[1.12.2] Only drop when killed by a certain weapon.

[FrostBytes]

To be more specific:

I have a chance for a item to drop when killed normally. However, it's ridiculously small, so it basically means you'd have to be really lucky to get the drop.

However, there's an item in my mod, that lets you significantly increase the chances of this item being dropped. How would I do that?

[FrostBytes]

  On 3/7/2019 at 12:21 PM, diesieben07 said:

DamageSource#getTrueSource will give you the entity causing the damage, if there is any. You can then check if it's a living entity (instanceof EntityLivingBase) and if so use EntityLivingBase#getHeldItemMainhand to get the held item. Check if that item is yours and if so, increase the drop chance.

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How would I "increase the drop chance?"

Currently I have no loot tables or any of the sort set up. Would it just be spawning the item entity?

[DavidM]

The easiest way would be to create an event handler for LivingDropsEvent, and detect the item held in the player's hand. If all conditions match, spawn the drop(s) at the position of the event (the position of the EntityLiving that was killed).

 

What you are trying to create sounds very similar to Draconic Evolution's mob soul system.

You might want to check out Brandon's code for it here.

Edited March 7, 2019 by DavidM

[FrostBytes]

  On 3/7/2019 at 12:39 PM, diesieben07 said:

No. How are you currently creating your drop?

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I’m not. I was just asking in case I started to do something and then someone presented a solution for something else.

  On 3/7/2019 at 12:46 PM, DavidM said:

The easiest way would be to create an event handler for LivingDropsEvent, and detect the item held in the player's hand. If all conditions match, spawn the drop(s) at the position of the event (the position of the EntityLiving that was killed).

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I’ll try that when I can.

[Meldexun]

  On 3/7/2019 at 12:21 PM, diesieben07 said:

DamageSource#getTrueSource will give you the entity causing the damage

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I would just use DamageSource#getImmediateSource(). Because otherwise when you shot an arrow with your bow and swap to the item that increases the drop chance. You would get the increased drop chance without using the item.