Implemented new biome API.

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitBiomeRegistry.java

@@ -0,0 +1,79 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.bukkit;
+
+import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.BiomeData;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import org.bukkit.block.Biome;
+
+import javax.annotation.Nullable;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A biome registry for Bukkit.
+ */
+class BukkitBiomeRegistry implements BiomeRegistry {
+
+    BukkitBiomeRegistry() {
+    }
+
+    @Nullable
+    @Override
+    public BaseBiome createFromId(int id) {
+        return new BaseBiome(id);
+    }
+
+    @Override
+    public List<BaseBiome> getBiomes() {
+        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
+        if (adapter != null) {
+            List<BaseBiome> biomes = new ArrayList<BaseBiome>();
+            for (Biome biome : Biome.values()) {
+                int biomeId = adapter.getBiomeId(biome);
+                biomes.add(new BaseBiome(biomeId));
+            }
+            return biomes;
+        } else {
+            return Collections.emptyList();
+        }
+    }
+
+    @Nullable
+    @Override
+    public BiomeData getData(BaseBiome biome) {
+        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
+        if (adapter != null) {
+            final Biome bukkitBiome = adapter.getBiome(biome.getId());
+            return new BiomeData() {
+                @Override
+                public String getName() {
+                    return bukkitBiome.name();
+                }
+            };
+        } else {
+            return null;
+        }
+    }
+
+}

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitBiomeType.java

@@ -1,106 +0,0 @@
-/*
- * WorldEdit, a Minecraft world manipulation toolkit
- * Copyright (C) sk89q <http://www.sk89q.com>
- * Copyright (C) WorldEdit team and contributors
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.sk89q.worldedit.bukkit;
-
-import java.util.Locale;
-
-import org.bukkit.block.Biome;
-
-import com.sk89q.worldedit.BiomeType;
-
-public enum BukkitBiomeType implements BiomeType {
-
-    SWAMPLAND(Biome.SWAMPLAND),
-    FOREST(Biome.FOREST),
-    TAIGA(Biome.TAIGA),
-    DESERT(Biome.DESERT),
-    PLAINS(Biome.PLAINS),
-    HELL(Biome.HELL),
-    SKY(Biome.SKY),
-    RIVER(Biome.RIVER),
-    EXTREME_HILLS(Biome.EXTREME_HILLS),
-    OCEAN(Biome.OCEAN),
-    FROZEN_OCEAN(Biome.FROZEN_OCEAN),
-    FROZEN_RIVER(Biome.FROZEN_RIVER),
-    ICE_PLAINS(Biome.ICE_PLAINS),
-    ICE_MOUNTAINS(Biome.ICE_MOUNTAINS),
-    MUSHROOM_ISLAND(Biome.MUSHROOM_ISLAND),
-    MUSHROOM_SHORE(Biome.MUSHROOM_SHORE),
-    BEACH(Biome.BEACH),
-    DESERT_HILLS(Biome.DESERT_HILLS),
-    FOREST_HILLS(Biome.FOREST_HILLS),
-    TAIGA_HILLS(Biome.TAIGA_HILLS),
-    SMALL_MOUNTAINS(Biome.SMALL_MOUNTAINS),
-    JUNGLE(Biome.JUNGLE),
-    JUNGLE_HILLS(Biome.JUNGLE_HILLS),
-    JUNGLE_EDGE(Biome.JUNGLE_EDGE),
-    DEEP_OCEAN(Biome.DEEP_OCEAN),
-    STONE_BEACH(Biome.STONE_BEACH),
-    COLD_BEACH(Biome.COLD_BEACH),
-    BIRCH_FOREST(Biome.BIRCH_FOREST),
-    BIRCH_FOREST_HILLS(Biome.BIRCH_FOREST_HILLS),
-    ROOFED_FOREST(Biome.ROOFED_FOREST),
-    COLD_TAIGA(Biome.COLD_TAIGA),
-    COLD_TAIGA_HILLS(Biome.COLD_TAIGA_HILLS),
-    MEGA_TAIGA(Biome.MEGA_TAIGA),
-    MEGA_TAIGA_HILLS(Biome.MEGA_TAIGA_HILLS),
-    EXTREME_HILLS_PLUS(Biome.EXTREME_HILLS_PLUS),
-    SAVANNA(Biome.SAVANNA),
-    SAVANNA_PLATEAU(Biome.SAVANNA_PLATEAU),
-    MESA(Biome.MESA),
-    MESA_PLATEAU_FOREST(Biome.MESA_PLATEAU_FOREST),
-    MESA_PLATEAU(Biome.MESA_PLATEAU),
-    SUNFLOWER_PLAINS(Biome.SUNFLOWER_PLAINS),
-    DESERT_MOUNTAINS(Biome.DESERT_MOUNTAINS),
-    FLOWER_FOREST(Biome.FLOWER_FOREST),
-    TAIGA_MOUNTAINS(Biome.TAIGA_MOUNTAINS),
-    SWAMPLAND_MOUNTAINS(Biome.SWAMPLAND_MOUNTAINS),
-    ICE_PLAINS_SPIKES(Biome.ICE_PLAINS_SPIKES),
-    JUNGLE_MOUNTAINS(Biome.JUNGLE_MOUNTAINS),
-    JUNGLE_EDGE_MOUNTAINS(Biome.JUNGLE_EDGE_MOUNTAINS),
-    COLD_TAIGA_MOUNTAINS(Biome.COLD_TAIGA_MOUNTAINS),
-    SAVANNA_MOUNTAINS(Biome.SAVANNA_MOUNTAINS),
-    SAVANNA_PLATEAU_MOUNTAINS(Biome.SAVANNA_PLATEAU_MOUNTAINS),
-    MESA_BRYCE(Biome.MESA_BRYCE),
-    MESA_PLATEAU_FOREST_MOUNTAINS(Biome.MESA_PLATEAU_FOREST_MOUNTAINS),
-    MESA_PLATEAU_MOUNTAINS(Biome.MESA_PLATEAU_MOUNTAINS),
-    BIRCH_FOREST_MOUNTAINS(Biome.BIRCH_FOREST_MOUNTAINS),
-    BIRCH_FOREST_HILLS_MOUNTAINS(Biome.BIRCH_FOREST_HILLS_MOUNTAINS),
-    ROOFED_FOREST_MOUNTAINS(Biome.ROOFED_FOREST_MOUNTAINS),
-    MEGA_SPRUCE_TAIGA(Biome.MEGA_SPRUCE_TAIGA),
-    EXTREME_HILLS_MOUNTAINS(Biome.EXTREME_HILLS_MOUNTAINS),
-    EXTREME_HILLS_PLUS_MOUNTAINS(Biome.EXTREME_HILLS_PLUS_MOUNTAINS),
-    MEGA_SPRUCE_TAIGA_HILLS(Biome.MEGA_SPRUCE_TAIGA_HILLS);
-
-    private Biome bukkitBiome;
-
-    private BukkitBiomeType(Biome biome) {
-        this.bukkitBiome = biome;
-    }
-
-    @Override
-    public String getName() {
-        return name().toLowerCase(Locale.ENGLISH);
-    }
-
-    public Biome getBukkitBiome() {
-        return bukkitBiome;
-    }
-}

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitBiomeTypes.java

@@ -1,59 +0,0 @@
-/*
- * WorldEdit, a Minecraft world manipulation toolkit
- * Copyright (C) sk89q <http://www.sk89q.com>
- * Copyright (C) WorldEdit team and contributors
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.sk89q.worldedit.bukkit;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.Locale;
-
-import com.sk89q.worldedit.BiomeType;
-import com.sk89q.worldedit.BiomeTypes;
-import com.sk89q.worldedit.UnknownBiomeTypeException;
-
-public class BukkitBiomeTypes implements BiomeTypes {
-
-    public BukkitBiomeTypes() {
-    }
-
-    @Override
-    public boolean has(String name) {
-        try {
-            BukkitBiomeType.valueOf(name.toUpperCase(Locale.ENGLISH));
-            return true;
-        } catch (IllegalArgumentException exc) {
-            return false;
-        }
-    }
-
-    @Override
-    public BiomeType get(String name) throws UnknownBiomeTypeException {
-        try {
-            return BukkitBiomeType.valueOf(name.toUpperCase(Locale.ENGLISH));
-        } catch (IllegalArgumentException exc) {
-            throw new UnknownBiomeTypeException(name);
-        }
-    }
-
-    @Override
-    public List<BiomeType> all() {
-        return Arrays.<BiomeType>asList(BukkitBiomeType.values());
-    }
-
-}

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitServerInterface.java

@@ -21,7 +21,6 @@ package com.sk89q.worldedit.bukkit;
 
 import com.sk89q.bukkit.util.CommandInfo;
 import com.sk89q.bukkit.util.CommandRegistration;
-import com.sk89q.worldedit.BiomeTypes;
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.LocalWorld;
 import com.sk89q.worldedit.ServerInterface;
@@ -50,13 +49,13 @@ public class BukkitServerInterface extends ServerInterface implements MultiUserP
     public Server server;
     public WorldEditPlugin plugin;
     private CommandRegistration dynamicCommands;
-    private BukkitBiomeTypes biomes;
+    private BukkitBiomeRegistry biomes;
     private boolean hookingEvents;
 
     public BukkitServerInterface(WorldEditPlugin plugin, Server server) {
         this.plugin = plugin;
         this.server = server;
-        this.biomes = new BukkitBiomeTypes();
+        this.biomes = new BukkitBiomeRegistry();
         dynamicCommands = new CommandRegistration(plugin);
     }
 
@@ -81,11 +80,6 @@ public class BukkitServerInterface extends ServerInterface implements MultiUserP
         plugin.loadConfiguration();
     }
 
-    @Override
-    public BiomeTypes getBiomes() {
-        return biomes;
-    }
-
     @Override
     public int schedule(long delay, long period, Runnable task) {
         return Bukkit.getScheduler().scheduleSyncRepeatingTask(plugin, task, delay, period);

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.bukkit;
 
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.BlockVector2D;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.LocalWorld;
@@ -34,7 +33,7 @@ import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.TreeGenerator;
-import com.sk89q.worldedit.world.registry.LegacyWorldData;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 import com.sk89q.worldedit.world.registry.WorldData;
 import org.bukkit.Effect;
 import org.bukkit.Material;
@@ -161,25 +160,6 @@ public class BukkitWorld extends LocalWorld {
         return getWorld().getBlockAt(pt.getBlockX(), pt.getBlockY(), pt.getBlockZ()).getLightLevel();
     }
 
