[1.19.4] Registering a LootItemFunction / LootItemFunctionType?

[Draco18s]

I have a custom loot function that I want to have run when my own loot tables for my own blocks runs (it sets the number of drops based on a blockstate value).

Things that did not work:

• Using Forge registries
  • Forge does not provide a replacement for BuiltInRegistries.LOOT_FUNCTION_TYPE
  • Forge also does not appear to need or provide a replacement for BuiltInRegistries.LOOT_CONDITION

    • CanToolPerformAction just creates a new LootItemConditionType and runs with it, no registration needed

• Using an existing LootItemFunctionType in LootItemFunctionType getType()
  • De/serializer attempts to cast my function to an unrelated function
• Using a new LootItemFunctionType()
  • De/serializer gets a null serializer to serialize with

    • Cannot invoke "net.minecraft.resources.ResourceLocation.toString()" because the return value of "net.minecraft.core.Registry.getKey(Object)" is null

• Attempting to make the same calls LootFunctions.register does
  • Fail with fml.modloading.failedtoloadmod
• Attempting to make the same calls as LootFunctions.register at different points during the init/setup process (tried numerous events)
  • Most fail with an Optional.get() returning no value (in this case, trying to get the built in registry's ResourceKey as a ResourceKey<E> not a ResourceKey<? extends Registry<E>>)
  • Others fail with fml.modloading.failedtoloadmod

Things I will not do, but which would probably work:

• Individually test against 16 different values and individually compute the resulting fixed value count
  • This is so dumb I'm not even going to pretend that I should consider it

Edited June 20, 2023 by Draco18s

[Draco18s]

Solved

public static final DeferredRegister<LootItemFunctionType> FUNCS = 
  DeferredRegister.create(Registries.LOOT_FUNCTION_TYPE, MODID);

I hadn't been able to find Registries.LOOT_FUNCTION_TYPE

 

Edited June 20, 2023 by Draco18s