Ok, so I have been trying for a while now to add knockback to an item I have modded in when it is crafted. I have seen people say to edit the .json recipe file like this:

{
	"type": "minecraft:crafting_shaped",
	"pattern": [
		"PPP",
		"PSI",
		"PSI"
	],
	"key": {
		"P": {
			"item": "halowip:pure_titanium"
		},
		"S": {
			"item": "minecraft:stick"
		},
		"I": {
			"item": "minecraft:iron_ingot"
		}
	},
	"result": {
		"item": "minecraft:gravity_hammer",
		"nbt": 
		{
			"ench":
			[
				{
					"id": "minecraft:knockback",
					"lvl": 99
				}
			]
		},
		"count": 1
	}
}

but it does not seem to work. I have also tried creating an enchantment class, but that doesn't work since I have my items purely under RegistryObject and not ItemStack (I may be stupid, feel free to correct me). I also have a github repo for my project for anyone who wants to look at it (it needs to be updated from about a day ago). Any help is appreciated!!!

i am not very good with this, where would i add it? my ItemsInit class or CustomWeaponsMaterial class?

Oh and i neglected to mention that I am in 1.16.5, which i know has a lot parity with older versions

package com.diglis.halowip.core.init;

import com.diglis.halowip.HaloWip;
import com.diglis.halowip.common.CustomArmorMaterial;
import com.diglis.halowip.common.PickaxeToolMaterial;
import com.diglis.halowip.core.itemgroup.HaloModItemGroupArmor;
import com.diglis.halowip.core.itemgroup.HaloModItemGroupMisc;
import com.diglis.halowip.core.itemgroup.HaloModItemGroupWeapons;

import net.minecraft.entity.ai.attributes.Attribute;
import net.minecraft.entity.ai.attributes.AttributeModifier;
import net.minecraft.inventory.EquipmentSlotType;
import net.minecraft.item.ArmorItem;
import net.minecraft.item.AxeItem;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.item.PickaxeItem;
import net.minecraft.item.SwordItem;
import net.minecraft.util.IItemProvider;
import net.minecraftforge.fml.RegistryObject;
import net.minecraftforge.registries.DeferredRegister;
import net.minecraftforge.registries.ForgeRegistries;

public class ItemInit {
	public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, HaloWip.MOD_ID);

	public static final RegistryObject<Item> ASSAULT_RIFLE = ITEMS.register("assault_rifle",
			() -> new Item(new Item.Properties().tab(HaloModItemGroupWeapons.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> RIFLE_AMMO = ITEMS.register("ammo_pouch", 
			() -> new Item(new Item.Properties().tab(HaloModItemGroupWeapons.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> RAW_TITANIUM = ITEMS.register("raw_titanium", 
			() -> new Item(new Item.Properties().tab(HaloModItemGroupMisc.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> PURE_TITANIUM = ITEMS.register("pure_titanium", 
			() -> new Item(new Item.Properties().tab(HaloModItemGroupMisc.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	public static final RegistryObject<Item> TITANIUM_PICKAXE = ITEMS.register("titanium_pickaxe", 
			() -> new PickaxeItem(CustomToolMaterial.TITANIUM_PICKAXE, 10, -1f, new Item.Properties().tab(HaloModItemGroupWeapons.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> GRAVITY_HAMMER = ITEMS.register("gravity_hammer", 
			() -> new AxeItem(CustomToolMaterial.GRAVITY_HAMMER, 7, -1f, new Item.Properties().tab(HaloModItemGroupWeapons.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> ENERGY_SWORD = ITEMS.register("energy_sword", 
			() -> new SwordItem(CustomToolMaterial.ENERGY_SWORD, 5, -1f, new Item.Properties().tab(HaloModItemGroupWeapons.HALO_CRAFTING_EVOLVED).setNoRepair()));
	