-    @Override
-    public BiomeType getBiome(Vector2D pt) {
-        Biome bukkitBiome = getWorld().getBiome(pt.getBlockX(), pt.getBlockZ());
-        try {
-            return BukkitBiomeType.valueOf(bukkitBiome.name());
-        } catch (IllegalArgumentException exc) {
-            return BiomeType.UNKNOWN;
-        }
-    }
-
-    @Override
-    public void setBiome(Vector2D pt, BiomeType biome) {
-        if (biome instanceof BukkitBiomeType) {
-            Biome bukkitBiome;
-            bukkitBiome = ((BukkitBiomeType) biome).getBukkitBiome();
-            getWorld().setBiome(pt.getBlockX(), pt.getBlockZ(), bukkitBiome);
-        }
-    }
-
     @Override
     public boolean regenerate(Region region, EditSession editSession) {
         BaseBlock[] history = new BaseBlock[16 * 16 * (getMaxY() + 1)];
@@ -413,7 +393,7 @@ public class BukkitWorld extends LocalWorld {
 
     @Override
     public WorldData getWorldData() {
-        return LegacyWorldData.getInstance();
+        return BukkitWorldData.getInstance();
     }
 
     @Override
@@ -451,6 +431,29 @@ public class BukkitWorld extends LocalWorld {
         return new LazyBlock(bukkitBlock.getTypeId(), bukkitBlock.getData(), this, position);
     }
 
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
+        if (adapter != null) {
+            int id = adapter.getBiomeId(getWorld().getBiome(position.getBlockX(), position.getBlockZ()));
+            return new BaseBiome(id);
+        } else {
+            return new BaseBiome(0);
+        }
+    }
+
+    @Override
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
+        if (adapter != null) {
+            Biome bukkitBiome = adapter.getBiome(biome.getId());
+            getWorld().setBiome(position.getBlockX(), position.getBlockZ(), bukkitBiome);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
     /**
      * @deprecated Use {@link #setBlock(Vector, BaseBlock, boolean)}
      */
@@ -458,5 +461,4 @@ public class BukkitWorld extends LocalWorld {
     public boolean setBlock(Vector pt, com.sk89q.worldedit.foundation.Block block, boolean notifyAdjacent) throws WorldEditException {
         return setBlock(pt, (BaseBlock) block, notifyAdjacent);
     }
-
 }

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitWorldData.java

@@ -0,0 +1,53 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.bukkit;
+
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import com.sk89q.worldedit.world.registry.LegacyWorldData;
+
+/**
+ * World data for the Bukkit platform.
+ */
+class BukkitWorldData extends LegacyWorldData {
+
+    private static final BukkitWorldData INSTANCE = new BukkitWorldData();
+    private final BiomeRegistry biomeRegistry = new BukkitBiomeRegistry();
+
+    /**
+     * Create a new instance.
+     */
+    BukkitWorldData() {
+    }
+
+    @Override
+    public BiomeRegistry getBiomeRegistry() {
+        return biomeRegistry;
+    }
+
+    /**
+     * Get a static instance.
+     *
+     * @return an instance
+     */
+    public static BukkitWorldData getInstance() {
+        return INSTANCE;
+    }
+
+}

src/bukkit/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java

@@ -22,6 +22,8 @@ package com.sk89q.worldedit.bukkit.adapter;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.entity.BaseEntity;
 import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.Biome;
 import org.bukkit.entity.Entity;
 
 import javax.annotation.Nullable;
@@ -31,6 +33,46 @@ import javax.annotation.Nullable;
  */
 public interface BukkitImplAdapter {
 
+    /**
+     * Get the block ID for the given material.
+     *
+     * <p>Returns 0 if it is not known or it doesn't exist.</p>
+     *
+     * @param material the material
+     * @return the block ID
+     */
+    int getBlockId(Material material);
+
+    /**
+     * Get the material for the given block ID.
+     *
+     * <p>Returns {@link Material#AIR} if it is not known or it doesn't exist.</p>
+     *
+     * @param id the block ID
+     * @return the material
+     */
+    Material getMaterial(int id);
+
+    /**
+     * Get the biome ID for the given biome.
+     *
+     * <p>Returns 0 if it is not known or it doesn't exist.</p>
+     *
+     * @param biome biome
+     * @return the biome ID
+     */
+    int getBiomeId(Biome biome);
+
+    /**
+     * Get the biome ID for the given biome ID..
+     *
+     * <p>Returns {@link Biome#OCEAN} if it is not known or it doesn't exist.</p>
+     *
+     * @param id the biome ID
+     * @return the biome
+     */
+    Biome getBiome(int id);
+
     /**
      * Get the block at the given location.
      *

src/forge/java/com/sk89q/worldedit/forge/ForgeBiomeRegistry.java

@@ -0,0 +1,107 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.forge;
+
+import com.google.common.collect.HashBiMap;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.BiomeData;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import net.minecraft.world.biome.BiomeGenBase;
+
+import javax.annotation.Nullable;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Provides access to biome data in Forge.
+ */
+class ForgeBiomeRegistry implements BiomeRegistry {
+
+    private static Map<Integer, BiomeGenBase> biomes = Collections.emptyMap();
+    private static Map<Integer, BiomeData> biomeData = Collections.emptyMap();
+
+    @Nullable
+    @Override
+    public BaseBiome createFromId(int id) {
+        return new BaseBiome(id);
+    }
+
+    @Override
+    public List<BaseBiome> getBiomes() {
+        List<BaseBiome> list = new ArrayList<BaseBiome>();
+        for (int biome : biomes.keySet()) {
+            list.add(new BaseBiome(biome));
+        }
+        return list;
+    }
+
+    @Nullable
+    @Override
+    public BiomeData getData(BaseBiome biome) {
+        return biomeData.get(biome.getId());
+    }
+
+    /**
+     * Populate the internal static list of biomes.
+     *
+     * <p>If called repeatedly, the last call will overwrite all previous
+     * calls.</p>
+     */
+    static void populate() {
+        Map<Integer, BiomeGenBase> biomes = HashBiMap.create();
+        Map<Integer, BiomeData> biomeData = new HashMap<Integer, BiomeData>();
+
+        for (BiomeGenBase biome : BiomeGenBase.biomeList) {
+            if ((biome == null) || (biomes.containsValue(biome))) {
+                continue;
+            }
+            biomes.put(biome.biomeID, biome);
+            biomeData.put(biome.biomeID, new ForgeBiomeData(biome));
+        }
+
+        ForgeBiomeRegistry.biomes = biomes;
+        ForgeBiomeRegistry.biomeData = biomeData;
+    }
+
+    /**
+     * Cached biome data information.
+     */
+    private static class ForgeBiomeData implements BiomeData {
+        private final BiomeGenBase biome;
+
+        /**
+         * Create a new instance.
+         *
+         * @param biome the base biome
+         */
+        private ForgeBiomeData(BiomeGenBase biome) {
+            this.biome = biome;
+        }
+
+        @Override
+        public String getName() {
+            return biome.biomeName;
+        }
+    }
+
+}

src/forge/java/com/sk89q/worldedit/forge/ForgeBiomeTypes.java

@@ -1,87 +0,0 @@
-/*
- * WorldEdit, a Minecraft world manipulation toolkit
- * Copyright (C) sk89q <http://www.sk89q.com>
- * Copyright (C) WorldEdit team and contributors
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.sk89q.worldedit.forge;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-
-import net.minecraft.world.biome.BiomeGenBase;
-
-import com.google.common.collect.BiMap;
-import com.google.common.collect.HashBiMap;
-import com.sk89q.worldedit.BiomeType;
-import com.sk89q.worldedit.BiomeTypes;
-import com.sk89q.worldedit.UnknownBiomeTypeException;
-
-public class ForgeBiomeTypes implements BiomeTypes {
-    private static BiMap<BiomeType, BiomeGenBase> biomes = HashBiMap.create();
-
-    public ForgeBiomeTypes() {
-        all();
-    }
-
-    public boolean has(String name) {
-        for (BiomeGenBase biome : BiomeGenBase.biomeList) {
-            if ((biome != null) && (biome.biomeName.equalsIgnoreCase(name))) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    public BiomeType get(String name) throws UnknownBiomeTypeException {
-        if (biomes == null) {
-            all();
-        }
-        Iterator<BiomeType> it = biomes.keySet().iterator();
-        while (it.hasNext()) {
-            BiomeType test = (BiomeType) it.next();
-            if (test.getName().equalsIgnoreCase(name)) {
-                return test;
-            }
-        }
-        throw new UnknownBiomeTypeException(name);
-    }
-
-    public List<BiomeType> all() {
-        if (biomes.isEmpty()) {
-            biomes = HashBiMap.create(new HashMap<BiomeType, BiomeGenBase>());
-            for (BiomeGenBase biome : BiomeGenBase.biomeList) {
-                if ((biome == null) || (biomes.containsValue(biome))) {
-                    continue;
-                }
-                biomes.put(new ForgeBiomeType(biome), biome);
-            }
-        }
-        List<BiomeType> retBiomes = new ArrayList<BiomeType>();
-        retBiomes.addAll(biomes.keySet());
-        return retBiomes;
-    }
-
-    public static BiomeType getFromBaseBiome(BiomeGenBase biome) {
-        return biomes.containsValue(biome) ? (BiomeType) biomes.inverse().get(biome) : BiomeType.UNKNOWN;
-    }
-
-    public static BiomeGenBase getFromBiomeType(BiomeType biome) {
-        return (BiomeGenBase) biomes.get(biome);
-    }
-}

src/forge/java/com/sk89q/worldedit/forge/ForgePlatform.java

@@ -19,7 +19,7 @@
 
 package com.sk89q.worldedit.forge;
 
-import com.sk89q.worldedit.BiomeTypes;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.ServerInterface;
 import com.sk89q.worldedit.entity.Player;
@@ -56,13 +56,13 @@ class ForgePlatform extends ServerInterface implements MultiUserPlatform {
 
     private final ForgeWorldEdit mod;
     private final MinecraftServer server;
-    private final ForgeBiomeTypes biomes;
+    private final ForgeBiomeRegistry biomes;
     private boolean hookingEvents = false;
 
     ForgePlatform(ForgeWorldEdit mod) {
         this.mod = mod;
         this.server = FMLCommonHandler.instance().getMinecraftServerInstance();
-        this.biomes = new ForgeBiomeTypes();
+        this.biomes = new ForgeBiomeRegistry();
     }
 
     boolean isHookingEvents() {
@@ -95,11 +95,6 @@ class ForgePlatform extends ServerInterface implements MultiUserPlatform {
     public void reload() {
     }
 
-    @Override
-    public BiomeTypes getBiomes() {
-        return this.biomes;
-    }
-
     @Override
     public int schedule(long delay, long period, Runnable task) {
         return -1;

src/forge/java/com/sk89q/worldedit/forge/ForgeWorld.java

@@ -20,7 +20,6 @@
 package com.sk89q.worldedit.forge;
 
 import com.sk89q.jnbt.CompoundTag;
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.Vector;
@@ -36,7 +35,7 @@ import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
 import com.sk89q.worldedit.world.AbstractWorld;
-import com.sk89q.worldedit.world.registry.LegacyWorldData;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 import com.sk89q.worldedit.world.registry.WorldData;
 import net.minecraft.block.Block;
 import net.minecraft.entity.EntityList;
@@ -181,22 +180,23 @@ public class ForgeWorld extends AbstractWorld {
     }
 
