move more things to new modules

2026-06-13 20:33:01 +00:00 · 2021-07-02 07:44:30 -07:00
parent 215a1e0e86
commit 62520af8e7
88 changed files with 300 additions and 313 deletions
@@ -0,0 +1,83 @@
+package com.dfsek.terra.addons.biome.pipeline;
+
+import com.dfsek.terra.api.vector.Vector2;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeExpander;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeHolder;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.api.world.biome.generation.pipeline.BiomeSource;
+
+public class BiomeHolderImpl implements BiomeHolder {
+    private final Vector2 origin;
+    private final int width;
+    private TerraBiome[][] biomes;
+    private final int offset;
+
+    public BiomeHolderImpl(int width, Vector2 origin) {
+        width += 4;
+        this.width = width;
+        biomes = new TerraBiome[width][width];
+        this.origin = origin;
+        this.offset = 2;
+    }
+
+    private BiomeHolderImpl(TerraBiome[][] biomes, Vector2 origin, int width, int offset) {
+        this.biomes = biomes;
+        this.origin = origin;
+        this.width = width;
+        this.offset = 2 * offset;
+    }
+
+    @Override
+    public BiomeHolder expand(BiomeExpander expander) {
+        TerraBiome[][] old = biomes;
+        int newWidth = width * 2 - 1;
+
+        biomes = new TerraBiome[newWidth][newWidth];
+
+        for(int x = 0; x < width; x++) {
+            for(int z = 0; z < width; z++) {
+                biomes[x * 2][z * 2] = old[x][z];
+                if(z != width - 1)
+                    biomes[x * 2][z * 2 + 1] = expander.getBetween(x + origin.getX(), z + 1 + origin.getZ(), old[x][z], old[x][z + 1]);
+                if(x != width - 1)
+                    biomes[x * 2 + 1][z * 2] = expander.getBetween(x + 1 + origin.getX(), z + origin.getZ(), old[x][z], old[x + 1][z]);
+                if(x != width - 1 && z != width - 1)
+                    biomes[x * 2 + 1][z * 2 + 1] = expander.getBetween(x + 1 + origin.getX(), z + 1 + origin.getZ(), old[x][z], old[x + 1][z + 1], old[x][z + 1], old[x + 1][z]);
+            }
+        }
+        return new BiomeHolderImpl(biomes, origin.setX(origin.getX() * 2 - 1).setZ(origin.getZ() * 2 - 1), newWidth, offset);
+    }
+
+    @Override
+    public void mutate(BiomeMutator mutator) {
+        for(int x = 0; x < width; x++) {
+            for(int z = 0; z < width; z++) {
+                BiomeMutator.ViewPoint viewPoint = new BiomeMutator.ViewPoint(this, x, z);
+                biomes[x][z] = mutator.mutate(viewPoint, x + origin.getX(), z + origin.getZ());
+            }
+        }
+    }
+
+    @Override
+    public void fill(BiomeSource source) {
+        for(int x = 0; x < width; x++) {
+            for(int z = 0; z < width; z++) {
+                biomes[x][z] = source.getBiome(origin.getX() + x, origin.getZ() + z);
+            }
+        }
+    }
+
+    @Override
+    public TerraBiome getBiome(int x, int z) {
+        x += offset;
+        z += offset;
+        return getBiomeRaw(x, z);
+    }
+
+    @Override
+    public TerraBiome getBiomeRaw(int x, int z) {
+        if(x >= width || z >= width || x < 0 || z < 0) return null;
+        return biomes[x][z];
+    }
+}
@@ -0,0 +1,70 @@
+package com.dfsek.terra.addons.biome.pipeline;
+
+import com.dfsek.terra.api.util.GlueList;
+import com.dfsek.terra.api.util.seeded.StageSeeded;
+import com.dfsek.terra.api.vector.Vector2;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeHolder;
+import com.dfsek.terra.api.world.biome.generation.pipeline.BiomeSource;
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class BiomePipelineImpl {
+    private final BiomeSource source;
+    private final List<Stage> stages;
+    private final int size;
+    private final int init;
+
+    private BiomePipelineImpl(BiomeSource source, List<Stage> stages, int size, int init) {
+        this.source = source;
+        this.stages = stages;
+        this.size = size;
+        this.init = init;
+    }
+
+    /**
+     * Get biomes in a chunk
+     *
+     * @param x Chunk X coord
+     * @param z Chunk Z coord
+     * @return BiomeHolder containing biomes.
