I know a lot of people have posted about this topic, but I can not find a forum to support my needs. Keep in mind that I do not have much Java skills, so please explain things as much as possible.

 

I want to add a custom block drop to oak leaves (an acorn). After a couple hours of work, I've ended up with this:

package com.github.n_slash_a.terracraftia;

import net.minecraft.item.ItemStack;
import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;

import static com.github.n_slash_a.terracraftia.init.ModItems.ACORN;
import static net.minecraft.block.Blocks.*;

@Mod.EventBusSubscriber
public class LeavesDropEvent {
    @SubscribeEvent
    public void HarvestDropsEvent(BlockEvent.HarvestDropsEvent event) {
        if ((event.getState().getBlock() == OAK_LEAVES)) {
            event.getDrops().clear();
            event.getDrops().add(new ItemStack(ACORN, 1));
        }
    }
}

However, while testing, I encountered a problem: Blocks do not drop anything at all! Is this a problem with forge, or something with my mod?

 

Any advice is appreciated. Thanks!

Edited October 8, 20195 yr by SimplyCmd
Updating Title

20 minutes ago, SimplyCmd said:

Is this a problem with forge, or something with my mod?

HarvestDropeEvent is not implemented yet because of design reasons you can just create a loot table json and override the vanilla one. If you just want to add to the vanilla one use the LootTableLoadEvent.

7 minutes ago, Animefan8888 said:

you can just create a loot table json and override the vanilla one.

Thanks! I will look into it.

How would I go about doing this? I cannot find any resources about modifying vanilla block loot tables on the web.

Step 1: create a new loot table json for the block you want to modify (and named with the name of the block).

Step 2: if you want to override completely, place this file in data/minecraft/loot_tables/blocks. If you want to add to, place it in data/<modid>/loot_tables/blocks

Step 3: if you want to override completely, you're done. Otherwise, subscribe to the LootTableLoadEvent:

@SubscribeEvent
public static void onLootLoad(LootTableLoadEvent event) {
    if (event.getName().equals(new ResourceLocation("minecraft",the_block_to_modify))) {
       event.getTable().addPool(LootPool.builder().addEntry(TableLootEntry.builder(new ResourceLocation(modid,filename))).build());
    }
}

 

 

it does not work when I open a box there is not my item in side

 

simple_dungeon.json

{
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": {
        "min": 1,
        "max": 9
      },
      "bonus_rolls": {
        "min": 0,
        "max": 2
      },
      "entries": [
        {
          "type": "item",
          "name": "element:magicessence",
          "weight": 50,
          "functions": [
            {
              "function": "set_data",
              "data": 0
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 3
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.301
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:darkessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 1
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.331
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:electrikessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 2
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.332
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:fireessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 3
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.33399999999999996
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:iceessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 4
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.335
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:lifeessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 5
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.335
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:poisonessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 6
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.335
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:wateressense",
          "weight": 40,
          "functions": [
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.335
                }
              ]
            }
          ]
        },
        {
          "type": "item",
          "name": "element:windessense",
          "weight": 40,
          "functions": [
            {
              "function": "set_data",
              "data": 0
            },
            {
              "function": "set_count",
              "count": {
                "min": 1,
                "max": 5
              },
              "conditions": [
                {
                  "condition": "random_chance",
                  "chance": 0.335
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

 

Edited October 8, 20195 yr by DevTech

6 hours ago, Draco18s said:

Step 1: create a new loot table json for the block you want to modify (and named with the name of the block).

Step 2: if you want to override completely, place this file in data/minecraft/loot_tables/blocks. If you want to add to, place it in data/<modid>/loot_tables/blocks

Step 3: if you want to override completely, you're done. Otherwise, subscribe to the LootTableLoadEvent:

@SubscribeEvent
public static void onLootLoad(LootTableLoadEvent event) {
    if (event.getName().equals(new ResourceLocation("minecraft",the_block_to_modify))) {
       event.getTable().addPool(LootPool.builder().addEntry(TableLootEntry.builder(new ResourceLocation(modid,filename))).build());
    }
}

 

Thank you so much!

On 10/8/2019 at 7:33 AM, Draco18s said:

Step 1: create a new loot table json for the block you want to modify (and named with the name of the block).

Step 2: if you want to override completely, place this file in data/minecraft/loot_tables/blocks. If you want to add to, place it in data/<modid>/loot_tables/blocks

Step 3: if you want to override completely, you're done. Otherwise, subscribe to the LootTableLoadEvent:

@SubscribeEvent
public static void onLootLoad(LootTableLoadEvent event) {
    if (event.getName().equals(new ResourceLocation("minecraft",the_block_to_modify))) {
       event.getTable().addPool(LootPool.builder().addEntry(TableLootEntry.builder(new ResourceLocation(modid,filename))).build());
    }
}

 

So If i'm trying to change desert_pyramid chest loot, what do I call my loot table json? Would it be desert_pyramid_chest.json? Also, what would i put in "the block to modify" and "filename" above?

Dear lord this topic is woefully out of date.

 

To modify loot tables, use GlobalLootModifiers

https://mcforge.readthedocs.io/en/1.15.x/items/globallootmodifiers/

Draco18s

Do you know the new way to get mod items to drop from vanilla leaves?

Im modding in green_apples and I would like them to drop from oak leaves I took the vanilla oak_leaves.json and added my green_apples in there and place it in modid, loot_tables, blocks

Thanks