     @Override
-    public BiomeType getBiome(Vector2D position) {
+    public BaseBiome getBiome(Vector2D position) {
         checkNotNull(position);
-        return ForgeBiomeTypes.getFromBaseBiome(getWorld().getBiomeGenForCoords(position.getBlockX(), position.getBlockZ()));
+        return new BaseBiome(getWorld().getBiomeGenForCoords(position.getBlockX(), position.getBlockZ()).biomeID);
     }
 
     @Override
-    public void setBiome(Vector2D position, BiomeType biome) {
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
         checkNotNull(position);
         checkNotNull(biome);
 
-        if (getWorld().getChunkProvider().chunkExists(position.getBlockX(), position.getBlockZ())) {
         Chunk chunk = getWorld().getChunkFromBlockCoords(position.getBlockX(), position.getBlockZ());
         if ((chunk != null) && (chunk.isChunkLoaded)) {
-                chunk.getBiomeArray()[((position.getBlockZ() & 0xF) << 4 | position.getBlockX() & 0xF)] = (byte) ForgeBiomeTypes.getFromBiomeType(biome).biomeID;
+            chunk.getBiomeArray()[((position.getBlockZ() & 0xF) << 4 | position.getBlockX() & 0xF)] = (byte) biome.getId();
-            }
+            return true;
         }
+
+        return false;
     }
 
     @Override
@@ -317,7 +317,7 @@ public class ForgeWorld extends AbstractWorld {
 
     @Override
     public WorldData getWorldData() {
-        return LegacyWorldData.getInstance();
+        return ForgeWorldData.getInstance();
     }
 
     @Override

src/forge/java/com/sk89q/worldedit/forge/ForgeWorldData.java

@@ -19,18 +19,35 @@
 
 package com.sk89q.worldedit.forge;
 
-import net.minecraft.world.biome.BiomeGenBase;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+import com.sk89q.worldedit.world.registry.LegacyWorldData;
 
-import com.sk89q.worldedit.BiomeType;
+/**
+ * World data for the Forge platform.
+ */
+class ForgeWorldData extends LegacyWorldData {
 
-public class ForgeBiomeType implements BiomeType {
+    private static final ForgeWorldData INSTANCE = new ForgeWorldData();
-    private BiomeGenBase biome;
+    private final BiomeRegistry biomeRegistry = new ForgeBiomeRegistry();
 
-    public ForgeBiomeType(BiomeGenBase biome) {
+    /**
-        this.biome = biome;
+     * Create a new instance.
+     */
+    ForgeWorldData() {
     }
 
-    public String getName() {
+    @Override
-        return this.biome.biomeName;
+    public BiomeRegistry getBiomeRegistry() {
+        return biomeRegistry;
     }
+
+    /**
+     * Get a static instance.
+     *
+     * @return an instance
+     */
+    public static ForgeWorldData getInstance() {
+        return INSTANCE;
+    }
+
 }

src/forge/java/com/sk89q/worldedit/forge/ForgeWorldEdit.java

@@ -103,6 +103,8 @@ public class ForgeWorldEdit {
             WorldEdit.getInstance().getPlatformManager().unregister(platform);
         }
 
+        ForgeBiomeRegistry.populate();
+
         this.platform = new ForgePlatform(this);
 
         WorldEdit.getInstance().getPlatformManager().register(platform);

src/main/java/com/sk89q/worldedit/EditSession.java

@@ -76,6 +76,7 @@ import com.sk89q.worldedit.util.collection.DoubleArrayList;
 import com.sk89q.worldedit.util.eventbus.EventBus;
 import com.sk89q.worldedit.world.NullWorld;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import javax.annotation.Nullable;
 import java.util.*;
@@ -377,6 +378,16 @@ public class EditSession implements Extent {
         return changeSet.size();
     }
 
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        return bypassNone.getBiome(position);
+    }
+
+    @Override
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        return bypassNone.setBiome(position, biome);
+    }
+
     @Override
     public BaseBlock getLazyBlock(Vector position) {
         return world.getLazyBlock(position);
@@ -2248,7 +2259,7 @@ public class EditSession implements Extent {
         } // while
     }
 
-    public int makeBiomeShape(final Region region, final Vector zero, final Vector unit, final BiomeType biomeType, final String expressionString, final boolean hollow) throws ExpressionException, MaxChangedBlocksException {
+    public int makeBiomeShape(final Region region, final Vector zero, final Vector unit, final BaseBiome biomeType, final String expressionString, final boolean hollow) throws ExpressionException, MaxChangedBlocksException {
         final Vector2D zero2D = zero.toVector2D();
         final Vector2D unit2D = unit.toVector2D();
 
@@ -2261,7 +2272,7 @@ public class EditSession implements Extent {
 
         final ArbitraryBiomeShape shape = new ArbitraryBiomeShape(region) {
             @Override
-            protected BiomeType getBiome(int x, int z, BiomeType defaultBiomeType) {
+            protected BaseBiome getBiome(int x, int z, BaseBiome defaultBiomeType) {
                 final Vector2D current = new Vector2D(x, z);
                 environment.setCurrentBlock(current.toVector(0));
                 final Vector2D scaled = current.subtract(zero2D).divide(unit2D);

src/main/java/com/sk89q/worldedit/command/BiomeCommands.java

@@ -23,15 +23,29 @@ import com.sk89q.minecraft.util.commands.Command;
 import com.sk89q.minecraft.util.commands.CommandContext;
 import com.sk89q.minecraft.util.commands.CommandPermissions;
 import com.sk89q.minecraft.util.commands.Logging;
-import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.entity.Player;
-import com.sk89q.worldedit.extension.platform.Actor;
+import com.sk89q.worldedit.function.FlatRegionFunction;
+import com.sk89q.worldedit.function.FlatRegionMaskingFilter;
+import com.sk89q.worldedit.function.biome.BiomeReplace;
 import com.sk89q.worldedit.function.mask.Mask;
-import com.sk89q.worldedit.masks.BiomeTypeMask;
+import com.sk89q.worldedit.function.mask.Mask2D;
-import com.sk89q.worldedit.masks.InvertedMask;
+import com.sk89q.worldedit.function.operation.Operations;
+import com.sk89q.worldedit.function.visitor.FlatRegionVisitor;
+import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.FlatRegion;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.regions.Regions;
+import com.sk89q.worldedit.util.command.binding.Switch;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.BiomeData;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
 
 import java.util.HashSet;
 import java.util.List;
@@ -64,7 +78,7 @@ public class BiomeCommands {
         max = 1
     )
     @CommandPermissions("worldedit.biome.list")
-    public void biomeList(Actor actor, CommandContext args) throws WorldEditException {
+    public void biomeList(Player player, CommandContext args) throws WorldEditException {
         int page;
         int offset;
         int count = 0;
@@ -76,17 +90,23 @@ public class BiomeCommands {
             offset = (page - 1) * 19;
         }
 
-        List<BiomeType> biomes = worldEdit.getServer().getBiomes().all();
+        BiomeRegistry biomeRegistry = player.getWorld().getWorldData().getBiomeRegistry();
+        List<BaseBiome> biomes = biomeRegistry.getBiomes();
         int totalPages = biomes.size() / 19 + 1;
-        actor.print("Available Biomes (page " + page + "/" + totalPages + ") :");
+        player.print("Available Biomes (page " + page + "/" + totalPages + ") :");
-        for (BiomeType biome : biomes) {
+        for (BaseBiome biome : biomes) {
             if (offset > 0) {
                 offset--;
             } else {
-                actor.print(" " + biome.getName());
+                BiomeData data = biomeRegistry.getData(biome);
+                if (data != null) {
+                    player.print(" " + data.getName());
                     if (++count == 19) {
                         break;
                     }
+                } else {
+                    player.print(" <unknown #" + biome.getId() + ">");
+                }
             }
         }
     }
@@ -103,7 +123,11 @@ public class BiomeCommands {
         max = 0
     )
     @CommandPermissions("worldedit.biome.info")
-    public void biomeInfo(CommandContext args, Player player, LocalSession session) throws WorldEditException {
+    public void biomeInfo(Player player, LocalSession session, CommandContext args) throws WorldEditException {
+        BiomeRegistry biomeRegistry = player.getWorld().getWorldData().getBiomeRegistry();
+        Set<BaseBiome> biomes = new HashSet<BaseBiome>();
+        String qualifier;
+
         if (args.hasFlag('t')) {
             Vector blockPosition = player.getBlockTrace(300);
             if (blockPosition == null) {
@@ -111,15 +135,18 @@ public class BiomeCommands {
                 return;
             }
 
-            BiomeType biome = player.getWorld().getBiome(blockPosition.toVector2D());
+            BaseBiome biome = player.getWorld().getBiome(blockPosition.toVector2D());
-            player.print("Biome: " + biome.getName());
+            biomes.add(biome);
+
+            qualifier = "at line of sight point";
         } else if (args.hasFlag('p')) {
-            BiomeType biome = player.getWorld().getBiome(player.getPosition().toVector2D());
+            BaseBiome biome = player.getWorld().getBiome(player.getPosition().toVector2D());
-            player.print("Biome: " + biome.getName());
+            biomes.add(biome);
+
+            qualifier = "at your position";
         } else {
             World world = player.getWorld();
             Region region = session.getSelection(world);
-            Set<BiomeType> biomes = new HashSet<BiomeType>();
 
             if (region instanceof FlatRegion) {
                 for (Vector2D pt : ((FlatRegion) region).asFlatRegion()) {
@@ -131,9 +158,16 @@ public class BiomeCommands {
                 }
             }
 
-            player.print("Biomes:");
+            qualifier = "in your selection";
-            for (BiomeType biome : biomes) {
+        }
-                player.print(" " + biome.getName());
+
+        player.print(biomes.size() != 1 ? "Biomes " + qualifier + ":" : "Biome " + qualifier + ":");
+        for (BaseBiome biome : biomes) {
+            BiomeData data = biomeRegistry.getData(biome);
+            if (data != null) {
+                player.print(" " + data.getName());
+            } else {
+                player.print(" <unknown #" + biome.getId() + ">");
             }
         }
     }
@@ -146,64 +180,30 @@ public class BiomeCommands {
             help =
                     "Set the biome of the region.\n" +
                     "By default use all the blocks contained in your selection.\n" +
-                            "-p use the block you are currently in",
+                    "-p use the block you are currently in"
-            min = 1,
-            max = 1
     )
     @Logging(REGION)
     @CommandPermissions("worldedit.biome.set")
-    public void setBiome(CommandContext args, Player player, LocalSession session, EditSession editSession) throws WorldEditException {
+    public void setBiome(Player player, LocalSession session, EditSession editSession, BaseBiome target, @Switch('p') boolean atPosition) throws WorldEditException {
-        final BiomeType target = worldEdit.getServer().getBiomes().get(args.getString(0));
-        if (target == null) {
-            player.printError("Biome '" + args.getString(0) + "' does not exist!");
-            return;
-        }
-
-        Mask mask = editSession.getMask();
-        BiomeTypeMask biomeMask = null;
-        boolean inverted = false;
-        if (mask instanceof BiomeTypeMask) {
-            biomeMask = (BiomeTypeMask) mask;
-        } else if (mask instanceof InvertedMask && ((InvertedMask) mask).getInvertedMask() instanceof BiomeTypeMask) {
-            inverted = true;
-            biomeMask = (BiomeTypeMask) ((InvertedMask) mask).getInvertedMask();
-        }
-
-        if (args.hasFlag('p')) {
-            Vector2D pos = player.getPosition().toVector2D();
-            if (biomeMask == null || (biomeMask.matches2D(editSession, pos) ^ inverted)) {
-                player.getWorld().setBiome(pos, target);
-                player.print("Biome changed to " + target.getName() + " at your current location.");
-            } else {
-                player.print("Your global mask doesn't match this biome. Type //gmask to disable it.");
-            }
-        } else {
-            int affected = 0;
         World world = player.getWorld();
-            Region region = session.getSelection(world);
+        Region region;
+        Mask mask = editSession.getMask();
+        Mask2D mask2d = mask != null ? mask.toMask2D() : null;
 
