[1.13.2] Is there any way to give a player a status effect when holding an item?

[mmyron]

I have an item that I would like to give the player poison when it is in their main or offhand, and nothing if it is not. Is there any way to achieve this effect?

[mmyron]

21 minutes ago, diesieben07 said:

Override Item#inventoryTick.

Cool, but where would I override this? And how? I set up a class called PoisonIvyLeaf to check if this item is in the hand, but I'm not sure where to implement inventoryTick to check for that. Should I set up a SubscribeEvent?

[mmyron]

10 hours ago, diesieben07 said:

You override this method in the item class for the item you want to have this effect.

here's what I have so far

package item;

import mmyron.mmyronsqol.lists.ItemList;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;

public class ItemPoisonIvyLeaf extends Item{

	public ItemPoisonIvyLeaf(Properties properties) {
		super(properties);
	}
	
	private void onPlayerTick(EntityPlayer player) {
		ItemStack itemInSlot = player.inventory.getStackInSlot(0);
		if(itemInSlot.getItem() == ItemList.poison_ivy_leaf) {
			player.addPotionEffect(new PotionEffect(Potion.getPotionById(19), 5, 0));
		}
	}

}

I feel like this would work, but now I'm clueless as to how to register the item in the registry lol

How would I call this item class in the registry in my main class?

Edited June 3, 2019 by mmyron

[Draco18s]

9 hours ago, diesieben07 said:

Override Item#inventoryTick.

8 hours ago, mmyron said:

private void onPlayerTick(EntityPlayer player)

 

One of these things is not like the other.

[mmyron]

2 hours ago, Draco18s said:

 

One of these things is not like the other.

Right, so I changed that to override inventoryTick (it wasn't showing up correctly for me earlier), and i got this

	@Override
	public void inventoryTick(ItemStack stack, World worldIn, Entity entityIn, int itemSlot, boolean isSelected) {
		
		if(stack.getItem() == ItemList.poison_ivy_leaf && isSelected) {
			
		}
	}

However, I'm unable to use the addPotionEffect, since the entityIn doesn't seem to be a player?

 

EDIT: Figured it out.

Spoiler

@Override
	public void inventoryTick(ItemStack stack, World worldIn, Entity entityIn, int itemSlot, boolean isSelected) {
		
		if(stack.getItem() == ItemList.poison_ivy_leaf && isSelected) {
			if(entityIn instanceof EntityPlayer && !entityIn.has) {
				((EntityPlayer) entityIn).addPotionEffect(new PotionEffect(MobEffects.POISON, 20, 0));
			}
		}
	}

 

 

Edited June 3, 2019 by mmyron