Merge remote-tracking branch 'origin/master' into ver/6.0.0

# Conflicts:
#	build.gradle.kts
#	common/src/main/java/com/dfsek/terra/api/TerraPlugin.java
#	common/src/main/java/com/dfsek/terra/api/structures/script/StructureScript.java
#	common/src/main/java/com/dfsek/terra/config/pack/ConfigPack.java
#	common/src/main/java/com/dfsek/terra/profiler/Profiler.java
#	common/src/main/java/com/dfsek/terra/profiler/ProfilerImpl.java
#	common/src/main/java/com/dfsek/terra/registry/OpenRegistry.java
#	common/src/main/java/com/dfsek/terra/world/generation/generators/DefaultChunkGenerator3D.java
#	common/src/main/java/com/dfsek/terra/world/population/FloraPopulator.java
#	common/src/main/java/com/dfsek/terra/world/population/OrePopulator.java
#	common/src/main/java/com/dfsek/terra/world/population/StructurePopulator.java
#	common/src/main/java/com/dfsek/terra/world/population/TreePopulator.java
#	common/src/test/java/biome/DistributionTest.java
#	common/src/test/java/biome/ImageTest.java
#	platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/population/PopulationManager.java
#	platforms/fabric/src/main/java/com/dfsek/terra/fabric/TerraFabricPlugin.java
#	platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/FabricTree.java

platforms/bukkit/build.gradle.kts

@@ -70,8 +70,8 @@ fun installServer(dir: String) {
     // Cloning test setup.
     gitClone("https://github.com/PolyhedralDev/WorldGenTestServer")
     // Copying plugins
-    Files.move(Paths.get("WorldGenTestServer/plugins"),
-            Paths.get("$testDir/$dir/plugins"),
+    Files.move(file("WorldGenTestServer/plugins").toPath(),
+            file("$testDir/$dir/plugins").toPath(),
             StandardCopyOption.REPLACE_EXISTING)
     // Copying config
     val serverText = URL("https://raw.githubusercontent.com/PolyhedralDev/WorldGenTestServer/master/server.properties").readText()

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/TerraBukkitPlugin.java

@@ -34,6 +34,7 @@ import com.dfsek.terra.bukkit.listeners.SpigotListener;
 import com.dfsek.terra.bukkit.listeners.TerraListener;
 import com.dfsek.terra.bukkit.util.PaperUtil;
 import com.dfsek.terra.bukkit.world.BukkitBiome;
+import com.dfsek.terra.bukkit.world.BukkitWorld;
 import com.dfsek.terra.commands.CommandUtil;
 import com.dfsek.terra.config.GenericLoaders;
 import com.dfsek.terra.config.PluginConfig;
@@ -268,14 +269,15 @@ public class TerraBukkitPlugin extends JavaPlugin implements TerraPlugin {
         return checkedRegistry;
     }
 
-    public TerraWorld getWorld(World w) {
-        if(!TerraWorld.isTerraWorld(w))
+    public TerraWorld getWorld(World world) {
+        BukkitWorld w = (BukkitWorld) world;
+        if(!w.isTerraWorld())
             throw new IllegalArgumentException("Not a Terra world! " + w.getGenerator());
         if(!worlds.containsKey(w.getName())) {
             getLogger().warning("Unexpected world load detected: \"" + w.getName() + "\"");
             return new TerraWorld(w, ((TerraChunkGenerator) w.getGenerator().getHandle()).getConfigPack(), this);
         }
-        return worldMap.computeIfAbsent(w, world -> new TerraWorld(w, worlds.get(w.getName()), this));
+        return worldMap.computeIfAbsent(w, w2 -> new TerraWorld(w, worlds.get(w.getName()), this));
     }
 
     @Override

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/generator/BukkitChunkGeneratorWrapper.java

@@ -52,7 +52,7 @@ public class BukkitChunkGeneratorWrapper extends ChunkGenerator implements Gener
     }
 
     public static synchronized void fixChunk(Chunk c) {
-        if(!TerraWorld.isTerraWorld(c.getWorld())) throw new IllegalArgumentException();
+        if(!c.getWorld().isTerraWorld()) throw new IllegalArgumentException();
         popMap.get(c.getWorld()).checkNeighbors(c.getX(), c.getZ(), c.getWorld());
     }
 

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/listeners/CommonListener.java

@@ -44,7 +44,7 @@ public class CommonListener implements Listener {
     public void onSaplingGrow(StructureGrowEvent e) {
         if(e.isCancelled()) return;
         World bukkit = BukkitAdapter.adapt(e.getWorld());
-        if(!TerraWorld.isTerraWorld(bukkit)) return;
+        if(!bukkit.isTerraWorld()) return;
         TerraWorld tw = main.getWorld(bukkit);
         WorldConfig c = tw.getConfig();
         if(c.getTemplate().isDisableSaplings()) return;

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/listeners/PaperListener.java

@@ -18,7 +18,7 @@ public class PaperListener implements Listener {
 
     @EventHandler
     public void onStructureLocate(StructureLocateEvent e) {
-        if(!TerraWorld.isTerraWorld(BukkitAdapter.adapt(e.getWorld()))) return;
+        if(!BukkitAdapter.adapt(e.getWorld()).isTerraWorld()) return;
         e.setResult(null); // Assume no result.
         String name = "minecraft:" + e.getType().getName();
         main.getDebugLogger().info("Overriding structure location for \"" + name + "\"");

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/listeners/SpigotListener.java

@@ -34,7 +34,7 @@ public class SpigotListener implements Listener {
         Entity entity = e.getEntity();
         if(e.getEntityType().equals(EntityType.ENDER_SIGNAL)) {
             main.getDebugLogger().info("Detected Ender Signal...");
-            if(!TerraWorld.isTerraWorld(BukkitAdapter.adapt(e.getEntity().getWorld()))) return;
+            if(!BukkitAdapter.adapt(e.getEntity().getWorld()).isTerraWorld()) return;
             TerraWorld tw = main.getWorld(BukkitAdapter.adapt(e.getEntity().getWorld()));
             EnderSignal signal = (EnderSignal) entity;
             TerraStructure config = tw.getConfig().getRegistry(TerraStructure.class).get(tw.getConfig().getTemplate().getLocatable().get("STRONGHOLD"));
@@ -53,7 +53,7 @@ public class SpigotListener implements Listener {
 
     @EventHandler
     public void onCartographerChange(VillagerAcquireTradeEvent e) {
-        if(!TerraWorld.isTerraWorld(BukkitAdapter.adapt(e.getEntity().getWorld()))) return;
+        if(!BukkitAdapter.adapt(e.getEntity().getWorld()).isTerraWorld()) return;
         if(!(e.getEntity() instanceof Villager)) return;
         if(((Villager) e.getEntity()).getProfession().equals(Villager.Profession.CARTOGRAPHER)) {
             main.logger().severe("Prevented server crash by stopping Cartographer villager from spawning.");
@@ -65,7 +65,7 @@ public class SpigotListener implements Listener {
 
     @EventHandler
     public void onCartographerLevel(VillagerCareerChangeEvent e) {
-        if(!TerraWorld.isTerraWorld(BukkitAdapter.adapt(e.getEntity().getWorld()))) return;
+        if(!BukkitAdapter.adapt(e.getEntity().getWorld()).isTerraWorld()) return;
         if(e.getProfession().equals(Villager.Profession.CARTOGRAPHER)) {
             main.logger().severe("Prevented server crash by stopping Cartographer villager from spawning.");
             main.logger().severe("Please upgrade to Paper, which has a StructureLocateEvent that fixes this issue");

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/population/ChunkCoordinate.java

@@ -2,6 +2,7 @@ package com.dfsek.terra.bukkit.population;
 
 
 import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.bukkit.world.BukkitWorld;
 
 import java.io.Serializable;
 import java.util.UUID;
@@ -21,7 +22,7 @@ public class ChunkCoordinate implements Serializable {
     public ChunkCoordinate(Chunk c) {
         this.x = c.getX();
         this.z = c.getZ();
-        this.worldID = c.getWorld().getUID();
+        this.worldID = ((BukkitWorld) c.getWorld()).getUID();
     }
 
     public UUID getWorldID() {

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/population/Gaea.java

@@ -1,20 +0,0 @@
-package com.dfsek.terra.bukkit.population;
-
-
-import com.dfsek.terra.api.platform.world.World;
-
-import java.io.File;
-
-public class Gaea {
-    private static boolean debug;
-
-    public static File getGaeaFolder(World w) {
-        File f = new File(w.getWorldFolder(), "gaea");
-        f.mkdirs();
-        return f;
-    }
-
-    public static boolean isDebug() {
-        return debug;
-    }
-}

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/population/PopulationManager.java

@@ -9,6 +9,7 @@ import com.dfsek.terra.api.world.generation.TerraChunkGenerator;
 import com.dfsek.terra.bukkit.TerraBukkitPlugin;
 import com.dfsek.terra.bukkit.world.BukkitAdapter;
 import com.dfsek.terra.profiler.ProfileFrame;
+import com.dfsek.terra.bukkit.world.BukkitWorld;
 import org.bukkit.generator.BlockPopulator;
 import org.jetbrains.annotations.NotNull;
 
@@ -32,21 +33,28 @@ public class PopulationManager extends BlockPopulator {
 
     @SuppressWarnings("unchecked")
     public synchronized void saveBlocks(World w) throws IOException {
-        File f = new File(Gaea.getGaeaFolder(w), "chunks.bin");
+        File f = new File(getDataFolder(w), "chunks.bin");
         f.createNewFile();
         SerializationUtil.toFile((HashSet<ChunkCoordinate>) needsPop.clone(), f);
     }
 
     @SuppressWarnings("unchecked")
     public synchronized void loadBlocks(World w) throws IOException, ClassNotFoundException {
-        File f = new File(Gaea.getGaeaFolder(w), "chunks.bin");
+        File f = new File(getDataFolder(w), "chunks.bin");
         needsPop.addAll((HashSet<ChunkCoordinate>) SerializationUtil.fromFile(f));
     }
 
+    public static File getDataFolder(World w) {
+        File f = new File(((BukkitWorld) w).getWorldFolder(), "gaea");
+        f.mkdirs();
+        return f;
+    }
+
 
     // Synchronize to prevent chunks from being queued for population multiple times.
-    public synchronized void checkNeighbors(int x, int z, World w) {
-        ChunkCoordinate c = new ChunkCoordinate(x, z, w.getUID());
+    public synchronized void checkNeighbors(int x, int z, World world) {
+        BukkitWorld w = (BukkitWorld) world;
+        ChunkCoordinate c = new ChunkCoordinate(x, z, (w).getUID());
         if(w.isChunkGenerated(x + 1, z)
                 && w.isChunkGenerated(x - 1, z)
                 && w.isChunkGenerated(x, z + 1)

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/world/BukkitWorld.java

@@ -37,17 +37,14 @@ public class BukkitWorld implements World {
         return new BukkitChunkGenerator(delegate.getGenerator());
     }
 
-    @Override
     public String getName() {
         return delegate.getName();
     }
 
-    @Override
     public UUID getUID() {
         return delegate.getUID();
     }
 
-    @Override
     public boolean isChunkGenerated(int x, int z) {
         return delegate.isChunkGenerated(x, z);
     }
@@ -57,7 +54,6 @@ public class BukkitWorld implements World {
         return BukkitAdapter.adapt(delegate.getChunkAt(x, z));
     }
 
-    @Override
     public File getWorldFolder() {
         return delegate.getWorldFolder();
     }

platforms/fabric/build.gradle.kts

@@ -33,6 +33,7 @@ dependencies {
 
 configure<LoomGradleExtension> {
     accessWidener("src/main/resources/terra.accesswidener")
+    refmapName = "terra-refmap.json"
 }
 
 val remapped = tasks.register<RemapJarTask>("remapShadedJar") {
@@ -46,12 +47,12 @@ val remapped = tasks.register<RemapJarTask>("remapShadedJar") {
 }
 
 
-tasks.register<TaskModrinthUpload>("publishModrinth") {
+tasks.register<TaskModrinthUpload>("publishModrinthFabric") {
     dependsOn("remapShadedJar")
     group = "fabric"
     token = System.getenv("MODRINTH_SECRET")
     projectId = "FIlZB9L0"
-    versionNumber = project.version.toString()
+    versionNumber = "${project.version}-fabric"
     uploadFile = remapped.get().archiveFile.get().asFile
     releaseType = "beta"
     addGameVersion("1.16.4")

platforms/fabric/src/main/java/com/dfsek/terra/fabric/FabricAdapter.java

@@ -0,0 +1,224 @@
+package com.dfsek.terra.fabric;
+
+import com.dfsek.terra.api.math.vector.Vector3;
+import com.dfsek.terra.api.platform.block.Axis;
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.data.Bisected;
+import com.dfsek.terra.api.platform.block.data.Slab;
+import com.dfsek.terra.api.platform.block.data.Stairs;
+import com.dfsek.terra.api.platform.block.state.Container;
+import com.dfsek.terra.api.platform.block.state.MobSpawner;
+import com.dfsek.terra.api.platform.block.state.Sign;
+import com.dfsek.terra.fabric.block.FabricBlockData;
+import com.dfsek.terra.fabric.block.data.FabricDirectional;
+import com.dfsek.terra.fabric.block.data.FabricMultipleFacing;
+import com.dfsek.terra.fabric.block.data.FabricOrientable;
+import com.dfsek.terra.fabric.block.data.FabricRotatable;
+import com.dfsek.terra.fabric.block.data.FabricSlab;
+import com.dfsek.terra.fabric.block.data.FabricStairs;
+import com.dfsek.terra.fabric.block.data.FabricWaterlogged;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.LootableContainerBlockEntity;
+import net.minecraft.block.entity.MobSpawnerBlockEntity;
+import net.minecraft.block.entity.SignBlockEntity;
+import net.minecraft.block.enums.BlockHalf;
+import net.minecraft.block.enums.SlabType;
+import net.minecraft.block.enums.StairShape;
+import net.minecraft.state.property.Properties;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.WorldAccess;
+
+import java.util.Arrays;
+
+public final class FabricAdapter {
+    public static BlockPos adapt(Vector3 v) {
+        return new BlockPos(v.getBlockX(), v.getBlockY(), v.getBlockZ());
+    }
+
+    public static Vector3 adapt(BlockPos pos) {
+        return new Vector3(pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    public static FabricBlockData adapt(BlockState state) {
+        if(state.contains(Properties.STAIR_SHAPE)) return new FabricStairs(state);
+
+        if(state.contains(Properties.SLAB_TYPE)) return new FabricSlab(state);
+
+        if(state.contains(Properties.AXIS)) return new FabricOrientable(state, Properties.AXIS);
+        if(state.contains(Properties.HORIZONTAL_AXIS)) return new FabricOrientable(state, Properties.HORIZONTAL_AXIS);
+
+        if(state.contains(Properties.ROTATION)) return new FabricRotatable(state);
+
+        if(state.contains(Properties.FACING)) return new FabricDirectional(state, Properties.FACING);
+        if(state.contains(Properties.HOPPER_FACING)) return new FabricDirectional(state, Properties.HOPPER_FACING);
+        if(state.contains(Properties.HORIZONTAL_FACING)) return new FabricDirectional(state, Properties.HORIZONTAL_FACING);
+
+        if(state.getProperties().containsAll(Arrays.asList(Properties.NORTH, Properties.SOUTH, Properties.EAST, Properties.WEST)))
+            return new FabricMultipleFacing(state);
+        if(state.contains(Properties.WATERLOGGED)) return new FabricWaterlogged(state);
+        return new FabricBlockData(state);
+    }
+
+    public static Direction adapt(BlockFace face) {
+        switch(face) {
+            case NORTH:
+                return Direction.NORTH;
+            case WEST:
+                return Direction.WEST;
+            case SOUTH:
+                return Direction.SOUTH;
+            case EAST:
+                return Direction.EAST;
+            case UP:
+                return Direction.UP;
+            case DOWN:
+                return Direction.DOWN;
+            default:
+                throw new IllegalArgumentException("Illegal direction: " + face);
+        }
+    }
+
+
+    public static com.dfsek.terra.api.platform.block.state.BlockState adapt(com.dfsek.terra.api.platform.block.Block block) {
+        WorldAccess worldAccess = (WorldAccess) block.getLocation().getWorld();
+
+        BlockEntity entity = worldAccess.getBlockEntity(adapt(block.getLocation().toVector()));
+        if(entity instanceof SignBlockEntity) {
+            return (Sign) entity;
+        } else if(entity instanceof MobSpawnerBlockEntity) {
+            return (MobSpawner) entity;
+        } else if(entity instanceof LootableContainerBlockEntity) {
+            return (Container) entity;
+        }
+        return null;
+    }
+
+    public static Stairs.Shape adapt(StairShape shape) {
+        switch(shape) {
+            case OUTER_RIGHT:
+                return Stairs.Shape.OUTER_RIGHT;
+            case INNER_RIGHT:
+                return Stairs.Shape.INNER_RIGHT;
+            case OUTER_LEFT:
+                return Stairs.Shape.OUTER_LEFT;
+            case INNER_LEFT:
+                return Stairs.Shape.INNER_LEFT;
+            case STRAIGHT:
+                return Stairs.Shape.STRAIGHT;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static Bisected.Half adapt(BlockHalf half) {
+        switch(half) {
+            case BOTTOM:
+                return Bisected.Half.BOTTOM;
+            case TOP:
+                return Bisected.Half.TOP;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static BlockFace adapt(Direction direction) {
+        switch(direction) {
+            case DOWN:
+                return BlockFace.DOWN;
+            case UP:
+                return BlockFace.UP;
+            case WEST:
+                return BlockFace.WEST;
+            case EAST:
+                return BlockFace.EAST;
+            case NORTH:
+                return BlockFace.NORTH;
+            case SOUTH:
+                return BlockFace.SOUTH;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static Slab.Type adapt(SlabType type) {
+        switch(type) {
+            case BOTTOM:
+                return Slab.Type.BOTTOM;
+            case TOP:
+                return Slab.Type.TOP;
+            case DOUBLE:
+                return Slab.Type.DOUBLE;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static StairShape adapt(Stairs.Shape shape) {
+        switch(shape) {
+            case STRAIGHT:
+                return StairShape.STRAIGHT;
+            case INNER_LEFT:
+                return StairShape.INNER_LEFT;
+            case OUTER_LEFT:
+                return StairShape.OUTER_LEFT;
+            case INNER_RIGHT:
+                return StairShape.INNER_RIGHT;
+            case OUTER_RIGHT:
+                return StairShape.OUTER_RIGHT;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static BlockHalf adapt(Bisected.Half half) {
+        switch(half) {
+            case TOP:
+                return BlockHalf.TOP;
+            case BOTTOM:
+                return BlockHalf.BOTTOM;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static SlabType adapt(Slab.Type type) {
+        switch(type) {
+            case DOUBLE:
+                return SlabType.DOUBLE;
+            case TOP:
+                return SlabType.TOP;
+            case BOTTOM:
+                return SlabType.BOTTOM;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static Axis adapt(Direction.Axis axis) {
+        switch(axis) {
+            case X:
+                return Axis.X;
+            case Y:
+                return Axis.Y;
+            case Z:
+                return Axis.Z;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static Direction.Axis adapt(Axis axis) {
+        switch(axis) {
+            case Z:
+                return Direction.Axis.Z;
+            case Y:
+                return Direction.Axis.Y;
+            case X:
+                return Direction.Axis.X;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/TerraFabricPlugin.java

