How to interface with vanilla world generation?

[Jkmcameron]

I've created custom tree "Feature"s and registered them to the forge Feature registry, but I don't know what to do after this. I deally I'd like to override the vanilla trees, or tell the game not to place vanilla trees and to place mine instead. I checked the different available Events provided by forge but I didn't see any that jumped put to me as being related to world generation. If there is no Event to subscribe to for world generation, how would I go about doing this? Forge 1.15

Edited March 15, 2020 by Jkmcameron

[Jkmcameron]

Ok somehow I spent hours looking into this with no progress, but just when I give up and make a thread about it I sort of figure it out. Is the following code viable? 

 

@SubscribeEvent
public void worldGeneration(WorldEvent event)
{
	Collection<Biome> biomes = ForgeRegistries.BIOMES.getValues();

	for (Biome biome : biomes)
	{
	    List<ConfiguredFeature<?, ?>> configuredFeatures = biome.getFeatures(GenerationStage.Decoration.VEGETAL_DECORATION);

	    for (ConfiguredFeature<?, ?> configuredFeature : configuredFeatures)
	    {
		switch (configuredFeature.feature.getRegistryName().getPath())
		{
		    case "normal_tree":
		    case "acacia_tree":
		    case "fancy_tree":
		    case "dark_oak_tree":
		    case "mega_jungle_tree":
		    case "mega_spruce_tree":

			configuredFeatures.remove(configuredFeature);
		}
	    }

	    biome.getFeatures(GenerationStage.Decoration.VEGETAL_DECORATION).clear();

	    for (ConfiguredFeature<?, ?> configuredFeature : configuredFeatures)
	    {
		biome.addFeature(GenerationStage.Decoration.VEGETAL_DECORATION, configuredFeature);
	    }

	    // Add custom trees

	    biome.addFeature(GenerationStage.Decoration.VEGETAL_DECORATION, MY_CUSTOM_FEATURE);
	}
}

I assume this would have the intended effect, but what would be the correct Event to fire this code at? Obviously it has to be done after RegistryEvent.Register<Feature<?>> is called

Edited March 15, 2020 by Jkmcameron

[Jkmcameron]

2 hours ago, Jkmcameron said:

Ok somehow I spent hours looking into this with no progress, but just when I give up and make a thread about it I sort of figure it out. Is the following code viable? 

 

@SubscribeEvent
public void worldGeneration(WorldEvent event)
{
	Collection<Biome> biomes = ForgeRegistries.BIOMES.getValues();

	for (Biome biome : biomes)
	{
	    List<ConfiguredFeature<?, ?>> configuredFeatures = biome.getFeatures(GenerationStage.Decoration.VEGETAL_DECORATION);

	    for (ConfiguredFeature<?, ?> configuredFeature : configuredFeatures)
	    {
		switch (configuredFeature.feature.getRegistryName().getPath())
		{
		    case "normal_tree":
		    case "acacia_tree":
		    case "fancy_tree":
		    case "dark_oak_tree":
		    case "mega_jungle_tree":
		    case "mega_spruce_tree":

			configuredFeatures.remove(configuredFeature);
		}
	    }

	    biome.getFeatures(GenerationStage.Decoration.VEGETAL_DECORATION).clear();

	    for (ConfiguredFeature<?, ?> configuredFeature : configuredFeatures)
	    {
		biome.addFeature(GenerationStage.Decoration.VEGETAL_DECORATION, configuredFeature);
	    }

	    // Add custom trees

	    biome.addFeature(GenerationStage.Decoration.VEGETAL_DECORATION, MY_CUSTOM_FEATURE);
	}
}

I assume this would have the intended effect, but what would be the correct Event to fire this code at? Obviously it has to be done after RegistryEvent.Register<Feature<?>> is called

 

Ok the event was RegistryEvent.Register<Biome> (duh), after dealing with some BS that was preventing RegistryEvent from firing I got it to work, code is good. Not a tree in sight. Close the thread

Edited March 15, 2020 by Jkmcameron