TelepathicGrunt

// FORGE
@Mod(Test.MODID)
public class Test {
    public static final String MODID = "test";

    // A Feature + Config to say how the feature should generate. 
    public static ConfiguredFeature<?, ?> CUSTOM_ORE_CF;
    // A ConfiguredFeature + 0 or more Placement Modifiers that tells the
    // ConfiguredFeature where and how often it should generate in chunks.
    public static PlacedFeature CUSTOM_ORE_PF; 

TelepathicGrunt

// Note: Lithostitch mod allows you to add to template pools easily! No code needed. 
// https://github.com/Apollounknowndev/lithostitched/wiki/Adding-Entries-to-Template-Pools

// This gist code is public domain. Take it! Steal it! AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!!!!!!!!!!!
    // 1.18.2 code at top. 1.16.5 version farther down

    private static final ResourceKey<StructureProcessorList> EMPTY_PROCESSOR_LIST_KEY = ResourceKey.create(
            Registry.PROCESSOR_LIST_REGISTRY, new ResourceLocation("minecraft", "empty"));
    
    public ExampleMod() {

TelepathicGrunt

Forge PRs can be quite tricky to understand and get working but if you can get your new event or hook or fix into Forge, you benefit a ton of modders! Don't let the idea of a Forge PR scare you or seem too daunting! Just follow this gist and hopefully you'll get the hang of it!

The first step is check out gigaherz's gist for creating a PR:
https://gist.github.com/gigaherz/ca256fea517cb925dfc31d7cd48c487e

Forge's doc on making PRs with extra into and styling rules:
https://github.com/MinecraftForge/MinecraftForge/wiki/If-you-want-to-contribute-to-Forge

TelepathicGrunt

When you mixin into a non-static inner class, the inner class has a hidden field that stores the instance of the outer class. It is a bit tricky to get it but it can be done.

Forge:

Step one, go to the Forge jar and find the class in question. Open it in Intellij

https://i.imgur.com/Dnrv3Kv.png

https://i.imgur.com/F1bPHRG.png

TelepathicGrunt

    // Note: Lithostitch mod allows you to add to processor lists easily! No code needed. 
    // https://github.com/Apollounknowndev/lithostitched/wiki/Worldgen-Modifier-Types#add_processor_list_processors

    // This gist code is public domain. Take it! Steal it! AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!!!!!!!!!!!
    
    // 1.18.2+
    public ExampleMod() {
            MinecraftForge.EVENT_BUS.addListener(this::addNewVillageCrop);
    }
    

TelepathicGrunt

What are mixins?

Mixins are a way to inject code or change the minecraft source code directly and should be use with caution. If you can do a PR to Forge or use an event, try those first. If all else fails, then mixins may be a good option to look into. Here are some resources for mixins:

• Mixin Official Docs: https://github.com/SpongePowered/Mixin/wiki
• Mixin Javadocs: https://jenkins.liteloader.com/view/Other/job/Mixin/javadoc/index.html
• Mixin Cheatsheet: https://github.com/2xsaiko/mixin-cheatsheet
• MixinExtras (Adds some powerful compatiable mixin options! See their wiki): https://github.com/LlamaLad7/MixinExtras

Now, I'll be honest, the official mixin doc is kind of terrible to learn from for most people. It's extremely dense and and really only helps people who already knows in-depth bytecode and stuff. But most modders aren't like that and just wants to do small stuff lol. But I'll give you the run-down here. There's a few kinds of mixins that you will encounter quite often.

TelepathicGrunt

Gson gson = new GsonBuilder().setPrettyPrinting().create();

// Will print the stuff into the runs/config folder
try {
      for(Map.Entry<RegistryKey<StructureProcessorList>, StructureProcessorList> processorListEntry : BuiltinRegistries.STRUCTURE_PROCESSOR_LIST.getEntries()){
           
           if(!processorListEntry.getKey().getValue().getNamespace().equals(RepurposedStructures.MODID)) continue;
           for(StructureProcessor processorEntry : processorListEntry.getValue().getList()) {

                    String filePath = FabricLoader.getInstance().getConfigDir()+"\\processor_list\\"+processorListEntry.getKey().getValue().getPath()+".json";

TelepathicGrunt

public class StackedBubbleRoomsCarver extends CaveWorldCarver
{

	public StackedBubbleRoomsCarver(Function<Dynamic<?>, ? extends ProbabilityConfig> deserialize)
	{
		super(deserialize, 256); // The 256 is the maximum height that this carver can cave to
	}