World Gen Help

[RoyalReject]

I was wondering if there were any good pages on how to set up custom world types and everything because i couldn't find anything in the docs on it.

[Cadiboo]

Do you mean custom dimensions?

[Laike_Endaril]

I haven't touched world gen at all yet (though I plan to eventually for 2 of my mod ideas) but one way is to see how others are doing it by looking at existing mods with released source code.  Usually if I take this approach, I search curseforge for a mod that seems similar to what I want to try, then go to the mod page and see if it has the "source" tab.

 

Here's curseforge's mods with the "worldgen" tag: https://minecraft.curseforge.com/mc-mods/world-gen

You can also select a more specific worldgen tag on the left on that page, such as "dimensions", "biomes" or "structures".

 

And here is one that adds a dimension, and has source available (fairly recent source too, which is good).  Disclaimer: I have no experience with the mod itself, I just found it in a quick search is all:

https://github.com/Darkhax-Minecraft/Hunting-Dimension

 

Beyond that I'd say maybe start looking through some of these classes:

DimensionType

WorldProvider (and its subclasses: WorldProviderSurface, WorldProviderHell, and WorldProviderEnd)

 

I'm sure there are some other good classes to look at, but again I haven't actually done any world gen...yet.

[Cadiboo]

You should also check our Jabelar’s tutorials, their very comprehensive

[Daeruin]

https://wiki.mcjty.eu/modding/index.php?title=Dimensions-1.12

http://jabelarminecraft.blogspot.com/p/minecraft-forge-1721710-biome-quick-tips.html

 

[TheCatMorris]

The basics aren't that hard.  The world type class itself looks like this:

 

package your.mod.generation;

import javax.annotation.Nonnull;

import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeProvider;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.ChunkGeneratorOverworld;
import net.minecraft.world.gen.IChunkGenerator;

public class YourWorldType extends WorldType {
    private static BiomeProvider biomeProvider;
    public static IChunkProvider chunkProvider;

	public YourWorldType() {
		super("name of your world type");		
	}

    public IChunkGenerator getChunkGenerator(World world, String generatorOptions) { 
        return new ChunkGeneratorOverworld(world, world.getSeed(), 
        		world.getWorldInfo().isMapFeaturesEnabled(), generatorOptions);
    }

    @Override @Nonnull
    public BiomeProvider getBiomeProvider(@Nonnull World world) { 
        //return a copy of your biome provider (could even be from vanilla)
    }


}

 

 

Your main mod class should have an instance of the type, and preinit should have a line that initializes it.

 

What you actually do with it, from there (biomes, biome / chunk providers, etc.) is up to you, and could be simple or very complicated.

 

This is to create a new type and add it as an option to the start menus for starting a new world (the name should be unlocalized, keyed to lang files).

 

If you want to create a dimension with its own world type I would recommend the "Up To Date Minecraft Modding" Youtube series by Harry Talks.

Edited November 19, 2018 by TheCatMorris