-            if (region instanceof FlatRegion) {
+        if (atPosition) {
-                for (Vector2D pt : ((FlatRegion) region).asFlatRegion()) {
+            region = new CuboidRegion(player.getPosition(), player.getPosition());
-                    if (biomeMask == null || (biomeMask.matches2D(editSession, pt) ^ inverted)) {
-                        world.setBiome(pt, target);
-                        ++affected;
-                    }
-                }
         } else {
-                HashSet<Long> alreadyVisited = new HashSet<Long>();
+            region = session.getSelection(world);
-                for (Vector pt : region) {
-                    if (!alreadyVisited.contains((long)pt.getBlockX() << 32 | pt.getBlockZ())) {
-                        alreadyVisited.add(((long)pt.getBlockX() << 32 | pt.getBlockZ()));
-                        if (biomeMask == null || (biomeMask.matches(editSession, pt) ^ inverted)) {
-                            world.setBiome(pt.toVector2D(), target);
-                            ++affected;
-                        }
-                    }
-                }
         }
 
-            player.print("Biome changed to " + target.getName() + ". " + affected + " columns affected.");
+        FlatRegionFunction replace = new BiomeReplace(editSession, target);
+        if (mask2d != null) {
+            replace = new FlatRegionMaskingFilter(mask2d, replace);
         }
+        FlatRegionVisitor visitor = new FlatRegionVisitor(Regions.asFlatRegion(region), replace);
+        Operations.completeLegacy(visitor);
+
+        player.print("Biomes were changed in " + visitor.getAffected() + " columns. You may have to rejoin your game (or close and reopen your world) to see a change.");
     }
 
 }

src/main/java/com/sk89q/worldedit/command/GenerationCommands.java

@@ -22,7 +22,11 @@ package com.sk89q.worldedit.command;
 import com.sk89q.minecraft.util.commands.Command;
 import com.sk89q.minecraft.util.commands.CommandPermissions;
 import com.sk89q.minecraft.util.commands.Logging;
-import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.function.pattern.Pattern;
 import com.sk89q.worldedit.function.pattern.Patterns;
@@ -35,6 +39,7 @@ import com.sk89q.worldedit.util.command.binding.Range;
 import com.sk89q.worldedit.util.command.binding.Switch;
 import com.sk89q.worldedit.util.command.binding.Text;
 import com.sk89q.worldedit.util.command.parametric.Optional;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.sk89q.minecraft.util.commands.Logging.LogMode.*;
@@ -332,7 +337,7 @@ public class GenerationCommands {
     @Logging(ALL)
     public void generateBiome(Player player, LocalSession session, EditSession editSession,
                               @Selection Region region,
-                              BiomeType target,
+                              BaseBiome target,
                               @Text String expression,
                               @Switch('h') boolean hollow,
                               @Switch('r') boolean useRawCoords,
@@ -368,7 +373,7 @@ public class GenerationCommands {
         try {
             final int affected = editSession.makeBiomeShape(region, zero, unit, target, expression, hollow);
             player.findFreePosition();
-            player.print("Biome changed to " + target.getName() + ". " + affected + " columns affected.");
+            player.print("" + affected + " columns affected.");
         } catch (ExpressionException e) {
             player.printError(e.getMessage());
         }

src/main/java/com/sk89q/worldedit/extension/factory/DefaultMaskParser.java

@@ -19,17 +19,30 @@
 
 package com.sk89q.worldedit.extension.factory;
 
-import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.IncompleteRegionException;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.input.InputParseException;
 import com.sk89q.worldedit.extension.input.NoMatchException;
 import com.sk89q.worldedit.extension.input.ParserContext;
 import com.sk89q.worldedit.extent.Extent;
-import com.sk89q.worldedit.function.mask.*;
+import com.sk89q.worldedit.function.mask.BiomeMask2D;
+import com.sk89q.worldedit.function.mask.BlockMask;
+import com.sk89q.worldedit.function.mask.ExistingBlockMask;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.MaskIntersection;
+import com.sk89q.worldedit.function.mask.Masks;
+import com.sk89q.worldedit.function.mask.NoiseFilter;
+import com.sk89q.worldedit.function.mask.OffsetMask;
+import com.sk89q.worldedit.function.mask.RegionMask;
+import com.sk89q.worldedit.function.mask.SolidBlockMask;
 import com.sk89q.worldedit.internal.registry.InputParser;
-import com.sk89q.worldedit.masks.BiomeTypeMask;
 import com.sk89q.worldedit.math.noise.RandomNoise;
 import com.sk89q.worldedit.session.request.Request;
 import com.sk89q.worldedit.session.request.RequestSelection;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.Biomes;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
 
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -109,18 +122,19 @@ class DefaultMaskParser extends InputParser<Mask> {
                 return new MaskIntersection(offsetMask, Masks.negate(submask));
 
             case '$':
-                Set<BiomeType> biomes = new HashSet<BiomeType>();
+                Set<BaseBiome> biomes = new HashSet<BaseBiome>();
                 String[] biomesList = component.substring(1).split(",");
+                BiomeRegistry biomeRegistry = context.requireWorld().getWorldData().getBiomeRegistry();
+                List<BaseBiome> knownBiomes = biomeRegistry.getBiomes();
                 for (String biomeName : biomesList) {
-                    try {
+                    BaseBiome biome = Biomes.findBiomeByName(knownBiomes, biomeName, biomeRegistry);
-                        BiomeType biome = worldEdit.getServer().getBiomes().get(biomeName);
+                    if (biome == null) {
-                        biomes.add(biome);
-                    } catch (UnknownBiomeTypeException e) {
                         throw new InputParseException("Unknown biome '" + biomeName + "'");
                     }
+                    biomes.add(biome);
                 }
 
-                return Masks.wrap(new BiomeTypeMask(biomes));
+                return Masks.asMask(new BiomeMask2D(context.requireExtent(), biomes));
 
             case '%':
                 int i = Integer.parseInt(component.substring(1));

src/main/java/com/sk89q/worldedit/extension/platform/Platform.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.extension.platform;
 
-import com.sk89q.worldedit.BiomeTypes;
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.util.command.Dispatcher;
@@ -58,13 +57,6 @@ public interface Platform {
      */
     void reload();
 
-    /**
-     * Returns all available biomes.
-     *
-     * @return an object containing all the biomes
-     */
-    BiomeTypes getBiomes();
-
     /**
      * Schedules the given <code>task</code> to be invoked once every <code>period</code> ticks
      * after an initial delay of <code>delay</code> ticks.

src/main/java/com/sk89q/worldedit/extent/AbstractDelegateExtent.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.extent;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.entity.BaseEntity;
@@ -28,6 +29,7 @@ import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.operation.OperationQueue;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import javax.annotation.Nullable;
 
@@ -92,6 +94,16 @@ public abstract class AbstractDelegateExtent implements Extent {
         return extent.getEntities(region);
     }
 
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        return extent.getBiome(position);
+    }
+
+    @Override
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        return extent.setBiome(position, biome);
+    }
+
     @Override
     public Vector getMinimumPoint() {
         return extent.getMinimumPoint();

src/main/java/com/sk89q/worldedit/extent/InputExtent.java

@@ -20,9 +20,10 @@
 package com.sk89q.worldedit.extent;
 
 import com.sk89q.worldedit.Vector;
-import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.function.pattern.Pattern;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 /**
  * Provides the current state of blocks, entities, and so on.
@@ -74,4 +75,15 @@ public interface InputExtent {
      */
     BaseBlock getLazyBlock(Vector position);
 
+    /**
+     * Get the biome at the given location.
+     *
+     * <p>If there is no biome available, then the ocean biome should be
+     * returned.</p>
+     *
+     * @param position the (x, z) location to check the biome at
+     * @return the biome at the location
+     */
+    BaseBiome getBiome(Vector2D position);
+
 }

src/main/java/com/sk89q/worldedit/extent/NullExtent.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.extent;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.entity.BaseEntity;
@@ -27,6 +28,7 @@ import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import javax.annotation.Nullable;
 import java.util.Collections;
@@ -76,11 +78,22 @@ public class NullExtent implements Extent {
         return new BaseBlock(0);
     }
 
+    @Nullable
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        return null;
+    }
+
     @Override
     public boolean setBlock(Vector position, BaseBlock block) throws WorldEditException {
         return false;
     }
 
+    @Override
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        return false;
+    }
+
     @Nullable
     @Override
     public Operation commit() {

src/main/java/com/sk89q/worldedit/extent/OutputExtent.java

@@ -20,9 +20,11 @@
 package com.sk89q.worldedit.extent;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.function.operation.Operation;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import javax.annotation.Nullable;
 
@@ -49,6 +51,15 @@ public interface OutputExtent {
      */
     boolean setBlock(Vector position, BaseBlock block) throws WorldEditException;
 
+    /**
+     * Set the biome.
+     *
+     * @param position the (x, z) location to set the biome at
+     * @param biome the biome to set to
+     * @return true if the biome was successfully set (return value may not be accurate)
+     */
+    boolean setBiome(Vector2D position, BaseBiome biome);
+
     /**
      * Return an {@link Operation} that should be called to tie up loose ends
      * (such as to commit changes in a buffer).

src/main/java/com/sk89q/worldedit/extent/clipboard/BlockArrayClipboard.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.extent.clipboard;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.BlockID;
@@ -28,6 +29,7 @@ import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 import javax.annotation.Nullable;
 import java.util.ArrayList;
@@ -146,6 +148,16 @@ public class BlockArrayClipboard implements Clipboard {
         }
     }
 
