I've made a LivingHurtEvent that checks if the player is under a certain health threshold, and then checks if they have a specific undamaged item. The Event will then damage the item and heal the player. The damaged item uses OnUpdate to recover durability over time, simulating a cooldown effect.

Problem is: it seems that the item is destroyed even if hasn't taken enough damage. 

Event Code

	@SubscribeEvent

	public void DevilContract(LivingHurtEvent e) {

		if (e.getEntityLiving() instanceof EntityPlayer) {

			EntityPlayer victim = (EntityPlayer) e.getEntityLiving();
			ISouls Souls = victim.getCapability(SoulsProvider.Souls_CAP, null);
			ItemStack stack = ItemStack.EMPTY;
			if (victim.getHealth() <= (victim.getMaxHealth() * .50)) {

				if (victim.inventory.hasItemStack(new ItemStack(ModItems.DemonShield)) && Souls.getSouls() >= 100) {

					for (int i = 0; i < victim.inventory.getSizeInventory(); i++) {
						if (victim.inventory.getStackInSlot(i).getItem().equals(ModItems.DemonShield)) {

							stack = victim.inventory.getStackInSlot(i);
							if (stack.isItemDamaged()) {

							} else if (!stack.isItemDamaged()) {

								victim.heal(victim.getMaxHealth());

								victim.addPotionEffect(new PotionEffect(MobEffects.RESISTANCE, 50, 5));
								victim.addPotionEffect(new PotionEffect(MobEffects.ABSORPTION, 50, 5));

								Souls.consume(100);

								stack.damageItem(stack.getMaxDamage() - 1, victim);

								System.out.println("Item Damage: " + stack.getItemDamage());
							}

							else {

							}
						}
					}

				}
			}

		}
	}

Item Code

 

package com.javisel.items;

import java.util.List;
import java.util.Random;

import javax.annotation.Nullable;

import com.javisel.resourcesystems.KaliModeProvider;
import com.javisel.resourcesystems.PTKProvider;
import com.javisel.resourcesystems.SoulsProvider;

import net.minecraft.client.Minecraft;
import net.minecraft.client.util.ITooltipFlag;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.monster.EntityMob;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.IItemPropertyGetter;
import net.minecraft.item.ItemElytra;
import net.minecraft.item.ItemStack;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class DemonShield extends ItemBase {

	public DemonShield(String name) {
		super(name);
		this.setMaxStackSize(1);
		this.setMaxDamage(168000);
	
		// TODO Auto-generated constructor stub
	}

	
	   @SideOnly(Side.CLIENT)
	    public void addInformation(ItemStack stack, @Nullable World worldIn, List<String> tooltip, ITooltipFlag flagIn)
	    {
			EntityPlayer p = Minecraft.getMinecraft().player;

		   tooltip.add("PASSIVE: Devil's Contract");
		   tooltip.add("Type: Stim");
		   tooltip.add("If you fall bellow 30% Health, you heal to full, gain resistance, absorption. 140 Minute Cooldown");
		   tooltip.add("Cost: 100 Souls");

		   if (stack.getItemDamage()!=0) {
		   tooltip.add("Cooldown: " + ((stack.getItemDamage())/20)+"s");

		   }
		   
		   else {
			   tooltip.add("Cooldown: Ready");

		   }
		   if (p!=null) {
			   
				tooltip.add("Souls: " + p.getCapability(SoulsProvider.Souls_CAP, null).getSouls());
		   }
		  
		   
	    }
	   

		@Override
		public void onUpdate(ItemStack stack, World worldIn, Entity entityIn, int itemSlot, boolean isSelected) {
			if (stack.getItemDamage() != 0) {
				
				stack.setItemDamage(stack.getItemDamage()-1);
			}
		


			}
}

 

9 minutes ago, Javisel said:

Problem is: it seems that the item is destroyed even if hasn't taken enough damage. 

Try stepping through your code in the debugger of your IDE it will show you exactly what is going on.

1 hour ago, Animefan8888 said:

Try stepping through your code in the debugger of your IDE it will show you exactly what is going on.

I'm stepping through the debugger and can't figure out what's wrong. If i set the MaxDamage to a lower value (100) it works fine. But a value like 168000 breaks it.

4 minutes ago, Javisel said:

I'm stepping through the debugger and can't figure out what's wrong. If i set the MaxDamage to a lower value (100) it works fine. But a value like 168000 breaks it.

That number is too big actually. There is a max amount the max damage can be which is like a short, I'm not quite sure.

Edited August 6, 20187 yr by Animefan8888

2 hours ago, Animefan8888 said:

That number is too big actually. There is a max amount the max damage can be which is like a short, I'm not quite sure.

it’s a signed small int (values between -(2^15) and (2^15)-1)

it’s a 2 byte value

Just now, Cadiboo said:

it’s a signed small int (values between -(2^15) and (2^15)-1)

it’s a 2 byte value

So between −32,768 and 32,767

2 minutes ago, Cadiboo said:

it’s a signed small int (values between -(2^15) and (2^15)-1)

it’s a 2 byte value

Yes that is what I had written before. But then I edited it because I remembered it was saved as a short value and read as a short value because that is the closest thing to its size.

1 minute ago, Animefan8888 said:

Yes that is what I had written before. But then I edited it because I remembered it was saved as a short value and read as a short value because that is the closest thing to its size.

I don’t understand the difference (or what a short is I assume it’s a java number), I’ll look it up

1 minute ago, Cadiboo said:

I don’t understand the difference (or what a short is I assume it’s a java number), I’ll look it up

It's a two byte number.

1 minute ago, Animefan8888 said:

It's a two byte number.

Yep, worked with every primitive except them TIL