@@ -18,6 +18,7 @@ import com.dfsek.terra.api.event.annotations.Priority;
 import com.dfsek.terra.api.event.events.config.ConfigPackPreLoadEvent;
 import com.dfsek.terra.api.platform.CommandSender;
 import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.entity.Entity;
 import com.dfsek.terra.api.platform.handle.ItemHandle;
 import com.dfsek.terra.api.platform.handle.WorldHandle;
 import com.dfsek.terra.api.platform.world.Tree;
@@ -48,12 +49,22 @@ import com.dfsek.terra.fabric.world.generator.FabricChunkGenerator;
 import com.dfsek.terra.fabric.world.generator.FabricChunkGeneratorWrapper;
 import com.dfsek.terra.profiler.Profiler;
 import com.dfsek.terra.profiler.ProfilerImpl;
+import com.dfsek.terra.fabric.handle.FabricItemHandle;
+import com.dfsek.terra.fabric.handle.FabricWorldHandle;
+import com.dfsek.terra.fabric.mixin.access.BiomeEffectsAccessor;
+import com.dfsek.terra.fabric.mixin.access.GeneratorTypeAccessor;
+import com.dfsek.terra.fabric.generation.TerraBiomeSource;
+import com.dfsek.terra.fabric.generation.PopulatorFeature;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
+import com.dfsek.terra.profiler.Profiler;
+import com.dfsek.terra.profiler.ProfilerImpl;
 import com.dfsek.terra.registry.exception.DuplicateEntryException;
 import com.dfsek.terra.registry.master.AddonRegistry;
 import com.dfsek.terra.registry.master.ConfigRegistry;
 import com.dfsek.terra.world.TerraWorld;
 import com.mojang.brigadier.arguments.StringArgumentType;
 import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
@@ -77,7 +88,6 @@ import net.minecraft.world.gen.decorator.Decorator;
 import net.minecraft.world.gen.decorator.NopeDecoratorConfig;
 import net.minecraft.world.gen.feature.ConfiguredFeature;
 import net.minecraft.world.gen.feature.ConfiguredFeatures;
-import net.minecraft.world.gen.feature.DefaultBiomeFeatures;
 import net.minecraft.world.gen.feature.DefaultFeatureConfig;
 import net.minecraft.world.gen.feature.FeatureConfig;
 import net.minecraft.world.gen.surfacebuilder.SurfaceBuilder;
@@ -158,10 +168,16 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
     public TerraWorld getWorld(World world) {
         return worldMap.computeIfAbsent(world.getSeed(), w -> {
             logger.info("Loading world " + w);
-            return new TerraWorld(world, ((FabricChunkGeneratorWrapper) ((FabricChunkGenerator) world.getGenerator()).getHandle()).getPack(), this);
+            return new TerraWorld(world, ((FabricChunkGeneratorWrapper) world.getGenerator()).getPack(), this);
         });
     }
 
+    public TerraWorld getWorld(long seed) {
+        TerraWorld world = worldMap.get(seed);
+        if(world == null) throw new IllegalArgumentException("No world exists with seed " + seed);
+        return world;
+    }
+
     @Override
     public Logger logger() {
         return logger;
@@ -243,41 +259,37 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
         genericLoaders.register(registry);
         registry
                 .registerLoader(BlockData.class, (t, o, l) -> worldHandle.createBlockData((String) o))
-                .registerLoader(com.dfsek.terra.api.platform.world.Biome.class, (t, o, l) -> new FabricBiome(biomeFixer.translate((String) o)));
+                .registerLoader(com.dfsek.terra.api.platform.world.Biome.class, (t, o, l) -> biomeFixer.translate((String) o));
     }
 
     private Biome createBiome(BiomeBuilder biome) {
-        SpawnSettings.Builder spawnSettings = new SpawnSettings.Builder();
-        DefaultBiomeFeatures.addFarmAnimals(spawnSettings);
-        DefaultBiomeFeatures.addMonsters(spawnSettings, 95, 5, 100);
-
         BiomeTemplate template = biome.getTemplate();
         Map<String, Integer> colors = template.getColors();
 
-        Biome vanilla = ((FabricBiome) new ArrayList<>(biome.getVanillaBiomes().getContents()).get(0)).getHandle();
+        Biome vanilla = (Biome) (new ArrayList<>(biome.getVanillaBiomes().getContents()).get(0)).getHandle();
 
         GenerationSettings.Builder generationSettings = new GenerationSettings.Builder();
         generationSettings.surfaceBuilder(SurfaceBuilder.DEFAULT.withConfig(new TernarySurfaceConfig(Blocks.GRASS_BLOCK.getDefaultState(), Blocks.DIRT.getDefaultState(), Blocks.GRAVEL.getDefaultState()))); // It needs a surfacebuilder, even though we dont use it.
         generationSettings.feature(GenerationStep.Feature.VEGETAL_DECORATION, POPULATOR_CONFIGURED_FEATURE);
 
 
+        BiomeEffectsAccessor accessor = (BiomeEffectsAccessor) vanilla.getEffects();
         BiomeEffects.Builder effects = new BiomeEffects.Builder()
-                .waterColor(colors.getOrDefault("water", vanilla.getEffects().waterColor))
-                .waterFogColor(colors.getOrDefault("water-fog", vanilla.getEffects().waterFogColor))
-                .fogColor(colors.getOrDefault("fog", vanilla.getEffects().fogColor))
-                .skyColor(colors.getOrDefault("sky", vanilla.getEffects().skyColor))
-                .grassColorModifier(vanilla.getEffects().grassColorModifier);
+                .waterColor(colors.getOrDefault("water", accessor.getWaterColor()))
+                .waterFogColor(colors.getOrDefault("water-fog", accessor.getWaterFogColor()))
+                .fogColor(colors.getOrDefault("fog", accessor.getFogColor()))
+                .skyColor(colors.getOrDefault("sky", accessor.getSkyColor()))
+                .grassColorModifier(accessor.getGrassColorModifier());
 
         if(colors.containsKey("grass")) {
             effects.grassColor(colors.get("grass"));
         } else {
-            vanilla.getEffects().grassColor.ifPresent(effects::grassColor);
+            accessor.getGrassColor().ifPresent(effects::grassColor);
         }
-        vanilla.getEffects().foliageColor.ifPresent(effects::foliageColor);
         if(colors.containsKey("foliage")) {
             effects.foliageColor(colors.get("foliage"));
         } else {
-            vanilla.getEffects().foliageColor.ifPresent(effects::foliageColor);
+            accessor.getFoliageColor().ifPresent(effects::foliageColor);
         }
 
         return new Biome.Builder()
@@ -288,7 +300,7 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
                 .temperature(vanilla.getTemperature())
                 .downfall(vanilla.getDownfall())
                 .effects(effects.build())
-                .spawnSettings(spawnSettings.build())
+                .spawnSettings(vanilla.getSpawnSettings())
                 .generationSettings(generationSettings.build())
                 .build();
     }
@@ -330,7 +342,7 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
                 };
                 //noinspection ConstantConditions
                 ((GeneratorTypeAccessor) generatorType).setTranslationKey(new LiteralText("Terra:" + pack.getTemplate().getID()));
-                GeneratorTypeAccessor.getVALUES().add(generatorType);
+                GeneratorTypeAccessor.getValues().add(generatorType);
             });
         }
 
@@ -362,7 +374,11 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
     private RequiredArgumentBuilder<ServerCommandSource, String> assemble(RequiredArgumentBuilder<ServerCommandSource, String> in, CommandManager manager) {
         return in.suggests((context, builder) -> {
             List<String> args = parseCommand(context.getInput());
-            CommandSender sender = FabricAdapter.adapt(context.getSource());
+            CommandSender sender = (CommandSender) context.getSource();
+            try {
+                sender = (Entity) context.getSource().getEntityOrThrow();
+            } catch(CommandSyntaxException ignore) {
+            }
             try {
                 manager.tabComplete(args.remove(0), sender, args).forEach(builder::suggest);
             } catch(CommandException e) {
@@ -371,8 +387,13 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
             return builder.buildFuture();
         }).executes(context -> {
             List<String> args = parseCommand(context.getInput());
+            CommandSender sender = (CommandSender) context.getSource();
             try {
-                manager.execute(args.remove(0), FabricAdapter.adapt(context.getSource()), args);
+                sender = (Entity) context.getSource().getEntityOrThrow();
+            } catch(CommandSyntaxException ignore) {
+            }
+            try {
+                manager.execute(args.remove(0), sender, args);
             } catch(CommandException e) {
                 context.getSource().sendError(new LiteralText(e.getMessage()));
             }
@@ -443,7 +464,7 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
 
         private void injectTree(CheckedRegistry<Tree> registry, String id, ConfiguredFeature<?, ?> tree) {
             try {
-                registry.add(id, new FabricTree(tree));
+                registry.add(id, (Tree) tree);
             } catch(DuplicateEntryException ignore) {
             }
         }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/FabricBlock.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.fabric.world.block;
+package com.dfsek.terra.fabric.block;
 
 import com.dfsek.terra.api.math.vector.Location;
 import com.dfsek.terra.api.platform.block.Block;
@@ -6,9 +6,8 @@ import com.dfsek.terra.api.platform.block.BlockData;
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.BlockType;
 import com.dfsek.terra.api.platform.block.state.BlockState;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.block.state.FabricBlockState;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldAccess;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.fabric.FabricAdapter;
 import net.minecraft.block.FluidBlock;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.WorldAccess;
@@ -35,7 +34,7 @@ public class FabricBlock implements Block {
 
     @Override
     public BlockState getState() {
-        return FabricBlockState.newInstance(this);
+        return FabricAdapter.adapt(this);
     }
 
     @Override
@@ -51,7 +50,7 @@ public class FabricBlock implements Block {
 
     @Override
     public Location getLocation() {
-        return FabricAdapter.adapt(delegate.position).toLocation(new FabricWorldAccess(delegate.worldAccess));
+        return FabricAdapter.adapt(delegate.position).toLocation((World) delegate.worldAccess);
     }
 
     @Override

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/FabricBlockData.java

@@ -1,11 +1,10 @@
-package com.dfsek.terra.fabric.world.block;
+package com.dfsek.terra.fabric.block;
 
 import com.dfsek.terra.api.platform.block.BlockData;
 import com.dfsek.terra.api.platform.block.BlockType;
-import com.dfsek.terra.fabric.world.FabricAdapter;
+import com.dfsek.terra.fabric.mixin.access.StateAccessor;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
-import net.minecraft.state.State;
 import net.minecraft.util.registry.Registry;
 
 import java.util.stream.Collectors;
@@ -19,7 +18,7 @@ public class FabricBlockData implements BlockData {
 
     @Override
     public BlockType getBlockType() {
-        return FabricAdapter.adapt(delegate.getBlock());
+        return (BlockType) delegate.getBlock();
     }
 
     @Override
@@ -41,7 +40,7 @@ public class FabricBlockData implements BlockData {
         StringBuilder data = new StringBuilder(Registry.BLOCK.getId(delegate.getBlock()).toString());
         if(!delegate.getEntries().isEmpty()) {
             data.append('[');
-            data.append(delegate.getEntries().entrySet().stream().map(State.PROPERTY_MAP_PRINTER).collect(Collectors.joining(",")));
+            data.append(delegate.getEntries().entrySet().stream().map(StateAccessor.getPropertyMapPrinter()).collect(Collectors.joining(",")));
             data.append(']');
         }
         return data.toString();

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricAnaloguePowerable.java

@@ -1,7 +1,7 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.data.AnaloguePowerable;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 
 /**

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricDirectional.java

@@ -1,9 +1,9 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.data.Directional;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.FabricAdapter;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.DirectionProperty;
 

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricMultipleFacing.java

@@ -1,8 +1,8 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.data.MultipleFacing;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.Properties;
 

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricOrientable.java

@@ -1,8 +1,9 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.Axis;
 import com.dfsek.terra.api.platform.block.data.Orientable;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.FabricAdapter;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.EnumProperty;
 import net.minecraft.util.math.Direction;
@@ -26,11 +27,11 @@ public class FabricOrientable extends FabricBlockData implements Orientable {
 
     @Override
     public Axis getAxis() {
-        return FabricEnumAdapter.adapt(getHandle().get(property));
+        return FabricAdapter.adapt(getHandle().get(property));
     }
 
     @Override
     public void setAxis(Axis axis) {
-        delegate = delegate.with(property, FabricEnumAdapter.adapt(axis));
+        delegate = delegate.with(property, FabricAdapter.adapt(axis));
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricRotatable.java

@@ -1,8 +1,8 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.data.Rotatable;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.Properties;
 

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricSlab.java

@@ -1,6 +1,7 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.data.Slab;
+import com.dfsek.terra.fabric.FabricAdapter;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.Properties;
 
@@ -11,11 +12,11 @@ public class FabricSlab extends FabricWaterlogged implements Slab {
 
     @Override
     public Type getType() {
-        return FabricEnumAdapter.adapt(delegate.get(Properties.SLAB_TYPE));
+        return FabricAdapter.adapt(delegate.get(Properties.SLAB_TYPE));
     }
 
     @Override
     public void setType(Type type) {
-        delegate = delegate.with(Properties.SLAB_TYPE, FabricEnumAdapter.adapt(type));
+        delegate = delegate.with(Properties.SLAB_TYPE, FabricAdapter.adapt(type));
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricStairs.java

@@ -1,7 +1,8 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.data.Stairs;
+import com.dfsek.terra.fabric.FabricAdapter;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.Properties;
 
@@ -12,31 +13,31 @@ public class FabricStairs extends FabricWaterlogged implements Stairs {
 
     @Override
     public Shape getShape() {
-        return FabricEnumAdapter.adapt(getHandle().get(Properties.STAIR_SHAPE));
+        return FabricAdapter.adapt(getHandle().get(Properties.STAIR_SHAPE));
     }
 
     @Override
     public void setShape(Shape shape) {
-        super.delegate = getHandle().with(Properties.STAIR_SHAPE, FabricEnumAdapter.adapt(shape));
+        super.delegate = getHandle().with(Properties.STAIR_SHAPE, FabricAdapter.adapt(shape));
     }
 
     @Override
     public Half getHalf() {
-        return FabricEnumAdapter.adapt(getHandle().get(Properties.BLOCK_HALF));
+        return FabricAdapter.adapt(getHandle().get(Properties.BLOCK_HALF));
     }
 
     @Override
     public void setHalf(Half half) {
-        super.delegate = getHandle().with(Properties.BLOCK_HALF, FabricEnumAdapter.adapt(half));
+        super.delegate = getHandle().with(Properties.BLOCK_HALF, FabricAdapter.adapt(half));
     }
 
     @Override
     public BlockFace getFacing() {
-        return FabricEnumAdapter.adapt(getHandle().get(Properties.HORIZONTAL_FACING));
+        return FabricAdapter.adapt(getHandle().get(Properties.HORIZONTAL_FACING));
     }
 
     @Override
     public void setFacing(BlockFace facing) {
-        super.delegate = getHandle().with(Properties.HORIZONTAL_FACING, FabricEnumAdapter.adapt(facing));
+        super.delegate = getHandle().with(Properties.HORIZONTAL_FACING, FabricAdapter.adapt(facing));
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/block/data/FabricWaterlogged.java

@@ -1,7 +1,7 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.fabric.block.data;
 
 import com.dfsek.terra.api.platform.block.data.Waterlogged;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import net.minecraft.block.BlockState;
 import net.minecraft.state.property.Properties;
 

platforms/fabric/src/main/java/com/dfsek/terra/fabric/command/FabricCommandAdapter.java

@@ -1,7 +0,0 @@
-package com.dfsek.terra.fabric.command;
-
-public class FabricCommandAdapter {
-    public static void register() {
-
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/command/StringListArgumentType.java

@@ -1,17 +0,0 @@
-package com.dfsek.terra.fabric.command;
-
-import com.mojang.brigadier.StringReader;
-import com.mojang.brigadier.arguments.ArgumentType;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-public class StringListArgumentType implements ArgumentType<List<String>> {
-    @Override
-    public List<String> parse(StringReader reader) {
-        final String text = reader.getRemaining();
-        reader.setCursor(reader.getTotalLength());
-        return new ArrayList<>(Arrays.asList(text.split(" ")));
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/generation/FabricChunkGeneratorWrapper.java

@@ -1,25 +1,29 @@
-package com.dfsek.terra.fabric.world.generator;
+package com.dfsek.terra.fabric.generation;
 
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.api.platform.world.generator.ChunkData;
 import com.dfsek.terra.api.platform.world.generator.GeneratorWrapper;
 import com.dfsek.terra.api.util.FastRandom;
 import com.dfsek.terra.api.world.generation.TerraChunkGenerator;
+import com.dfsek.terra.api.world.locate.AsyncStructureFinder;
 import com.dfsek.terra.config.pack.ConfigPack;
+import com.dfsek.terra.fabric.FabricAdapter;
 import com.dfsek.terra.fabric.TerraFabricPlugin;
-import com.dfsek.terra.fabric.world.TerraBiomeSource;
-import com.dfsek.terra.fabric.world.handles.world.FabricSeededWorldAccess;
+import com.dfsek.terra.world.TerraWorld;
 import com.dfsek.terra.world.generation.generators.DefaultChunkGenerator3D;
-import com.dfsek.terra.world.population.CavePopulator;
-import com.dfsek.terra.world.population.FloraPopulator;
-import com.dfsek.terra.world.population.OrePopulator;
-import com.dfsek.terra.world.population.StructurePopulator;
-import com.dfsek.terra.world.population.TreePopulator;
+import com.dfsek.terra.world.generation.math.samplers.Sampler;
+import com.dfsek.terra.world.population.items.TerraStructure;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.jafama.FastMath;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
+import net.minecraft.server.world.ServerWorld;
 import net.minecraft.structure.StructureManager;
+import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.ChunkPos;
 import net.minecraft.util.registry.DynamicRegistryManager;
+import net.minecraft.util.registry.Registry;
 import net.minecraft.world.BlockView;
 import net.minecraft.world.ChunkRegion;
 import net.minecraft.world.Heightmap;
@@ -31,6 +35,12 @@ import net.minecraft.world.gen.StructureAccessor;
 import net.minecraft.world.gen.chunk.ChunkGenerator;
 import net.minecraft.world.gen.chunk.StructuresConfig;
 import net.minecraft.world.gen.chunk.VerticalBlockSample;
+import net.minecraft.world.gen.feature.StructureFeature;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
 
 public class FabricChunkGeneratorWrapper extends ChunkGenerator implements GeneratorWrapper {
     private final long seed;
@@ -77,6 +87,28 @@ public class FabricChunkGeneratorWrapper extends ChunkGenerator implements Gener
 
     }
 
+    @Nullable
+    @Override
+    public BlockPos locateStructure(ServerWorld world, StructureFeature<?> feature, BlockPos center, int radius, boolean skipExistingChunks) {
+        String name = Objects.requireNonNull(Registry.STRUCTURE_FEATURE.getId(feature)).toString();
+        TerraWorld terraWorld = TerraFabricPlugin.getInstance().getWorld((World) world);
+        TerraStructure located = pack.getStructure(pack.getTemplate().getLocatable().get(name));
+        if(located != null) {
+            CompletableFuture<BlockPos> result = new CompletableFuture<>();
+            AsyncStructureFinder finder = new AsyncStructureFinder(terraWorld.getBiomeProvider(), located, FabricAdapter.adapt(center).toLocation((World) world), 0, 500, location -> {
+                result.complete(FabricAdapter.adapt(location));
+            }, TerraFabricPlugin.getInstance());
+            finder.run(); // Do this synchronously.
+            try {
+                return result.get();
+            } catch(InterruptedException | ExecutionException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        TerraFabricPlugin.getInstance().logger().warning("No overrides are defined for \"" + name + "\"");
+        return null;
+    }
+
     @Override
     public void generateFeatures(ChunkRegion region, StructureAccessor accessor) {
         super.generateFeatures(region, accessor);
@@ -84,8 +116,7 @@ public class FabricChunkGeneratorWrapper extends ChunkGenerator implements Gener
 
     @Override
     public void populateNoise(WorldAccess world, StructureAccessor accessor, Chunk chunk) {
-        FabricSeededWorldAccess worldAccess = new FabricSeededWorldAccess(world, seed, this);
-        delegate.generateChunkData(worldAccess, new FastRandom(), chunk.getPos().x, chunk.getPos().z, new FabricChunkData(chunk));
+        delegate.generateChunkData((World) world, new FastRandom(), chunk.getPos().x, chunk.getPos().z, (ChunkData) chunk);
     }
 
     @Override
@@ -107,7 +138,18 @@ public class FabricChunkGeneratorWrapper extends ChunkGenerator implements Gener
 
     @Override
     public int getHeight(int x, int z, Heightmap.Type heightmapType) {
-        return 0;
+        TerraWorld world = TerraFabricPlugin.getInstance().getWorld(seed);
+        Sampler sampler = world.getConfig().getSamplerCache().getChunk(FastMath.floorDiv(x, 16), FastMath.floorDiv(z, 16));
+        int cx = FastMath.floorMod(x, 16);
+        int cz = FastMath.floorMod(z, 16);
+
+        int height = world.getWorld().getMaxHeight();
+
+        while (height >= 0 && sampler.sample(cx, height - 1, cz) < 0) {
+            height--;
+        }
+
+        return height;
     }
 
     @Override

platforms/fabric/src/main/java/com/dfsek/terra/fabric/generation/PopulatorFeature.java

@@ -1,10 +1,8 @@
-package com.dfsek.terra.fabric.world.features;
+package com.dfsek.terra.fabric.generation;
 
