Hello modder-friends  !

I'm beginner at modding and wanted to make a "wrench" like the wrench from Thermal Expansion!

When you click with the wrench on a block the block gets deleted and you get it as item back.

I tried damaging the tool:

 

 public class ItemMeatTool extends ItemTool{


private static final Set field_150915_c = Sets.newHashSet(new Block[] {TestMod.blockMeat, TestMod.blockCookedMeat, TestMod.blockSpecialMeat});

protected ItemMeatTool(float p_i45333_1_, ToolMaterial p_i45333_2_,
		Set p_i45333_3_) {
	super(p_i45333_1_, p_i45333_2_, p_i45333_3_);
	// TODO Auto-generated constructor stub
}

 protected ItemMeatTool(Item.ToolMaterial p_i45347_1_)
    {
        super(2.0F, p_i45347_1_, field_150915_c);
    }

 public boolean onItemUse(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, World par3World, int par4, int par5, int par6, int par7, float par8, float par9, float par10)
 {

	 if(blockSpecialMeat.breakBlock = true) { 

		 par1ItemStack.damageItem(1, par2EntityPlayer);

		 blockSpecialMeat.breakBlock = false; //<----- This is just a variable from the block-class that checks if I click with the wrench on the block
                                                                                    //the variable is true when I clicked on the block with the wrench
	 }


	return true;	 
 }
} 

 

I clicked on the block and the item lost 1 durability! Great! Not! When I updatet the item (clicked on it in my inventory) it said the old durability again!

 

I'm very confused from that! I hope someone can help me!

 

This damages the Item and plays a break sound and deletes it.

if (itemStack.attemptDamageItem(1, rand)) {
            itemStack.stackSize--;
            if (itemStack.stackSize < 0)
                itemStack.stackSize = 0;
            itemStack.setItemDamage(0);
            itemStack = null;
            Minecraft.getMinecraft().getSoundHandler().playSound(PositionedSoundRecord.func_147673_a(new ResourceLocation("random.break")));
        }

You can get a the "rand" from the player by using

player.getRNG()

I added the code and when I click on the block it removes the durability! But as soon as I update the Item it drops back   It's like "Hmmm You broke that block lets remove 1 durability!, Oh wait! The block is not there let'S add one durability again!" It#s really weird I don't really understand why it's removing durability and then adding again

Make sure its called on the client and the server. Your blockSpecialMeat.breakBlock variable is probably only true on the client. You can test is by using a simple println at the place where you damage the item. The print should appear twice.