicatedItemsKey))
	{
		for(auto& Item : Items)
		{
			// provides an opportunity for Item to replicate subobjects
			bWroteSomething |= Item->ReplicateSubobjects(Channel, Bunch, RepFlags);
			
			if(Channel->KeyNeedsToReplicate(Item->GetUniqueID(), Item->RepKey))
			{
				bWroteSomething |= Channel->ReplicateSubobject(Item, *Bunch, *RepFlags);				
			}
		}
	}

	return bWroteSomething;
}

So far my UInventoryComponent inside the UItem contains no items after replication. I wanted to respond where I am so far to make sure I understood what you were saying, but I am also trying to simplify my project to make debugging easier. I’ll report back more information once I get a bit further in my testing. Thanks!