-import com.dfsek.terra.fabric.world.generator.FabricChunkGenerator;
-import com.dfsek.terra.fabric.world.generator.FabricChunkGeneratorWrapper;
-import com.dfsek.terra.fabric.world.handles.FabricWorld;
-import com.dfsek.terra.fabric.world.handles.chunk.FabricChunkWorldAccess;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldAccess;
+import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
 import com.mojang.serialization.Codec;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.StructureWorldAccess;
@@ -25,9 +23,7 @@ public class PopulatorFeature extends Feature<DefaultFeatureConfig> {
     @Override
     public boolean generate(StructureWorldAccess world, ChunkGenerator chunkGenerator, Random random, BlockPos pos, DefaultFeatureConfig config) {
         FabricChunkGeneratorWrapper gen = (FabricChunkGeneratorWrapper) chunkGenerator;
-        FabricChunkWorldAccess chunk = new FabricChunkWorldAccess(world, pos.getX() >> 4, pos.getZ() >> 4);
-        FabricWorld world1 = new FabricWorld(world.toServerWorld(), new FabricChunkGenerator(chunkGenerator));
-        gen.getHandle().getPopulators().forEach(populator -> populator.populate(world1, chunk));
+        gen.getHandle().getPopulators().forEach(populator -> populator.populate((World) world, (Chunk) world));
         return true;
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/generation/TerraBiomeSource.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.fabric.world;
+package com.dfsek.terra.fabric.generation;
 
 import com.dfsek.terra.api.world.biome.UserDefinedBiome;
 import com.dfsek.terra.api.world.biome.provider.BiomeProvider;

platforms/fabric/src/main/java/com/dfsek/terra/fabric/handle/FabricItemHandle.java

@@ -1,9 +1,8 @@
-package com.dfsek.terra.fabric.inventory;
+package com.dfsek.terra.fabric.handle;
 
 import com.dfsek.terra.api.platform.handle.ItemHandle;
 import com.dfsek.terra.api.platform.inventory.Item;
 import com.dfsek.terra.api.platform.inventory.item.Enchantment;
-import com.dfsek.terra.fabric.world.FabricAdapter;
 import com.mojang.brigadier.StringReader;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import net.minecraft.command.argument.ItemStackArgumentType;
@@ -18,7 +17,7 @@ public class FabricItemHandle implements ItemHandle {
     @Override
     public Item createItem(String data) {
         try {
-            return FabricAdapter.adapt(new ItemStackArgumentType().parse(new StringReader(data)).getItem());
+            return (Item) new ItemStackArgumentType().parse(new StringReader(data)).getItem();
         } catch(CommandSyntaxException e) {
             throw new IllegalArgumentException("Invalid item data \"" + data + "\"", e);
         }
@@ -26,11 +25,11 @@ public class FabricItemHandle implements ItemHandle {
 
     @Override
     public Enchantment getEnchantment(String id) {
-        return FabricAdapter.adapt(Registry.ENCHANTMENT.get(Identifier.tryParse(id)));
+        return (Enchantment) (Registry.ENCHANTMENT.get(Identifier.tryParse(id)));
     }
 
     @Override
     public Set<Enchantment> getEnchantments() {
-        return Registry.ENCHANTMENT.stream().map(FabricAdapter::adapt).collect(Collectors.toSet());
+        return Registry.ENCHANTMENT.stream().map(enchantment -> (Enchantment) enchantment).collect(Collectors.toSet());
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/handle/FabricWorldHandle.java

@@ -1,8 +1,9 @@
-package com.dfsek.terra.fabric.world;
+package com.dfsek.terra.fabric.handle;
 
 import com.dfsek.terra.api.platform.entity.EntityType;
 import com.dfsek.terra.api.platform.handle.WorldHandle;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
+import com.dfsek.terra.fabric.FabricAdapter;
+import com.dfsek.terra.fabric.block.FabricBlockData;
 import com.mojang.brigadier.StringReader;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import net.minecraft.block.BlockState;
@@ -30,6 +31,6 @@ public class FabricWorldHandle implements WorldHandle {
     public EntityType getEntity(String id) {
         Identifier identifier = Identifier.tryParse(id);
         if(identifier == null) identifier = Identifier.tryParse("minecraft:" + id.toLowerCase(Locale.ROOT));
-        return FabricAdapter.adapt(Registry.ENTITY_TYPE.get(identifier));
+        return (EntityType) Registry.ENTITY_TYPE.get(identifier);
     }
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/inventory/FabricInventory.java

@@ -1,35 +0,0 @@
-package com.dfsek.terra.fabric.inventory;
-
-import com.dfsek.terra.api.platform.inventory.Inventory;
-import com.dfsek.terra.api.platform.inventory.ItemStack;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import net.minecraft.item.Items;
-
-public class FabricInventory implements Inventory {
-    private final net.minecraft.inventory.Inventory delegate;
-
-    public FabricInventory(net.minecraft.inventory.Inventory delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public net.minecraft.inventory.Inventory getHandle() {
-        return delegate;
-    }
-
-    @Override
-    public int getSize() {
-        return delegate.size();
-    }
-
-    @Override
-    public ItemStack getItem(int slot) {
-        net.minecraft.item.ItemStack itemStack = delegate.getStack(slot);
-        return itemStack.getItem() == Items.AIR ? null : FabricAdapter.adapt(itemStack);
-    }
-
-    @Override
-    public void setItem(int slot, ItemStack newStack) {
-        delegate.setStack(slot, FabricAdapter.adapt(newStack));
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/GeneratorOptionsMixin.java

@@ -2,8 +2,8 @@ package com.dfsek.terra.fabric.mixin;
 
 import com.dfsek.terra.config.pack.ConfigPack;
 import com.dfsek.terra.fabric.TerraFabricPlugin;
-import com.dfsek.terra.fabric.world.TerraBiomeSource;
-import com.dfsek.terra.fabric.world.generator.FabricChunkGeneratorWrapper;
+import com.dfsek.terra.fabric.generation.TerraBiomeSource;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
 import com.google.common.base.MoreObjects;
 import net.minecraft.util.registry.DynamicRegistryManager;
 import net.minecraft.util.registry.Registry;
@@ -13,16 +13,17 @@ import net.minecraft.world.dimension.DimensionOptions;
 import net.minecraft.world.dimension.DimensionType;
 import net.minecraft.world.gen.GeneratorOptions;
 import net.minecraft.world.gen.chunk.ChunkGeneratorSettings;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 import java.util.Properties;
 import java.util.Random;
 
-// Mixins commented out until loom fixes multi-project builds.
-
-//@Mixin(GeneratorOptions.class)
-public class MixinGeneratorOptions {
-    //@Inject(method = "fromProperties(Lnet/minecraft/util/registry/DynamicRegistryManager;Ljava/util/Properties;)Lnet/minecraft/world/gen/GeneratorOptions;", at = @At("HEAD"), cancellable = true)
+@Mixin(GeneratorOptions.class)
+public abstract class GeneratorOptionsMixin {
+    @Inject(method = "fromProperties(Lnet/minecraft/util/registry/DynamicRegistryManager;Ljava/util/Properties;)Lnet/minecraft/world/gen/GeneratorOptions;", at = @At("HEAD"), cancellable = true)
     private static void fromProperties(DynamicRegistryManager dynamicRegistryManager, Properties properties, CallbackInfoReturnable<GeneratorOptions> cir) {
         if(properties.get("level-type") == null) {
             return;

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/access/BiomeEffectsAccessor.java

@@ -0,0 +1,31 @@
+package com.dfsek.terra.fabric.mixin.access;
+
+import net.minecraft.world.biome.BiomeEffects;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+import java.util.Optional;
+
+@Mixin(BiomeEffects.class)
+public interface BiomeEffectsAccessor {
+    @Accessor("fogColor")
+    int getFogColor();
+
+    @Accessor("waterColor")
+    int getWaterColor();
+
+    @Accessor("waterFogColor")
+    int getWaterFogColor();
+
+    @Accessor("skyColor")
+    int getSkyColor();
+
+    @Accessor("foliageColor")
+    Optional<Integer> getFoliageColor();
+
+    @Accessor("grassColor")
+    Optional<Integer> getGrassColor();
+
+    @Accessor("grassColorModifier")
+    BiomeEffects.GrassColorModifier getGrassColorModifier();
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/access/GeneratorTypeAccessor.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.fabric.mixin;
+package com.dfsek.terra.fabric.mixin.access;
 
 import net.minecraft.client.world.GeneratorType;
 import net.minecraft.text.Text;
@@ -10,12 +10,12 @@ import java.util.List;
 
 @Mixin(GeneratorType.class)
 public interface GeneratorTypeAccessor {
-    @Accessor
-    static List<GeneratorType> getVALUES() {
+    @Accessor("VALUES")
+    static List<GeneratorType> getValues() {
         throw new UnsupportedOperationException();
     }
 
     @Mutable
-    @Accessor
+    @Accessor("translationKey")
     void setTranslationKey(Text translationKey);
 }

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/access/MobSpawnerLogicAccessor.java

@@ -0,0 +1,12 @@
+package com.dfsek.terra.fabric.mixin.access;
+
+import net.minecraft.util.Identifier;
+import net.minecraft.world.MobSpawnerLogic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(MobSpawnerLogic.class)
+public interface MobSpawnerLogicAccessor {
+    @Invoker("getEntityId")
+    Identifier callGetEntityId();
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/access/StateAccessor.java

@@ -0,0 +1,17 @@
+package com.dfsek.terra.fabric.mixin.access;
+
+import net.minecraft.state.State;
+import net.minecraft.state.property.Property;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+import java.util.Map;
+import java.util.function.Function;
+
+@Mixin(State.class)
+public interface StateAccessor {
+    @Accessor("PROPERTY_MAP_PRINTER")
+    static Function<Map.Entry<Property<?>, Comparable<?>>, String> getPropertyMapPrinter() {
+        throw new UnsupportedOperationException();
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/BiomeMixin.java

@@ -0,0 +1,14 @@
+package com.dfsek.terra.fabric.mixin.implementations;
+
+import net.minecraft.world.biome.Biome;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(Biome.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.world.Biome.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class BiomeMixin {
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/ChunkGeneratorMixin.java

@@ -0,0 +1,14 @@
+package com.dfsek.terra.fabric.mixin.implementations;
+
+import net.minecraft.world.gen.chunk.ChunkGenerator;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(ChunkGenerator.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.world.generator.ChunkGenerator.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ChunkGeneratorMixin {
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/ConfiguredFeatureMixin.java

@@ -0,0 +1,42 @@
+package com.dfsek.terra.fabric.mixin.implementations;
+
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.world.Tree;
+import com.dfsek.terra.api.util.collections.MaterialSet;
+import com.dfsek.terra.fabric.TerraFabricPlugin;
+import com.dfsek.terra.profiler.ProfileFrame;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.registry.BuiltinRegistries;
+import net.minecraft.world.StructureWorldAccess;
+import net.minecraft.world.gen.chunk.ChunkGenerator;
+import net.minecraft.world.gen.feature.ConfiguredFeature;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Locale;
+import java.util.Random;
+
+@Mixin(ConfiguredFeature.class)
+@Implements(@Interface(iface = Tree.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ConfiguredFeatureMixin {
+    @Shadow
+    public abstract boolean generate(StructureWorldAccess world, ChunkGenerator chunkGenerator, Random random, BlockPos pos);
+
+    @SuppressWarnings({"ConstantConditions", "try"})
+    public boolean terra$plant(Location l, Random r) {
+        String id = BuiltinRegistries.CONFIGURED_FEATURE.getId((ConfiguredFeature<?, ?>) (Object) this).toString();
+        try(ProfileFrame ignore = TerraFabricPlugin.getInstance().getProfiler().profile("fabric_tree:" + id.toLowerCase(Locale.ROOT))) {
+            StructureWorldAccess fabricWorldAccess = ((StructureWorldAccess) l.getWorld());
+            ChunkGenerator generatorWrapper = (ChunkGenerator) l.getWorld().getGenerator();
+            return generate(fabricWorldAccess, generatorWrapper, r, new BlockPos(l.getBlockX(), l.getBlockY(), l.getBlockZ()));
+        }
+    }
+
+    public MaterialSet terra$getSpawnable() {
+        return MaterialSet.get(TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:grass_block"),
+                TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:podzol"),
+                TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:mycelium"));
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/block/BlockEntityMixin.java

@@ -0,0 +1,60 @@
+package com.dfsek.terra.fabric.mixin.implementations.block;
+
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.block.state.BlockState;
+import com.dfsek.terra.fabric.FabricAdapter;
+import com.dfsek.terra.fabric.block.FabricBlock;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(BlockEntity.class)
+@Implements(@Interface(iface = BlockState.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class BlockEntityMixin {
+    @Shadow
+    protected BlockPos pos;
+    @Shadow
+    @Nullable
+    protected World world;
+
+    @Shadow
+    public abstract net.minecraft.block.BlockState getCachedState();
+
+    @Shadow
+    public abstract boolean hasWorld();
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public Block terra$getBlock() {
+        return new FabricBlock(pos, world);
+    }
+
+    public int terra$getX() {
+        return pos.getX();
+    }
+
+    public int terra$getY() {
+        return pos.getY();
+    }
+
+    public int terra$getZ() {
+        return pos.getZ();
+    }
+
+    public BlockData terra$getBlockData() {
+        return FabricAdapter.adapt(getCachedState());
+    }
+
+    public boolean terra$update(boolean applyPhysics) {
+        if(hasWorld()) world.getChunk(pos).setBlockEntity(pos, (BlockEntity) (Object) this);
+        return true;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/block/BlockMixin.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.fabric.mixin.implementations.block;
+
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.block.BlockType;
+import com.dfsek.terra.fabric.FabricAdapter;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(Block.class)
+@Implements(@Interface(iface = BlockType.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class BlockMixin {
+    @Shadow
+    private BlockState defaultState;
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public BlockData terra$getDefaultData() {
+        return FabricAdapter.adapt(defaultState);
+    }
+
+    public boolean terra$isSolid() {
+        return defaultState.isOpaque();
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public boolean terra$isWater() {
+        return ((Object) this) == Blocks.WATER;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/block/state/LootableContainerBlockEntityMixin.java

@@ -0,0 +1,21 @@
+package com.dfsek.terra.fabric.mixin.implementations.block.state;
+
+import com.dfsek.terra.api.platform.block.state.Container;
+import com.dfsek.terra.api.platform.inventory.Inventory;
+import com.dfsek.terra.fabric.mixin.implementations.block.BlockEntityMixin;
+import net.minecraft.block.entity.LootableContainerBlockEntity;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(LootableContainerBlockEntity.class)
+@Implements(@Interface(iface = Container.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class LootableContainerBlockEntityMixin extends BlockEntityMixin {
+    public Inventory terra$getInventory() {
+        return (Inventory) this;
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/block/state/MobSpawnerBlockEntityMixin.java

@@ -0,0 +1,119 @@
+package com.dfsek.terra.fabric.mixin.implementations.block.state;
+
+import com.dfsek.terra.api.platform.block.state.MobSpawner;
+import com.dfsek.terra.api.platform.block.state.SerialState;
+import com.dfsek.terra.api.platform.entity.EntityType;
+import com.dfsek.terra.fabric.TerraFabricPlugin;
+import com.dfsek.terra.fabric.mixin.access.MobSpawnerLogicAccessor;
+import net.minecraft.block.entity.MobSpawnerBlockEntity;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.world.MobSpawnerLogic;
+import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(MobSpawnerBlockEntity.class)
+@Implements(@Interface(iface = MobSpawner.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class MobSpawnerBlockEntityMixin {
+    @Shadow
+    public abstract MobSpawnerLogic getLogic();
+
+    public EntityType terra$getSpawnedType() {
+        return (EntityType) Registry.ENTITY_TYPE.get(((MobSpawnerLogicAccessor) getLogic()).callGetEntityId());
+    }
+
+    public void terra$setSpawnedType(@NotNull EntityType creatureType) {
+        getLogic().setEntityId((net.minecraft.entity.EntityType<?>) creatureType);
+    }
+
+    public int terra$getDelay() {
+        return 0;
+    }
+
+    public void terra$setDelay(int delay) {
+
+    }
+
+    public int terra$getMinSpawnDelay() {
+        return 0;
+    }
+
+    public void terra$setMinSpawnDelay(int delay) {
+
+    }
+
+    public int terra$getMaxSpawnDelay() {
+        return 0;
+    }
+
+    public void terra$setMaxSpawnDelay(int delay) {
+
+    }
+
+    public int terra$getSpawnCount() {
+        return 0;
+    }
+
+    public void terra$setSpawnCount(int spawnCount) {
+
+    }
+
+    public int terra$getMaxNearbyEntities() {
+        return 0;
+    }
+
+    public void terra$setMaxNearbyEntities(int maxNearbyEntities) {
+
+    }
+
+    public int terra$getRequiredPlayerRange() {
+        return 0;
+    }
+
+    public void terra$setRequiredPlayerRange(int requiredPlayerRange) {
+
+    }
+
+    public int terra$getSpawnRange() {
+        return 0;
+    }
+
+    public void terra$setSpawnRange(int spawnRange) {
+
+    }
+
+    public void terra$applyState(String state) {
+        SerialState.parse(state).forEach((k, v) -> {
+            switch(k) {
+                case "type":
+                    terra$setSpawnedType(TerraFabricPlugin.getInstance().getWorldHandle().getEntity(v));
+                    return;
+                case "delay":
+                    terra$setDelay(Integer.parseInt(v));
+                    return;
+                case "min_delay":
+                    terra$setMinSpawnDelay(Integer.parseInt(v));
+                    return;
+                case "max_delay":
+                    terra$setMaxSpawnDelay(Integer.parseInt(v));
+                    return;
+                case "spawn_count":
+                    terra$setSpawnCount(Integer.parseInt(v));
+                    return;
+                case "spawn_range":
+                    terra$setSpawnRange(Integer.parseInt(v));
+                    return;
+                case "max_nearby":
+                    terra$setMaxNearbyEntities(Integer.parseInt(v));
+                    return;
+                case "required_player_range":
+                    terra$setRequiredPlayerRange(Integer.parseInt(v));
+                    return;
+                default:
+                    throw new IllegalArgumentException("Invalid property: " + k);
+            }
+        });
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/block/state/SignBlockEntityMixin.java

@@ -0,0 +1,47 @@
+package com.dfsek.terra.fabric.mixin.implementations.block.state;
+
+import com.dfsek.terra.api.platform.block.state.SerialState;
+import com.dfsek.terra.api.platform.block.state.Sign;
+import net.minecraft.block.entity.SignBlockEntity;
+import net.minecraft.text.LiteralText;
+import net.minecraft.text.Text;
+import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(SignBlockEntity.class)
+@Implements(@Interface(iface = Sign.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class SignBlockEntityMixin {
+    @Shadow
+    public abstract void setTextOnRow(int row, Text text);
+
+    @Shadow
+    @Final
+    private Text[] text;
+
+    public @NotNull String[] terra$getLines() {
+        String[] lines = new String[text.length];
+        for(int i = 0; i < text.length; i++) {
+            lines[i] = text[i].asString();
+        }
+        return lines;
+    }
+
+    public @NotNull String terra$getLine(int index) throws IndexOutOfBoundsException {
+        return text[index].asString();
+    }
+
+    public void terra$setLine(int index, @NotNull String line) throws IndexOutOfBoundsException {
+        setTextOnRow(index, new LiteralText(line));
+    }
+
+    public void terra$applyState(String state) {
+        SerialState.parse(state).forEach((k, v) -> {
+            if(!k.startsWith("text")) throw new IllegalArgumentException("Invalid property: " + k);
+            terra$setLine(Integer.parseInt(k.substring(4)), v);
+        });
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/chunk/ChunkRegionMixin.java

@@ -0,0 +1,57 @@
+package com.dfsek.terra.fabric.mixin.implementations.chunk;
+
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.fabric.block.FabricBlock;
+import com.dfsek.terra.fabric.block.FabricBlockData;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.ChunkRegion;
+import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ChunkRegion.class)
+@Implements(@Interface(iface = Chunk.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ChunkRegionMixin {
+    @Final
+    @Shadow
+    private int centerChunkX;
+
+    @Final
+    @Shadow
+    private int centerChunkZ;
+
+    public int terra$getX() {
+        return centerChunkX;
+    }
+
+    public int terra$getZ() {
+        return centerChunkZ;
+    }
+
+    public World terra$getWorld() {
+        return (World) this;
+    }
+
+    public Block terra$getBlock(int x, int y, int z) {
+        BlockPos pos = new BlockPos(x + (centerChunkX << 4), y, z + (centerChunkZ << 4));
+        return new FabricBlock(pos, (ChunkRegion) (Object) this);
+    }
+
+    public @NotNull BlockData terra$getBlockData(int x, int y, int z) {
+        return terra$getBlock(x, y, z).getBlockData();
+    }
+
+    public void terra$setBlock(int x, int y, int z, @NotNull BlockData blockData) {
+        ((ChunkRegion) (Object) this).setBlockState(new BlockPos(x + (centerChunkX << 4), y, z + (centerChunkZ << 4)), ((FabricBlockData) blockData).getHandle(), 0);
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/chunk/WorldChunkMixin.java

