Code/net/minecraft/world/level/biome/MultiNoiseBiomeSource.java

package net.minecraft.world.level.biome;

import com.mojang.datafixers.util.Either;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Codec;
import com.mojang.serialization.Lifecycle;
import com.mojang.serialization.MapCodec;
import java.util.List;
import java.util.Optional;
import java.util.stream.Stream;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Holder;
import net.minecraft.core.QuartPos;
import net.minecraft.resources.ResourceKey;
import net.minecraft.util.VisibleForDebug;
import net.minecraft.world.level.levelgen.NoiseRouterData;

public class MultiNoiseBiomeSource extends BiomeSource {
    private static final MapCodec<Holder<Biome>> ENTRY_CODEC = Biome.CODEC.fieldOf("biome");
    public static final MapCodec<Climate.ParameterList<Holder<Biome>>> DIRECT_CODEC = Climate.ParameterList.codec(ENTRY_CODEC).fieldOf("biomes");
    private static final MapCodec<Holder<MultiNoiseBiomeSourceParameterList>> PRESET_CODEC = MultiNoiseBiomeSourceParameterList.CODEC
        .fieldOf("preset")
        .withLifecycle(Lifecycle.stable());
    public static final MapCodec<MultiNoiseBiomeSource> CODEC = Codec.mapEither(DIRECT_CODEC, PRESET_CODEC)
        .xmap(MultiNoiseBiomeSource::new, p_275170_ -> p_275170_.parameters);
    private final Either<Climate.ParameterList<Holder<Biome>>, Holder<MultiNoiseBiomeSourceParameterList>> parameters;

    private MultiNoiseBiomeSource(Either<Climate.ParameterList<Holder<Biome>>, Holder<MultiNoiseBiomeSourceParameterList>> p_275370_) {
        this.parameters = p_275370_;
    }

    public static MultiNoiseBiomeSource createFromList(Climate.ParameterList<Holder<Biome>> p_275223_) {
        return new MultiNoiseBiomeSource(Either.left(p_275223_));
    }

    public static MultiNoiseBiomeSource createFromPreset(Holder<MultiNoiseBiomeSourceParameterList> p_275250_) {
        return new MultiNoiseBiomeSource(Either.right(p_275250_));
    }

    private Climate.ParameterList<Holder<Biome>> parameters() {
        return this.parameters.map(p_275171_ -> p_275171_, p_275172_ -> p_275172_.value().parameters());
    }

    @Override
    protected Stream<Holder<Biome>> collectPossibleBiomes() {
        return this.parameters().values().stream().map(Pair::getSecond);
    }

    @Override
    protected MapCodec<? extends BiomeSource> codec() {
        return CODEC;
    }

    public boolean stable(ResourceKey<MultiNoiseBiomeSourceParameterList> p_275637_) {
        Optional<Holder<MultiNoiseBiomeSourceParameterList>> optional = this.parameters.right();
        return optional.isPresent() && optional.get().is(p_275637_);
    }

    @Override
    public Holder<Biome> getNoiseBiome(int p_204272_, int p_204273_, int p_204274_, Climate.Sampler p_204275_) {
        return this.getNoiseBiome(p_204275_.sample(p_204272_, p_204273_, p_204274_));
    }

    @VisibleForDebug
    public Holder<Biome> getNoiseBiome(Climate.TargetPoint p_204270_) {
        return this.parameters().findValue(p_204270_);
    }

    @Override
    public void addDebugInfo(List<String> p_207895_, BlockPos p_207896_, Climate.Sampler p_207897_) {
        int i = QuartPos.fromBlock(p_207896_.getX());
        int j = QuartPos.fromBlock(p_207896_.getY());
        int k = QuartPos.fromBlock(p_207896_.getZ());
        Climate.TargetPoint climate$targetpoint = p_207897_.sample(i, j, k);
        float f = Climate.unquantizeCoord(climate$targetpoint.continentalness());
        float f1 = Climate.unquantizeCoord(climate$targetpoint.erosion());
        float f2 = Climate.unquantizeCoord(climate$targetpoint.temperature());
        float f3 = Climate.unquantizeCoord(climate$targetpoint.humidity());
        float f4 = Climate.unquantizeCoord(climate$targetpoint.weirdness());
        double d0 = NoiseRouterData.peaksAndValleys(f4);
        OverworldBiomeBuilder overworldbiomebuilder = new OverworldBiomeBuilder();
        p_207895_.add(
            "Biome builder PV: "
                + OverworldBiomeBuilder.getDebugStringForPeaksAndValleys(d0)
                + " C: "
                + overworldbiomebuilder.getDebugStringForContinentalness(f)
                + " E: "
                + overworldbiomebuilder.getDebugStringForErosion(f1)
                + " T: "
                + overworldbiomebuilder.getDebugStringForTemperature(f2)
                + " H: "
                + overworldbiomebuilder.getDebugStringForHumidity(f3)
        );
    }
}