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| 1 | +package com.github.chainmailstudios.astromine.common.world.generation.mars; |
| 2 | + |
| 3 | +import java.util.Arrays; |
| 4 | +import java.util.Random; |
| 5 | + |
| 6 | +import com.github.chainmailstudios.astromine.common.miscellaneous.BiomeGenCache; |
| 7 | +import com.github.chainmailstudios.astromine.common.noise.OctaveNoiseSampler; |
| 8 | +import com.github.chainmailstudios.astromine.common.noise.OpenSimplexNoise; |
| 9 | +import com.github.chainmailstudios.astromine.common.world.generation.moon.MoonBiomeSource; |
| 10 | +import com.github.chainmailstudios.astromine.registry.AstromineBlocks; |
| 11 | +import com.mojang.serialization.Codec; |
| 12 | +import com.mojang.serialization.codecs.RecordCodecBuilder; |
| 13 | + |
| 14 | +import net.minecraft.block.BlockState; |
| 15 | +import net.minecraft.block.Blocks; |
| 16 | +import net.minecraft.util.math.BlockPos; |
| 17 | +import net.minecraft.util.math.MathHelper; |
| 18 | +import net.minecraft.world.BlockView; |
| 19 | +import net.minecraft.world.ChunkRegion; |
| 20 | +import net.minecraft.world.Heightmap; |
| 21 | +import net.minecraft.world.WorldAccess; |
| 22 | +import net.minecraft.world.biome.Biome; |
| 23 | +import net.minecraft.world.biome.source.BiomeSource; |
| 24 | +import net.minecraft.world.chunk.Chunk; |
| 25 | +import net.minecraft.world.gen.ChunkRandom; |
| 26 | +import net.minecraft.world.gen.StructureAccessor; |
| 27 | +import net.minecraft.world.gen.chunk.ChunkGenerator; |
| 28 | +import net.minecraft.world.gen.chunk.StructuresConfig; |
| 29 | +import net.minecraft.world.gen.chunk.VerticalBlockSample; |
| 30 | + |
| 31 | +public class MarsChunkGenerator extends ChunkGenerator { |
| 32 | + public static Codec<MarsChunkGenerator> CODEC = RecordCodecBuilder.create(instance -> instance.group(BiomeSource.field_24713.fieldOf("biome_source").forGetter(gen -> gen.biomeSource), Codec.LONG.fieldOf("seed").forGetter(gen -> gen.seed)) |
| 33 | + .apply(instance, MarsChunkGenerator::new)); |
| 34 | + |
| 35 | + private final BiomeSource biomeSource; |
| 36 | + private final long seed; |
| 37 | + private final OctaveNoiseSampler<OpenSimplexNoise> lowerInterpolatedNoise; |
| 38 | + private final OctaveNoiseSampler<OpenSimplexNoise> upperInterpolatedNoise; |
| 39 | + private final OctaveNoiseSampler<OpenSimplexNoise> interpolationNoise; |
| 40 | + private final ThreadLocal<BiomeGenCache> cache; |
| 41 | + public MarsChunkGenerator(BiomeSource biomeSource, long seed) { |
| 42 | + super(biomeSource, new StructuresConfig(false)); |
| 43 | + this.biomeSource = biomeSource; |
| 44 | + this.seed = seed; |
| 45 | + Random random = new Random(seed); |
| 46 | + lowerInterpolatedNoise = new OctaveNoiseSampler<>(OpenSimplexNoise.class, random, 5, 140.43, 45, 10); |
| 47 | + upperInterpolatedNoise = new OctaveNoiseSampler<>(OpenSimplexNoise.class, random, 5, 140.43, 45, 10); |
| 48 | + interpolationNoise = new OctaveNoiseSampler<>(OpenSimplexNoise.class, random, 3, 80.32, 3, 3); |