@@ -0,0 +1,53 @@
+package com.dfsek.terra.fabric.mixin.implementations.chunk;
+
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.fabric.block.FabricBlock;
+import com.dfsek.terra.fabric.block.FabricBlockData;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.chunk.WorldChunk;
+import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(WorldChunk.class)
+@Implements(@Interface(iface = Chunk.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class WorldChunkMixin {
+    @Final
+    @Shadow
+    private net.minecraft.world.World world;
+
+    public int terra$getX() {
+        return ((net.minecraft.world.chunk.Chunk) this).getPos().x;
+    }
+
+    public int terra$getZ() {
+        return ((net.minecraft.world.chunk.Chunk) this).getPos().z;
+    }
+
+    public World terra$getWorld() {
+        return (World) world;
+    }
+
+    public Block terra$getBlock(int x, int y, int z) {
+        BlockPos pos = new BlockPos(x + (terra$getX() << 4), y, z + (terra$getZ() << 4));
+        return new FabricBlock(pos, world);
+    }
+
+    public @NotNull BlockData terra$getBlockData(int x, int y, int z) {
+        return terra$getBlock(x, y, z).getBlockData();
+    }
+
+    public void terra$setBlock(int x, int y, int z, @NotNull BlockData blockData) {
+        ((net.minecraft.world.chunk.Chunk) this).setBlockState(new BlockPos(x, y, z), ((FabricBlockData) blockData).getHandle(), false);
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/chunk/data/ProtoChunkMixin.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.fabric.mixin.implementations.chunk.data;
+
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.world.generator.ChunkData;
+import com.dfsek.terra.fabric.block.FabricBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.chunk.ProtoChunk;
+import org.jetbrains.annotations.NotNull;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ProtoChunk.class)
+@Implements(@Interface(iface = ChunkData.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ProtoChunkMixin {
+    @Shadow
+    public abstract BlockState getBlockState(BlockPos pos);
+
+    public @NotNull BlockData terra$getBlockData(int x, int y, int z) {
+        return new FabricBlockData(getBlockState(new BlockPos(x, y, z)));
+    }
+
+    public void terra$setBlock(int x, int y, int z, @NotNull BlockData blockData) {
+        ((net.minecraft.world.chunk.Chunk) this).setBlockState(new BlockPos(x, y, z), ((FabricBlockData) blockData).getHandle(), false);
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public int terra$getMaxHeight() {
+        return 255; // TODO: 1.17 - Implement dynamic height.
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/entity/EntityMixin.java

@@ -0,0 +1,51 @@
+package com.dfsek.terra.fabric.mixin.implementations.entity;
+
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.fabric.FabricAdapter;
+import net.minecraft.entity.Entity;
+import net.minecraft.text.LiteralText;
+import net.minecraft.text.Text;
+import net.minecraft.util.math.BlockPos;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.UUID;
+
+@Mixin(Entity.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.entity.Entity.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class EntityMixin {
+    @Shadow
+    public net.minecraft.world.World world;
+
+    @Shadow
+    private BlockPos blockPos;
+
+    @Shadow
+    public abstract void teleport(double destX, double destY, double destZ);
+
+    @Shadow
+    public abstract void sendSystemMessage(Text message, UUID senderUuid);
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public Location terra$getLocation() {
+        return new Location((World) world, FabricAdapter.adapt(blockPos));
+    }
+
+    public void terra$setLocation(Location location) {
+        teleport(location.getX(), location.getY(), location.getZ());
+    }
+
+    public World terra$getWorld() {
+        return (World) world;
+    }
+
+    public void terra$sendMessage(String message) {
+        sendSystemMessage(new LiteralText(message), UUID.randomUUID()); // TODO: look into how this actually works and make it less jank
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/entity/EntityTypeMixin.java

@@ -0,0 +1,14 @@
+package com.dfsek.terra.fabric.mixin.implementations.entity;
+
+import net.minecraft.entity.EntityType;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(EntityType.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.entity.EntityType.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class EntityTypeMixin {
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/entity/PlayerEntityMixin.java

@@ -0,0 +1,13 @@
+package com.dfsek.terra.fabric.mixin.implementations.entity;
+
+import com.dfsek.terra.api.platform.entity.Player;
+import net.minecraft.entity.player.PlayerEntity;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(PlayerEntity.class)
+@Implements(@Interface(iface = Player.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class PlayerEntityMixin extends EntityMixin {
+
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/entity/ServerCommandSourceMixin.java

@@ -0,0 +1,25 @@
+package com.dfsek.terra.fabric.mixin.implementations.entity;
+
+import com.dfsek.terra.api.platform.CommandSender;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.text.LiteralText;
+import net.minecraft.text.Text;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ServerCommandSource.class)
+@Implements(@Interface(iface = CommandSender.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ServerCommandSourceMixin {
+    @Shadow
+    public abstract void sendFeedback(Text message, boolean broadcastToOps);
+
+    public void terra$sendMessage(String message) {
+        sendFeedback(new LiteralText(message), true);
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/LockableContainerBlockEntityMixin.java

@@ -0,0 +1,32 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory;
+
+import com.dfsek.terra.api.platform.inventory.Inventory;
+import com.dfsek.terra.api.platform.inventory.ItemStack;
+import net.minecraft.block.entity.LockableContainerBlockEntity;
+import net.minecraft.item.Items;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(LockableContainerBlockEntity.class)
+@Implements(@Interface(iface = Inventory.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public class LockableContainerBlockEntityMixin {
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public int terra$getSize() {
+        return ((LockableContainerBlockEntity) (Object) this).size();
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public ItemStack terra$getItem(int slot) {
+        net.minecraft.item.ItemStack itemStack = ((LockableContainerBlockEntity) (Object) this).getStack(slot);
+        return itemStack.getItem() == Items.AIR ? null : (ItemStack) (Object) itemStack;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public void terra$setItem(int slot, ItemStack newStack) {
+        ((LockableContainerBlockEntity) (Object) this).setStack(slot, (net.minecraft.item.ItemStack) (Object) newStack);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/item/ItemMixin.java

@@ -0,0 +1,28 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory.item;
+
+import com.dfsek.terra.api.platform.inventory.ItemStack;
+import net.minecraft.item.Item;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(Item.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.inventory.Item.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ItemMixin {
+    @Shadow
+    public abstract int getMaxDamage();
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public ItemStack terra$newItemStack(int amount) {
+        return (ItemStack) (Object) new net.minecraft.item.ItemStack((Item) (Object) this, amount);
+    }
+
+    public double terra$getMaxDurability() {
+        return getMaxDamage();
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/item/ItemStackMixin.java

@@ -0,0 +1,61 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory.item;
+
+import com.dfsek.terra.api.platform.inventory.Item;
+import com.dfsek.terra.api.platform.inventory.item.ItemMeta;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.CompoundTag;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Intrinsic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ItemStack.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.inventory.ItemStack.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ItemStackMixin {
+    @Shadow
+    public abstract int getCount();
+
+    @Shadow
+    public abstract void setCount(int count);
+
+    @Shadow
+    public abstract net.minecraft.item.Item getItem();
+
+    @Shadow
+    public abstract boolean isDamageable();
+
+    @Shadow
+    public abstract void setTag(@Nullable CompoundTag tag);
+
+    public int terra$getAmount() {
+        return getCount();
+    }
+
+    public void terra$setAmount(int i) {
+        setCount(i);
+    }
+
+    public Item terra$getType() {
+        return (Item) getItem();
+    }
+
+    public ItemMeta terra$getItemMeta() {
+        return (ItemMeta) this;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public void terra$setItemMeta(ItemMeta meta) {
+        setTag(((ItemStack) (Object) meta).getTag());
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    @Intrinsic
+    public boolean terra$isDamageable() {
+        return isDamageable();
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/meta/EnchantmentMixin.java

@@ -0,0 +1,38 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory.meta;
+
+import com.dfsek.terra.api.platform.inventory.ItemStack;
+import net.minecraft.enchantment.Enchantment;
+import net.minecraft.util.registry.Registry;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Objects;
+
+@Mixin(Enchantment.class)
+@Implements(@Interface(iface = com.dfsek.terra.api.platform.inventory.item.Enchantment.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class EnchantmentMixin {
+    @Shadow
+    public abstract boolean isAcceptableItem(net.minecraft.item.ItemStack stack);
+
+    @Shadow
+    public abstract boolean canCombine(Enchantment other);
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    public boolean terra$canEnchantItem(ItemStack itemStack) {
+        return isAcceptableItem((net.minecraft.item.ItemStack) (Object) itemStack);
+    }
+
+    public String terra$getID() {
+        return Objects.requireNonNull(Registry.ENCHANTMENT.getId((Enchantment) (Object) this)).toString();
+    }
+
+    public boolean terra$conflictsWith(com.dfsek.terra.api.platform.inventory.item.Enchantment other) {
+        return !canCombine((Enchantment) other);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/meta/ItemStackDamageableMixin.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory.meta;
+
+import com.dfsek.terra.api.platform.inventory.item.Damageable;
+import net.minecraft.item.ItemStack;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Intrinsic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ItemStack.class)
+@Implements(@Interface(iface = Damageable.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ItemStackDamageableMixin {
+    @Shadow
+    public abstract boolean isDamaged();
+
+    @Shadow
+    public abstract int getDamage();
+
+    @Shadow
+    public abstract void setDamage(int damage);
+
+    public boolean terra$hasDamage() {
+        return isDamaged();
+    }
+
+    @Intrinsic
+    public void terra$setDamage(int damage) {
+        setDamage(damage);
+    }
+
+    @Intrinsic
+    public int terra$getDamage() {
+        return getDamage();
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/inventory/meta/ItemStackMetaMixin.java

@@ -0,0 +1,50 @@
+package com.dfsek.terra.fabric.mixin.implementations.inventory.meta;
+
+import com.dfsek.terra.api.platform.inventory.item.Enchantment;
+import com.dfsek.terra.api.platform.inventory.item.ItemMeta;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.util.registry.Registry;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Intrinsic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+@Mixin(ItemStack.class)
+@Implements(@Interface(iface = ItemMeta.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ItemStackMetaMixin {
+    @Shadow
+    public abstract boolean hasEnchantments();
+
+    @Shadow
+    public abstract ListTag getEnchantments();
+
+    @Shadow
+    public abstract void addEnchantment(net.minecraft.enchantment.Enchantment enchantment, int level);
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    @Intrinsic(displace = true)
+    public Map<Enchantment, Integer> terra$getEnchantments() {
+        if(!hasEnchantments()) return Collections.emptyMap();
+        Map<Enchantment, Integer> map = new HashMap<>();
+
+        getEnchantments().forEach(enchantment -> {
+            CompoundTag eTag = (CompoundTag) enchantment;
+            map.put((Enchantment) Registry.ENCHANTMENT.get(eTag.getInt("id")), eTag.getInt("lvl"));
+        });
+        return map;
+    }
+
+    public void terra$addEnchantment(Enchantment enchantment, int level) {
+        addEnchantment((net.minecraft.enchantment.Enchantment) enchantment, level);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Mixins in this package implement Terra
+ * interfaces in Minecraft classes.
+ */
+package com.dfsek.terra.fabric.mixin.implementations;

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/world/ChunkRegionMixin.java

@@ -0,0 +1,109 @@
+package com.dfsek.terra.fabric.mixin.implementations.world;
+
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.entity.Entity;
+import com.dfsek.terra.api.platform.entity.EntityType;
+import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.api.platform.world.generator.ChunkGenerator;
+import com.dfsek.terra.api.platform.world.generator.GeneratorWrapper;
+import com.dfsek.terra.api.world.generation.TerraChunkGenerator;
+import com.dfsek.terra.fabric.block.FabricBlock;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.ChunkRegion;
+import net.minecraft.world.ServerWorldAccess;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Intrinsic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ChunkRegion.class)
+@Implements(@Interface(iface = World.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ChunkRegionMixin {
+    @Shadow
+    @Final
+    private ServerWorld world;
+
+    @Shadow
+    @Final
+    private long seed;
+
+    public int terra$getMaxHeight() {
+        return ((ChunkRegion) (Object) this).getDimensionHeight();
+    }
+
+    @SuppressWarnings("deprecation")
+    public ChunkGenerator terra$getGenerator() {
+        return (ChunkGenerator) ((ChunkRegion) (Object) this).toServerWorld().getChunkManager().getChunkGenerator();
+    }
+
+    public Chunk terra$getChunkAt(int x, int z) {
+        return (Chunk) ((ChunkRegion) (Object) this).getChunk(x, z);
+    }
+
+    public Block terra$getBlockAt(int x, int y, int z) {
+        return new FabricBlock(new BlockPos(x, y, z), ((ChunkRegion) (Object) this));
+    }
+
+    @SuppressWarnings("deprecation")
+    public Entity terra$spawnEntity(Location location, EntityType entityType) {
+        net.minecraft.entity.Entity entity = ((net.minecraft.entity.EntityType<?>) entityType).create(((ChunkRegion) (Object) this).toServerWorld());
+        entity.setPos(location.getX(), location.getY(), location.getZ());
+        ((ChunkRegion) (Object) this).spawnEntity(entity);
+        return (Entity) entity;
+    }
+
+    @Intrinsic
+    public long terra$getSeed() {
+        return seed;
+    }
+
+    public int terra$getMinHeight() {
+        return 0;
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public boolean terra$isTerraWorld() {
+        return terra$getGenerator() instanceof GeneratorWrapper;
+    }
+
+    public TerraChunkGenerator terra$getTerraGenerator() {
+        return ((FabricChunkGeneratorWrapper) terra$getGenerator()).getHandle();
+    }
+
+    /**
+     * We need regions delegating to the same world
+     * to have the same hashcode. This
+     * minimizes cache misses.
+     * <p>
+     * This is sort of jank, but shouldn't(tm)
+     * break any other mods, unless they're doing
+     * something they really shouldn't, since
+     * ChunkRegions are not supposed to persist.
+     */
+    @Override
+    public int hashCode() {
+        return world.hashCode();
+    }
+
+    /**
+     * Overridden in the same manner as {@link #hashCode()}
+     *
+     * @param other Another object
+     * @return Whether this world is the same as other.
+     * @see #hashCode()
+     */
+    @Override
+    public boolean equals(Object other) {
+        if(!(other instanceof ServerWorldAccess)) return false;
+        return world.equals(((ServerWorldAccess) other).toServerWorld());
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/mixin/implementations/world/ServerWorldMixin.java

@@ -0,0 +1,86 @@
+package com.dfsek.terra.fabric.mixin.implementations.world;
+
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.entity.Entity;
+import com.dfsek.terra.api.platform.entity.EntityType;
+import com.dfsek.terra.api.platform.world.Chunk;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.api.platform.world.generator.ChunkGenerator;
+import com.dfsek.terra.api.platform.world.generator.GeneratorWrapper;
+import com.dfsek.terra.api.world.generation.TerraChunkGenerator;
+import com.dfsek.terra.fabric.block.FabricBlock;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.ServerWorldAccess;
+import org.spongepowered.asm.mixin.Implements;
+import org.spongepowered.asm.mixin.Interface;
+import org.spongepowered.asm.mixin.Intrinsic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ServerWorld.class)
+@Implements(@Interface(iface = World.class, prefix = "terra$", remap = Interface.Remap.NONE))
+public abstract class ServerWorldMixin {
+    @Shadow
+    public abstract long getSeed();
+
+    public int terra$getMaxHeight() {
+        return ((ServerWorld) (Object) this).getDimensionHeight();
+    }
+
+    public ChunkGenerator terra$getGenerator() {
+        return (ChunkGenerator) ((ServerWorld) (Object) this).getChunkManager().getChunkGenerator();
+    }
+
+    public Chunk terra$getChunkAt(int x, int z) {
+        return (Chunk) ((ServerWorld) (Object) this).getChunk(x, z);
+    }
+
+    public Block terra$getBlockAt(int x, int y, int z) {
+        return new FabricBlock(new BlockPos(x, y, z), ((ServerWorld) (Object) this));
+    }
+
+    public Entity terra$spawnEntity(Location location, EntityType entityType) {
+        net.minecraft.entity.Entity entity = ((net.minecraft.entity.EntityType<?>) entityType).create(((ServerWorld) (Object) this));
+        entity.setPos(location.getX(), location.getY(), location.getZ());
+        ((ServerWorld) (Object) this).spawnEntity(entity);
+        return (Entity) entity;
+    }
+
+    @Intrinsic
+    public long terra$getSeed() {
+        return getSeed();
+    }
+
+    public int terra$getMinHeight() {
+        return 0;
+    }
+
+    public Object terra$getHandle() {
+        return this;
+    }
+
+    public boolean terra$isTerraWorld() {
+        return terra$getGenerator() instanceof GeneratorWrapper;
+    }
+
+    public TerraChunkGenerator terra$getTerraGenerator() {
+        return ((FabricChunkGeneratorWrapper) terra$getGenerator()).getHandle();
+    }
+
+    /**
+     * Overridden in the same manner as {@link ChunkRegionMixin#hashCode()}
+     *
+     * @param other Another object
+     * @return Whether this world is the same as other.
+     * @see ChunkRegionMixin#hashCode()
+     */
+    @SuppressWarnings("ConstantConditions")
+    @Override
+    public boolean equals(Object other) {
+        if(!(other instanceof ServerWorldAccess)) return false;
+        return (ServerWorldAccess) this == (((ServerWorldAccess) other).toServerWorld());
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/FabricAdapter.java

@@ -1,127 +0,0 @@
-package com.dfsek.terra.fabric.world;
-
-import com.dfsek.terra.api.math.vector.Vector3;
-import com.dfsek.terra.api.platform.CommandSender;
-import com.dfsek.terra.api.platform.block.BlockFace;
-import com.dfsek.terra.api.platform.block.BlockType;
-import com.dfsek.terra.api.platform.entity.EntityType;
-import com.dfsek.terra.api.platform.inventory.item.Enchantment;
-import com.dfsek.terra.fabric.inventory.FabricEnchantment;
-import com.dfsek.terra.fabric.inventory.FabricItem;
-import com.dfsek.terra.fabric.inventory.FabricItemStack;
-import com.dfsek.terra.fabric.world.block.FabricBlockData;
-import com.dfsek.terra.fabric.world.block.FabricBlockType;
-import com.dfsek.terra.fabric.world.block.data.FabricDirectional;
-import com.dfsek.terra.fabric.world.block.data.FabricMultipleFacing;
-import com.dfsek.terra.fabric.world.block.data.FabricOrientable;
-import com.dfsek.terra.fabric.world.block.data.FabricRotatable;
-import com.dfsek.terra.fabric.world.block.data.FabricSlab;
-import com.dfsek.terra.fabric.world.block.data.FabricStairs;
-import com.dfsek.terra.fabric.world.block.data.FabricWaterlogged;
-import com.dfsek.terra.fabric.world.entity.FabricCommandSender;
-import com.dfsek.terra.fabric.world.entity.FabricEntityType;
-import com.dfsek.terra.fabric.world.entity.FabricPlayer;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldHandle;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockState;
-import net.minecraft.entity.Entity;
-import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.server.command.ServerCommandSource;
-import net.minecraft.state.property.Properties;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.Direction;
-import net.minecraft.world.WorldAccess;
-
-import java.util.Arrays;
-
-public final class FabricAdapter {
-    public static BlockPos adapt(Vector3 v) {
-        return new BlockPos(v.getBlockX(), v.getBlockY(), v.getBlockZ());
-    }
-
-    public static Vector3 adapt(BlockPos pos) {
-        return new Vector3(pos.getX(), pos.getY(), pos.getZ());
-    }
-
-    public static FabricBlockData adapt(BlockState state) {
-        if(state.contains(Properties.STAIR_SHAPE)) return new FabricStairs(state);
-
-        if(state.contains(Properties.SLAB_TYPE)) return new FabricSlab(state);
-
-        if(state.contains(Properties.AXIS)) return new FabricOrientable(state, Properties.AXIS);
-        if(state.contains(Properties.HORIZONTAL_AXIS)) return new FabricOrientable(state, Properties.HORIZONTAL_AXIS);
-
-        if(state.contains(Properties.ROTATION)) return new FabricRotatable(state);
-
-        if(state.contains(Properties.FACING)) return new FabricDirectional(state, Properties.FACING);
-        if(state.contains(Properties.HOPPER_FACING)) return new FabricDirectional(state, Properties.HOPPER_FACING);
-        if(state.contains(Properties.HORIZONTAL_FACING)) return new FabricDirectional(state, Properties.HORIZONTAL_FACING);
-
-        if(state.getProperties().containsAll(Arrays.asList(Properties.NORTH, Properties.SOUTH, Properties.EAST, Properties.WEST)))
-            return new FabricMultipleFacing(state);
-        if(state.contains(Properties.WATERLOGGED)) return new FabricWaterlogged(state);
-        return new FabricBlockData(state);
-    }
-
-    public static CommandSender adapt(ServerCommandSource serverCommandSource) {
-        if(serverCommandSource.getEntity() instanceof PlayerEntity) return new FabricPlayer((PlayerEntity) serverCommandSource.getEntity());
-        return new FabricCommandSender(serverCommandSource);
-    }
-
-    public static Direction adapt(BlockFace face) {
-        switch(face) {
-            case NORTH:
-                return Direction.NORTH;
-            case WEST:
-                return Direction.WEST;
-            case SOUTH:
-                return Direction.SOUTH;
-            case EAST:
-                return Direction.EAST;
-            case UP:
-                return Direction.UP;
-            case DOWN:
-                return Direction.DOWN;
-            default:
-                throw new IllegalArgumentException("Illegal direction: " + face);
-        }
-    }
-
-    public static BlockType adapt(Block block) {
-        return new FabricBlockType(block);
-    }
-
-    public static EntityType adapt(net.minecraft.entity.EntityType<?> entityType) {
-        return new FabricEntityType(entityType);
-    }
-
-    public static net.minecraft.entity.EntityType<? extends Entity> adapt(EntityType entityType) {
-        return ((FabricEntityType) entityType).getHandle();
-    }
-
-    public static ItemStack adapt(com.dfsek.terra.api.platform.inventory.ItemStack itemStack) {
-        return ((FabricItemStack) itemStack).getHandle();
-    }
-
-    public static com.dfsek.terra.api.platform.inventory.ItemStack adapt(ItemStack itemStack) {
-        return new FabricItemStack(itemStack);
-    }
-
-    public static com.dfsek.terra.api.platform.inventory.Item adapt(Item item) {
-        return new FabricItem(item);
-    }
-
-    public static Enchantment adapt(net.minecraft.enchantment.Enchantment enchantment) {
-        return new FabricEnchantment(enchantment);
-    }
-
-    public static net.minecraft.enchantment.Enchantment adapt(Enchantment enchantment) {
-        return ((FabricEnchantment) enchantment).getHandle();
-    }
-
-    public WorldAccess adapt(FabricWorldHandle worldHandle) {
-        return worldHandle.getWorld();
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/FabricTree.java

