I'm creating a mod that has ore chunks remember where they were mined at. This works fine when a player is the one mining, but I plan to add mining vehicles with storage. I'm currently using onUpdate to store the chunk location it was mined at in NBT, but onUpdate only executes when the item is held by a player. If I make the item and it goes directly into a container, it will not store where it was created.

 

Is there a method in the Item class I can somehow use to store data into the ItemStack NBT when it is created? onCreated is for the item instance.

 

@Override
	public void onUpdate(ItemStack stack, World worldIn, Entity entityIn, int itemSlot, boolean isSelected) {
		BlockPos playerPos = entityIn.getPosition();
		Chunk creationChunk = worldIn.getChunkFromBlockCoords(playerPos);
		if(stack.getTagCompound() == null) {
			stack.setTagCompound(new NBTTagCompound());
		}
		NBTTagCompound tagcompound = stack.getTagCompound();
		int[] chunk = tagcompound.getIntArray("chunk");
		if(chunk.length == 0) {
			int[] array = { creationChunk.x, creationChunk.z };
			tagcompound.setIntArray("chunk", array);
			stack.setTagCompound(tagcompound);
		}	
		super.onUpdate(stack, worldIn, entityIn, itemSlot, isSelected);
	}

 

Option a: have your machines call onUpdate() on their stacks

Option b: have your machines give the stacks the NBT

10 minutes ago, hiotewdew said:

Is there a method in the Item class I can somehow use to store data into the ItemStack NBT when it is created?

No

10 minutes ago, hiotewdew said:

onCreated is for the item instance.

That's false.

     /**
     * Called when item is crafted/smelted. Used only by maps so far.
     */
    public void onCreated(ItemStack stack, World worldIn, EntityPlayer playerIn)
    {
    }

 

20 minutes ago, Draco18s said:

Option a: have your machines call onUpdate() on their stacks 

Option b: have your machines give the stacks the NBT

Thank you!

 I will be doing this.