How does one add items to vanilla mob loot tables with global loot modifiers? I already managed to make it work with blocks, but mobs don't seem to work.

Here's my code:

LootAdditionModifier:

public class LootAdditionModifier extends LootModifier {
	private final Item addition;

    protected LootAdditionModifier(ILootCondition[] conditionsIn, Item addition) {
        super(conditionsIn);
        this.addition = addition;
    }

    @Nonnull
    @Override
    protected List<ItemStack> doApply(List<ItemStack> generatedLoot, LootContext context) {
        // generatedLoot is the loot that would be dropped, if we wouldn't add or replace
        // anything!
        generatedLoot.add(new ItemStack(addition, 1));
        return generatedLoot;
    }

    public static class Serializer extends GlobalLootModifierSerializer<LootAdditionModifier> {

        @Override
        public LootAdditionModifier read(ResourceLocation name, JsonObject object, ILootCondition[] conditionsIn) {
            Item addition = ForgeRegistries.ITEMS.getValue(
                    new ResourceLocation(JSONUtils.getString(object, "addition")));
            return new LootAdditionModifier(conditionsIn, addition);
        }

        @Override
        public JsonObject write(LootAdditionModifier instance) {
            JsonObject json = makeConditions(instance.conditions);
            json.addProperty("addition", ForgeRegistries.ITEMS.getKey(instance.addition).toString());
            return json;
        }
    }
}

LootStructureAdditionModifier:

public class LootStructureAdditionModifier extends LootModifier{
	 private final Item addition;

	    protected LootStructureAdditionModifier(ILootCondition[] conditionsIn, Item addition) {
	        super(conditionsIn);
	        this.addition = addition;
	    }

	    @Nonnull
	    @Override
	    protected List<ItemStack> doApply(List<ItemStack> generatedLoot, LootContext context) {
	        // generatedLoot is the loot that would be dropped, if we wouldn't add or replace
	        // anything!
	        if(context.getRandom().nextFloat() > 1.0) {
	            generatedLoot.add(new ItemStack(addition, 1));
	        }
	        return generatedLoot;
	    }

	    public static class Serializer extends GlobalLootModifierSerializer<LootStructureAdditionModifier> {

	        @Override
	        public LootStructureAdditionModifier read(ResourceLocation name, JsonObject object, ILootCondition[] conditionsIn) {
	            Item addition = ForgeRegistries.ITEMS.getValue(
	                    new ResourceLocation(JSONUtils.getString(object, "addition")));
	            return new LootStructureAdditionModifier(conditionsIn, addition);
	        }

	        @Override
	        public JsonObject write(LootStructureAdditionModifier instance) {
	            JsonObject json = makeConditions(instance.conditions);
	            json.addProperty("addition", ForgeRegistries.ITEMS.getKey(instance.addition).toString());
	            return json;
	        }
	    }
	}

The global_loot_modifiers.json:

{
  "replace": false,
  "entries": [
    "mikesfancycontent:test"
  ]
}

And the test.json:

{
  "conditions": [
    {
      "condition": "minecraft:entity_properties",
      "entity": "this",
      "predicate": {
        "type": "minecraft:stray"
      }
    }
  ],
  "addition": "mikesfancycontent:frost_berries"
}

What do I have to change to make it work for mob drops. Thanks in advance.

this is not possible with GlobalLootModifiers, you can replace the LootTable of the Entity via a Datapack overwrite
wrong information, ignore this post please

Edited March 28, 20223 yr by Luis_ST

4 hours ago, ChonkoTheGreat said:

mikesfancycontent:test

This is not the registry name of your loot modifier serializser(s) is it?

Edited March 28, 20223 yr by Draco18s

3 hours ago, diesieben07 said:

What are you talking about?

just replacing the vanilla lootTable file via a Datapack, i mean data/minecraft/loot_tables/entities/entity_loot_table.json

They sure do, I made sure of it.
Kinda surprised it isn't part of the test mod that went along with it in the Forge repo source, but whatever.

I wrote it and tested it. So I know it works.