@@ -1,40 +0,0 @@
-package com.dfsek.terra.fabric.world;
-
-import com.dfsek.terra.api.math.vector.Location;
-import com.dfsek.terra.api.platform.world.Tree;
-import com.dfsek.terra.api.util.collections.MaterialSet;
-import com.dfsek.terra.fabric.TerraFabricPlugin;
-import com.dfsek.terra.fabric.world.generator.FabricChunkGenerator;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldAccess;
-import com.dfsek.terra.profiler.ProfileFrame;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.StructureWorldAccess;
-import net.minecraft.world.gen.chunk.ChunkGenerator;
-import net.minecraft.world.gen.feature.ConfiguredFeature;
-
-import java.util.Locale;
-import java.util.Random;
-
-public class FabricTree implements Tree {
-    private final ConfiguredFeature<?, ?> delegate;
-
-    public FabricTree(ConfiguredFeature<?, ?> delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public boolean plant(Location l, Random r) {
-        try(ProfileFrame ignore = TerraFabricPlugin.getInstance().getProfiler().profile("fabric_tree:" + delegate.toString().toLowerCase(Locale.ROOT))) {
-            FabricWorldAccess fabricWorldAccess = ((FabricWorldAccess) l.getWorld());
-            ChunkGenerator generatorWrapper = ((FabricChunkGenerator) fabricWorldAccess.getGenerator()).getHandle();
-            return delegate.generate((StructureWorldAccess) fabricWorldAccess.getHandle(), generatorWrapper, r, new BlockPos(l.getBlockX(), l.getBlockY(), l.getBlockZ()));
-        }
-    }
-
-    @Override
-    public MaterialSet getSpawnable() {
-        return MaterialSet.get(TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:grass_block"),
-                TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:podzol"),
-                TerraFabricPlugin.getInstance().getWorldHandle().createBlockData("minecraft:mycelium"));
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/block/state/FabricBlockState.java

@@ -1,73 +0,0 @@
-package com.dfsek.terra.fabric.world.block.state;
-
-import com.dfsek.terra.api.platform.block.Block;
-import com.dfsek.terra.api.platform.block.BlockData;
-import com.dfsek.terra.api.platform.block.state.BlockState;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.block.FabricBlock;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldHandle;
-import net.minecraft.block.entity.BlockEntity;
-import net.minecraft.block.entity.LootableContainerBlockEntity;
-import net.minecraft.block.entity.MobSpawnerBlockEntity;
-import net.minecraft.block.entity.SignBlockEntity;
-import net.minecraft.world.WorldAccess;
-
-public class FabricBlockState implements BlockState {
-    protected final BlockEntity blockEntity;
-    private final WorldAccess worldAccess;
-
-    public FabricBlockState(BlockEntity blockEntity, WorldAccess worldAccess) {
-        this.blockEntity = blockEntity;
-        this.worldAccess = worldAccess;
-    }
-
-    public static FabricBlockState newInstance(Block block) {
-        WorldAccess worldAccess = ((FabricWorldHandle) block.getLocation().getWorld()).getWorld();
-
-        BlockEntity entity = worldAccess.getBlockEntity(FabricAdapter.adapt(block.getLocation().toVector()));
-        if(entity instanceof SignBlockEntity) {
-            return new FabricSign((SignBlockEntity) entity, worldAccess);
-        } else if(entity instanceof MobSpawnerBlockEntity) {
-            return new FabricMobSpawner((MobSpawnerBlockEntity) entity, worldAccess);
-        } else if(entity instanceof LootableContainerBlockEntity) {
-            return new FabricContainer((LootableContainerBlockEntity) entity, worldAccess);
-        }
-        return null;
-    }
-
-    @Override
-    public BlockEntity getHandle() {
-        return blockEntity;
-    }
-
-    @Override
-    public Block getBlock() {
-        return new FabricBlock(blockEntity.getPos(), blockEntity.getWorld());
-    }
-
-    @Override
-    public int getX() {
-        return blockEntity.getPos().getX();
-    }
-
-    @Override
-    public int getY() {
-        return blockEntity.getPos().getY();
-    }
-
-    @Override
-    public int getZ() {
-        return blockEntity.getPos().getZ();
-    }
-
-    @Override
-    public BlockData getBlockData() {
-        return FabricAdapter.adapt(blockEntity.getCachedState());
-    }
-
-    @Override
-    public boolean update(boolean applyPhysics) {
-        worldAccess.getChunk(blockEntity.getPos()).setBlockEntity(blockEntity.getPos(), blockEntity);
-        return true;
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/block/state/FabricContainer.java

@@ -1,18 +0,0 @@
-package com.dfsek.terra.fabric.world.block.state;
-
-import com.dfsek.terra.api.platform.block.state.Container;
-import com.dfsek.terra.api.platform.inventory.Inventory;
-import com.dfsek.terra.fabric.inventory.FabricInventory;
-import net.minecraft.block.entity.LootableContainerBlockEntity;
-import net.minecraft.world.WorldAccess;
-
-public class FabricContainer extends FabricBlockState implements Container {
-    public FabricContainer(LootableContainerBlockEntity blockEntity, WorldAccess worldAccess) {
-        super(blockEntity, worldAccess);
-    }
-
-    @Override
-    public Inventory getInventory() {
-        return new FabricInventory(((LootableContainerBlockEntity) blockEntity));
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/entity/FabricCommandSender.java

@@ -1,23 +0,0 @@
-package com.dfsek.terra.fabric.world.entity;
-
-import com.dfsek.terra.api.platform.CommandSender;
-import net.minecraft.server.command.ServerCommandSource;
-import net.minecraft.text.LiteralText;
-
-public class FabricCommandSender implements CommandSender {
-    private final ServerCommandSource delegate;
-
-    public FabricCommandSender(ServerCommandSource delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public void sendMessage(String message) {
-        delegate.sendFeedback(new LiteralText(message), true);
-    }
-
-    @Override
-    public Object getHandle() {
-        return delegate;
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/entity/FabricEntity.java

@@ -1,43 +0,0 @@
-package com.dfsek.terra.fabric.world.entity;
-
-import com.dfsek.terra.api.math.vector.Location;
-import com.dfsek.terra.api.platform.entity.Entity;
-import com.dfsek.terra.api.platform.world.World;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldAccess;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldHandle;
-import net.minecraft.server.world.ServerWorld;
-
-public class FabricEntity implements Entity {
-    private final net.minecraft.entity.Entity delegate;
-
-    public FabricEntity(net.minecraft.entity.Entity delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public void sendMessage(String message) {
-
-    }
-
-    @Override
-    public Object getHandle() {
-        return null;
-    }
-
-    @Override
-    public Location getLocation() {
-        return new Location(new FabricWorldAccess(delegate.world), FabricAdapter.adapt(delegate.getBlockPos()));
-    }
-
-    @Override
-    public void setLocation(Location location) {
-        delegate.teleport(location.getX(), location.getY(), location.getZ());
-        delegate.moveToWorld((ServerWorld) ((FabricWorldHandle) location).getWorld());
-    }
-
-    @Override
-    public World getWorld() {
-        return new FabricWorldAccess(delegate.world);
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/entity/FabricPlayer.java

@@ -1,42 +0,0 @@
-package com.dfsek.terra.fabric.world.entity;
-
-import com.dfsek.terra.api.math.vector.Location;
-import com.dfsek.terra.api.platform.entity.Player;
-import com.dfsek.terra.api.platform.world.World;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.handles.world.FabricWorldAccess;
-import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.text.LiteralText;
-
-public class FabricPlayer implements Player {
-    private final PlayerEntity delegate;
-
-    public FabricPlayer(PlayerEntity delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public void sendMessage(String message) {
-        delegate.sendMessage(new LiteralText(message), false);
-    }
-
-    @Override
-    public Object getHandle() {
-        return delegate;
-    }
-
-    @Override
-    public Location getLocation() {
-        return FabricAdapter.adapt(delegate.getBlockPos()).toLocation(new FabricWorldAccess(delegate.world));
-    }
-
-    @Override
-    public World getWorld() {
-        return new FabricWorldAccess(delegate.world);
-    }
-
-    @Override
-    public void setLocation(Location location) {
-        delegate.teleport(location.getX(), location.getY(), location.getZ());
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/generator/FabricChunkGenerator.java

@@ -1,16 +0,0 @@
-package com.dfsek.terra.fabric.world.generator;
-
-import com.dfsek.terra.api.platform.world.generator.ChunkGenerator;
-
-public class FabricChunkGenerator implements ChunkGenerator {
-    private final net.minecraft.world.gen.chunk.ChunkGenerator delegate;
-
-    public FabricChunkGenerator(net.minecraft.world.gen.chunk.ChunkGenerator delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public net.minecraft.world.gen.chunk.ChunkGenerator getHandle() {
-        return delegate;
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/handles/world/FabricSeededWorldAccess.java

@@ -1,133 +0,0 @@
-package com.dfsek.terra.fabric.world.handles.world;
-
-import com.dfsek.terra.api.math.vector.Location;
-import com.dfsek.terra.api.platform.block.Block;
-import com.dfsek.terra.api.platform.entity.Entity;
-import com.dfsek.terra.api.platform.entity.EntityType;
-import com.dfsek.terra.api.platform.world.Chunk;
-import com.dfsek.terra.api.platform.world.World;
-import com.dfsek.terra.api.platform.world.generator.ChunkGenerator;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.block.FabricBlock;
-import com.dfsek.terra.fabric.world.entity.FabricEntity;
-import com.dfsek.terra.fabric.world.generator.FabricChunkGenerator;
-import net.minecraft.server.world.ServerWorld;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.ServerWorldAccess;
-import net.minecraft.world.WorldAccess;
-
-import java.io.File;
-import java.util.UUID;
-
-public class FabricSeededWorldAccess implements World, FabricWorldHandle {
-
-    private final Handle handle;
-
-    public FabricSeededWorldAccess(WorldAccess access, long seed, net.minecraft.world.gen.chunk.ChunkGenerator generator) {
-        this.handle = new Handle(access, seed, generator);
-    }
-
-    @Override
-    public long getSeed() {
-        return handle.getSeed();
-    }
-
-    @Override
-    public int getMaxHeight() {
-        return handle.getWorldAccess().getDimensionHeight();
-    }
-
-    @Override
-    public ChunkGenerator getGenerator() {
-        return new FabricChunkGenerator(handle.getGenerator());
-    }
-
-    @Override
-    public String getName() {
-        return handle.toString(); // TODO: implementation
-    }
-
-    @Override
-    public UUID getUID() {
-        return UUID.randomUUID(); // TODO: implementation
-    }
-
-    @Override
-    public boolean isChunkGenerated(int x, int z) {
-        return false;
-    }
-
-    @Override
-    public Chunk getChunkAt(int x, int z) {
-        return null;
-    }
-
-    @Override
-    public File getWorldFolder() {
-        return null;
-    }
-
-    @Override
-    public Block getBlockAt(int x, int y, int z) {
-        BlockPos pos = new BlockPos(x, y, z);
-        return new FabricBlock(pos, handle.worldAccess);
-    }
-
-    @Override
-    public Entity spawnEntity(Location location, EntityType entityType) {
-        net.minecraft.entity.Entity entity = FabricAdapter.adapt(entityType).create((ServerWorld) handle.worldAccess);
-        entity.setPos(location.getX(), location.getY(), location.getZ());
-        handle.worldAccess.spawnEntity(entity);
-        return new FabricEntity(entity);
-    }
-
-    @Override
-    public int getMinHeight() {
-        return 0;
-    }
-
-    @Override
-    public int hashCode() {
-        return ((ServerWorldAccess) handle.worldAccess).toServerWorld().hashCode();
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if(!(obj instanceof FabricSeededWorldAccess)) return false;
-        return ((ServerWorldAccess) ((FabricSeededWorldAccess) obj).handle.worldAccess).toServerWorld().equals(((ServerWorldAccess) handle.worldAccess).toServerWorld());
-    }
-
-    @Override
-    public Handle getHandle() {
-        return handle;
-    }
-
-    @Override
-    public WorldAccess getWorld() {
-        return handle.worldAccess;
-    }
-
-    public static class Handle {
-        private final WorldAccess worldAccess;
-        private final long seed;
-        private final net.minecraft.world.gen.chunk.ChunkGenerator generator;
-
-        public Handle(WorldAccess worldAccess, long seed, net.minecraft.world.gen.chunk.ChunkGenerator generator) {
-            this.worldAccess = worldAccess;
-            this.seed = seed;
-            this.generator = generator;
-        }
-
-        public net.minecraft.world.gen.chunk.ChunkGenerator getGenerator() {
-            return generator;
-        }
-
-        public long getSeed() {
-            return seed;
-        }
-
-        public WorldAccess getWorldAccess() {
-            return worldAccess;
-        }
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/handles/world/FabricWorldAccess.java

@@ -1,108 +0,0 @@
-package com.dfsek.terra.fabric.world.handles.world;
-
-import com.dfsek.terra.api.math.vector.Location;
-import com.dfsek.terra.api.platform.block.Block;
-import com.dfsek.terra.api.platform.entity.Entity;
-import com.dfsek.terra.api.platform.entity.EntityType;
-import com.dfsek.terra.api.platform.world.Chunk;
-import com.dfsek.terra.api.platform.world.World;
-import com.dfsek.terra.api.platform.world.generator.ChunkGenerator;
-import com.dfsek.terra.fabric.world.FabricAdapter;
-import com.dfsek.terra.fabric.world.block.FabricBlock;
-import com.dfsek.terra.fabric.world.entity.FabricEntity;
-import com.dfsek.terra.fabric.world.generator.FabricChunkGenerator;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.ServerWorldAccess;
-import net.minecraft.world.StructureWorldAccess;
-import net.minecraft.world.WorldAccess;
-
-import java.io.File;
-import java.util.UUID;
-
-public class FabricWorldAccess implements World, FabricWorldHandle {
-    private final WorldAccess delegate;
-
-    public FabricWorldAccess(WorldAccess delegate) {
-        this.delegate = delegate;
-    }
-
-    @Override
-    public long getSeed() {
-        return ((StructureWorldAccess) delegate).getSeed();
-    }
-
-    @Override
-    public int getMaxHeight() {
-        return delegate.getDimensionHeight();
-    }
-
-    @Override
-    public ChunkGenerator getGenerator() {
-        return new FabricChunkGenerator(((ServerWorldAccess) delegate).toServerWorld().getChunkManager().getChunkGenerator());
-    }
-
-    @Override
-    public String getName() {
-        return ((ServerWorldAccess) delegate).toServerWorld().worldProperties.getLevelName();
-    }
-
-    @Override
-    public UUID getUID() {
-        return null;
-    }
-
-    @Override
-    public boolean isChunkGenerated(int x, int z) {
-        return false;
-    }
-
-    @Override
-    public Chunk getChunkAt(int x, int z) {
-        return null;
-    }
-
-    @Override
-    public File getWorldFolder() {
-        return null;
-    }
-
-    @Override
-    public Block getBlockAt(int x, int y, int z) {
-        BlockPos pos = new BlockPos(x, y, z);
-        return new FabricBlock(pos, delegate);
-    }
-
-    @Override
-    public Entity spawnEntity(Location location, EntityType entityType) {
-        net.minecraft.entity.Entity entity = FabricAdapter.adapt(entityType).create(((ServerWorldAccess) delegate).toServerWorld());
-        entity.setPos(location.getX(), location.getY(), location.getZ());
-        delegate.spawnEntity(entity);
-        return new FabricEntity(entity);
-    }
-
-    @Override
-    public int getMinHeight() {
-        return 0;
-    }
-
-    @Override
-    public WorldAccess getHandle() {
-        return delegate;
-    }
-
-    @Override
-    public WorldAccess getWorld() {
-        return delegate;
-    }
-
-    @Override
-    public int hashCode() {
-        return ((ServerWorldAccess) delegate).toServerWorld().hashCode();
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if(!(obj instanceof FabricWorldAccess)) return false;
-        return ((ServerWorldAccess) ((FabricWorldAccess) obj).delegate).toServerWorld().equals(((ServerWorldAccess) delegate).toServerWorld());
-    }
-}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/world/handles/world/FabricWorldHandle.java