+     */
+    public BiomeHolder getBiomes(int x, int z) {
+        BiomeHolder holder = new BiomeHolderImpl(init, new Vector2(x * (init - 1), z * (init - 1)));
+        holder.fill(source);
+        for(Stage stage : stages) holder = stage.apply(holder);
+        return holder;
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    public static final class BiomePipelineBuilder {
+        private final int init;
+        List<StageSeeded> stages = new ArrayList<>();
+        private int expand;
+
+        public BiomePipelineBuilder(int init) {
+            this.init = init;
+            expand = init;
+        }
+
+        public BiomePipelineImpl build(BiomeSource source, long seed) {
+            List<Stage> stagesBuilt = stages.stream().map(stageBuilder -> stageBuilder.apply(seed)).collect(Collectors.toList());
+
+            for(Stage stage : stagesBuilt) {
+                if(stage.isExpansion()) expand = expand * 2 - 1;
+            }
+
+            return new BiomePipelineImpl(source, stagesBuilt, expand, init);
+        }
+
+        public BiomePipelineBuilder addStage(StageSeeded stage) {
+            stages.add(stage);
+            return this;
+        }
+    }
+}
@@ -0,0 +1,56 @@
+package com.dfsek.terra.addons.biome.pipeline;
+
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.vector.Vector2;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.api.world.biome.generation.BiomeProvider;
+import com.dfsek.terra.api.world.biome.generation.pipeline.BiomeHolder;
+import com.dfsek.terra.api.world.biome.pipeline.BiomePipelineImpl;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import net.jafama.FastMath;
+import org.jetbrains.annotations.NotNull;
+
+public class StandardBiomeProvider implements BiomeProvider {
+    private final LoadingCache<Vector2, BiomeHolder> holderCache;
+    private final BiomePipelineImpl pipeline;
+    private final int resolution;
+    private final NoiseSampler mutator;
+    private final double noiseAmp;
+    private final int seed;
+
+    public StandardBiomeProvider(BiomePipelineImpl pipeline, TerraPlugin main, int resolution, NoiseSampler mutator, double noiseAmp, int seed) {
+        this.resolution = resolution;
+        this.mutator = mutator;
+        this.noiseAmp = noiseAmp;
+        this.seed = seed;
+        holderCache = CacheBuilder.newBuilder()
+                .maximumSize(main == null ? 32 : main.getTerraConfig().getProviderCache())
+                .build(
+                        new CacheLoader<Vector2, BiomeHolder>() {
+                            @Override
+                            public BiomeHolder load(@NotNull Vector2 key) {
+                                return pipeline.getBiomes(key.getBlockX(), key.getBlockZ());
+                            }
+                        }
+                );
+        this.pipeline = pipeline;
+    }
+
+    @Override
+    public TerraBiome getBiome(int x, int z) {
+        x += mutator.getNoiseSeeded(seed, x, z) * noiseAmp;
+        z += mutator.getNoiseSeeded(1 + seed, x, z) * noiseAmp;
+
+
+        x = FastMath.floorToInt(FastMath.floorDiv(x, resolution));
+
+        z = FastMath.floorToInt(FastMath.floorDiv(z, resolution));
+
+        int fdX = FastMath.floorDiv(x, pipeline.getSize());
+        int fdZ = FastMath.floorDiv(z, pipeline.getSize());
+        return holderCache.getUnchecked(new Vector2(fdX, fdZ)).getBiome(x - fdX * pipeline.getSize(), z - fdZ * pipeline.getSize());
+    }
+}
@@ -0,0 +1,7 @@
+package com.dfsek.terra.addons.biome.pipeline.api;
+
+import com.dfsek.terra.api.world.biome.TerraBiome;
+
+public interface BiomeExpander {
+    TerraBiome getBetween(double x, double z, TerraBiome... others);
+}
@@ -0,0 +1,16 @@
+package com.dfsek.terra.addons.biome.pipeline.api;
+
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.api.world.biome.generation.pipeline.BiomeSource;
+
+public interface BiomeHolder {
+    BiomeHolder expand(BiomeExpander expander);
+
+    void mutate(BiomeMutator mutator);
+
+    void fill(BiomeSource source);
+
+    TerraBiome getBiome(int x, int z);
+
+    TerraBiome getBiomeRaw(int x, int z);
+}
@@ -0,0 +1,24 @@
+package com.dfsek.terra.addons.biome.pipeline.api;
+
+import com.dfsek.terra.api.world.biome.TerraBiome;
+