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        return new BaseBiome(0);
+    }
+
+    @Override
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        return false;
+    }
+
     @Nullable
     @Override
     public Operation commit() {

src/main/java/com/sk89q/worldedit/function/biome/BiomeReplace.java

@@ -0,0 +1,56 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.biome;
+
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.FlatRegionFunction;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Replaces the biome at the locations that this function is applied to.
+ */
+public class BiomeReplace implements FlatRegionFunction {
+
+    private final Extent extent;
+    private BaseBiome biome;
+
+    /**
+     * Create a new instance.
+     *
+     * @param extent an extent
+     * @param biome a biome
+     */
+    public BiomeReplace(Extent extent, BaseBiome biome) {
+        checkNotNull(extent);
+        checkNotNull(biome);
+        this.extent = extent;
+        this.biome = biome;
+    }
+
+    @Override
+    public boolean apply(Vector2D position) throws WorldEditException {
+        return extent.setBiome(position, biome);
+    }
+
+}

src/main/java/com/sk89q/worldedit/function/mask/BiomeMask2D.java

@@ -0,0 +1,98 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.mask;
+
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Tests true if the biome at applied points is the same as the one given.
+ */
+public class BiomeMask2D extends AbstractMask2D {
+
+    private final Extent extent;
+    private final Set<BaseBiome> biomes = new HashSet<BaseBiome>();
+
+    /**
+     * Create a new biome mask.
+     *
+     * @param extent the extent
+     * @param biomes a list of biomes to match
+     */
+    public BiomeMask2D(Extent extent, Collection<BaseBiome> biomes) {
+        checkNotNull(extent);
+        checkNotNull(biomes);
+        this.extent = extent;
+        this.biomes.addAll(biomes);
+    }
+
+    /**
+     * Create a new biome mask.
+     *
+     * @param extent the extent
+     * @param biome an array of biomes to match
+     */
+    public BiomeMask2D(Extent extent, BaseBiome... biome) {
+        this(extent, Arrays.asList(checkNotNull(biome)));
+    }
+
+    /**
+     * Add the given biomes to the list of criteria.
+     *
+     * @param biomes a list of biomes
+     */
+    public void add(Collection<BaseBiome> biomes) {
+        checkNotNull(biomes);
+        this.biomes.addAll(biomes);
+    }
+
+    /**
+     * Add the given biomes to the list of criteria.
+     *
+     * @param biome an array of biomes
+     */
+    public void add(BaseBiome... biome) {
+        add(Arrays.asList(checkNotNull(biome)));
+    }
+
+    /**
+     * Get the list of biomes that are tested with.
+     *
+     * @return a list of biomes
+     */
+    public Collection<BaseBiome> getBiomes() {
+        return biomes;
+    }
+
+    @Override
+    public boolean test(Vector2D vector) {
+        BaseBiome biome = extent.getBiome(vector);
+        return biomes.contains(biome);
+    }
+
+}

src/main/java/com/sk89q/worldedit/function/mask/BlockMask.java

@@ -23,6 +23,7 @@ import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BaseBlock;
 
+import javax.annotation.Nullable;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
@@ -96,4 +97,11 @@ public class BlockMask extends AbstractExtentMask {
         BaseBlock block = getExtent().getBlock(vector);
         return blocks.contains(block) || blocks.contains(new BaseBlock(block.getType(), -1));
     }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/BoundedHeightMask.java

@@ -21,6 +21,8 @@ package com.sk89q.worldedit.function.mask;
 
 import com.sk89q.worldedit.Vector;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkArgument;
 
 /**
@@ -49,4 +51,10 @@ public class BoundedHeightMask extends AbstractMask {
         return vector.getY() >= minY && vector.getY() <= maxY;
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/ExistingBlockMask.java

@@ -23,6 +23,8 @@ import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BlockID;
 
+import javax.annotation.Nullable;
+
 /**
  * A mask that returns true whenever the block at the location is not
  * an air block (it contains some other block).
@@ -43,4 +45,10 @@ public class ExistingBlockMask extends AbstractExtentMask {
         return getExtent().getLazyBlock(vector).getType() != BlockID.AIR;
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/Mask.java

@@ -21,6 +21,8 @@ package com.sk89q.worldedit.function.mask;
 
 import com.sk89q.worldedit.Vector;
 
+import javax.annotation.Nullable;
+
 /**
  * Tests whether a given vector meets a criteria.
  */
@@ -34,4 +36,12 @@ public interface Mask {
      */
     boolean test(Vector vector);
 
+    /**
+     * Get the 2D version of this mask if one exists.
+     *
+     * @return a 2D mask version or {@code null} if this mask can't be 2D
+     */
+    @Nullable
+    Mask2D toMask2D();
+
 }

src/main/java/com/sk89q/worldedit/function/mask/MaskIntersection.java

@@ -21,9 +21,12 @@ package com.sk89q.worldedit.function.mask;
 
 import com.sk89q.worldedit.Vector;
 
+import javax.annotation.Nullable;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 import static com.google.common.base.Preconditions.checkNotNull;
@@ -86,7 +89,7 @@ public class MaskIntersection extends AbstractMask {
 
     @Override
     public boolean test(Vector vector) {
-        if (masks.size() == 0) {
+        if (masks.isEmpty()) {
             return false;
         }
 
@@ -99,4 +102,19 @@ public class MaskIntersection extends AbstractMask {
         return true;
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        List<Mask2D> mask2dList = new ArrayList<Mask2D>();
+        for (Mask mask : masks) {
+            Mask2D mask2d = mask.toMask2D();
+            if (mask2d != null) {
+                mask2dList.add(mask2d);
+            } else {
+                return null;
+            }
+        }
+        return new MaskIntersection2D(mask2dList);
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/MaskIntersection2D.java

@@ -0,0 +1,100 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.mask;
+
+import com.sk89q.worldedit.Vector2D;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Tests true if all contained masks test true.
+ */
+public class MaskIntersection2D implements Mask2D {
+
+    private final Set<Mask2D> masks = new HashSet<Mask2D>();
+
+    /**
+     * Create a new intersection.
+     *
+     * @param masks a list of masks
+     */
+    public MaskIntersection2D(Collection<Mask2D> masks) {
+        checkNotNull(masks);
+        this.masks.addAll(masks);
+    }
+
+    /**
+     * Create a new intersection.
+     *
+     * @param mask a list of masks
+     */
+    public MaskIntersection2D(Mask2D... mask) {
+        this(Arrays.asList(checkNotNull(mask)));
+    }
+
+    /**
+     * Add some masks to the list.
+     *
+     * @param masks the masks
+     */
+    public void add(Collection<Mask2D> masks) {
+        checkNotNull(masks);
+        this.masks.addAll(masks);
+    }
+
+    /**
+     * Add some masks to the list.
+     *
+     * @param mask the masks
+     */
+    public void add(Mask2D... mask) {
+        add(Arrays.asList(checkNotNull(mask)));
+    }
+
+    /**
+     * Get the masks that are tested with.
+     *
+     * @return the masks
+     */
+    public Collection<Mask2D> getMasks() {
+        return masks;
+    }
+
+    @Override
+    public boolean test(Vector2D vector) {
+        if (masks.isEmpty()) {
+            return false;
+        }
+
+        for (Mask2D mask : masks) {
+            if (!mask.test(vector)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+}

src/main/java/com/sk89q/worldedit/function/mask/MaskUnion.java

@@ -21,7 +21,10 @@ package com.sk89q.worldedit.function.mask;
 
 import com.sk89q.worldedit.Vector;
 
+import javax.annotation.Nullable;
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.List;
 
 /**
  * Combines several masks and requires that one or more masks return true
@@ -61,4 +64,18 @@ public class MaskUnion extends MaskIntersection {
         return false;
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        List<Mask2D> mask2dList = new ArrayList<Mask2D>();
+        for (Mask mask : getMasks()) {
+            Mask2D mask2d = mask.toMask2D();
+            if (mask2d != null) {
+                mask2dList.add(mask2d);
+            } else {
+                return null;
+            }
+        }
+        return new MaskUnion2D(mask2dList);
+    }
 }

src/main/java/com/sk89q/worldedit/function/mask/MaskUnion2D.java

@@ -17,34 +17,46 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit.masks;
+package com.sk89q.worldedit.function.mask;
 
-import java.util.HashSet;
-import java.util.Set;
-
-import com.sk89q.worldedit.BiomeType;
-import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;
 
-public class BiomeTypeMask extends AbstractMask {
+import java.util.Collection;
-    private final Set<BiomeType> biomes;
 
-    public BiomeTypeMask() {
+/**
-        this(new HashSet<BiomeType>());
+ * Tests true if any contained mask is true, even if it just one.
+ */
+public class MaskUnion2D extends MaskIntersection2D {
+
+    /**
+     * Create a new union.
+     *
+     * @param masks a list of masks
+     */
+    public MaskUnion2D(Collection<Mask2D> masks) {
+        super(masks);
     }
 
-    public BiomeTypeMask(Set<BiomeType> biomes) {
+    /**
-        this.biomes = biomes;
+     * Create a new union.
-    }
+     *
-
+     * @param mask a list of masks
-    public boolean matches2D(EditSession editSession, Vector2D pos) {
+     */
-        BiomeType biome = editSession.getWorld().getBiome(pos);
+    public MaskUnion2D(Mask2D... mask) {
-        return biomes.contains(biome);
+        super(mask);
     }
 
     @Override
-    public boolean matches(EditSession editSession, Vector pos) {
+    public boolean test(Vector2D vector) {
-        return matches2D(editSession, pos.toVector2D());
+        Collection<Mask2D> masks = getMasks();
+
+        for (Mask2D mask : masks) {
+            if (mask.test(vector)) {
+                return true;
             }
         }
+
+        return false;
+    }
+
+}

src/main/java/com/sk89q/worldedit/function/mask/Masks.java

@@ -22,6 +22,8 @@ package com.sk89q.worldedit.function.mask;
 import com.sk89q.worldedit.*;
 import com.sk89q.worldedit.session.request.Request;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
@@ -29,6 +31,9 @@ import static com.google.common.base.Preconditions.checkNotNull;
  */
 public final class Masks {
 
+    private static final AlwaysTrue ALWAYS_TRUE = new AlwaysTrue();
+    private static final AlwaysFalse ALWAYS_FALSE = new AlwaysFalse();
+
     private Masks() {
     }
 
@@ -38,12 +43,7 @@ public final class Masks {
      * @return a mask
      */
     public static Mask alwaysTrue() {
-        return new AbstractMask() {
+        return ALWAYS_TRUE;
-            @Override
-            public boolean test(Vector vector) {
-                return true;
-            }
-        };
     }
 
     /**
@@ -52,12 +52,7 @@ public final class Masks {
      * @return a mask
      */
     public static Mask2D alwaysTrue2D() {
-        return new AbstractMask2D() {
+        return ALWAYS_TRUE;
-            @Override
-            public boolean test(Vector2D vector) {
-                return true;
-            }
-        };
     }
 
     /**
@@ -67,12 +62,29 @@ public final class Masks {
      * @return a new mask
      */
     public static Mask negate(final Mask mask) {
+        if (mask instanceof AlwaysTrue) {
+            return ALWAYS_FALSE;
+        } else if (mask instanceof AlwaysFalse) {
+            return ALWAYS_TRUE;
+        }
+
         checkNotNull(mask);
         return new AbstractMask() {
             @Override
             public boolean test(Vector vector) {
                 return !mask.test(vector);
             }
+
+            @Nullable
+            @Override
+            public Mask2D toMask2D() {
+                Mask2D mask2d = mask.toMask2D();
+                if (mask2d != null) {
+                    return negate(mask2d);
+                } else {
+                    return null;
+                }
+            }
         };
     }
 
