How to modify vanilla block drops in 1.12.2?

[Jiro7]

I've been searching about this but all the answers seem to be outdated. I want to change the drops of vanilla blocks. For example, I want Iron Ores to drop a custom item I made instead of the block itself. I also want to change the amount of lapis dropped.

 

I tried handling the BlockEvent.HarvestDropsEvent event, however it doesn't seem to have any method to change the drops nor drop amounts, just to change the drop chances. Any help?

[V0idWa1k3r]

6 minutes ago, Jiro7 said:

it doesn't seem to have any method to change the drops nor drop amounts

This is not true. BlockEvent.HarvestDropsEvent has a List<ItemStack> that contains all drops. You can access the list with HarvestDropsEvent#getDrops. You can then modify the list's contents as you want.

[Jiro7]

13 minutes ago, V0idWa1k3r said:

This is not true. BlockEvent.HarvestDropsEvent has a List<ItemStack> that contains all drops. You can access the list with HarvestDropsEvent#getDrops. You can then modify the list's contents as you want.

Thanks, I managed to make it drop an item. However, there is only one value for drop chances, how can I give each drop on the list its own probability?

So for example I want it to drop between 1-3 iron nuggets and a 10% chance to drop an iron ingot. Is it possible?

[V0idWa1k3r]

8 minutes ago, Jiro7 said:

I want it to drop between 1-3 iron nuggets and a 10% chance to drop an iron ingot. Is it possible?

Have your random chance happen in the event. Add a new ItemStack to the list that is your nuggets with a count of 1 - 3 based on random number, then check against a random value and if it is within the range you want add an Iron ingot.

drops.add(new ItemStack(Items.IRON_NUGGET, 1 + rand.nextInt(2), 0));
if (rand.nextFloat() <= 0.1F)
{
	drops.add(new ItemStack(Items.IRON_INGOT, 1, 0));
}

 

[Jiro7]

24 minutes ago, V0idWa1k3r said:

Have your random chance happen in the event. Add a new ItemStack to the list that is your nuggets with a count of 1 - 3 based on random number, then check against a random value and if it is within the range you want add an Iron ingot.

drops.add(new ItemStack(Items.IRON_NUGGET, 1 + rand.nextInt(2), 0));
if (rand.nextFloat() <= 0.1F)
{
	drops.add(new ItemStack(Items.IRON_INGOT, 1, 0));
}

 

Oh, that was simpler than I thought, thank you.

[Tameet]

On 10/23/2018 at 11:13 PM, V0idWa1k3r said:

Have your random chance happen in the event. Add a new ItemStack to the list that is your nuggets with a count of 1 - 3 based on random number, then check against a random value and if it is within the range you want add an Iron ingot.

drops.add(new ItemStack(Items.IRON_NUGGET, 1 + rand.nextInt(2), 0));
if (rand.nextFloat() <= 0.1F)
{
	drops.add(new ItemStack(Items.IRON_INGOT, 1, 0));
}

 

Where in mod main class should be this function?

[V0idWa1k3r]

Don't hijack old threads, make your own.

This wouldn't be in the main mod class, it would be in the event handler.

[Spence1400]

How does the mod know that this function is for Iron Ore? I new to Minecraft modding.