+public interface BiomeMutator {
+    TerraBiome mutate(ViewPoint viewPoint, double x, double z);
+
+    class ViewPoint {
+        private final BiomeHolder biomes;
+        private final int offX;
+        private final int offZ;
+
+        public ViewPoint(BiomeHolder biomes, int offX, int offZ) {
+            this.biomes = biomes;
+            this.offX = offX;
+            this.offZ = offZ;
+        }
+
+
+        public TerraBiome getBiome(int x, int z) {
+            return biomes.getBiomeRaw(x + offX, z + offZ);
+        }
+    }
+}
@@ -0,0 +1,8 @@
+package com.dfsek.terra.addons.biome.pipeline.api;
+
+public interface Stage {
+    boolean isExpansion();
+
+    BiomeHolder apply(BiomeHolder in);
+
+}
@@ -0,0 +1,38 @@
+package com.dfsek.terra.addons.biome.pipeline.config;
+
+import com.dfsek.tectonic.annotations.Default;
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.terra.addons.biome.pipeline.BiomePipelineImpl;
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.util.seeded.SourceSeeded;
+import com.dfsek.terra.api.util.seeded.StageSeeded;
+import com.dfsek.terra.api.world.biome.generation.BiomeProvider;
+import com.dfsek.terra.api.world.biome.provider.StandardBiomeProvider;
+
+import java.util.List;
+
+@SuppressWarnings({"FieldMayBeFinal", "unused"})
+public class BiomePipelineTemplate extends BiomeProviderTemplate {
+    private final TerraPlugin main;
+    @Value("pipeline.initial-size")
+    @Default
+    private int initialSize = 2;
+
+    @Value("pipeline.stages")
+    private List<StageSeeded> stages;
+
+    @Value("pipeline.source")
+    private SourceSeeded source;
+
+    public BiomePipelineTemplate(TerraPlugin main) {
+        this.main = main;
+    }
+
+    @Override
+    public BiomeProvider build(long seed) {
+        BiomePipelineImpl.BiomePipelineBuilder biomePipelineBuilder = new BiomePipelineImpl.BiomePipelineBuilder(initialSize);
+        stages.forEach(biomePipelineBuilder::addStage);
+        BiomePipelineImpl pipeline = biomePipelineBuilder.build(source.apply(seed), seed);
+        return new StandardBiomeProvider(pipeline, main, resolution, blend.apply(seed), blendAmp, (int) seed);
+    }
+}
@@ -0,0 +1,18 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage;
+
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.tectonic.loading.object.ObjectTemplate;
+import com.dfsek.terra.api.util.seeded.NoiseSeeded;
+import com.dfsek.terra.api.util.seeded.SeededBuilder;
+import com.dfsek.terra.api.util.seeded.StageSeeded;
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+
+public abstract class StageTemplate implements ObjectTemplate<SeededBuilder<Stage>>, StageSeeded {
+    @Value("noise")
+    protected NoiseSeeded noise;
+
+    @Override
+    public StageSeeded get() {
+        return this;
+    }
+}
@@ -0,0 +1,13 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.expander;
+
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+import com.dfsek.terra.addons.biome.pipeline.expand.FractalExpander;
+import com.dfsek.terra.addons.biome.pipeline.stages.ExpanderStage;
+import com.dfsek.terra.addons.biome.pipeline.config.stage.StageTemplate;
+
+public class ExpanderStageTemplate extends StageTemplate {
+    @Override
+    public Stage apply(Long seed) {
+        return new ExpanderStage(new FractalExpander(noise.apply(seed)));
+    }
+}
@@ -0,0 +1,36 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.mutator.BorderListMutator;
+import com.dfsek.terra.api.util.seeded.BiomeBuilder;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@SuppressWarnings("unused")
+public class BorderListMutatorTemplate extends MutatorStageTemplate {
+    @Value("from")
+    private String from;
+
+    @Value("default-replace")
+    private String defaultReplace;
+
+    @Value("default-to")
+    private ProbabilityCollection<BiomeBuilder> defaultTo;
+
+    @Value("replace")
+    private Map<BiomeBuilder, ProbabilityCollection<BiomeBuilder>> replace;
+
+
+    @Override
+    public BiomeMutator build(long seed) {
+        Map<TerraBiome, ProbabilityCollection<TerraBiome>> replaceMap = new HashMap<>();
+
+        replace.forEach((keyBuilder, replacements) -> replaceMap.put(keyBuilder.apply(seed), replacements.map(replacement -> replacement.apply(seed), true)));