@@ -83,6 +95,12 @@ public final class Masks {
      * @return a new mask
      */
     public static Mask2D negate(final Mask2D mask) {
+        if (mask instanceof AlwaysTrue) {
+            return ALWAYS_FALSE;
+        } else if (mask instanceof AlwaysFalse) {
+            return ALWAYS_TRUE;
+        }
+
         checkNotNull(mask);
         return new AbstractMask2D() {
             @Override
@@ -92,6 +110,27 @@ public final class Masks {
         };
     }
 
+    /**
+     * Return a 3-dimensional version of a 2D mask.
+     *
+     * @param mask the mask to make 3D
+     * @return a 3D mask
+     */
+    public static Mask asMask(final Mask2D mask) {
+        return new AbstractMask() {
+            @Override
+            public boolean test(Vector vector) {
+                return mask.test(vector.toVector2D());
+            }
+
+            @Nullable
+            @Override
+            public Mask2D toMask2D() {
+                return mask;
+            }
+        };
+    }
+
     /**
      * Wrap an old-style mask and convert it to a new mask.
      * </p>
@@ -113,6 +152,12 @@ public final class Masks {
             public boolean test(Vector vector) {
                 return mask.matches(editSession, vector);
             }
+
+            @Nullable
+            @Override
+            public Mask2D toMask2D() {
+                return null;
+            }
         };
     }
 
@@ -135,6 +180,12 @@ public final class Masks {
                 EditSession editSession = Request.request().getEditSession();
                 return editSession != null && mask.matches(editSession, vector);
             }
+
+            @Nullable
+            @Override
+            public Mask2D toMask2D() {
+                return null;
+            }
         };
     }
 
@@ -156,4 +207,40 @@ public final class Masks {
         };
     }
 
+    private static class AlwaysTrue implements Mask, Mask2D {
+        @Override
+        public boolean test(Vector vector) {
+            return true;
+        }
+
+        @Override
+        public boolean test(Vector2D vector) {
+            return true;
+        }
+
+        @Nullable
+        @Override
+        public Mask2D toMask2D() {
+            return this;
+        }
+    }
+
+    private static class AlwaysFalse implements Mask, Mask2D {
+        @Override
+        public boolean test(Vector vector) {
+            return false;
+        }
+
+        @Override
+        public boolean test(Vector2D vector) {
+            return false;
+        }
+
+        @Nullable
+        @Override
+        public Mask2D toMask2D() {
+            return this;
+        }
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/NoiseFilter.java

@@ -22,6 +22,8 @@ package com.sk89q.worldedit.function.mask;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.math.noise.NoiseGenerator;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -89,4 +91,10 @@ public class NoiseFilter extends AbstractMask {
         return noiseGenerator.noise(vector) <= density;
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return new NoiseFilter2D(getNoiseGenerator(), getDensity());
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/OffsetMask.java

@@ -21,10 +21,13 @@ package com.sk89q.worldedit.function.mask;
 
 import com.sk89q.worldedit.Vector;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
- * Checks whether the provided mask tests true for an offset position.
+ * Checks whether another mask tests true for a position that is offset
+ * a given vector.
  */
 public class OffsetMask extends AbstractMask {
 
@@ -87,4 +90,15 @@ public class OffsetMask extends AbstractMask {
         return getMask().test(vector.add(offset));
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        Mask2D childMask = getMask().toMask2D();
+        if (childMask != null) {
+            return new OffsetMask2D(childMask, getOffset().toVector2D());
+        } else {
+            return null;
+        }
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/OffsetMask2D.java

@@ -0,0 +1,91 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.function.mask;
+
+import com.sk89q.worldedit.Vector2D;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Checks whether another mask tests true for a position that is offset
+ * a given vector.
+ */
+public class OffsetMask2D extends AbstractMask2D {
+
+    private Mask2D mask;
+    private Vector2D offset;
+
+    /**
+     * Create a new instance.
+     *
+     * @param mask the mask
+     * @param offset the offset
+     */
+    public OffsetMask2D(Mask2D mask, Vector2D offset) {
+        checkNotNull(mask);
+        checkNotNull(offset);
+        this.mask = mask;
+        this.offset = offset;
+    }
+
+    /**
+     * Get the mask.
+     *
+     * @return the mask
+     */
+    public Mask2D getMask() {
+        return mask;
+    }
+
+    /**
+     * Set the mask.
+     *
+     * @param mask the mask
+     */
+    public void setMask(Mask2D mask) {
+        checkNotNull(mask);
+        this.mask = mask;
+    }
+
+    /**
+     * Get the offset.
+     *
+     * @return the offset
+     */
+    public Vector2D getOffset() {
+        return offset;
+    }
+
+    /**
+     * Set the offset.
+     *
+     * @param offset the offset
+     */
+    public void setOffset(Vector2D offset) {
+        checkNotNull(offset);
+        this.offset = offset;
+    }
+
+    @Override
+    public boolean test(Vector2D vector) {
+        return getMask().test(vector.add(offset));
+    }
+
+}

src/main/java/com/sk89q/worldedit/function/mask/RegionMask.java

@@ -22,6 +22,8 @@ package com.sk89q.worldedit.function.mask;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.regions.Region;
 
+import javax.annotation.Nullable;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
@@ -64,4 +66,10 @@ public class RegionMask extends AbstractMask {
         return region.contains(vector);
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+
 }

src/main/java/com/sk89q/worldedit/function/mask/SolidBlockMask.java

@@ -24,6 +24,8 @@ import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BlockType;
 
+import javax.annotation.Nullable;
+
 public class SolidBlockMask extends AbstractExtentMask {
 
     public SolidBlockMask(Extent extent) {
@@ -37,4 +39,10 @@ public class SolidBlockMask extends AbstractExtentMask {
         return !BlockType.canPassThrough(lazyBlock.getType(), lazyBlock.getData());
     }
 
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+
 }

src/main/java/com/sk89q/worldedit/internal/LocalWorldAdapter.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.internal;
 
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.BlockVector2D;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.LocalWorld;
@@ -37,6 +36,7 @@ import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 import com.sk89q.worldedit.world.registry.WorldData;
 
 import javax.annotation.Nullable;
@@ -109,13 +109,13 @@ public class LocalWorldAdapter extends LocalWorld {
     }
 
     @Override
-    public BiomeType getBiome(Vector2D position) {
+    public BaseBiome getBiome(Vector2D position) {
         return world.getBiome(position);
     }
 
     @Override
-    public void setBiome(Vector2D position, BiomeType biome) {
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
-        world.setBiome(position, biome);
+        return world.setBiome(position, biome);
     }
 
     @Override

src/main/java/com/sk89q/worldedit/internal/ServerInterfaceAdapter.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.internal;
 
-import com.sk89q.worldedit.BiomeTypes;
 import com.sk89q.worldedit.LocalConfiguration;
 import com.sk89q.worldedit.ServerInterface;
 import com.sk89q.worldedit.entity.Player;
@@ -67,11 +66,6 @@ public class ServerInterfaceAdapter extends ServerInterface {
         platform.reload();
     }
 
-    @Override
-    public BiomeTypes getBiomes() {
-        return platform.getBiomes();
-    }
-
     @Override
     public int schedule(long delay, long period, Runnable task) {
         return platform.schedule(delay, period, task);

src/main/java/com/sk89q/worldedit/internal/command/WorldEditBinding.java

@@ -19,7 +19,6 @@
 
 package com.sk89q.worldedit.internal.command;
 
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.IncompleteRegionException;
 import com.sk89q.worldedit.LocalSession;
@@ -47,8 +46,12 @@ import com.sk89q.worldedit.util.command.parametric.BindingHelper;
 import com.sk89q.worldedit.util.command.parametric.BindingMatch;
 import com.sk89q.worldedit.util.command.parametric.ParameterException;
 import com.sk89q.worldedit.world.World;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.Biomes;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
 
 import java.util.Arrays;
+import java.util.List;
 
 /**
  * Binds standard WorldEdit classes such as {@link Player} and {@link LocalSession}.
@@ -288,25 +291,40 @@ public class WorldEditBinding extends BindingHelper {
     }
 
     /**
-     * Gets an {@link BiomeType} from a {@link ArgumentStack}.
+     * Gets an {@link BaseBiome} from a {@link ArgumentStack}.
      *
      * @param context the context
      * @return a pattern
      * @throws ParameterException on error
      * @throws WorldEditException on error
      */
-    @BindingMatch(type = BiomeType.class,
+    @BindingMatch(type = BaseBiome.class,
                   behavior = BindingBehavior.CONSUMES,
                   consumedCount = 1)
-    public BiomeType getBiomeType(ArgumentStack context) throws ParameterException, WorldEditException {
+    public BaseBiome getBiomeType(ArgumentStack context) throws ParameterException, WorldEditException {
         String input = context.next();
         if (input != null) {
-            BiomeType type = worldEdit.getServer().getBiomes().get(input);
+            Actor actor = context.getContext().getLocals().get(Actor.class);
-            if (type != null) {
+            World world;
-                return type;
+            if (actor instanceof Entity) {
+                Extent extent = ((Entity) actor).getExtent();
+                if (extent instanceof World) {
+                    world = (World) extent;
+                } else {
+                    throw new ParameterException("A world is required.");
+                }
+            } else {
+                throw new ParameterException("An entity is required.");
+            }
+
+            BiomeRegistry biomeRegistry = world.getWorldData().getBiomeRegistry();
+            List<BaseBiome> knownBiomes = biomeRegistry.getBiomes();
+            BaseBiome biome = Biomes.findBiomeByName(knownBiomes, input, biomeRegistry);
+            if (biome != null) {
+                return biome;
             } else {
                 throw new ParameterException(
-                        String.format("Can't recognize biome type '%s' -- use //biomelist to list available types", input));
+                        String.format("Can't recognize biome type '%s' -- use /biomelist to list available types", input));
             }
         } else {
             throw new ParameterException(

src/main/java/com/sk89q/worldedit/regions/shape/ArbitraryBiomeShape.java

@@ -19,12 +19,12 @@
 
 package com.sk89q.worldedit.regions.shape;
 
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.FlatRegion;
 import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 
 /**
  * Generates solid and hollow shapes according to materials returned by the
@@ -58,7 +58,7 @@ public abstract class ArbitraryBiomeShape {
         cacheSizeX = (int) (max.getX() - cacheOffsetX + 2);
         cacheSizeZ = (int) (max.getZ() - cacheOffsetZ + 2);
 
-        cache = new BiomeType[cacheSizeX * cacheSizeZ];
+        cache = new BaseBiome[cacheSizeX * cacheSizeZ];
     }
 
     protected Iterable<Vector2D> getExtent() {
@@ -72,24 +72,24 @@ public abstract class ArbitraryBiomeShape {
      * OUTSIDE = outside
      * else = inside
      */
-    private final BiomeType[] cache;
+    private final BaseBiome[] cache;
 
