minecraft_25w45a_unobfuscated/net/minecraft/world/level/biome/BiomeSource.java

/*
 * Decompiled with CFR 0.152.
 * 
 * Could not load the following classes:
 *  com.google.common.base.Suppliers
 *  com.google.common.collect.ImmutableSet
 *  com.google.common.collect.Sets
 *  com.mojang.datafixers.util.Pair
 *  com.mojang.serialization.Codec
 *  com.mojang.serialization.MapCodec
 *  org.jspecify.annotations.Nullable
 */
package net.minecraft.world.level.biome;

import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Codec;
import com.mojang.serialization.MapCodec;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import net.minecraft.SharedConstants;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.Holder;
import net.minecraft.core.QuartPos;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.biome.BiomeResolver;
import net.minecraft.world.level.biome.Climate;
import org.jspecify.annotations.Nullable;

public abstract class BiomeSource
implements BiomeResolver {
    public static final Codec<BiomeSource> CODEC = BuiltInRegistries.BIOME_SOURCE.byNameCodec().dispatchStable(BiomeSource::codec, Function.identity());
    private final Supplier<Set<Holder<Biome>>> possibleBiomes = Suppliers.memoize(() -> (Set)this.collectPossibleBiomes().distinct().collect(ImmutableSet.toImmutableSet()));

    protected BiomeSource() {
    }

    protected abstract MapCodec<? extends BiomeSource> codec();

    protected abstract Stream<Holder<Biome>> collectPossibleBiomes();

    public Set<Holder<Biome>> possibleBiomes() {
        return this.possibleBiomes.get();
    }

    public Set<Holder<Biome>> getBiomesWithin(int x, int y, int z, int r, Climate.Sampler sampler) {
        int x0 = QuartPos.fromBlock(x - r);
        int y0 = QuartPos.fromBlock(y - r);
        int z0 = QuartPos.fromBlock(z - r);
        int x1 = QuartPos.fromBlock(x + r);
        int y1 = QuartPos.fromBlock(y + r);
        int z1 = QuartPos.fromBlock(z + r);
        int w = x1 - x0 + 1;
        int d = y1 - y0 + 1;
        int h = z1 - z0 + 1;
        HashSet biomeSet = Sets.newHashSet();
        for (int row = 0; row < h; ++row) {
            for (int column = 0; column < w; ++column) {
                for (int depth = 0; depth < d; ++depth) {
                    int noiseX = x0 + column;
                    int noiseY = y0 + depth;
                    int noiseZ = z0 + row;
                    biomeSet.add(this.getNoiseBiome(noiseX, noiseY, noiseZ, sampler));
                }
            }
        }
        return biomeSet;
    }

    public @Nullable Pair<BlockPos, Holder<Biome>> findBiomeHorizontal(int x, int y, int z, int searchRadius, Predicate<Holder<Biome>> allowed, RandomSource random, Climate.Sampler sampler) {
        return this.findBiomeHorizontal(x, y, z, searchRadius, 1, allowed, random, false, sampler);
    }

    public @Nullable Pair<BlockPos, Holder<Biome>> findClosestBiome3d(BlockPos origin, int searchRadius, int sampleResolutionHorizontal, int sampleResolutionVertical, Predicate<Holder<Biome>> allowed, Climate.Sampler sampler, LevelReader level) {
        Set candidateBiomes = this.possibleBiomes().stream().filter(allowed).collect(Collectors.toUnmodifiableSet());
        if (candidateBiomes.isEmpty()) {
            return null;
        }
        int sampleRadius = Math.floorDiv(searchRadius, sampleResolutionHorizontal);
        int[] sampleYs = Mth.outFromOrigin(origin.getY(), level.getMinY() + 1, level.getMaxY() + 1, sampleResolutionVertical).toArray();
        for (BlockPos.MutableBlockPos sampleColumn : BlockPos.spiralAround(BlockPos.ZERO, sampleRadius, Direction.EAST, Direction.SOUTH)) {
            int blockX = origin.getX() + sampleColumn.getX() * sampleResolutionHorizontal;
            int blockZ = origin.getZ() + sampleColumn.getZ() * sampleResolutionHorizontal;
            int noiseX = QuartPos.fromBlock(blockX);
            int noiseZ = QuartPos.fromBlock(blockZ);
            for (int blockY : sampleYs) {
                int noiseY = QuartPos.fromBlock(blockY);
                Holder<Biome> biome = this.getNoiseBiome(noiseX, noiseY, noiseZ, sampler);
                if (!candidateBiomes.contains(biome)) continue;
                return Pair.of((Object)new BlockPos(blockX, blockY, blockZ), biome);
            }
        }
        return null;
    }

    public @Nullable Pair<BlockPos, Holder<Biome>> findBiomeHorizontal(int originX, int originY, int originZ, int searchRadius, int skipSteps, Predicate<Holder<Biome>> allowed, RandomSource random, boolean findClosest, Climate.Sampler sampler) {
        int startRadius;
        int noiseCenterX = QuartPos.fromBlock(originX);
        int noiseCenterZ = QuartPos.fromBlock(originZ);
        int noiseRadius = QuartPos.fromBlock(searchRadius);
        int noiseY = QuartPos.fromBlock(originY);
        Pair result = null;
        int found = 0;
        for (int currentRadius = startRadius = findClosest ? 0 : noiseRadius; currentRadius <= noiseRadius; currentRadius += skipSteps) {
            int z;
            int n = z = SharedConstants.DEBUG_ONLY_GENERATE_HALF_THE_WORLD || SharedConstants.debugGenerateSquareTerrainWithoutNoise ? 0 : -currentRadius;
            while (z <= currentRadius) {
                boolean zEdge = Math.abs(z) == currentRadius;
                for (int x = -currentRadius; x <= currentRadius; x += skipSteps) {
                    int noiseZ;
                    int noiseX;
                    Holder<Biome> biome;
                    if (findClosest) {
                        boolean xEdge;
                        boolean bl = xEdge = Math.abs(x) == currentRadius;
                        if (!xEdge && !zEdge) continue;
                    }
                    if (!allowed.test(biome = this.getNoiseBiome(noiseX = noiseCenterX + x, noiseY, noiseZ = noiseCenterZ + z, sampler))) continue;
                    if (result == null || random.nextInt(found + 1) == 0) {
                        BlockPos resultPos = new BlockPos(QuartPos.toBlock(noiseX), originY, QuartPos.toBlock(noiseZ));
                        if (findClosest) {
                            return Pair.of((Object)resultPos, biome);
                        }
                        result = Pair.of((Object)resultPos, biome);
                    }
                    ++found;
                }
                z += skipSteps;
            }
        }
        return result;
    }

    @Override
    public abstract Holder<Biome> getNoiseBiome(int var1, int var2, int var3, Climate.Sampler var4);

    public void addDebugInfo(List<String> result, BlockPos feetPos, Climate.Sampler sampler) {
    }
}