So how would one go about syncing the values of a capability attached to an ItemStack from server to client? I need these values to display the durability bar for the stack and for the addInformation method. The problem I'm having with packets is I don't know how to send this data to the specific stack unless there's a way to track the stack with an id or something that i'm unaware of.

No idea why I didn't think of this before, I'm already using the onUpdate method in the Item to check if the capability is "dirty" or needs its data to be sent. onUpdate actually gives me the slot id the stack is in so I can just use that to update that specific slot on the client.

No idea why I didn't think of this before, I'm already using the onUpdate method in the Item to check if the capability is "dirty" or needs its data to be sent. onUpdate actually gives me the slot id the stack is in so I can just use that to update that specific slot on the client.

 

Note that

Item#onUpdate

is called when the item is in any of the player's three inventory sections (main, armour, off hand) and the slot argument will be relative to the start of that inventory; e.g. slot 0 could be slot 0 of the main inventory, slot 0 of the armour inventory or slot 0 of the off hand inventory.

 

You need to search through each inventory section and check if the

ItemStack

in the specified slot is the same as the

ItemStack

argument.

 

I use this method to perform an operation for the specified inventory sections in

Item#onUpdate

. You can see the usages here, here and here.

Yea I figured out fairly quick that the offhand and first slot of the hotbar were both slot 0, I did not however know about the armor bit. Thank you.