     /**
      * Override this function to specify the shape to generate.
      *
      * @param x X coordinate to be queried
      * @param z Z coordinate to be queried
-     * @param defaultBiomeType The default biome for the current column.
+     * @param defaultBaseBiome The default biome for the current column.
      * @return material to place or null to not place anything.
      */
-    protected abstract BiomeType getBiome(int x, int z, BiomeType defaultBiomeType);
+    protected abstract BaseBiome getBiome(int x, int z, BaseBiome defaultBaseBiome);
 
-    private BiomeType getBiomeCached(int x, int z, BiomeType biomeType) {
+    private BaseBiome getBiomeCached(int x, int z, BaseBiome BaseBiome) {
         final int index = (z - cacheOffsetZ) + (x - cacheOffsetX) * cacheSizeZ;
 
-        final BiomeType cacheEntry = cache[index];
+        final BaseBiome cacheEntry = cache[index];
         if (cacheEntry == null) {// unknown, fetch material
-            final BiomeType material = getBiome(x, z, biomeType);
+            final BaseBiome material = getBiome(x, z, BaseBiome);
             if (material == null) {
                 // outside
                 cache[index] = OUTSIDE;
@@ -108,13 +108,13 @@ public abstract class ArbitraryBiomeShape {
         return cacheEntry;
     }
 
-    private boolean isInsideCached(int x, int z, BiomeType biomeType) {
+    private boolean isInsideCached(int x, int z, BaseBiome BaseBiome) {
         final int index = (z - cacheOffsetZ) + (x - cacheOffsetX) * cacheSizeZ;
 
-        final BiomeType cacheEntry = cache[index];
+        final BaseBiome cacheEntry = cache[index];
         if (cacheEntry == null) {
             // unknown block, meaning they must be outside the extent at this stage, but might still be inside the shape
-            return getBiomeCached(x, z, biomeType) != null;
+            return getBiomeCached(x, z, BaseBiome) != null;
         }
 
         return cacheEntry != OUTSIDE;
@@ -124,11 +124,11 @@ public abstract class ArbitraryBiomeShape {
      * Generates the shape.
      *
      * @param editSession The EditSession to use.
-     * @param biomeType The default biome type.
+     * @param BaseBiome The default biome type.
      * @param hollow Specifies whether to generate a hollow shape.
      * @return number of affected blocks.
      */
-    public int generate(EditSession editSession, BiomeType biomeType, boolean hollow) {
+    public int generate(EditSession editSession, BaseBiome BaseBiome, boolean hollow) {
         int affected = 0;
 
         for (Vector2D position : getExtent()) {
@@ -136,7 +136,7 @@ public abstract class ArbitraryBiomeShape {
             int z = position.getBlockZ();
 
             if (!hollow) {
-                final BiomeType material = getBiome(x, z, biomeType);
+                final BaseBiome material = getBiome(x, z, BaseBiome);
                 if (material != OUTSIDE) {
                     editSession.getWorld().setBiome(position, material);
                     ++affected;
@@ -145,26 +145,26 @@ public abstract class ArbitraryBiomeShape {
                 continue;
             }
 
-            final BiomeType material = getBiomeCached(x, z, biomeType);
+            final BaseBiome material = getBiomeCached(x, z, BaseBiome);
             if (material == null) {
                 continue;
             }
 
             boolean draw = false;
             do {
-                if (!isInsideCached(x + 1, z, biomeType)) {
+                if (!isInsideCached(x + 1, z, BaseBiome)) {
                     draw = true;
                     break;
                 }
-                if (!isInsideCached(x - 1, z, biomeType)) {
+                if (!isInsideCached(x - 1, z, BaseBiome)) {
                     draw = true;
                     break;
                 }
-                if (!isInsideCached(x, z + 1, biomeType)) {
+                if (!isInsideCached(x, z + 1, BaseBiome)) {
                     draw = true;
                     break;
                 }
-                if (!isInsideCached(x, z - 1, biomeType)) {
+                if (!isInsideCached(x, z - 1, BaseBiome)) {
                     draw = true;
                     break;
                 }
@@ -181,9 +181,15 @@ public abstract class ArbitraryBiomeShape {
         return affected;
     }
 
-    private static final BiomeType OUTSIDE = new BiomeType() {
+    private static final BaseBiome OUTSIDE = new BaseBiome(0) {
-        public String getName() {
+        @Override
-            throw new UnsupportedOperationException();
+        public int hashCode() {
+            return 0;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            return this == o;
         }
     };
 }

src/main/java/com/sk89q/worldedit/util/WeightedChoice.java

@@ -0,0 +1,118 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.util;
+
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Returns the best choice given a weighting function and a target weight.
+ *
+ * <p>A function must be supplied that returns a numeric score for each
+ * choice. The function can return null to mean that the choice should
+ * not be considered.</p>
+ *
+ * @param <T> the type of choice
+ */
+public class WeightedChoice<T> {
+
+    private final Function<T, ? extends Number> function;
+    private double target;
+    private double best;
+    private T current;
+
+    /**
+     * Create a new instance.
+     *
+     * @param function a function that assigns a score for each choice
+     * @param target the target score that the best choice should be closest to
+     */
+    public WeightedChoice(Function<T, ? extends Number> function, double target) {
+        checkNotNull(function);
+        this.function = function;
+        this.target = target;
+    }
+
+    /**
+     * Consider the given object.
+     *
+     * @param object the choice
+     */
+    public void consider(T object) {
+        checkNotNull(object);
+        Number value = checkNotNull(function.apply(object));
+        if (value != null) {
+            double distance = Math.abs(target - value.doubleValue());
+            if (current == null || distance <= best) {
+                best = distance;
+                current = object;
+            }
+        }
+    }
+
+    /**
+     * Get the best choice.
+     *
+     * @return the best choice
+     */
+    public Optional<Choice<T>> getChoice() {
+        if (current != null) {
+            return Optional.of(new Choice<T>(current, best));
+        } else {
+            return Optional.absent();
+        }
+    }
+
+    /**
+     * A tuple of choice and score.
+     *
+     * @param <T> the choice type
+     */
+    public static class Choice<T> {
+        private final T object;
+        private final double value;
+
+        private Choice(T object, double value) {
+            this.object = object;
+            this.value = value;
+        }
+
+        /**
+         * Get the chosen value.
+         *
+         * @return the value
+         */
+        public T getValue() {
+            return object;
+        }
+
+        /**
+         * Get the score.
+         *
+         * @return the score
+         */
+        public double getScore() {
+            return value;
+        }
+    }
+
+}

src/main/java/com/sk89q/worldedit/util/function/LevenshteinDistance.java

@@ -0,0 +1,192 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.util.function;
+
+import com.google.common.base.Function;
+
+import javax.annotation.Nullable;
+import java.util.regex.Pattern;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Provides a Levenshtein distance between a given string and each string
+ * that this function is applied to.
+ */
+public class LevenshteinDistance implements Function<String, Integer> {
+
+    public final static Pattern STANDARD_CHARS = Pattern.compile("[ _\\-]");
+
+    private final String baseString;
+    private final boolean caseSensitive;
+    private final Pattern replacePattern;
+
+    /**
+     * Create a new instance.
+     *
+     * @param baseString the string to compare to
+     * @param caseSensitive true to make case sensitive comparisons
+     */
+    public LevenshteinDistance(String baseString, boolean caseSensitive) {
+        this(baseString, caseSensitive, null);
+    }
+
+    /**
+     * Create a new instance.
+     *
+     * @param baseString the string to compare to
+     * @param caseSensitive true to make case sensitive comparisons
+     * @param replacePattern pattern to match characters to be removed in both the input and test strings (may be null)
+     */
+    public LevenshteinDistance(String baseString, boolean caseSensitive, @Nullable Pattern replacePattern) {
+        checkNotNull(baseString);
+        this.caseSensitive = caseSensitive;
+        this.replacePattern = replacePattern;
+        baseString = caseSensitive ? baseString : baseString.toLowerCase();
+        baseString = replacePattern != null ? replacePattern.matcher(baseString).replaceAll("") : baseString;
+        this.baseString = baseString;
+    }
+
+    @Nullable
+    @Override
+    public Integer apply(String input) {
+        if (input == null) {
+            return null;
+        }
+
+        if (replacePattern != null) {
+            input = replacePattern.matcher(input).replaceAll("");
+        }
+
+        if (caseSensitive) {
+            return distance(baseString, input);
+        } else {
+            return distance(baseString, input.toLowerCase());
+        }
+    }
+
+    /**
+     * <p>Find the Levenshtein distance between two Strings.</p>
+     *
+     * <p>This is the number of changes needed to change one String into
+     * another, where each change is a single character modification (deletion,
+     * insertion or substitution).</p>
+     *
+     * <p>The previous implementation of the Levenshtein distance algorithm
+     * was from <a href="http://www.merriampark.com/ld.htm">http://www.merriampark.com/ld.htm</a></p>
+     *
+     * <p>Chas Emerick has written an implementation in Java, which avoids an OutOfMemoryError
+     * which can occur when my Java implementation is used with very large strings.<br>
+     * This implementation of the Levenshtein distance algorithm
+     * is from <a href="http://www.merriampark.com/ldjava.htm">http://www.merriampark.com/ldjava.htm</a></p>
+     *
+     * <pre>
+     * distance(null, *)             = IllegalArgumentException
+     * distance(*, null)             = IllegalArgumentException
+     * distance("","")               = 0
+     * distance("","a")              = 1
+     * distance("aaapppp", "")       = 7
+     * distance("frog", "fog")       = 1
+     * distance("fly", "ant")        = 3
+     * distance("elephant", "hippo") = 7
+     * distance("hippo", "elephant") = 7
+     * distance("hippo", "zzzzzzzz") = 8
+     * distance("hello", "hallo")    = 1
+     * </pre>
+     *
+     * @param s  the first String, must not be null
+     * @param t  the second String, must not be null
+     * @return result distance
+     * @throws IllegalArgumentException if either String input <code>null</code>
+     */
+    public static int distance(String s, String t) {
+        if (s == null || t == null) {
+            throw new IllegalArgumentException("Strings must not be null");
+        }
+
+        /*
+         * The difference between this impl. and the previous is that, rather
+         * than creating and retaining a matrix of size s.length()+1 by
+         * t.length()+1, we maintain two single-dimensional arrays of length
+         * s.length()+1. The first, d, is the 'current working' distance array
+         * that maintains the newest distance cost counts as we iterate through
+         * the characters of String s. Each time we increment the index of
+         * String t we are comparing, d is copied to p, the second int[]. Doing
+         * so allows us to retain the previous cost counts as required by the
+         * algorithm (taking the minimum of the cost count to the left, up one,
+         * and diagonally up and to the left of the current cost count being
+         * calculated). (Note that the arrays aren't really copied anymore, just
+         * switched...this is clearly much better than cloning an array or doing
+         * a System.arraycopy() each time through the outer loop.)
+         *
+         * Effectively, the difference between the two implementations is this
+         * one does not cause an out of memory condition when calculating the LD
+         * over two very large strings.
+         */
+
+        int n = s.length(); // length of s
+        int m = t.length(); // length of t
+
+        if (n == 0) {
+            return m;
+        } else if (m == 0) {
+            return n;
+        }
+
+        int p[] = new int[n + 1]; // 'previous' cost array, horizontally
+        int d[] = new int[n + 1]; // cost array, horizontally
+        int _d[]; // placeholder to assist in swapping p and d
+
+        // indexes into strings s and t
+        int i; // iterates through s
+        int j; // iterates through t
+
+        char tj; // jth character of t
+
+        int cost; // cost
+
+        for (i = 0; i <= n; ++i) {
+            p[i] = i;
+        }
+
+        for (j = 1; j <= m; ++j) {
+            tj = t.charAt(j - 1);
+            d[0] = j;
+
+            for (i = 1; i <= n; ++i) {
+                cost = s.charAt(i - 1) == tj ? 0 : 1;
+                // minimum of cell to the left+1, to the top+1, diagonally left
+                // and up +cost
+                d[i] = Math.min(Math.min(d[i - 1] + 1, p[i] + 1), p[i - 1]
+                        + cost);
+            }
+
+            // copy current distance counts to 'previous row' distance counts
+            _d = p;
+            p = d;
+            d = _d;
+        }
+
+        // our last action in the above loop was to switch d and p, so p now
+        // actually has the most recent cost counts
+        return p[n];
+    }
+    
+}