@@ -1,7 +0,0 @@
-package com.dfsek.terra.fabric.world.handles.world;
-
-import net.minecraft.world.WorldAccess;
-
-public interface FabricWorldHandle {
-    WorldAccess getWorld();
-}

platforms/fabric/src/main/resources/terra-refmap.json

@@ -1,16 +0,0 @@
-{
-  "mappings": {
-    "com/dfsek/terra/fabric/mixin/GeneratorTypeAccessor": {
-      "VALUES": "field_25052:Ljava/util/List;",
-      "translationKey": "field_25060:Lnet/minecraft/class_2561;"
-    }
-  },
-  "data": {
-    "named:intermediary": {
-      "com/dfsek/terra/fabric/mixin/GeneratorTypeAccessor": {
-        "VALUES": "field_25052:Ljava/util/List;",
-        "translationKey": "field_25060:Lnet/minecraft/class_2561;"
-      }
-    }
-  }
-}

platforms/fabric/src/main/resources/terra.accesswidener

@@ -1,19 +1,3 @@
 accessWidener v1 named
 
-extendable method net/minecraft/client/world/GeneratorType <init> (Ljava/lang/String;)V
-
-accessible field net/minecraft/server/world/ServerWorld worldProperties Lnet/minecraft/world/level/ServerWorldProperties;
-
-accessible method net/minecraft/world/MobSpawnerLogic getEntityId ()Lnet/minecraft/util/Identifier;
-
-accessible field net/minecraft/state/State PROPERTY_MAP_PRINTER Ljava/util/function/Function;
-
-
-accessible field net/minecraft/world/biome/BiomeEffects fogColor I
-accessible field net/minecraft/world/biome/BiomeEffects waterColor I
-accessible field net/minecraft/world/biome/BiomeEffects waterFogColor I
-accessible field net/minecraft/world/biome/BiomeEffects skyColor I
-
-accessible field net/minecraft/world/biome/BiomeEffects foliageColor Ljava/util/Optional;
-accessible field net/minecraft/world/biome/BiomeEffects grassColor Ljava/util/Optional;
-accessible field net/minecraft/world/biome/BiomeEffects grassColorModifier Lnet/minecraft/world/biome/BiomeEffects$GrassColorModifier;
+extendable method net/minecraft/client/world/GeneratorType <init> (Ljava/lang/String;)V

platforms/fabric/src/main/resources/terra.mixins.json

@@ -4,9 +4,36 @@
   "package": "com.dfsek.terra.fabric.mixin",
   "compatibilityLevel": "JAVA_8",
   "mixins": [
+    "GeneratorOptionsMixin",
+    "access.BiomeEffectsAccessor",
+    "access.MobSpawnerLogicAccessor",
+    "access.StateAccessor",
+    "implementations.BiomeMixin",
+    "implementations.ChunkGeneratorMixin",
+    "implementations.ConfiguredFeatureMixin",
+    "implementations.block.BlockEntityMixin",
+    "implementations.block.BlockMixin",
+    "implementations.block.state.LootableContainerBlockEntityMixin",
+    "implementations.block.state.MobSpawnerBlockEntityMixin",
+    "implementations.block.state.SignBlockEntityMixin",
+    "implementations.chunk.ChunkRegionMixin",
+    "implementations.chunk.WorldChunkMixin",
+    "implementations.chunk.data.ProtoChunkMixin",
+    "implementations.entity.EntityMixin",
+    "implementations.entity.EntityTypeMixin",
+    "implementations.entity.PlayerEntityMixin",
+    "implementations.entity.ServerCommandSourceMixin",
+    "implementations.inventory.LockableContainerBlockEntityMixin",
+    "implementations.inventory.item.ItemMixin",
+    "implementations.inventory.item.ItemStackMixin",
+    "implementations.inventory.meta.EnchantmentMixin",
+    "implementations.inventory.meta.ItemStackDamageableMixin",
+    "implementations.inventory.meta.ItemStackMetaMixin",
+    "implementations.world.ChunkRegionMixin",
+    "implementations.world.ServerWorldMixin"
   ],
   "client": [
-    "GeneratorTypeAccessor"
+    "access.GeneratorTypeAccessor"
   ],
   "server": [],
   "injectors": {

platforms/forge/build.gradle.kts

@@ -0,0 +1,136 @@
+import com.dfsek.terra.configureCommon
+import net.minecraftforge.gradle.common.util.RunConfig
+import net.minecraftforge.gradle.mcp.task.GenerateSRG
+import net.minecraftforge.gradle.userdev.UserDevExtension
+import net.minecraftforge.gradle.userdev.tasks.RenameJarInPlace
+
+buildscript {
+    repositories {
+        maven { url = uri("https://files.minecraftforge.net/maven") }
+        jcenter()
+        mavenCentral()
+        maven { url = uri("https://repo.spongepowered.org/repository/maven-public/") }
+    }
+    dependencies {
+        classpath(group = "net.minecraftforge.gradle", name = "ForgeGradle", version = "4.1.+")
+        classpath("org.spongepowered:mixingradle:0.7-SNAPSHOT")
+    }
+}
+apply(plugin = "net.minecraftforge.gradle")
+apply(plugin = "org.spongepowered.mixin")
+
+configure<org.spongepowered.asm.gradle.plugins.MixinExtension> {
+    add(sourceSets.main.get(), "terra-refmap.json")
+}
+
+plugins {
+    java
+    id("com.modrinth.minotaur").version("1.1.0")
+}
+
+configureCommon()
+
+group = "com.dfsek.terra.forge"
+
+repositories {
+    maven { url = uri("https://files.minecraftforge.net/maven") }
+    jcenter()
+    mavenCentral()
+    maven { url = uri("https://repo.spongepowered.org/repository/maven-public/") }
+}
+
+val forgeVersion = "36.1.13"
+val mcVersion = "1.16.5"
+dependencies {
+    "shadedApi"(project(":common"))
+    "minecraft"("net.minecraftforge:forge:$mcVersion-$forgeVersion")
+    "annotationProcessor"("org.spongepowered:mixin:0.8.2:processor")
+}
+
+if ("true" == System.getProperty("idea.sync.active")) {
+    afterEvaluate {
+        tasks.withType<JavaCompile>().all {
+            options.annotationProcessorPath = files()
+        }
+    }
+}
+
+afterEvaluate {
+    val reobf = extensions.getByName<NamedDomainObjectContainer<RenameJarInPlace>>("reobf")
+    reobf.maybeCreate("shadowJar").run {
+        group = "forge"
+        mappings = tasks.getByName<GenerateSRG>("createMcpToSrg").output
+    }
+}
+
+configure<UserDevExtension> {
+    mappings(mapOf(
+            "channel" to "official",
+            "version" to mcVersion
+    ))
+    runs {
+        val runConfig = Action<RunConfig> {
+            properties(mapOf(
+                    "forge.logging.markers" to "SCAN,REGISTRIES,REGISTRYDUMP",
+                    "forge.logging.console.level" to "debug"
+            ))
+            arg("-mixin.config=terra.mixins.json")
+            workingDirectory = project.file("run").canonicalPath
+            source(sourceSets["main"])
+        }
+        create("client", runConfig)
+        create("server", runConfig)
+    }
+}
+
+tasks.register<Jar>("deobfJar") {
+    from(sourceSets["main"].output)
+    archiveClassifier.set("dev")
+    group = "forge"
+}
+
+val deobfElements = configurations.register("deobfElements") {
+    isVisible = false
+    description = "De-obfuscated elements for libs"
+    isCanBeResolved = false
+    isCanBeConsumed = true
+    attributes {
+        attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage.JAVA_API))
+        attribute(Category.CATEGORY_ATTRIBUTE, project.objects.named(Category.LIBRARY))
+        attribute(Bundling.BUNDLING_ATTRIBUTE, project.objects.named(Bundling.EXTERNAL))
+        attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, project.objects.named(LibraryElements.JAR))
+        attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 8)
+    }
+    outgoing.artifact(tasks.named("deobfJar"))
+}
+
+val javaComponent = components["java"] as AdhocComponentWithVariants
+javaComponent.addVariantsFromConfiguration(deobfElements.get()) {
+    mapToMavenScope("runtime")
+}
+
+tasks.jar {
+    manifest {
+        attributes(mapOf(
+                "Specification-Title" to "terra",
+                "Specification-Vendor" to "Terra",
+                "Specification-Version" to "1.0",
+                "Implementation-Title" to "Terra",
+                "Implementation-Version" to project.version,
+                "Implementation-Vendor" to "terra",
+                "MixinConfigs" to "terra.mixins.json"
+        ))
+    }
+}
+
+tasks.register<com.modrinth.minotaur.TaskModrinthUpload>("publishModrinthForge") {
+    dependsOn("reobfShadowJar")
+    group = "forge"
+    token = System.getenv("MODRINTH_SECRET")
+    projectId = "FIlZB9L0"
+    versionNumber = "${project.version}-forge"
+    uploadFile = tasks.named<RenameJarInPlace>("reobfShadowJar").get().input.absoluteFile
+    releaseType = "alpha"
+    addGameVersion("1.16.5")
+    addLoader("forge")
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/TerraForgePlugin.java

@@ -0,0 +1,510 @@
+package com.dfsek.terra.forge;
+
+import com.dfsek.tectonic.loading.TypeRegistry;
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.addons.TerraAddon;
+import com.dfsek.terra.api.addons.annotations.Addon;
+import com.dfsek.terra.api.addons.annotations.Author;
+import com.dfsek.terra.api.addons.annotations.Version;
+import com.dfsek.terra.api.command.CommandManager;
+import com.dfsek.terra.api.command.TerraCommandManager;
+import com.dfsek.terra.api.command.exception.CommandException;
+import com.dfsek.terra.api.command.exception.MalformedCommandException;
+import com.dfsek.terra.api.event.EventListener;
+import com.dfsek.terra.api.event.EventManager;
+import com.dfsek.terra.api.event.TerraEventManager;
+import com.dfsek.terra.api.event.annotations.Global;
+import com.dfsek.terra.api.event.annotations.Priority;
+import com.dfsek.terra.api.event.events.config.ConfigPackPreLoadEvent;
+import com.dfsek.terra.api.platform.CommandSender;
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.handle.ItemHandle;
+import com.dfsek.terra.api.platform.handle.WorldHandle;
+import com.dfsek.terra.api.platform.world.Tree;
+import com.dfsek.terra.api.platform.world.World;
+import com.dfsek.terra.api.registry.CheckedRegistry;
+import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.transform.NotNullValidator;
+import com.dfsek.terra.api.transform.Transformer;
+import com.dfsek.terra.api.util.JarUtil;
+import com.dfsek.terra.api.util.logging.DebugLogger;
+import com.dfsek.terra.api.util.mutable.MutableInteger;
+import com.dfsek.terra.commands.CommandUtil;
+import com.dfsek.terra.config.GenericLoaders;
+import com.dfsek.terra.config.PluginConfig;
+import com.dfsek.terra.config.builder.BiomeBuilder;
+import com.dfsek.terra.config.lang.LangUtil;
+import com.dfsek.terra.config.lang.Language;
+import com.dfsek.terra.config.pack.ConfigPack;
+import com.dfsek.terra.config.templates.BiomeTemplate;
+import com.dfsek.terra.forge.inventory.ForgeItemHandle;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import com.dfsek.terra.forge.world.ForgeBiome;
+import com.dfsek.terra.forge.world.ForgeTree;
+import com.dfsek.terra.forge.world.ForgeWorldHandle;
+import com.dfsek.terra.forge.world.features.PopulatorFeature;
+import com.dfsek.terra.forge.world.generator.ForgeChunkGenerator;
+import com.dfsek.terra.forge.world.generator.ForgeChunkGeneratorWrapper;
+import com.dfsek.terra.forge.world.generator.config.TerraLevelType;
+import com.dfsek.terra.profiler.Profiler;
+import com.dfsek.terra.profiler.ProfilerImpl;
+import com.dfsek.terra.registry.exception.DuplicateEntryException;
+import com.dfsek.terra.registry.master.AddonRegistry;
+import com.dfsek.terra.registry.master.ConfigRegistry;
+import com.dfsek.terra.world.TerraWorld;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.ArgumentBuilder;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import net.minecraft.block.Blocks;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.widget.button.Button;
+import net.minecraft.command.CommandSource;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.text.StringTextComponent;
+import net.minecraft.world.biome.Biome;
+import net.minecraft.world.biome.BiomeAmbience;
+import net.minecraft.world.biome.BiomeGenerationSettings;
+import net.minecraft.world.gen.GenerationStage;
+import net.minecraft.world.gen.feature.ConfiguredFeature;
+import net.minecraft.world.gen.feature.Feature;
+import net.minecraft.world.gen.feature.Features;
+import net.minecraft.world.gen.feature.IFeatureConfig;
+import net.minecraft.world.gen.feature.NoFeatureConfig;
+import net.minecraft.world.gen.placement.DecoratedPlacement;
+import net.minecraft.world.gen.placement.NoPlacementConfig;
+import net.minecraft.world.gen.surfacebuilders.SurfaceBuilder;
+import net.minecraft.world.gen.surfacebuilders.SurfaceBuilderConfig;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.client.ForgeWorldTypeScreens;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.common.world.ForgeWorldType;
+import net.minecraftforge.event.RegisterCommandsEvent;
+import net.minecraftforge.event.RegistryEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
+import net.minecraftforge.registries.ForgeRegistries;
+import org.apache.commons.io.FileUtils;
+import org.apache.logging.log4j.LogManager;
+import org.objectweb.asm.Type;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URISyntaxException;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.jar.JarFile;
+import java.util.zip.ZipFile;
+
+import static com.mojang.brigadier.builder.LiteralArgumentBuilder.literal;
+import static com.mojang.brigadier.builder.RequiredArgumentBuilder.argument;
+
+@Mod("terra")
+@Mod.EventBusSubscriber(modid = "terra", bus = Mod.EventBusSubscriber.Bus.MOD)
+public class TerraForgePlugin implements TerraPlugin {
+    public static final PopulatorFeature POPULATOR_FEATURE = (PopulatorFeature) new PopulatorFeature(NoFeatureConfig.CODEC).setRegistryName("terra", "terra");
+    public static final ConfiguredFeature<?, ?> POPULATOR_CONFIGURED_FEATURE = POPULATOR_FEATURE.configured(IFeatureConfig.NONE).decorated(DecoratedPlacement.NOPE.configured(NoPlacementConfig.INSTANCE));
+
+    private static TerraForgePlugin INSTANCE;
+    private final Map<Long, TerraWorld> worldMap = new HashMap<>();
+    private final EventManager eventManager = new TerraEventManager(this);
+    private final GenericLoaders genericLoaders = new GenericLoaders(this);
+    private final Profiler profiler = new ProfilerImpl();
+
+    private final CommandManager manager = new TerraCommandManager(this);
+
+    private final com.dfsek.terra.api.util.logging.Logger logger = new com.dfsek.terra.api.util.logging.Logger() {
+        private final org.apache.logging.log4j.Logger logger = LogManager.getLogger();
+
+        @Override
+        public void info(String message) {
+            logger.info(message);
+        }
+
+        @Override
+        public void warning(String message) {
+            logger.warn(message);
+        }
+
+        @Override
+        public void severe(String message) {
+            logger.error(message);
+        }
+    };
+    private final DebugLogger debugLogger = new DebugLogger(logger);
+    private final ItemHandle itemHandle = new ForgeItemHandle();
+    private final WorldHandle worldHandle = new ForgeWorldHandle();
+    private final ConfigRegistry registry = new ConfigRegistry();
+    private final CheckedRegistry<ConfigPack> checkedRegistry = new CheckedRegistry<>(registry);
+    private final AddonRegistry addonRegistry = new AddonRegistry(new ForgeAddon(this), this);
+    private final LockedRegistry<TerraAddon> addonLockedRegistry = new LockedRegistry<>(addonRegistry);
+    private final PluginConfig config = new PluginConfig();
+    private final Transformer<String, Biome> biomeFixer = new Transformer.Builder<String, Biome>()
+            .addTransform(id -> ForgeRegistries.BIOMES.getValue(ResourceLocation.tryParse(id)), new NotNullValidator<>())
+            .addTransform(id -> ForgeRegistries.BIOMES.getValue(ResourceLocation.tryParse("minecraft:" + id.toLowerCase())), new NotNullValidator<>()).build();
+    private File dataFolder;
+
+    public TerraForgePlugin() {
+        if(INSTANCE != null) throw new IllegalStateException("Only one TerraPlugin instance may exist.");
+        INSTANCE = this;
+        MinecraftForge.EVENT_BUS.register(ClientEvents.class);
+        MinecraftForge.EVENT_BUS.register(getClass());
+        MinecraftForge.EVENT_BUS.register(ForgeEvents.class);
+    }
+
+    public static TerraForgePlugin getInstance() {
+        return INSTANCE;
+    }
+
+    public static String createBiomeID(ConfigPack pack, String biomeID) {
+        return pack.getTemplate().getID().toLowerCase() + "/" + biomeID.toLowerCase(Locale.ROOT);
+    }
+
+    private static RequiredArgumentBuilder<CommandSource, String> assemble(RequiredArgumentBuilder<CommandSource, String> in, CommandManager manager) {
+        return in.suggests((context, builder) -> {
+            List<String> args = parseCommand(context.getInput());
+            CommandSender sender = ForgeAdapter.adapt(context.getSource());
+            try {
+                manager.tabComplete(args.remove(0), sender, args).forEach(builder::suggest);
+            } catch(CommandException e) {
+                sender.sendMessage(e.getMessage());
+            }
+            return builder.buildFuture();
+        }).executes(context -> {
+            List<String> args = parseCommand(context.getInput());
+            try {
+                manager.execute(args.remove(0), ForgeAdapter.adapt(context.getSource()), args);
+            } catch(CommandException e) {
+                context.getSource().sendFailure(new StringTextComponent(e.getMessage()));
+            }
+            return 1;
+        });
+    }
+
+    private static List<String> parseCommand(String command) {
+        if(command.startsWith("/terra ")) command = command.substring("/terra ".length());
+        else if(command.startsWith("/te ")) command = command.substring("/te ".length());
+        List<String> c = new ArrayList<>(Arrays.asList(command.split(" ")));
+        if(command.endsWith(" ")) c.add("");
+        return c;
+    }
+
+    @SubscribeEvent
+    public static void register(RegistryEvent.Register<Biome> event) {
+        INSTANCE.setup(); // Setup now because we need the biomes, and this event happens after blocks n stuff
+        INSTANCE.getConfigRegistry().forEach(pack -> pack.getBiomeRegistry().forEach((id, biome) -> event.getRegistry().register(INSTANCE.createBiome(biome)))); // Register all Terra biomes.
+    }
+
+    @SubscribeEvent
+    public static void registerLevels(RegistryEvent.Register<ForgeWorldType> event) {
+        INSTANCE.logger().info("Registering level types...");
+        event.getRegistry().register(TerraLevelType.FORGE_WORLD_TYPE);
+    }
+
+    @SubscribeEvent
+    public static void registerPop(RegistryEvent.Register<Feature<?>> event) {
+        event.getRegistry().register(POPULATOR_FEATURE);
+    }
+
+    public Biome createBiome(BiomeBuilder biome) {
+        BiomeTemplate template = biome.getTemplate();
+        Map<String, Integer> colors = template.getColors();
+
+        Biome vanilla = ((ForgeBiome) new ArrayList<>(biome.getVanillaBiomes().getContents()).get(0)).getHandle();
+
+        BiomeGenerationSettings.Builder generationSettings = new BiomeGenerationSettings.Builder();
+        generationSettings.surfaceBuilder(SurfaceBuilder.DEFAULT.configured(new SurfaceBuilderConfig(Blocks.GRASS_BLOCK.defaultBlockState(), Blocks.DIRT.defaultBlockState(), Blocks.GRAVEL.defaultBlockState()))); // It needs a surfacebuilder, even though we dont use it.
+        generationSettings.addFeature(GenerationStage.Decoration.VEGETAL_DECORATION, POPULATOR_CONFIGURED_FEATURE);
+
+        BiomeAmbience vanillaEffects = vanilla.getSpecialEffects();
+        BiomeAmbience.Builder effects = new BiomeAmbience.Builder()
+                .waterColor(colors.getOrDefault("water", vanillaEffects.getWaterColor()))
+                .waterFogColor(colors.getOrDefault("water-fog", vanillaEffects.getWaterFogColor()))
+                .fogColor(colors.getOrDefault("fog", vanillaEffects.getFogColor()))
+                .skyColor(colors.getOrDefault("sky", vanillaEffects.getSkyColor()))
+                .grassColorModifier(vanillaEffects.getGrassColorModifier());
+
+        if(colors.containsKey("grass")) {
+            effects.grassColorOverride(colors.get("grass"));
+        } else {
+            vanillaEffects.getGrassColorOverride().ifPresent(effects::grassColorOverride);
+        }
+        vanillaEffects.getFoliageColorOverride().ifPresent(effects::foliageColorOverride);
+        if(colors.containsKey("foliage")) {
+            effects.foliageColorOverride(colors.get("foliage"));
+        } else {
+            vanillaEffects.getFoliageColorOverride().ifPresent(effects::foliageColorOverride);
+        }
+
+        return new Biome.Builder()
+                .precipitation(vanilla.getPrecipitation())
+                .biomeCategory(vanilla.getBiomeCategory())
+                .depth(vanilla.getDepth())
+                .scale(vanilla.getScale())
+                .temperature(vanilla.getBaseTemperature())
+                .downfall(vanilla.getDownfall())
+                .specialEffects(effects.build())
+                .mobSpawnSettings(vanilla.getMobSettings())
+                .generationSettings(generationSettings.build())
+                .build().setRegistryName("terra", createBiomeID(template.getPack(), template.getID()));
+    }
+
+    public void setup() {
+        this.dataFolder = Paths.get("config", "Terra").toFile();
+        saveDefaultConfig();
+        config.load(this);
+        LangUtil.load(config.getLanguage(), this);
+        logger.info("Initializing Terra...");
+
+        if(!addonRegistry.loadAll()) {
+            throw new IllegalStateException("Failed to load addons. Please correct addon installations to continue.");
+        }
+        logger.info("Loaded addons.");
+
+        registry.loadAll(this);
+
+        logger.info("Loaded packs.");
+
+
+        try {
+            CommandUtil.registerAll(manager);
+        } catch(MalformedCommandException e) {
+            e.printStackTrace(); // TODO do something here even though this should literally never happen
+        }
+    }
+
+    @Override
+    public WorldHandle getWorldHandle() {
+        return worldHandle;
+    }
+
+    @Override
+    public TerraWorld getWorld(World world) {
+        return worldMap.computeIfAbsent(world.getSeed(), w -> {
+            logger.info("Loading world " + w);
+            return new TerraWorld(world, ((ForgeChunkGeneratorWrapper) ((ForgeChunkGenerator) world.getGenerator()).getHandle()).getPack(), this);
+        });
+    }
+
+    @Override
+    public JarFile getModJar() throws URISyntaxException, IOException {
+        File modsDir = new File("./mods");
+
+        if(!modsDir.exists()) return JarUtil.getJarFile();
+
+        for(File file : Objects.requireNonNull(modsDir.listFiles((dir, name) -> name.endsWith(".jar")))) {
+            try(ZipFile zipFile = new ZipFile(file)) {
+                if(zipFile.getEntry(Type.getInternalName(TerraPlugin.class) + ".class") != null) {
+                    return new JarFile(file);
+                }
+            }
+        }
+        return JarUtil.getJarFile();
+    }
+
+    public TerraWorld getWorld(long seed) {
+        TerraWorld world = worldMap.get(seed);
+        if(world == null) throw new IllegalArgumentException("No world exists with seed " + seed);
+        return world;
+    }
+
+    @Override
+    public com.dfsek.terra.api.util.logging.Logger logger() {
+        return logger;
+    }
+
+    @Override
+    public PluginConfig getTerraConfig() {
+        return config;
+    }
+
+    @Override
+    public File getDataFolder() {
+        return dataFolder;
+    }
+
+    @Override
+    public boolean isDebug() {
+        return true;
+    }
+
+    @Override
+    public Language getLanguage() {
+        return LangUtil.getLanguage();
+    }
+
+    @Override
+    public CheckedRegistry<ConfigPack> getConfigRegistry() {
+        return checkedRegistry;
+    }
+
+    @Override
+    public LockedRegistry<TerraAddon> getAddons() {
+        return addonLockedRegistry;
+    }
+
+    @Override
+    public boolean reload() {
+        config.load(this);
+        LangUtil.load(config.getLanguage(), this); // Load language.
+        boolean succeed = registry.loadAll(this);
+        Map<Long, TerraWorld> newMap = new HashMap<>();
+        worldMap.forEach((seed, tw) -> {
+            tw.getConfig().getSamplerCache().clear();
+            String packID = tw.getConfig().getTemplate().getID();
+            newMap.put(seed, new TerraWorld(tw.getWorld(), registry.get(packID), this));
+        });
+        worldMap.clear();
+        worldMap.putAll(newMap);
+        return succeed;
+    }
+
+    @Override
+    public ItemHandle getItemHandle() {
+        return itemHandle;
+    }
+
+    @Override
+    public void saveDefaultConfig() {
+        try(InputStream stream = getClass().getResourceAsStream("/config.yml")) {
+            File configFile = new File(getDataFolder(), "config.yml");
+            if(!configFile.exists()) FileUtils.copyInputStreamToFile(stream, configFile);
+        } catch(IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public String platformName() {
+        return "Forge";
+    }
+
+    @Override
+    public DebugLogger getDebugLogger() {
+        return debugLogger;
+    }
+
+    @Override
+    public void register(TypeRegistry registry) {
+        genericLoaders.register(registry);
+        registry
+                .registerLoader(BlockData.class, (t, o, l) -> worldHandle.createBlockData((String) o))
+                .registerLoader(com.dfsek.terra.api.platform.world.Biome.class, (t, o, l) -> new ForgeBiome(biomeFixer.translate((String) o)));
+    }
+
+    @Override
+    public EventManager getEventManager() {
+        return eventManager;
+    }
+
+    @Override
+    public Profiler getProfiler() {
+        return profiler;
+    }
+
+    @Mod.EventBusSubscriber(modid = "terra", bus = Mod.EventBusSubscriber.Bus.FORGE)
+    public static final class ForgeEvents {
+        @SuppressWarnings({"unchecked", "rawtypes"})
+        @SubscribeEvent
+        public static void registerCommands(RegisterCommandsEvent event) {
+            int max = INSTANCE.manager.getMaxArgumentDepth();
+            RequiredArgumentBuilder<CommandSource, String> arg = argument("arg" + (max - 1), StringArgumentType.word());
+            for(int i = 0; i < max; i++) {
+                RequiredArgumentBuilder<CommandSource, String> next = argument("arg" + (max - i - 1), StringArgumentType.word());
+
+                arg = next.then(assemble(arg, INSTANCE.manager));
+            }
+
+            event.getDispatcher().register(literal("terra").executes(context -> 1).then((ArgumentBuilder) assemble(arg, INSTANCE.manager)));
+            event.getDispatcher().register(literal("te").executes(context -> 1).then((ArgumentBuilder) assemble(arg, INSTANCE.manager)));
+        }
+    }
+
+    @Addon("Terra-Forge")
+    @Author("Terra")
+    @Version("1.0.0")
+    private static final class ForgeAddon extends TerraAddon implements EventListener {
+
+        private final TerraPlugin main;
+
+        private ForgeAddon(TerraPlugin main) {
+            this.main = main;
+        }
+
+        @Override
+        public void initialize() {
+            main.getEventManager().registerListener(this, this);
+        }
+
+        @Priority(Priority.LOWEST)
+        @Global
+        public void injectTrees(ConfigPackPreLoadEvent event) {
+            CheckedRegistry<Tree> treeRegistry = event.getPack().getTreeRegistry();
+            injectTree(treeRegistry, "BROWN_MUSHROOM", Features.HUGE_BROWN_MUSHROOM);
+            injectTree(treeRegistry, "RED_MUSHROOM", Features.HUGE_RED_MUSHROOM);
+            injectTree(treeRegistry, "JUNGLE", Features.MEGA_JUNGLE_TREE);
+            injectTree(treeRegistry, "JUNGLE_COCOA", Features.JUNGLE_TREE);
+            injectTree(treeRegistry, "LARGE_OAK", Features.FANCY_OAK);
+            injectTree(treeRegistry, "LARGE_SPRUCE", Features.PINE);
+            injectTree(treeRegistry, "SMALL_JUNGLE", Features.JUNGLE_TREE);
+            injectTree(treeRegistry, "SWAMP_OAK", Features.SWAMP_TREE);
+            injectTree(treeRegistry, "TALL_BIRCH", Features.BIRCH_TALL);
+            injectTree(treeRegistry, "ACACIA", Features.ACACIA);
+            injectTree(treeRegistry, "BIRCH", Features.BIRCH);
+            injectTree(treeRegistry, "DARK_OAK", Features.DARK_OAK);
+            injectTree(treeRegistry, "OAK", Features.OAK);
+            injectTree(treeRegistry, "CHORUS_PLANT", Features.CHORUS_PLANT);
+            injectTree(treeRegistry, "SPRUCE", Features.SPRUCE);
+            injectTree(treeRegistry, "JUNGLE_BUSH", Features.JUNGLE_BUSH);
+            injectTree(treeRegistry, "MEGA_SPRUCE", Features.MEGA_SPRUCE);
+            injectTree(treeRegistry, "CRIMSON_FUNGUS", Features.CRIMSON_FUNGI);
+            injectTree(treeRegistry, "WARPED_FUNGUS", Features.WARPED_FUNGI);
+        }
+
+
+        private void injectTree(CheckedRegistry<Tree> registry, String id, ConfiguredFeature<?, ?> tree) {
+            try {
+                registry.add(id, new ForgeTree(tree, id, TerraForgePlugin.getInstance()));
+            } catch(DuplicateEntryException ignore) {
+            }
+        }
+    }
+
+    @Mod.EventBusSubscriber(value = Dist.CLIENT, bus = Mod.EventBusSubscriber.Bus.MOD)
+    public static final class ClientEvents {
+        @SubscribeEvent
+        public static void register(FMLClientSetupEvent event) {
+            INSTANCE.logger.info("Client setup...");
+
+            ForgeWorldType world = TerraLevelType.FORGE_WORLD_TYPE;
+            ForgeWorldTypeScreens.registerFactory(world, (returnTo, dimensionGeneratorSettings) -> new Screen(world.getDisplayName()) {
+                private final MutableInteger num = new MutableInteger(0);
+                private final List<ConfigPack> packs = new ArrayList<>();
+                private final Button toggle = new Button(0, 25, 120, 20, new StringTextComponent(""), button -> {
+                    num.increment();
+                    if(num.get() >= packs.size()) num.set(0);
+                    button.setMessage(new StringTextComponent("Pack: " + packs.get(num.get()).getTemplate().getID()));
+                });
+
+                @Override
+                protected void init() {
+                    packs.clear();
+                    INSTANCE.registry.forEach((Consumer<ConfigPack>) packs::add);
+                    addButton(new Button(0, 0, 120, 20, new StringTextComponent("Close"), btn -> Minecraft.getInstance().setScreen(returnTo)));
+                    toggle.setMessage(new StringTextComponent("Pack: " + packs.get(num.get()).getTemplate().getID()));
+                    addButton(toggle);
+                }
+            });
+        }
+    }
+
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/ForgeEnchantment.java

