Class Ores

src/main/java/com/example/tutorialv3/worldgen/ores/Ores.java:21–83

import net.minecraftforge.event.world.BiomeLoadingEvent;

public class Ores {

    public static final RuleTest IN_ENDSTONE = new TagMatchTest(Tags.Blocks.END_STONES);

    public static Holder<PlacedFeature> MYSTERIOUS_OREGEN;
    public static Holder<PlacedFeature> OVERWORLD_OREGEN;
    public static Holder<PlacedFeature> DEEPSLATE_OREGEN;
    public static Holder<PlacedFeature> NETHER_OREGEN;
    public static Holder<PlacedFeature> END_OREGEN;

    public static void registerConfiguredFeatures() {
        OreConfiguration mysteriousConfig = new OreConfiguration(OreFeatures.STONE_ORE_REPLACEABLES, Registration.MYSTERIOUS_ORE_OVERWORLD.get().defaultBlockState(), OresConfig.MYSTERIOUS_VEINSIZE.get());
        MYSTERIOUS_OREGEN = registerPlacedFeature("mysterious_mysterious_ore", new ConfiguredFeature<>(Feature.ORE, mysteriousConfig),
                CountPlacement.of(OresConfig.MYSTERIOUS_AMOUNT.get()),
                InSquarePlacement.spread(),
                new DimensionBiomeFilter(key -> key.equals(Dimensions.MYSTERIOUS)),
                HeightRangePlacement.uniform(VerticalAnchor.absolute(0), VerticalAnchor.absolute(90)));

        OreConfiguration overworldConfig = new OreConfiguration(OreFeatures.STONE_ORE_REPLACEABLES, Registration.MYSTERIOUS_ORE_OVERWORLD.get().defaultBlockState(), OresConfig.OVERWORLD_VEINSIZE.get());
        OVERWORLD_OREGEN = registerPlacedFeature("overworld_mysterious_ore", new ConfiguredFeature<>(Feature.ORE, overworldConfig),
                CountPlacement.of(OresConfig.OVERWORLD_AMOUNT.get()),
                InSquarePlacement.spread(),
                new DimensionBiomeFilter(key -> !Dimensions.MYSTERIOUS.equals(key)),
                HeightRangePlacement.uniform(VerticalAnchor.absolute(0), VerticalAnchor.absolute(90)));

        OreConfiguration deepslateConfig = new OreConfiguration(OreFeatures.DEEPSLATE_ORE_REPLACEABLES, Registration.MYSTERIOUS_ORE_DEEPSLATE.get().defaultBlockState(), OresConfig.DEEPSLATE_VEINSIZE.get());
        DEEPSLATE_OREGEN = registerPlacedFeature("deepslate_mysterious_ore", new ConfiguredFeature<>(Feature.ORE, deepslateConfig),
                CountPlacement.of(OresConfig.DEEPSLATE_AMOUNT.get()),
                InSquarePlacement.spread(),
                BiomeFilter.biome(),
                HeightRangePlacement.uniform(VerticalAnchor.bottom(), VerticalAnchor.aboveBottom(64)));

        OreConfiguration netherConfig = new OreConfiguration(OreFeatures.NETHER_ORE_REPLACEABLES, Registration.MYSTERIOUS_ORE_NETHER.get().defaultBlockState(), OresConfig.NETHER_VEINSIZE.get());
        NETHER_OREGEN = registerPlacedFeature("nether_mysterious_ore", new ConfiguredFeature<>(Feature.ORE, netherConfig),
                CountPlacement.of(OresConfig.NETHER_AMOUNT.get()),
                InSquarePlacement.spread(),
                BiomeFilter.biome(),
                HeightRangePlacement.uniform(VerticalAnchor.absolute(0), VerticalAnchor.absolute(90)));

        OreConfiguration endConfig = new OreConfiguration(IN_ENDSTONE, Registration.MYSTERIOUS_ORE_END.get().defaultBlockState(), OresConfig.END_VEINSIZE.get());
        END_OREGEN = registerPlacedFeature("end_mysterious_ore", new ConfiguredFeature<>(Feature.ORE, endConfig),
                CountPlacement.of(OresConfig.END_AMOUNT.get()),
                InSquarePlacement.spread(),
                BiomeFilter.biome(),
                HeightRangePlacement.uniform(VerticalAnchor.absolute(0), VerticalAnchor.absolute(100)));
    }

    private static <C extends FeatureConfiguration, F extends Feature<C>> Holder<PlacedFeature> registerPlacedFeature(String registryName, ConfiguredFeature<C, F> feature, PlacementModifier... placementModifiers) {
        return PlacementUtils.register(registryName, Holder.direct(feature), placementModifiers);
    }

    public static void onBiomeLoadingEvent(BiomeLoadingEvent event) {
        if (event.getCategory() == Biome.BiomeCategory.NETHER) {
            event.getGeneration().addFeature(GenerationStep.Decoration.UNDERGROUND_ORES, NETHER_OREGEN);
        } else if (event.getCategory() == Biome.BiomeCategory.THEEND) {
            event.getGeneration().addFeature(GenerationStep.Decoration.UNDERGROUND_ORES, END_OREGEN);
        } else {
            event.getGeneration().addFeature(GenerationStep.Decoration.UNDERGROUND_ORES, MYSTERIOUS_OREGEN);