[1.18.2] Change Vanilla Minecraft Blocks that have a Custom Tag to my Custom Block?

[MAKAPKA]

How can I change Vanilla Minecraft Blocks that have a Custom Tag to my Custom Block using Random Ticking? Should I do this with ModFeatures or ModEvents? Differences between Features and Events? I already have ModTags and Custom Tag.

Edited June 29, 2022 by MAKAPKA

[MAKAPKA]

9 minutes ago, diesieben07 said:

Please clarify what you mean by "ModFeatures", "ModEvents", "ModTags" and "Custom Tag".

ModFeatures.class = Custom Features .class in My Own Mod

ModEvents.class = Custom Events .class:

package net.makapka.blacksoilmod.event;

import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.makapka.blacksoilmod.BlackSoilMod;

@Mod.EventBusSubscriber(modid = BlackSoilMod.MOD_ID)
public class ModEvents {

    @SubscribeEvent
    public static void turnToDryGrassBlock(BlockEvent event) {

    }

}

ModTags.class = Custom Tags .class:

package net.makapka.blacksoilmod.util;

import net.makapka.blacksoilmod.BlackSoilMod;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.tags.BlockTags;
import net.minecraft.tags.ItemTags;
import net.minecraft.tags.TagKey;
import net.minecraft.world.item.Item;
import net.minecraft.world.level.block.Block;

public class ModTags {
    public static class Blocks {

        // Custom Tag:
        public static final TagKey<Block> DRY_GRASS_REPLACEABLE = tag("dried_grass_replaceable");

        private static TagKey<Block> tag(String name) {
            return BlockTags.create(new ResourceLocation(BlackSoilMod.MOD_ID, name));
        }

        private static TagKey<Block> forgeTag(String name) {
            return BlockTags.create(new ResourceLocation("forge", name));
        }
    }

    public static class Items {


        private static TagKey<Item> tag(String name) {
            return ItemTags.create(new ResourceLocation(BlackSoilMod.MOD_ID, name));
        }

        private static TagKey<Item> forgeTag(String name) {
            return ItemTags.create(new ResourceLocation("forge", name));
        }
    }
}

dried_grass_replaceable.json :

{
  "replace": false,
  "values": [
    "minecraft:grass_block",
    "minecraft:podzol",
    "minecraft:mycelium"
  ]
}

 

[warjort]

AFAIK, there is no general event for random ticks on any block?

The only thing I can see is forge's CropGrowEvent which only applies to StemBlocks.

[JimiIT92]

A Feature is generally used (or at least in 99% of the cases is what I've used them for) for something that can be "placed" naturally inside the world (like ores, flowers, trees, structures....).
An Event is something that Forge fires when something particular occurs (like an entity being spawned, a block being placed, a message bein sent...).
So in this case what you want to use is an Event that listens for a blocks ticking and then, if some random criteria you decide are met, you can turn it into your own custom block.
Unfortunately, as warjort said...

32 minutes ago, warjort said:

AFAIK, there is no general event for random ticks on any block

So unless it comes out you need to find a "manual" solution to achieve what you want

[MAKAPKA]

1 hour ago, JimiIT92 said:

So unless it comes out you need to find a "manual" solution to achieve what you want

Is it possible to do this inside the Custom Block I'm going to turn the Vanilla Blocks into?

I need to change Vanilla Grass Block to Custom Dried Grass Block, provided it has Lava or Fire next to it.

Maybe it's easier to add a Custom Dried Grass Block to the world generation and make it propagate?

Edited June 29, 2022 by MAKAPKA

[warjort]

47 minutes ago, MAKAPKA said:

Is it possible to do this inside the Custom Block I'm going to turn the Vanilla Blocks into?

How would minecraft know to call code on a block that doesn't exist yet?

[MAKAPKA]

4 minutes ago, warjort said:

How would minecraft know to call code on a block that doesn't exist yet?

You're right! The function I meant is the same with the propagating block.

[warjort]

Spitballing:

An alternate approach (not using random ticks) would be write your own WorldTickEvent handler that randomly changes blocks.

Your world tick handler would iterate over the loaded chunks and choose random blocks in each, applying whatever logic you want.

The issue is how to know the loaded chunks. This would probably involve some book-keeping on your part where you keep track of this yourself using the ChunkEvent.Load/Unload event?

[Syric]

That seems... excessive. Perhaps override the default lava pool feature to include some seed blocks of dry grass, which then spread if they receive a random tick and are near lava? It does a little of what you want, I guess.

A way to override the functions of a vanilla block would instantly solve your problem. This thread suggests outright replacing vanilla blocks with your new block (functionally identical to grass but with a randomtick method that dries it in the right circumstances). I'm leery of messing with vanilla because it seems like a compatibility hazard, but it might be worth investigating.

[warjort]

If you do use that approach, I think you want to further iterate on chunk.getSections() to avoid looking parts of the chunk that are just void/air and are not really there.

[warjort]

9 minutes ago, Syric said:

That seems... excessive. Perhaps override the default lava pool feature to include some seed blocks of dry grass, which then spread if they receive a random tick and are near lava? It does a little of what you want, I guess.

A way to override the functions of a vanilla block would instantly solve your problem. This thread suggests outright replacing vanilla blocks with your new block (functionally identical to grass but with a randomtick method that dries it in the right circumstances). I'm leery of messing with vanilla because it seems like a compatibility hazard, but it might be worth investigating.

Overwriting vanilla blocks can break other mods that have used mixins to do more refined changes to them.

Using mixins is another way to get the behaviour asked for on this thread. But it means it will only work for the blocks that have been modified in advance while the original poster wants to define them dynamically using tags.