+
+        return new BorderListMutator(replaceMap, from, defaultReplace, noise.apply(seed), defaultTo.map(biomeBuilder -> biomeBuilder.apply(seed), true));
+    }
+}
@@ -0,0 +1,24 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.mutator.BorderMutator;
+import com.dfsek.terra.api.util.seeded.BiomeBuilder;
+
+@SuppressWarnings("unused")
+public class BorderMutatorTemplate extends MutatorStageTemplate {
+    @Value("from")
+    private String from;
+
+    @Value("replace")
+    private String replace;
+
+    @Value("to")
+    private ProbabilityCollection<BiomeBuilder> to;
+
+    @Override
+    public BiomeMutator build(long seed) {
+        return new BorderMutator(from, replace, noise.apply(seed), to.map(biomeBuilder -> biomeBuilder.apply(seed), true));
+    }
+}
@@ -0,0 +1,15 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+import com.dfsek.terra.addons.biome.pipeline.stages.MutatorStage;
+import com.dfsek.terra.addons.biome.pipeline.config.stage.StageTemplate;
+
+public abstract class MutatorStageTemplate extends StageTemplate {
+    public abstract BiomeMutator build(long seed);
+
+    @Override
+    public Stage apply(Long seed) {
+        return new MutatorStage(build(seed));
+    }
+}
@@ -0,0 +1,32 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.mutator.ReplaceListMutator;
+import com.dfsek.terra.api.util.seeded.BiomeBuilder;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@SuppressWarnings("unused")
+public class ReplaceListMutatorTemplate extends MutatorStageTemplate {
+    @Value("default-from")
+    private String defaultFrom;
+
+    @Value("default-to")
+    private ProbabilityCollection<BiomeBuilder> defaultTo;
+
+    @Value("to")
+    private Map<BiomeBuilder, ProbabilityCollection<BiomeBuilder>> replace;
+
+    @Override
+    public BiomeMutator build(long seed) {
+        Map<TerraBiome, ProbabilityCollection<TerraBiome>> replaceMap = new HashMap<>();
+
+        replace.forEach((biomeBuilder, biomeBuilders) -> replaceMap.put(biomeBuilder.apply(seed), biomeBuilders.map(builder -> builder.apply(seed), true)));
+
+        return new ReplaceListMutator(replaceMap, defaultFrom, defaultTo.map(biomeBuilder -> biomeBuilder.apply(seed), true), noise.apply(seed));
+    }
+}
@@ -0,0 +1,21 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.tectonic.annotations.Value;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.mutator.ReplaceMutator;
+import com.dfsek.terra.api.util.seeded.BiomeBuilder;
+
+@SuppressWarnings("unused")
+public class ReplaceMutatorTemplate extends MutatorStageTemplate {
+    @Value("from")
+    private String from;
+
+    @Value("to")
+    private ProbabilityCollection<BiomeBuilder> to;
+
+    @Override
+    public BiomeMutator build(long seed) {
+        return new ReplaceMutator(from, to.map(biomeBuilder -> biomeBuilder.apply(seed), true), noise.apply(seed));
+    }
+}
@@ -0,0 +1,11 @@
+package com.dfsek.terra.addons.biome.pipeline.config.stage.mutator;
+
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.mutator.SmoothMutator;
+
+public class SmoothMutatorTemplate extends MutatorStageTemplate {
+    @Override
+    public BiomeMutator build(long seed) {
+        return new SmoothMutator(noise.apply(seed));
+    }
+}
@@ -0,0 +1,19 @@
+package com.dfsek.terra.addons.biome.pipeline.expand;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.MathUtil;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeExpander;
+
+public class FractalExpander implements BiomeExpander {
+    private final NoiseSampler sampler;
+
+    public FractalExpander(NoiseSampler sampler) {
+        this.sampler = sampler;
+    }
+
+    @Override
+    public TerraBiome getBetween(double x, double z, TerraBiome... others) {
+        return others[MathUtil.normalizeIndex(sampler.getNoise(x, z), others.length)];
+    }
+}
@@ -0,0 +1,47 @@
+package com.dfsek.terra.addons.biome.pipeline.mutator;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+
+import java.util.Map;
+
+public class BorderListMutator implements BiomeMutator {
+    private final String border;
+    private final NoiseSampler noiseSampler;
+    private final ProbabilityCollection<TerraBiome> replaceDefault;
+    private final String defaultReplace;
