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Working with Recipes and Other Small Modifications in Minecraft

Dec 16, 2015

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Sams Teach Yourself Mod Development for Minecraft in 24 Hours, 2nd Edition

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Using Special `ItemStacks`

It is possible to use a special ItemStack in a recipe. To do that, you first have to create an ItemStack object and then use that in the recipe. Following is an example that creates a stone sword with sharpness 1 from a stone sword and a flint. This code uses a new file, so be sure to import it.

ItemStack enchantedSwordItemStack = new ItemStack(Items.stone_sword);
enchantedSwordItemStack.addEnchantment(Enchantment.sharpness, 1);

GameRegistry.addShapelessRecipe(enchantedSwordItemStack,
       Items.flint, Items.stone_sword
);

This code first creates an object of a normal stone sword. It then adds the sharpness enchantment of level 1 to it. Next, a shapeless recipe is added with the enchanted stone sword as the resulting item. The sword is crafted using a flint and a normal stone sword.

Figure 3.5 displays this recipe in game.

FIGURE 3.5 An enchantment recipe.

Try It Yourself: Creating a Knockback Sword

Try to create a sword with knockback using the code displayed previously, follow these three steps.

Create an ItemStack of any kind of sword.
Add the knockback enchantment to it.
Create a recipe using an unenchanted version of the sword along with gunpowder, with the returned item being the enchanted sword.

The code answer:

ItemStack knockbackItemStack = new ItemStack(Items.stone_sword);
knockbackItemStack.addEnchantment(Enchantment.knockback, 1);

GameRegistry.addShapelessRecipe(knockbackItemStack,
       Items.gunpowder, Items.stone_sword
);

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