| 49 | + this.cache = ThreadLocal.withInitial(() -> new BiomeGenCache(biomeSource)); |
| 50 | + } |
| 51 | + |
| 52 | + @Override |
| 53 | + protected Codec<? extends ChunkGenerator> method_28506() { |
| 54 | + return CODEC; |
| 55 | + } |
| 56 | + |
| 57 | + @Override |
| 58 | + public ChunkGenerator withSeed(long seed) { |
| 59 | + return new MarsChunkGenerator(new MoonBiomeSource(seed), seed); |
| 60 | + } |
| 61 | + |
| 62 | + @Override |
| 63 | + public void buildSurface(ChunkRegion region, Chunk chunk) { |
| 64 | + // Unused. |
| 65 | + } |
| 66 | + |
| 67 | + @Override |
| 68 | + public void populateNoise(WorldAccess world, StructureAccessor accessor, Chunk chunk) { |
| 69 | + int x1 = chunk.getPos().getStartX(); |
| 70 | + int z1 = chunk.getPos().getStartZ(); |
| 71 | + |
| 72 | + int x2 = chunk.getPos().getEndX(); |
| 73 | + int z2 = chunk.getPos().getEndZ(); |
| 74 | + |
| 75 | + ChunkRandom chunkRandom = new ChunkRandom(); |
| 76 | + chunkRandom.setTerrainSeed(chunk.getPos().x, chunk.getPos().z); |
| 77 | + |
| 78 | + for (int x = x1; x <= x2; ++x) { |
| 79 | + for (int z = z1; z <= z2; ++z) { |
| 80 | + float depth = 0; |
| 81 | + float scale = 0; |
| 82 | + int i = 0; |
| 83 | + |
| 84 | + // Biome lerp |
| 85 | + for (int x0 = -5; x0 <= 5; x0++) { |
| 86 | + for (int z0 = -5; z0 <= 5; z0++) { |
| 87 | + Biome biome = this.cache.get().getBiome((x + x0) >> 2, (z + z0) >> 2); |
| 88 | + |
| 89 | + i++; |
| 90 | + depth += biome.getDepth(); |
| 91 | + scale += biome.getScale(); |
| 92 | + } |
| 93 | + } |
| 94 | + |
| 95 | + depth /= i; |
| 96 | + scale /= i; |
| 97 | + |
| 98 | + // Noise calculation |
| 99 | + double noise = interpolationNoise.sample(x, z); |
| 100 | + if (noise >= 1) { |
| 101 | + noise = upperInterpolatedNoise.sample(x, z); |
| 102 | + } else if (noise <= -1) { |
| 103 | + noise = lowerInterpolatedNoise.sample(x, z); |
| 104 | + } else { |
| 105 | + noise = MathHelper.clampedLerp(lowerInterpolatedNoise.sample(x, z), upperInterpolatedNoise.sample(x, z), noise); |
| 106 | + } |
| 107 | + |
| 108 | + int height = (int) (depth + (noise * scale)); |
| 109 | + for (int y = 0; y <= height; ++y) { |
| 110 | + chunk.setBlockState(new BlockPos(x, y, z), AstromineBlocks.MARS_SOIL.getDefaultState(), false); |
| 111 | + if (y <= 5) { |
| 112 | + if (chunkRandom.nextInt(y + 1) == 0) { |
| 113 | + chunk.setBlockState(new BlockPos(x, y, z), Blocks.BEDROCK.getDefaultState(), false); |
| 114 | + } |
| 115 | + } |
| 116 | + } |
| 117 | + } |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + @Override |
| 122 | + public int getHeight(int x, int z, Heightmap.Type heightmapType) { |
| 123 | + return 0; |
| 124 | + } |
| 125 | + |
| 126 | + @Override |
| 127 | + public BlockView getColumnSample(int x, int z) { |
| 128 | + BlockState[] states = new BlockState[256]; |
| 129 | + Arrays.fill(states, Blocks.AIR.getDefaultState()); |
| 130 | + return new VerticalBlockSample(states); |
| 131 | + } |
| 132 | +} |
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