@@ -1,16 +1,17 @@
-package com.dfsek.terra.fabric.inventory;
+package com.dfsek.terra.forge.inventory;
 
 import com.dfsek.terra.api.platform.inventory.ItemStack;
 import com.dfsek.terra.api.platform.inventory.item.Enchantment;
-import com.dfsek.terra.fabric.world.FabricAdapter;
+import com.dfsek.terra.forge.world.ForgeAdapter;
 import net.minecraft.util.registry.Registry;
+import net.minecraftforge.registries.ForgeRegistries;
 
 import java.util.Objects;
 
-public class FabricEnchantment implements Enchantment {
+public class ForgeEnchantment implements Enchantment {
     private final net.minecraft.enchantment.Enchantment enchantment;
 
-    public FabricEnchantment(net.minecraft.enchantment.Enchantment enchantment) {
+    public ForgeEnchantment(net.minecraft.enchantment.Enchantment enchantment) {
         this.enchantment = enchantment;
     }
 
@@ -21,17 +22,17 @@ public class FabricEnchantment implements Enchantment {
 
     @Override
     public boolean canEnchantItem(ItemStack itemStack) {
-        return enchantment.isAcceptableItem(FabricAdapter.adapt(itemStack));
+        return enchantment.canEnchant(ForgeAdapter.adapt(itemStack));
     }
 
     @Override
     public String getID() {
-        return Objects.requireNonNull(Registry.ENCHANTMENT.getId(enchantment)).toString();
+        return Objects.requireNonNull(ForgeRegistries.ENCHANTMENTS.getKey(enchantment)).toString();
     }
 
     @Override
     public boolean conflictsWith(Enchantment other) {
-        return !enchantment.canCombine(FabricAdapter.adapt(other));
+        return !enchantment.isCompatibleWith(ForgeAdapter.adapt(other));
     }
 
     @Override

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/ForgeInventory.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.forge.inventory;
+
+import com.dfsek.terra.api.platform.inventory.Inventory;
+import com.dfsek.terra.api.platform.inventory.ItemStack;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.item.Items;
+
+public class ForgeInventory implements Inventory {
+    private final net.minecraft.inventory.IInventory delegate;
+
+    public ForgeInventory(IInventory delegate) {
+        this.delegate = delegate;
+    }
+
+    @Override
+    public net.minecraft.inventory.IInventory getHandle() {
+        return delegate;
+    }
+
+    @Override
+    public int getSize() {
+        return delegate.getContainerSize();
+    }
+
+    @Override
+    public ItemStack getItem(int slot) {
+        net.minecraft.item.ItemStack itemStack = delegate.getItem(slot);
+        return itemStack.getItem() == Items.AIR ? null : ForgeAdapter.adapt(itemStack);
+    }
+
+    @Override
+    public void setItem(int slot, ItemStack newStack) {
+        delegate.setItem(slot, ForgeAdapter.adapt(newStack));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/ForgeItem.java

@@ -1,12 +1,12 @@
-package com.dfsek.terra.fabric.inventory;
+package com.dfsek.terra.forge.inventory;
 
 import com.dfsek.terra.api.platform.inventory.Item;
 import com.dfsek.terra.api.platform.inventory.ItemStack;
 
-public class FabricItem implements Item {
+public class ForgeItem implements Item {
     private final net.minecraft.item.Item delegate;
 
-    public FabricItem(net.minecraft.item.Item delegate) {
+    public ForgeItem(net.minecraft.item.Item delegate) {
         this.delegate = delegate;
     }
 
@@ -17,7 +17,7 @@ public class FabricItem implements Item {
 
     @Override
     public ItemStack newItemStack(int amount) {
-        return new FabricItemStack(new net.minecraft.item.ItemStack(delegate, amount));
+        return new ForgeItemStack(new net.minecraft.item.ItemStack(delegate, amount));
     }
 
     @Override

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/ForgeItemHandle.java

@@ -0,0 +1,37 @@
+package com.dfsek.terra.forge.inventory;
+
+import com.dfsek.terra.api.platform.handle.ItemHandle;
+import com.dfsek.terra.api.platform.inventory.Item;
+import com.dfsek.terra.api.platform.inventory.item.Enchantment;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import com.mojang.brigadier.StringReader;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.minecraft.command.arguments.ItemArgument;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.registry.Registry;
+import net.minecraftforge.registries.ForgeRegistries;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ForgeItemHandle implements ItemHandle {
+
+    @Override
+    public Item createItem(String data) {
+        try {
+            return ForgeAdapter.adapt(new ItemArgument().parse(new StringReader(data)).getItem());
+        } catch(CommandSyntaxException e) {
+            throw new IllegalArgumentException("Invalid item data \"" + data + "\"", e);
+        }
+    }
+
+    @Override
+    public Enchantment getEnchantment(String id) {
+        return ForgeAdapter.adapt(ForgeRegistries.ENCHANTMENTS.getValue(ResourceLocation.tryParse(id)));
+    }
+
+    @Override
+    public Set<Enchantment> getEnchantments() {
+        return ForgeRegistries.ENCHANTMENTS.getEntries().stream().map(entry -> ForgeAdapter.adapt(entry.getValue())).collect(Collectors.toSet());
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/ForgeItemStack.java

@@ -1,15 +1,15 @@
-package com.dfsek.terra.fabric.inventory;
+package com.dfsek.terra.forge.inventory;
 
 import com.dfsek.terra.api.platform.inventory.Item;
 import com.dfsek.terra.api.platform.inventory.ItemStack;
 import com.dfsek.terra.api.platform.inventory.item.ItemMeta;
-import com.dfsek.terra.fabric.inventory.meta.FabricDamageable;
-import com.dfsek.terra.fabric.inventory.meta.FabricItemMeta;
+import com.dfsek.terra.forge.inventory.meta.ForgeDamageable;
+import com.dfsek.terra.forge.inventory.meta.ForgeItemMeta;
 
-public class FabricItemStack implements ItemStack {
+public class ForgeItemStack implements ItemStack {
     private net.minecraft.item.ItemStack delegate;
 
-    public FabricItemStack(net.minecraft.item.ItemStack delegate) {
+    public ForgeItemStack(net.minecraft.item.ItemStack delegate) {
         this.delegate = delegate;
     }
 
@@ -25,18 +25,18 @@ public class FabricItemStack implements ItemStack {
 
     @Override
     public Item getType() {
-        return new FabricItem(delegate.getItem());
+        return new ForgeItem(delegate.getItem());
     }
 
     @Override
     public ItemMeta getItemMeta() {
-        if(delegate.isDamageable()) return new FabricDamageable(delegate.copy());
-        return new FabricItemMeta(delegate.copy());
+        if(delegate.isDamageableItem()) return new ForgeDamageable(delegate.copy());
+        return new ForgeItemMeta(delegate.copy());
     }
 
     @Override
     public void setItemMeta(ItemMeta meta) {
-        this.delegate = ((FabricItemMeta) meta).getHandle();
+        this.delegate = ((ForgeItemMeta) meta).getHandle();
     }
 
     @Override

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/meta/ForgeDamageable.java

@@ -1,25 +1,25 @@
-package com.dfsek.terra.fabric.inventory.meta;
+package com.dfsek.terra.forge.inventory.meta;
 
 import com.dfsek.terra.api.platform.inventory.item.Damageable;
 import net.minecraft.item.ItemStack;
 
-public class FabricDamageable extends FabricItemMeta implements Damageable {
-    public FabricDamageable(ItemStack delegate) {
+public class ForgeDamageable extends ForgeItemMeta implements Damageable {
+    public ForgeDamageable(ItemStack delegate) {
         super(delegate);
     }
 
     @Override
     public int getDamage() {
-        return delegate.getDamage();
+        return delegate.getDamageValue();
     }
 
     @Override
     public void setDamage(int damage) {
-        delegate.setDamage(damage);
+        delegate.setDamageValue(damage);
     }
 
     @Override
     public boolean hasDamage() {
-        return delegate.isDamageable();
+        return delegate.isDamaged();
     }
 }

platforms/forge/src/main/java/com/dfsek/terra/forge/inventory/meta/ForgeItemMeta.java

@@ -1,20 +1,21 @@
-package com.dfsek.terra.fabric.inventory.meta;
+package com.dfsek.terra.forge.inventory.meta;
 
 import com.dfsek.terra.api.platform.inventory.item.Enchantment;
 import com.dfsek.terra.api.platform.inventory.item.ItemMeta;
-import com.dfsek.terra.fabric.world.FabricAdapter;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import net.minecraft.command.arguments.NBTCompoundTagArgument;
 import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.util.registry.Registry;
 
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
-public class FabricItemMeta implements ItemMeta {
+public class ForgeItemMeta implements ItemMeta {
     protected final ItemStack delegate;
 
-    public FabricItemMeta(ItemStack delegate) {
+    public ForgeItemMeta(ItemStack delegate) {
         this.delegate = delegate;
     }
 
@@ -25,18 +26,18 @@ public class FabricItemMeta implements ItemMeta {
 
     @Override
     public Map<Enchantment, Integer> getEnchantments() {
-        if(!delegate.hasEnchantments()) return Collections.emptyMap();
+        if(!delegate.isEnchanted()) return Collections.emptyMap();
         Map<Enchantment, Integer> map = new HashMap<>();
 
-        delegate.getEnchantments().forEach(enchantment -> {
-            CompoundTag eTag = (CompoundTag) enchantment;
-            map.put(FabricAdapter.adapt(Registry.ENCHANTMENT.get(eTag.getInt("id"))), eTag.getInt("lvl"));
+        delegate.getEnchantmentTags().forEach(enchantment -> {
+            CompoundNBT eTag = (CompoundNBT) enchantment;
+            map.put(ForgeAdapter.adapt(Registry.ENCHANTMENT.byId(eTag.getInt("id"))), eTag.getInt("lvl"));
         });
         return map;
     }
 
