I have this event and its supposed to be whenever a player sneak right clicks with a empty glass bottle they take 3 hearts of damage and gives them a vial of blood but it doesn't do anything. Any help appreciated, thanks.

 

Event:

Spoiler

@SubscribeEvent
    public void bloodVialRightClick(LivingEntityUseItemEvent.Start e)
    {
        EntityPlayer player = (EntityPlayer) e.getEntityLiving();
        ItemStack itemUsed = e.getItem();
        
        if(itemUsed == new ItemStack(Items.GLASS_BOTTLE) && player.isSneaking())
        {
            float health = player.getHealth();
            float newHealth = player.getHealth() - 3;
            player.setHealth(newHealth);
            player.inventory.addItemStackToInventory(new ItemStack(ItemRegistry.bloodVial));
        
            itemUsed.shrink(1);
        }
    }

 

Edited March 13, 20178 yr by Blackwing_Forged

this should fix things the LivingEntityUseItemEvent.Start only works for items that can be used i.e. food i wrote the fixed code for you below.

EDIT: just realized you wanted sneak-right-click i fixed the code below

 

	//used when rightclicking while looking at a block
	@SubscribeEvent()
	public void rightClickBlock(PlayerInteractEvent.RightClickBlock e){
		//this checks if the entities world is the server we only run this on the server so it doesn't mess with things
		if(!e.getEntity().getEntityWorld().isRemote){
			EntityPlayer player = e.getEntityPlayer();//the player
			//check if player is sneaking
			if(player.isSneaking()){
				ItemStack heldItem = player.getHeldItemMainhand();//the items in the players hand
				//we compare the Item contained in the ItemStack not the ItemStack itself
				//we use .equals here not == only use == for numbers or booleans
				if(heldItem.getItem().equals(Items.GLASS_BOTTLE)){
					onGlassBottleRightClick(player, heldItem);//this is the method where you put the code when the player right-clicks with an item
				}	
			}
			
		}
	}
	
	//used when rightclicking with an item while not looking at a block
	@SubscribeEvent()
	public void rightClickItem(PlayerInteractEvent.RightClickItem e){
			//this checks if the entities world is the server we only run this on the server so it doesn't mess with things
			if(!e.getEntity().getEntityWorld().isRemote){
				EntityPlayer player = e.getEntityPlayer();//the player
				//check if player is sneaking
				if(player.isSneaking()){
					ItemStack heldItem = player.getHeldItemMainhand();//the items in the players hand
					//we compare the Item contained in the ItemStack not the ItemStack itself
					//we use .equals here not == only use == for numbers or booleans
					if(heldItem.getItem().equals(Items.GLASS_BOTTLE)){
						onGlassBottleRightClick(player, heldItem);//this is the method where you put the code when the player right-clicks with an item
					}	
				}
				
			}
	}
	
	private void onGlassBottleRightClick(EntityPlayer player, ItemStack bottlestack){
		player.attackEntityFrom(DamageSource.GENERIC, 3F);
		//player.inventory.addItemStackToInventory(new ItemStack(ItemRegistry.bloodVial));
	}

 

Edited March 13, 20178 yr by jtsfour
error

Thanks