For anyone who is stuck on ore generation, this is what I've come up with. It works, of course everything is already filled in, the variable effecting the ore spawning is at the top. 

 

Feel free to use code, just make sure you use your blocks instead of mine.

package com.ianite.main.world;

import com.ianite.main.block.IaniteBlocks;

import net.minecraft.world.biome.Biome;
import net.minecraft.world.biome.Biomes;
import net.minecraft.world.gen.GenerationStage;
import net.minecraft.world.gen.feature.Feature;
import net.minecraft.world.gen.feature.OreFeatureConfig;
import net.minecraft.world.gen.placement.CountRangeConfig;
import net.minecraft.world.gen.placement.Placement;
import net.minecraftforge.common.BiomeManager;

public class IaniteOreGeneration {
    private static final CountRangeConfig IANITE = new CountRangeConfig(15, 10, 0, 25);
    private static final int IANITE_VEINSIZE = 5;
    private static final CountRangeConfig TRITANIUM = new CountRangeConfig(25, 10, 0, 128);
    private static final int TRITANIUM_VEINSIZE = 8;

    public static void setupOreGeneration() {
        for (BiomeManager.BiomeType btype : BiomeManager.BiomeType.values()) {
                for (BiomeManager.BiomeEntry biomeEntry : BiomeManager.getBiomes(btype)) {
                    if (IaniteOreConfig.enableIaniteOre) {
                        biomeEntry.biome.addFeature(GenerationStage.Decoration.UNDERGROUND_ORES, Biome.createDecoratedFeature(Feature.ORE, new OreFeatureConfig(OreFeatureConfig.FillerBlockType.NATURAL_STONE, 
                        		IaniteBlocks.ianite_ore.getDefaultState(), IANITE_VEINSIZE), Placement.COUNT_RANGE, IANITE));
                    }
                }
        }
    }

    public static void setupNetherOreGeneration() {
        if (IaniteOreConfig.enableTritaniumOre) {
            Biomes.NETHER.addFeature(GenerationStage.Decoration.UNDERGROUND_ORES, Biome.createDecoratedFeature(Feature.ORE, new OreFeatureConfig(OreFeatureConfig.FillerBlockType.NETHERRACK, 
            		IaniteBlocks.tritanium_ore.getDefaultState(), TRITANIUM_VEINSIZE), Placement.COUNT_RANGE, TRITANIUM));
        }
    }
}

 

Edited July 14, 20196 yr by ianm1647
fixed

The wonder of open source code is that you can freely copy and modify it, though I will note that most licenses, like my LGPL-3.0 licensed code, do require attribution. The problem of open source code is that you can freely copy and implement other people's mistakes.

 

The above code is incorrect, and will only generate ore in vanilla biomes, as I finally figured out after bug reports from users. Iterate over the Forge biome register, NOT the vanilla BiomeManager.

 

For example, if you have an ore that should generate in all overworld-type biomes, code like this works:

 

public class OreGeneration
{
    // Vein/Chunk Count, MinHeight, MaxHeightBase, MaxHeight
    private static final CountRangeConfig copper_cfg = new CountRangeConfig(15, 40, 0, 128);
    private static final int copper_veinsize = 7;

	public static void setupOreGen()
    {
    	for (Biome biome: ForgeRegistries.BIOMES.getValues())
        {
            // we have no End or Nether ores, so skip those.
            if (  biome.getCategory() == Biome.Category.THEEND || biome.getCategory() == Biome.Category.NETHER)
            {
                continue;
            }
            
            // Overworld-type Ore generation
            if (SimpleOresConfig.enableCopperOre)
            {
                biome.addFeature(
                        GenerationStage.Decoration.UNDERGROUND_ORES,
                        Biome.createDecoratedFeature(Feature.ORE,
                                                     new OreFeatureConfig(
                                                             OreFeatureConfig.FillerBlockType.NATURAL_STONE,
                                                             ModBlocks.copper_ore.getDefaultState(),
                                                             copper_veinsize),
                                                     Placement.COUNT_RANGE,
                                                     copper_cfg));
        	} // end if copper_ore
		} // end for biomes
	} // end setupOreGen()
} // end class

 

This is, of course, a very stripped-down example. The full mod is here, for those that want to study the code: https://github.com/Sinhika/SimpleOres2

Edited July 20, 20196 yr by Sinhika

You Sir and Sir, are a geniuses. I've been trying to get this to work for hours now, and it does indeed work now ❤️

Guys, have you an idea of remplace Natural_stone by other block ? like custom block ?

1 hour ago, fanor said:

Guys, have you an idea of remplace Natural_stone by other block ? like custom block ?

Currently, you need to create your own Feature implementation that does the same thing as OreFeature but can be configured to replace your desired block.

 

If/when this pull request is merged, all you'll need to do is create a new FillerBlockType that matches the block you want to replace.