Okay. I've tried everything, and I cannot figure out what I'm doing wrong. This seems like the only help there is on this subject: http://pastebin.com/SnPaAvUd, and it doesn't work. Instead of the item being damaged, it gets used up. This is my code that I'm working with:

 

// My item class.

public class ItemKnifeBase extends Item {

public ItemKnifeBase(ToolMaterial material) {
	this.setCreativeTab(ToolForgeryMod.tabToolForgery);
	this.setUnlocalizedName(ToolForgeryMod.MOD_ID + ":knife_" + material.toString().toLowerCase());
	this.setTextureName(ToolForgeryMod.RESOURCES_PREFIX + "knife_" + material.toString().toLowerCase());
	this.setMaxDamage(material.getMaxUses());
}

@Override
public ItemStack getContainerItem(ItemStack itemStack) {
	ItemStack result = itemStack.copy();
	result.setItemDamage(result.getItemDamage() + 1);
	result.stackSize = 1;
	return result;
}

@Override
public boolean doesContainerItemLeaveCraftingGrid(ItemStack p_77630_1_) {
	return false;
}

}

 

// Registering the crafting recipe in the preInit() method.

GameRegistry.addShapelessRecipe(new ItemStack(Blocks.planks, 4, 0), new ItemStack(Blocks.log, 1, 0), new ItemStack(TFItems.knife_stone, 1, OreDictionary.WILDCARD_VALUE));

 

To clarify, the recipe shows up, and I can use it, but instead of damaging the knife, the knife gets used up. And I'm registering the item before the recipe.

 

SOLUTION: You need to add

 

@Override
public boolean hasContainerItem() {
return true;
}

 

to the item's class.

https://github.com/KeeperofMee/ClayMod/blob/master/claymod/items/CmChisel.java

 

btw you might wanna add "this.setNoRepair();" no quotes, otherwise it will be possible to duplicate it forever.