	public static final RegistryObject<Item> MASTER_CHIEF_HELMET = ITEMS.register("mk6_helm",
			() -> new ArmorItem(CustomArmorMaterial.MK6_ARMOR, EquipmentSlotType.HEAD, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	public static final RegistryObject<Item> MASTER_CHIEF_CHEST = ITEMS.register("mk6_chest", 
			() -> new ArmorItem(CustomArmorMaterial.MK6_ARMOR, EquipmentSlotType.CHEST, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	public static final RegistryObject<Item> MASTER_CHIEF_LEGGINGS = ITEMS.register("mk6_legs", 
			() -> new ArmorItem(CustomArmorMaterial.MK6_ARMOR, EquipmentSlotType.LEGS, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	public static final RegistryObject<Item> MASTER_CHIEF_BOOTS = ITEMS.register("mk6_boots", 
			() -> new ArmorItem(CustomArmorMaterial.MK6_ARMOR, EquipmentSlotType.FEET, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	public static final RegistryObject<Item> TRANSPARENT_MK6_HELM = ITEMS.register("mk6_clear", 
			() -> new ArmorItem(CustomArmorMaterial.NOVISR_MK6_HELM, EquipmentSlotType.HEAD, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED)));
	
	public static final RegistryObject<Item> BLUE_MK6_HELM = ITEMS.register("mk6_blue", 
			() -> new ArmorItem(CustomArmorMaterial.BLUE_MK6_HELM, EquipmentSlotType.HEAD, new Item.Properties().tab(HaloModItemGroupArmor.HALO_CRAFTING_EVOLVED).fireResistant()));
	
	
}

would it be in this class?

Ok i created a new class like this:

package com.diglis.halowip.common;

import net.minecraft.entity.ai.attributes.Attribute;
import net.minecraft.item.Item;

public class weaponAttributes extends Item {

	public weaponAttributes(Properties p_i48487_1_) {
		super(p_i48487_1_);
		// TODO Auto-generated constructor stub
	}
	
	public Attribute getAttribute() {
		return null;
	}

}

Is this right or am i all wrong?

Yes, I am just very new to the forge api, and you are being rather vague. I am guessing getAttribute is a method you can use (with dot notation) but I am not sure as to where to apply it in my code.

public enum PickaxeToolMaterial implements IItemTier {
	TITANIUM_PICKAXE(4, 10000, 100f, 5f, 17, () -> Ingredient.of(ItemInit.PURE_TITANIUM.get())),
	ENERGY_SWORD(4, 100, 5f, 20f, 0, () -> Ingredient.of(ItemInit.PURE_TITANIUM.get())),
	GRAVITY_HAMMER(4, 7000, 1f, 9.6f, 17, () -> Ingredient.of(ItemInit.PURE_TITANIUM.get()));
	
	private final int harvestLevel;
	private final int maxUses;
	private final float efficiency;
	private final float attackDamage;
	private final int enchantability;
	private final Ingredient repairMaterial; 

	PickaxeToolMaterial(int harvestLevel, int maxUses, float efficiency, float attackDamage, int enchantability, Supplier<Ingredient> repairMaterial) {
		this.harvestLevel = harvestLevel;
		this.maxUses = maxUses;
		this.efficiency = efficiency;
		this.attackDamage = attackDamage;
		this.enchantability = enchantability;
		this.repairMaterial = repairMaterial.get();
	}
	
	@Override
	public int getUses() {
		// TODO Auto-generated method stub
		return this.maxUses;
	}

	@Override
	public float getSpeed() {
		// TODO Auto-generated method stub
		return this.efficiency;
	}

	@Override
	public float getAttackDamageBonus() {
		// TODO Auto-generated method stub
		return this.attackDamage;
	}

	@Override
	public int getLevel() {
		// TODO Auto-generated method stub
		return this.harvestLevel;
	}

	@Override
	public int getEnchantmentValue() {
		// TODO Auto-generated method stub
		return this.enchantability;
	}

	@Override
	public Ingredient getRepairIngredient() {
		// TODO Auto-generated method stub
		return this.repairMaterial;
	}
}

this is the class i use to actually set the values

that's your Tier for the Tools

7 hours ago, diesieben07 said:

Override getAttributeModifiers in your Item class.

you can take a look into the SwordItem as an example