Hi,

 

I've made a block with a single inventory slot (according to this tutorial: http://www.minecraftforge.net/wiki/Containers_and_GUIs) and everything works fine. Know I want to change the appearance of the block based on the item in the inventory. I implemented the ISimpleBlockRenderingHandler interface and in the renderWorldBlock method I want to get the item stored in the inventory like this:

 

TileEntityTiny tileEntity = (TileEntityTiny) world.getBlockTileEntity(x, y, z);
ItemStack itemStack = tileEntity.getStackInSlot(0);

 

The problem with this is: itemStack is null, until I opened the GUI once. The readFromNBT() method of the TileEntity gets called correctly, so I assume it might be a synching problem with the client, but I have no clue, where to look at.

 

Thanks for your help!

Thanks a lot! This is my solution:

 

	
@Override
public Packet getDescriptionPacket() {
	NBTTagCompound tagCompound = new NBTTagCompound();
	this.writeToNBT(tagCompound);

	return new Packet132TileEntityData(xCoord, yCoord, zCoord, 0, tagCompound);
}

@Override
public void onDataPacket(INetworkManager net, Packet132TileEntityData pkt) {		
	this.readFromNBT(pkt.customParam1);
}