src/main/java/com/sk89q/worldedit/world/NullWorld.java

@@ -19,7 +19,11 @@
 
 package com.sk89q.worldedit.world;
 
-import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.MaxChangedBlocksException;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.blocks.BlockID;
@@ -28,6 +32,7 @@ import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
+import com.sk89q.worldedit.world.biome.BaseBiome;
 import com.sk89q.worldedit.world.registry.LegacyWorldData;
 import com.sk89q.worldedit.world.registry.WorldData;
 
@@ -62,12 +67,13 @@ public class NullWorld extends AbstractWorld {
     }
 
     @Override
-    public BiomeType getBiome(Vector2D position) {
+    public BaseBiome getBiome(Vector2D position) {
         return null;
     }
 
     @Override
-    public void setBiome(Vector2D position, BiomeType biome) {
+    public boolean setBiome(Vector2D position, BaseBiome biome) {
+        return false;
     }
 
     @Override

src/main/java/com/sk89q/worldedit/world/World.java

@@ -19,12 +19,10 @@
 
 package com.sk89q.worldedit.world;
 
-import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.BlockVector2D;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.Vector;
-import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.BaseItemStack;
@@ -147,22 +145,6 @@ public interface World extends Extent {
      */
     boolean clearContainerBlockContents(Vector position);
 
-    /**
-     * Get the biome type.
-     *
-     * @param position the (x, z) location to check the biome at
-     * @return the biome type at the location
-     */
-    BiomeType getBiome(Vector2D position);
-
-    /**
-     * Set the biome type.
-     *
-     * @param position the (x, z) location to set the biome at
-     * @param biome the biome type to set to
-     */
-    void setBiome(Vector2D position, BiomeType biome);
-
     /**
      * Drop an item at the given position.
      *

src/main/java/com/sk89q/worldedit/world/biome/BaseBiome.java

@@ -0,0 +1,82 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.biome;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Basic storage object to represent a given biome.
+ */
+public class BaseBiome {
+
+    private int id;
+
+    /**
+     * Create a new biome with the given biome ID.
+     *
+     * @param id the biome ID
+     */
+    public BaseBiome(int id) {
+        this.id = id;
+    }
+
+    /**
+     * Create a clone of the given biome.
+     *
+     * @param biome the biome to clone
+     */
+    public BaseBiome(BaseBiome biome) {
+        checkNotNull(biome);
+        this.id = biome.getId();
+    }
+
+    /**
+     * Get the biome ID.
+     *
+     * @return the biome ID
+     */
+    public int getId() {
+        return id;
+    }
+
+    /**
+     * Set the biome id.
+     *
+     * @param id the biome ID
+     */
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        BaseBiome baseBiome = (BaseBiome) o;
+
+        return id == baseBiome.id;
+    }
+
+    @Override
+    public int hashCode() {
+        return id;
+    }
+}

src/main/java/com/sk89q/worldedit/world/biome/BiomeData.java

@@ -17,20 +17,19 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit;
+package com.sk89q.worldedit.world.biome;
-
-public interface BiomeType {
-
-    public static final BiomeType UNKNOWN = new BiomeType() {
-        public String getName() {
-            return "Unknown";
-        }
-    };
 
 /**
-     * Get the name of this biome type.
+ * Provides information about a biome.
-     *
-     * @return String
  */
-    public String getName();
+public interface BiomeData {
+
+    /**
+     * Get the name of the biome, which does not have to follow any
+     * particular convention.
+     *
+     * @return the biome's name
+     */
+    String getName();
+
 }

src/main/java/com/sk89q/worldedit/world/biome/BiomeName.java

@@ -0,0 +1,57 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.biome;
+
+import com.google.common.base.Function;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+
+import javax.annotation.Nullable;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Returns the name of a biome using a given {@code BiomeRegistry}.
+ */
+class BiomeName implements Function<BaseBiome, String> {
+
+    private final BiomeRegistry registry;
+
+    /**
+     * Create a new instance.
+     *
+     * @param registry the biome registry
+     */
+    BiomeName(BiomeRegistry registry) {
+        checkNotNull(registry);
+        this.registry = registry;
+    }
+
+    @Nullable
+    @Override
+    public String apply(BaseBiome input) {
+        BiomeData data = registry.getData(input);
+        if (data != null) {
+            return data.getName();
+        } else {
+            return null;
+        }
+    }
+
+}

src/main/java/com/sk89q/worldedit/world/biome/Biomes.java

@@ -0,0 +1,70 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.biome;
+
+import com.google.common.base.Function;
+import com.google.common.base.Functions;
+import com.google.common.base.Optional;
+import com.sk89q.worldedit.util.WeightedChoice;
+import com.sk89q.worldedit.util.WeightedChoice.Choice;
+import com.sk89q.worldedit.util.function.LevenshteinDistance;
+import com.sk89q.worldedit.world.registry.BiomeRegistry;
+
+import javax.annotation.Nullable;
+import java.util.Collection;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Utility methods related to biomes.
+ */
+public final class Biomes {
+
+    private Biomes() {
+    }
+
+    /**
+     * Find a biome that matches the given input name.
+     *
+     * @param biomes a list of biomes
+     * @param name the name to test
+     * @param registry a biome registry
+     * @return a biome or null
+     */
+    @Nullable
+    public static BaseBiome findBiomeByName(Collection<BaseBiome> biomes, String name, BiomeRegistry registry) {
+        checkNotNull(biomes);
+        checkNotNull(name);
+        checkNotNull(registry);
+
+        Function<String, ? extends Number> compare = new LevenshteinDistance(name, false, LevenshteinDistance.STANDARD_CHARS);
+        WeightedChoice<BaseBiome> chooser = new WeightedChoice<BaseBiome>(Functions.compose(compare, new BiomeName(registry)), 0);
+        for (BaseBiome biome : biomes) {
+            chooser.consider(biome);
+        }
+        Optional<Choice<BaseBiome>> choice = chooser.getChoice();
+        if (choice.isPresent() && choice.get().getScore() <= 1) {
+            return choice.get().getValue();
+        } else {
+            return null;
+        }
+    }
+
+}

src/main/java/com/sk89q/worldedit/world/registry/BiomeRegistry.java

@@ -17,31 +17,42 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit;
+package com.sk89q.worldedit.world.registry;
 
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.BiomeData;
+
+import javax.annotation.Nullable;
 import java.util.List;
 
-public interface BiomeTypes {
+/**
+ * Provides information on biomes.
+ */
+public interface BiomeRegistry {
 
     /**
-     * Returns if a biome with the given name is available.
+     * Create a new biome given its biome ID.
      *
-     * @param name
+     * @param id its biome ID
-     * @return
+     * @return a new biome or null if it can't be created
      */
-    boolean has(String name);
+    @Nullable
+    BaseBiome createFromId(int id);
 
     /**
-     * Returns the biome type for the given name
+     * Get a list of available biomes.
      *
-     * @return
+     * @return a list of biomes
      */
-    BiomeType get(String name) throws UnknownBiomeTypeException;
+    List<BaseBiome> getBiomes();
 
     /**
-     * Returns a list of all available biome types.
+     * Get data about a biome.
      *
-     * @return
+     * @param biome the biome
+     * @return a data object or null if information is not known
      */
-    List<BiomeType> all();
+    @Nullable
+    BiomeData getData(BaseBiome biome);
+
 }

src/main/java/com/sk89q/worldedit/world/registry/LegacyWorldData.java

@@ -23,16 +23,17 @@ package com.sk89q.worldedit.world.registry;
  * An implementation of {@link WorldData} that uses legacy numeric IDs and
  * a built-in block database.
  */
-public final class LegacyWorldData implements WorldData {
+public class LegacyWorldData implements WorldData {
 
     private static final LegacyWorldData INSTANCE = new LegacyWorldData();
     private final LegacyBlockRegistry blockRegistry = new LegacyBlockRegistry();
     private final NullEntityRegistry entityRegistry = new NullEntityRegistry();
+    private final NullBiomeRegistry biomeRegistry = new NullBiomeRegistry();
 
     /**
      * Create a new instance.
      */
-    private LegacyWorldData() {
+    protected LegacyWorldData() {
     }
 
     @Override
@@ -45,6 +46,11 @@ public final class LegacyWorldData implements WorldData {
         return entityRegistry;
     }
 
+    @Override
+    public BiomeRegistry getBiomeRegistry() {
+        return biomeRegistry;
+    }
+
     /**
      * Get a singleton instance.
      *

src/main/java/com/sk89q/worldedit/world/registry/NullBiomeRegistry.java

@@ -0,0 +1,57 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.registry;
+
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.biome.BiomeData;
+
+import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A biome registry that knows nothing.
+ */
+public class NullBiomeRegistry implements BiomeRegistry {
+
+    /**
+     * Create a new instance.
+     */
+    public NullBiomeRegistry() {
+    }
+
+    @Nullable
+    @Override
+    public BaseBiome createFromId(int id) {
+        return null;
+    }
+
+    @Override
+    public List<BaseBiome> getBiomes() {
+        return Collections.emptyList();
+    }
+
+    @Nullable
+    @Override
+    public BiomeData getData(BaseBiome biome) {
+        return null;
+    }
+
+}

src/main/java/com/sk89q/worldedit/world/registry/WorldData.java

@@ -39,4 +39,11 @@ public interface WorldData {
      */
     EntityRegistry getEntityRegistry();
 
+    /**
+     * Get the biome registry.
+     *
+     * @return the biome registry
+     */
+    BiomeRegistry getBiomeRegistry();
+
 }