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[1.12.2]Sync item Nbt and meta to client?


tt36999

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I have some problem whit item nbt.

I created a item with some nbt data, but when i add tooltip and durability bar to the item , the tooltip and durability bar didn't update at all

@Override
public double getDurabilityForDisplay(ItemStack stack) {
    return (getDurable(stack) / getMaxDurable(stack));
}
@Override
public boolean showDurabilityBar(ItemStack stack) {
    return true;
}
 @Override
public void addInformation(ItemStack stack, @Nullable World worldIn, List<String> tooltip, ITooltipFlag flagIn) {
    tooltip.add(I18n.format("tooltip.test") + ": " + getDurable(stack));
}

 

These code are written in my item class

 

this ItemStack was created by my machine, I use custom recipe handler class and add nbt tag before apply output(all these code run in server side, i use !world.isRemote to ensure all checkCanCraft , costInputItem and applyOutPut run in server)

 

I think maybe nbt data didn't sync to client, and tried log NBT data in showDurabilityBar method

when i use 

MOD.logger.info(getTagCompound().getCompoundTag("ma_data").toString());

console show me right nbt data string like "{"ma_data":{"Durable":1000.0}}"

but when i use 

MOD.logger.info(getTagCompound().getCompoundTag("ma_data").getDouble("Durable"));//this line show me 0.0d in console
MOD.logger.info(getTagCompound().getCompoundTag("ma_data").getTag("Durable"));// this line show me null in console

I am sure of the item has correct nbt(At least in server side)

 

What am I doing wrong?

 

Edited by tt36999
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I usually send a packet explicitly to force the update to the client. This is because the order you do things to create the packet then add the NBT might miss the automatic update packets. For example, I think if you create an Item and add the NBT and then put it in a slot you will probably be automatically updated, but if you take an item already in a slot and add the NBT then probably not.

 

You can use a vanilla packet, but the packet you use depends on where the item is currently residing. For example, if it is in a GUI then I think you would send an SPacketWindowItems packet. If it is is some of the player's equipment (worn armor or something in either hand) then you would send an SPacketEntityEquipment packet and if it is in the hotbar then use SPacketHeldItemChanged.

 

Now, I think it is supposed to automatically update in most/many cases but personally I've found sending an explicit packet solves these sorts of things sometimes.

 

Other than that, I would say just trace the execution including any packets sent, looking at the payload involved to see if the information you're expecting is there.

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