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HarvestDropsEvent not working as expected.


Andrew Murdza
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I'm making a mod for 1.14.4 which affects the drops of blocks depending on the biome at the location where they were harvested. I think that the best way to do this is with the HarvestDropsEvent. The problem is that my HarvestDropEvent method does not get called when I mine a sand block with a diamond shovel in survival on a test world. I could use the OnBlockBreakEvent method (which does get called under the same situation) but I only want the additional drops to be added if the conditions of the harvest drops event are satisfied and the tool is not a silk-touch tool. Note that I have strange code inside of both methods because I first want to make sure I get the onEvent method to fire and then I will replace the inside code with things relevant to my mod.

 

Please tell if there is a way to get the onEvent method to be called when I harvest blocks like wheat, melons, ores, etc.

 

My code is below:

 

 
 
 
 
Spoiler

package com.amurdza.aoemod.blocks;

import java.util.List;
import java.util.logging.*;

import com.amurdza.aoemod.LoggerClass;

import net.minecraft.block.Block;
import net.minecraft.block.Blocks;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Items;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.event.world.BlockEvent.HarvestDropsEvent;
import net.minecraftforge.eventbus.api.EventPriority;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod.EventBusSubscriber;

@EventBusSubscriber
public class BlockEventHandler {

    private static final Logger logger=LoggerClass.logSetup();
    @SubscribeEvent
    public static void OnBlockBreakEvent(BlockEvent.BreakEvent event) {
        Block block=event.getState().getBlock();
        logger.info("this ran");
        World worldIn=event.getWorld().getWorld();
        BlockPos pos=event.getPos();
        PlayerEntity player=event.getPlayer();
        
        Item activeItem=player.getHeldItemMainhand().getItem();
        //if(activeItem.canHarvestBlock(event.getState())) {
            logger.info("this ran 1");
            if(!activeItem.equals(Items.SHEARS)) {
                logger.info("this ran 2");
                if(!player.isCreative()) {
                    logger.info("this ran 3");
                    
                }
            }
        //}
        
        Block.spawnAsEntity(worldIn, pos, new ItemStack(Items.GOLD_INGOT,4));        
        if(block.equals(Blocks.JUNGLE_LEAVES)) {
            logger.info("this ran 2");
            World worldIn1=event.getWorld().getWorld();
            BlockPos pos1=event.getPos();
            Block.spawnAsEntity(worldIn1, pos1, new ItemStack(Items.JUNGLE_SAPLING,4));
        }
    }
    
    
    @SubscribeEvent(priority=EventPriority.NORMAL, receiveCanceled=true)
    public static void onEvent(HarvestDropsEvent event) {
        List<ItemStack> drops=event.getDrops();
        logger.info("this ran");
        if(drops.contains(new ItemStack(Items.SAND,1))) {
            logger.info("this ran 2");
            World worldIn=event.getWorld().getWorld();
            BlockPos pos=event.getPos();
            Block.spawnAsEntity(worldIn, pos, new ItemStack(Items.GOLD_INGOT,4));        
        }
    }
}

 

Thanks, Andrew Murdza

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5 hours ago, Andrew Murdza said:

@EventBusSubscriber

You need to provide the bus in the annotation. It needs to be Bus.FORGE I believe.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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2 hours ago, Animefan8888 said:

You need to provide the bus in the annotation. It needs to be Bus.FORGE I believe.

Bus.FORGE is the default, so it doesn't need to be specified manually.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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10 minutes ago, Choonster said:

Bus.FORGE is the default, so it doesn't need to be specified manually.

Right.

 

8 hours ago, Andrew Murdza said:

logger.info("this ran");

Does this log statement run?

 

8 hours ago, Andrew Murdza said:

 if(drops.contains(new ItemStack(Items.SAND,1))) {

This is probably your problem. Your asking if a new instance of ItemStack is in the drops list. That doesn't work.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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The log statements in OnBlockBreak all run, while the log statement in the HarvestDropsEvent does not. This means that the if statement is not reached.

 

How could I change the if statement so that it would work? (This is something I would have to deal with after I get the HarvestDropsEvent to fire)

 

Thanks, Andrew Murdza

 

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  • 5 months later...

I'm using the latest Forge MDK for 1.15.2 and the HarvestDropsEvent event sill isn't being fired. Other types of BlockEvent are fired. I used Eclipse to search for references, and found that while there IS a method that posts the HarvestDropsEvent, that method is never called. Basically the event is never fired unless fired by a mod. I think this is a bug.

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And modifications to such are still being worked on.

https://github.com/MinecraftForge/MinecraftForge/pull/6401

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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  • 1 month later...

I am now making a mod for 1.15 I would like to know when the event comes to forge 1.15. I went to the link Draco18s provided and it seems that there is no project or milestone. I subscribed to that github thread, but I was wondering if anyone has a time estimate for the number of months before it gets added.

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image.png.5054d07afbb8a71a013f93df8d300062.png

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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