+    private final Map<TerraBiome, ProbabilityCollection<TerraBiome>> replace;
+
+    public BorderListMutator(Map<TerraBiome, ProbabilityCollection<TerraBiome>> replace, String border, String defaultReplace, NoiseSampler noiseSampler, ProbabilityCollection<TerraBiome> replaceDefault) {
+        this.border = border;
+        this.noiseSampler = noiseSampler;
+        this.replaceDefault = replaceDefault;
+        this.defaultReplace = defaultReplace;
+        this.replace = replace;
+    }
+
+    @Override
+    public TerraBiome mutate(ViewPoint viewPoint, double x, double z) {
+        TerraBiome origin = viewPoint.getBiome(0, 0);
+        if(origin.getTags().contains(defaultReplace)) {
+            for(int xi = -1; xi <= 1; xi++) {
+                for(int zi = -1; zi <= 1; zi++) {
+                    if(xi == 0 && zi == 0) continue;
+                    TerraBiome current = viewPoint.getBiome(xi, zi);
+                    if(current == null) continue;
+                    if(current.getTags().contains(border)) {
+                        if(replace.containsKey(origin)) {
+                            TerraBiome biome = replace.get(origin).get(noiseSampler, x, z);
+                            return biome == null ? origin : biome;
+                        }
+                        TerraBiome biome = replaceDefault.get(noiseSampler, x, z);
+                        return biome == null ? origin : biome;
+                    }
+                }
+            }
+        }
+        return origin;
+    }
+}
@@ -0,0 +1,39 @@
+package com.dfsek.terra.addons.biome.pipeline.mutator;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+
+public class BorderMutator implements BiomeMutator {
+    private final String border;
+    private final NoiseSampler noiseSampler;
+    private final ProbabilityCollection<TerraBiome> replace;
+    private final String replaceTag;
+
+    public BorderMutator(String border, String replaceTag, NoiseSampler noiseSampler, ProbabilityCollection<TerraBiome> replace) {
+        this.border = border;
+        this.noiseSampler = noiseSampler;
+        this.replace = replace;
+        this.replaceTag = replaceTag;
+    }
+
+    @Override
+    public TerraBiome mutate(ViewPoint viewPoint, double x, double z) {
+        TerraBiome origin = viewPoint.getBiome(0, 0);
+        if(origin.getTags().contains(replaceTag)) {
+            for(int xi = -1; xi <= 1; xi++) {
+                for(int zi = -1; zi <= 1; zi++) {
+                    if(xi == 0 && zi == 0) continue;
+                    TerraBiome current = viewPoint.getBiome(xi, zi);
+                    if(current == null) continue;
+                    if(current.getTags().contains(border)) {
+                        TerraBiome biome = replace.get(noiseSampler, x, z);
+                        return biome == null ? origin : biome;
+                    }
+                }
+            }
+        }
+        return origin;
+    }
+}
@@ -0,0 +1,36 @@
+package com.dfsek.terra.addons.biome.pipeline.mutator;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+
+import java.util.Map;
+
+public class ReplaceListMutator implements BiomeMutator {
+    private final Map<TerraBiome, ProbabilityCollection<TerraBiome>> replace;
+    private final NoiseSampler sampler;
+    private final ProbabilityCollection<TerraBiome> replaceDefault;
+    private final String defaultTag;
+
+    public ReplaceListMutator(Map<TerraBiome, ProbabilityCollection<TerraBiome>> replace, String defaultTag, ProbabilityCollection<TerraBiome> replaceDefault, NoiseSampler sampler) {
+        this.replace = replace;
+        this.sampler = sampler;
+        this.defaultTag = defaultTag;
+        this.replaceDefault = replaceDefault;
+    }
+
+    @Override
+    public TerraBiome mutate(ViewPoint viewPoint, double x, double z) {
+        TerraBiome center = viewPoint.getBiome(0, 0);
+        if(replace.containsKey(center)) {
+            TerraBiome biome = replace.get(center).get(sampler, x, z);
+            return biome == null ? viewPoint.getBiome(0, 0) : biome;
+        }
+        if(viewPoint.getBiome(0, 0).getTags().contains(defaultTag)) {
+            TerraBiome biome = replaceDefault.get(sampler, x, z);
+            return biome == null ? viewPoint.getBiome(0, 0) : biome;
+        }
+        return center;
+    }
+}
@@ -0,0 +1,27 @@
+package com.dfsek.terra.addons.biome.pipeline.mutator;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+
+public class ReplaceMutator implements BiomeMutator {
+    private final String replaceableTag;
+    private final ProbabilityCollection<TerraBiome> replace;
+    private final NoiseSampler sampler;
+
+    public ReplaceMutator(String replaceable, ProbabilityCollection<TerraBiome> replace, NoiseSampler sampler) {
+        this.replaceableTag = replaceable;
+        this.replace = replace;
+        this.sampler = sampler;
+    }
+
+    @Override
+    public TerraBiome mutate(ViewPoint viewPoint, double x, double z) {
+        if(viewPoint.getBiome(0, 0).getTags().contains(replaceableTag)) {
+            TerraBiome biome = replace.get(sampler, x, z);
+            return biome == null ? viewPoint.getBiome(0, 0) : biome;
+        }
+        return viewPoint.getBiome(0, 0);
+    }
+}
@@ -0,0 +1,38 @@
+package com.dfsek.terra.addons.biome.pipeline.mutator;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.MathUtil;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+
+import java.util.Objects;
+
+public class SmoothMutator implements BiomeMutator {
+
+    private final NoiseSampler sampler;
+
+    public SmoothMutator(NoiseSampler sampler) {
+        this.sampler = sampler;
+    }
+
+    @Override
+    public TerraBiome mutate(ViewPoint viewPoint, double x, double z) {
+        TerraBiome top = viewPoint.getBiome(1, 0);
+        TerraBiome bottom = viewPoint.getBiome(-1, 0);
+        TerraBiome left = viewPoint.getBiome(0, 1);
+        TerraBiome right = viewPoint.getBiome(0, -1);
+
+
+        boolean vert = Objects.equals(top, bottom) && top != null;
+        boolean horiz = Objects.equals(left, right) && left != null;
+
+        if(vert && horiz) {
+            return MathUtil.normalizeIndex(sampler.getNoise(x, z), 2) == 0 ? left : top;
+        }
+
+        if(vert) return top;
+        if(horiz) return left;
+
+        return viewPoint.getBiome(0, 0);
+    }
+}
@@ -0,0 +1,21 @@
+package com.dfsek.terra.addons.biome.pipeline.source;
+
+import com.dfsek.terra.api.noise.NoiseSampler;
+import com.dfsek.terra.api.util.ProbabilityCollection;
+import com.dfsek.terra.api.world.biome.TerraBiome;
+import com.dfsek.terra.api.world.biome.generation.pipeline.BiomeSource;
+
+public class RandomSource implements BiomeSource {
+    private final ProbabilityCollection<TerraBiome> biomes;
+    private final NoiseSampler sampler;
+
+    public RandomSource(ProbabilityCollection<TerraBiome> biomes, NoiseSampler sampler) {
+        this.biomes = biomes;
+        this.sampler = sampler;
+    }
+
+    @Override
+    public TerraBiome getBiome(double x, double z) {
+        return biomes.get(sampler, x, z);
+    }
+}
@@ -0,0 +1,27 @@
+package com.dfsek.terra.addons.biome.pipeline.stages;
+
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeExpander;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeHolder;
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+
+public class ExpanderStage implements Stage {
+    private final BiomeExpander expander;
+
+    public ExpanderStage(BiomeExpander expander) {
+        this.expander = expander;
+    }
+
+    @Override
+    public boolean isExpansion() {
+        return true;
+    }
+
+    @Override
+    public BiomeHolder apply(BiomeHolder in) {
+        return in.expand(expander);
+    }
+
+    public enum Type {
+        FRACTAL
+    }
+}
@@ -0,0 +1,28 @@
+package com.dfsek.terra.addons.biome.pipeline.stages;
+
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeHolder;
+import com.dfsek.terra.addons.biome.pipeline.api.BiomeMutator;
+import com.dfsek.terra.addons.biome.pipeline.api.Stage;
+
+public class MutatorStage implements Stage {
+    private final BiomeMutator mutator;
+
+    public MutatorStage(BiomeMutator mutator) {
+        this.mutator = mutator;
+    }
+
+    @Override
+    public boolean isExpansion() {
+        return false;
+    }
+
+    @Override
+    public BiomeHolder apply(BiomeHolder in) {
+        in.mutate(mutator);
+        return in;
+    }
+
+    public enum Type {
+        REPLACE, REPLACE_LIST, BORDER, BORDER_LIST, SMOOTH
+    }
+}