     @Override
     public void addEnchantment(Enchantment enchantment, int level) {
-        delegate.addEnchantment(FabricAdapter.adapt(enchantment), level);
+        delegate.enchant(ForgeAdapter.adapt(enchantment), level);
     }
 }

platforms/forge/src/main/java/com/dfsek/terra/forge/world/ForgeAdapter.java

@@ -0,0 +1,128 @@
+package com.dfsek.terra.forge.world;
+
+import com.dfsek.terra.api.math.vector.Vector3;
+import com.dfsek.terra.api.platform.CommandSender;
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.BlockType;
+import com.dfsek.terra.api.platform.entity.EntityType;
+import com.dfsek.terra.api.platform.inventory.item.Enchantment;
+import com.dfsek.terra.forge.inventory.ForgeEnchantment;
+import com.dfsek.terra.forge.inventory.ForgeItem;
+import com.dfsek.terra.forge.inventory.ForgeItemStack;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import com.dfsek.terra.forge.world.block.ForgeBlockType;
+import com.dfsek.terra.forge.world.block.data.ForgeDirectional;
+import com.dfsek.terra.forge.world.block.data.ForgeMultipleFacing;
+import com.dfsek.terra.forge.world.block.data.ForgeOrientable;
+import com.dfsek.terra.forge.world.block.data.ForgeRotatable;
+import com.dfsek.terra.forge.world.block.data.ForgeSlab;
+import com.dfsek.terra.forge.world.block.data.ForgeStairs;
+import com.dfsek.terra.forge.world.block.data.ForgeWaterlogged;
+import com.dfsek.terra.forge.world.entity.ForgeCommandSender;
+import com.dfsek.terra.forge.world.entity.ForgeEntityType;
+import com.dfsek.terra.forge.world.entity.ForgePlayer;
+import com.dfsek.terra.forge.world.handles.world.ForgeWorldHandle;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.command.CommandSource;
+import net.minecraft.command.ICommandSource;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.state.properties.BlockStateProperties;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.IWorld;
+
+import java.util.Arrays;
+
+public final class ForgeAdapter {
+    public static BlockPos adapt(Vector3 v) {
+        return new BlockPos(v.getBlockX(), v.getBlockY(), v.getBlockZ());
+    }
+
+    public static Vector3 adapt(BlockPos pos) {
+        return new Vector3(pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    public static ForgeBlockData adapt(BlockState state) {
+        if(state.hasProperty(BlockStateProperties.STAIRS_SHAPE)) return new ForgeStairs(state);
+
+        if(state.hasProperty(BlockStateProperties.SLAB_TYPE)) return new ForgeSlab(state);
+
+        if(state.hasProperty(BlockStateProperties.AXIS)) return new ForgeOrientable(state, BlockStateProperties.AXIS);
+        if(state.hasProperty(BlockStateProperties.HORIZONTAL_AXIS)) return new ForgeOrientable(state, BlockStateProperties.HORIZONTAL_AXIS);
+
+        if(state.hasProperty(BlockStateProperties.ROTATION_16)) return new ForgeRotatable(state);
+
+        if(state.hasProperty(BlockStateProperties.FACING)) return new ForgeDirectional(state, BlockStateProperties.FACING);
+        if(state.hasProperty(BlockStateProperties.FACING_HOPPER)) return new ForgeDirectional(state, BlockStateProperties.FACING_HOPPER);
+        if(state.hasProperty(BlockStateProperties.HORIZONTAL_FACING)) return new ForgeDirectional(state, BlockStateProperties.HORIZONTAL_FACING);
+
+        if(state.getProperties().containsAll(Arrays.asList(BlockStateProperties.NORTH, BlockStateProperties.SOUTH, BlockStateProperties.EAST, BlockStateProperties.WEST)))
+            return new ForgeMultipleFacing(state);
+        if(state.hasProperty(BlockStateProperties.WATERLOGGED)) return new ForgeWaterlogged(state);
+        return new ForgeBlockData(state);
+    }
+
+    public static CommandSender adapt(CommandSource serverCommandSource) {
+        if(serverCommandSource.getEntity() instanceof PlayerEntity) return new ForgePlayer((PlayerEntity) serverCommandSource.getEntity());
+        return new ForgeCommandSender(serverCommandSource);
+    }
+
+    public static Direction adapt(BlockFace face) {
+        switch(face) {
+            case NORTH:
+                return Direction.NORTH;
+            case WEST:
+                return Direction.WEST;
+            case SOUTH:
+                return Direction.SOUTH;
+            case EAST:
+                return Direction.EAST;
+            case UP:
+                return Direction.UP;
+            case DOWN:
+                return Direction.DOWN;
+            default:
+                throw new IllegalArgumentException("Illegal direction: " + face);
+        }
+    }
+
+    public static BlockType adapt(Block block) {
+        return new ForgeBlockType(block);
+    }
+
+    public static EntityType adapt(net.minecraft.entity.EntityType<?> entityType) {
+        return new ForgeEntityType(entityType);
+    }
+
+    public static net.minecraft.entity.EntityType<? extends Entity> adapt(EntityType entityType) {
+        return ((ForgeEntityType) entityType).getHandle();
+    }
+
+    public static ItemStack adapt(com.dfsek.terra.api.platform.inventory.ItemStack itemStack) {
+        return ((ForgeItemStack) itemStack).getHandle();
+    }
+
+    public static com.dfsek.terra.api.platform.inventory.ItemStack adapt(ItemStack itemStack) {
+        return new ForgeItemStack(itemStack);
+    }
+
+    public static com.dfsek.terra.api.platform.inventory.Item adapt(Item item) {
+        return new ForgeItem(item);
+    }
+
+    public static Enchantment adapt(net.minecraft.enchantment.Enchantment enchantment) {
+        return new ForgeEnchantment(enchantment);
+    }
+
+    public static net.minecraft.enchantment.Enchantment adapt(Enchantment enchantment) {
+        return ((ForgeEnchantment) enchantment).getHandle();
+    }
+
+    public IWorld adapt(ForgeWorldHandle worldHandle) {
+        return worldHandle.getWorld();
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/ForgeBiome.java

@@ -1,11 +1,11 @@
-package com.dfsek.terra.fabric.world;
+package com.dfsek.terra.forge.world;
 
 import com.dfsek.terra.api.platform.world.Biome;
 
-public class FabricBiome implements Biome {
+public class ForgeBiome implements Biome {
     private final net.minecraft.world.biome.Biome delegate;
 
-    public FabricBiome(net.minecraft.world.biome.Biome delegate) {
+    public ForgeBiome(net.minecraft.world.biome.Biome delegate) {
         this.delegate = delegate;
     }
 

platforms/forge/src/main/java/com/dfsek/terra/forge/world/ForgeTree.java

@@ -0,0 +1,44 @@
+package com.dfsek.terra.forge.world;
+
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.world.Tree;
+import com.dfsek.terra.api.util.collections.MaterialSet;
+import com.dfsek.terra.forge.world.generator.ForgeChunkGenerator;
+import com.dfsek.terra.forge.world.handles.world.ForgeWorldAccess;
+import com.dfsek.terra.profiler.ProfileFrame;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.ISeedReader;
+import net.minecraft.world.gen.ChunkGenerator;
+import net.minecraft.world.gen.feature.ConfiguredFeature;
+
+import java.util.Locale;
+import java.util.Random;
+
+public class ForgeTree implements Tree {
+    private final ConfiguredFeature<?, ?> delegate;
+    private final String id;
+    private final TerraPlugin main;
+
+    public ForgeTree(ConfiguredFeature<?, ?> delegate, String id, TerraPlugin main) {
+        this.delegate = delegate;
+        this.id = id;
+        this.main = main;
+    }
+
+    @Override
+    public boolean plant(Location l, Random r) {
+        try(ProfileFrame ignore = main.getProfiler().profile("fabric_tree:" + id.toLowerCase(Locale.ROOT))) {
+            ForgeWorldAccess fabricWorldAccess = ((ForgeWorldAccess) l.getWorld());
+            ChunkGenerator generatorWrapper = ((ForgeChunkGenerator) fabricWorldAccess.getGenerator()).getHandle();
+            return delegate.place((ISeedReader) fabricWorldAccess.getHandle(), generatorWrapper, r, new BlockPos(l.getBlockX(), l.getBlockY(), l.getBlockZ()));
+        }
+    }
+
+    @Override
+    public MaterialSet getSpawnable() {
+        return MaterialSet.get(main.getWorldHandle().createBlockData("minecraft:grass_block"),
+                main.getWorldHandle().createBlockData("minecraft:podzol"),
+                main.getWorldHandle().createBlockData("minecraft:mycelium"));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/ForgeWorldHandle.java

@@ -0,0 +1,36 @@
+package com.dfsek.terra.forge.world;
+
+import com.dfsek.terra.api.platform.entity.EntityType;
+import com.dfsek.terra.api.platform.handle.WorldHandle;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import com.mojang.brigadier.StringReader;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.minecraft.block.BlockState;
+import net.minecraft.command.arguments.BlockStateParser;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.registry.Registry;
+import net.minecraftforge.registries.ForgeRegistries;
+
+import java.util.Locale;
+
+public class ForgeWorldHandle implements WorldHandle {
+
+    @Override
+    public ForgeBlockData createBlockData(String data) {
+        BlockStateParser parser = new BlockStateParser(new StringReader(data), true);
+        try {
+            BlockState state = parser.parse(true).getState();
+            if(state == null) throw new IllegalArgumentException("Invalid data: " + data);
+            return ForgeAdapter.adapt(state);
+        } catch(CommandSyntaxException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    @Override
+    public EntityType getEntity(String id) {
+        ResourceLocation identifier = ResourceLocation.tryParse(id);
+        if(identifier == null) identifier = ResourceLocation.tryParse("minecraft:" + id.toLowerCase(Locale.ROOT));
+        return ForgeAdapter.adapt(ForgeRegistries.ENTITIES.getValue(identifier));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/TerraBiomeSource.java

@@ -0,0 +1,56 @@
+package com.dfsek.terra.forge.world;
+
+import com.dfsek.terra.api.world.biome.UserDefinedBiome;
+import com.dfsek.terra.api.world.biome.provider.BiomeProvider;
+import com.dfsek.terra.config.pack.ConfigPack;
+import com.dfsek.terra.forge.TerraForgePlugin;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.util.registry.RegistryLookupCodec;
+import net.minecraft.world.biome.Biome;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class TerraBiomeSource extends net.minecraft.world.biome.provider.BiomeProvider {
+    public static final Codec<ConfigPack> PACK_CODEC = (RecordCodecBuilder.create(config -> config.group(
+            Codec.STRING.fieldOf("pack").forGetter(pack -> pack.getTemplate().getID())
+    ).apply(config, config.stable(TerraForgePlugin.getInstance().getConfigRegistry()::get))));
+    public static final Codec<TerraBiomeSource> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+            RegistryLookupCodec.create(Registry.BIOME_REGISTRY).forGetter(source -> source.biomeRegistry),
+            Codec.LONG.fieldOf("seed").stable().forGetter(source -> source.seed),
+            PACK_CODEC.fieldOf("pack").stable().forGetter(source -> source.pack))
+            .apply(instance, instance.stable(TerraBiomeSource::new)));
+
+    private final Registry<Biome> biomeRegistry;
+    private final long seed;
+    private final BiomeProvider grid;
+    private final ConfigPack pack;
+
+    public TerraBiomeSource(Registry<Biome> biomes, long seed, ConfigPack pack) {
+        super(biomes.stream().collect(Collectors.toList()));
+        this.biomeRegistry = biomes;
+        this.seed = seed;
+        this.grid = pack.getBiomeProviderBuilder().build(seed);
+        this.pack = pack;
+    }
+
+    @Override
+    protected @NotNull Codec<? extends net.minecraft.world.biome.provider.BiomeProvider> codec() {
+        return CODEC;
+    }
+
+    @Override
+    public net.minecraft.world.biome.provider.@NotNull BiomeProvider withSeed(long seed) {
+        return new TerraBiomeSource(this.biomeRegistry, seed, pack);
+    }
+
+    @Override
+    public @NotNull Biome getNoiseBiome(int biomeX, int biomeY, int biomeZ) {
+        UserDefinedBiome biome = (UserDefinedBiome) grid.getBiome(biomeX << 2, biomeZ << 2);
+        return Objects.requireNonNull(biomeRegistry.get(new ResourceLocation("terra", TerraForgePlugin.createBiomeID(pack, biome.getID()))));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/ForgeBlock.java

@@ -0,0 +1,96 @@
+package com.dfsek.terra.forge.world.block;
+
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.block.Block;
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.BlockType;
+import com.dfsek.terra.api.platform.block.state.BlockState;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import com.dfsek.terra.forge.world.block.state.ForgeBlockState;
+import com.dfsek.terra.forge.world.handles.world.ForgeWorldAccess;
+import net.minecraft.block.FlowingFluidBlock;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.IWorld;
+
+public class ForgeBlock implements Block {
+    private final Handle delegate;
+
+    public ForgeBlock(BlockPos position, IWorld worldAccess) {
+        this.delegate = new Handle(position, worldAccess);
+    }
+
+    @Override
+    public void setBlockData(BlockData data, boolean physics) {
+        delegate.worldAccess.setBlock(delegate.position, ((ForgeBlockData) data).getHandle(), physics ? 3 : 1042);
+        if(physics && ((ForgeBlockData) data).getHandle().getBlock() instanceof FlowingFluidBlock) {
+            delegate.worldAccess.getLiquidTicks().scheduleTick(delegate.position, ((FlowingFluidBlock) ((ForgeBlockData) data).getHandle().getBlock()).getFluidState(((ForgeBlockData) data).getHandle()).getFluidState().getType(), 0);
+        }
+    }
+
+    @Override
+    public BlockData getBlockData() {
+        return new ForgeBlockData(delegate.worldAccess.getBlockState(delegate.position));
+    }
+
+    @Override
+    public BlockState getState() {
+        return ForgeBlockState.newInstance(this);
+    }
+
+    @Override
+    public Block getRelative(BlockFace face, int len) {
+        BlockPos newPos = delegate.position.offset(face.getModX() * len, face.getModY() * len, face.getModZ() * len);
+        return new ForgeBlock(newPos, delegate.worldAccess);
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return getBlockData().isAir();
+    }
+
+    @Override
+    public Location getLocation() {
+        return ForgeAdapter.adapt(delegate.position).toLocation(new ForgeWorldAccess(delegate.worldAccess));
+    }
+
+    @Override
+    public BlockType getType() {
+        return getBlockData().getBlockType();
+    }
+
+    @Override
+    public int getX() {
+        return delegate.position.getX();
+    }
+
+    @Override
+    public int getZ() {
+        return delegate.position.getZ();
+    }
+
+    @Override
+    public int getY() {
+        return delegate.position.getY();
+    }
+
+    @Override
+    public boolean isPassable() {
+        return isEmpty();
+    }
+
+    @Override
+    public Handle getHandle() {
+        return delegate;
+    }
+
+    public static final class Handle {
+        private final BlockPos position;
+        private final IWorld worldAccess;
+
+        public Handle(BlockPos position, IWorld worldAccess) {
+            this.position = position;
+            this.worldAccess = worldAccess;
+        }
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/ForgeBlockData.java

@@ -0,0 +1,84 @@
+package com.dfsek.terra.forge.world.block;
+
+import com.dfsek.terra.api.platform.block.BlockData;
+import com.dfsek.terra.api.platform.block.BlockType;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.state.Property;
+import net.minecraftforge.registries.ForgeRegistries;
+
+import javax.annotation.Nullable;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class ForgeBlockData implements BlockData {
+    private static final Function<Map.Entry<Property<?>, Comparable<?>>, String> PROPERTY_MAPPER = new Function<Map.Entry<Property<?>, Comparable<?>>, String>() {
+        public String apply(@Nullable Map.Entry<Property<?>, Comparable<?>> entry) {
+            if (entry == null) {
+                return "<NULL>";
+            } else {
+                Property<?> property = entry.getKey();
+                return property.getName() + "=" + this.getName(property, entry.getValue());
+            }
+        }
+
+        @SuppressWarnings("unchecked")
+        private <T extends Comparable<T>> String getName(Property<T> property, Comparable<?> comparable) {
+            return property.getName((T)comparable);
+        }
+    };
+
+    protected BlockState delegate;
+
+    public ForgeBlockData(BlockState delegate) {
+        this.delegate = delegate;
+    }
+
+    @Override
+    public BlockType getBlockType() {
+        return ForgeAdapter.adapt(delegate.getBlock());
+    }
+
+    @Override
+    public boolean matches(BlockData other) {
+        return delegate.getBlock() == ((ForgeBlockData) other).delegate.getBlock();
+    }
+
+    @Override
+    public BlockData clone() {
+        try {
+            return (ForgeBlockData) super.clone();
+        } catch(CloneNotSupportedException e) {
+            throw new Error(e);
+        }
+    }
+
+    @Override
+    public String getAsString() {
+        StringBuilder data = new StringBuilder(Objects.requireNonNull(ForgeRegistries.BLOCKS.getKey(delegate.getBlock())).toString());
+        if(!delegate.getProperties().isEmpty()) {
+            data.append('[');
+            data.append(delegate.getValues().entrySet().stream().map(PROPERTY_MAPPER).collect(Collectors.joining(",")));
+            data.append(']');
+        }
+        return data.toString();
+    }
+
+    @Override
+    public boolean isAir() {
+        return delegate.isAir();
+    }
+
+    @Override
+    public boolean isStructureVoid() {
+        return delegate.getBlock() == Blocks.STRUCTURE_VOID;
+    }
+
+    @Override
+    public BlockState getHandle() {
+        return delegate;
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/ForgeBlockType.java

@@ -1,15 +1,15 @@
-package com.dfsek.terra.fabric.world.block;
+package com.dfsek.terra.forge.world.block;
 
 import com.dfsek.terra.api.platform.block.BlockData;
 import com.dfsek.terra.api.platform.block.BlockType;
-import com.dfsek.terra.fabric.world.FabricAdapter;
+import com.dfsek.terra.forge.world.ForgeAdapter;
 import net.minecraft.block.Block;
 import net.minecraft.block.Blocks;
 
-public class FabricBlockType implements BlockType {
+public class ForgeBlockType implements BlockType {
     private final Block delegate;
 
-    public FabricBlockType(Block delegate) {
+    public ForgeBlockType(Block delegate) {
         this.delegate = delegate;
     }
 
@@ -20,12 +20,12 @@ public class FabricBlockType implements BlockType {
 
     @Override
     public BlockData getDefaultData() {
-        return FabricAdapter.adapt(delegate.getDefaultState());
+        return ForgeAdapter.adapt(delegate.defaultBlockState());
     }
 
     @Override
     public boolean isSolid() {
-        return delegate.getDefaultState().isOpaque();
+        return delegate.defaultBlockState().canOcclude();
     }
 
     @Override
@@ -40,7 +40,7 @@ public class FabricBlockType implements BlockType {
 
     @Override
     public boolean equals(Object obj) {
-        if(!(obj instanceof FabricBlockType)) return false;
-        return ((FabricBlockType) obj).delegate == delegate;
+        if(!(obj instanceof ForgeBlockType)) return false;
+        return ((ForgeBlockType) obj).delegate == delegate;
     }
 }

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeAnaloguePowerable.java

@@ -0,0 +1,29 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.data.AnaloguePowerable;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+
+/**
+ * None of this actually has implementation, TODO: implement this if we ever end up needing it.
+ */
+public class ForgeAnaloguePowerable extends ForgeBlockData implements AnaloguePowerable {
+    public ForgeAnaloguePowerable(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public int getMaximumPower() {
+        return 0;
+    }
+
+    @Override
+    public int getPower() {
+        return 0;
+    }
+
+    @Override
+    public void setPower(int power) {
+
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeDirectional.java

@@ -0,0 +1,42 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.data.Directional;
+import com.dfsek.terra.forge.world.ForgeAdapter;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.DirectionProperty;
+
+public class ForgeDirectional extends ForgeBlockData implements Directional {
+    private final DirectionProperty property;
+
+    public ForgeDirectional(BlockState delegate, DirectionProperty property) {
+        super(delegate);
+        this.property = property;
+    }
+
+    @Override
+    public BlockFace getFacing() {
+        switch(delegate.getValue(property)) {
+            case SOUTH:
+                return BlockFace.SOUTH;
+            case DOWN:
+                return BlockFace.DOWN;
+            case UP:
+                return BlockFace.UP;
+            case EAST:
+                return BlockFace.EAST;
+            case WEST:
+                return BlockFace.WEST;
+            case NORTH:
+                return BlockFace.NORTH;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    @Override
+    public void setFacing(BlockFace facing) {
+        delegate = delegate.setValue(property, ForgeAdapter.adapt(facing));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeEnumAdapter.java

@@ -1,17 +1,17 @@
-package com.dfsek.terra.fabric.world.block.data;
+package com.dfsek.terra.forge.world.block.data;
 
 import com.dfsek.terra.api.platform.block.Axis;
 import com.dfsek.terra.api.platform.block.BlockFace;
 import com.dfsek.terra.api.platform.block.data.Bisected;
 import com.dfsek.terra.api.platform.block.data.Slab;
 import com.dfsek.terra.api.platform.block.data.Stairs;
-import net.minecraft.block.enums.BlockHalf;
-import net.minecraft.block.enums.SlabType;
-import net.minecraft.block.enums.StairShape;
-import net.minecraft.util.math.Direction;
+import net.minecraft.state.properties.Half;
+import net.minecraft.state.properties.SlabType;
+import net.minecraft.state.properties.StairsShape;
+import net.minecraft.util.Direction;
 
-public final class FabricEnumAdapter {
-    public static Stairs.Shape adapt(StairShape shape) {
+public final class ForgeEnumAdapter {
+    public static Stairs.Shape adapt(StairsShape shape) {
         switch(shape) {
             case OUTER_RIGHT:
                 return Stairs.Shape.OUTER_RIGHT;
@@ -28,7 +28,7 @@ public final class FabricEnumAdapter {
         }
     }
 
-    public static Bisected.Half adapt(BlockHalf half) {
+    public static Bisected.Half adapt(Half half) {
         switch(half) {
             case BOTTOM:
                 return Bisected.Half.BOTTOM;
@@ -71,29 +71,29 @@ public final class FabricEnumAdapter {
         }
     }
 
-    public static StairShape adapt(Stairs.Shape shape) {
+    public static StairsShape adapt(Stairs.Shape shape) {
         switch(shape) {
             case STRAIGHT:
-                return StairShape.STRAIGHT;
+                return StairsShape.STRAIGHT;
             case INNER_LEFT:
-                return StairShape.INNER_LEFT;
+                return StairsShape.INNER_LEFT;
             case OUTER_LEFT:
-                return StairShape.OUTER_LEFT;
+                return StairsShape.OUTER_LEFT;
             case INNER_RIGHT:
-                return StairShape.INNER_RIGHT;
+                return StairsShape.INNER_RIGHT;
             case OUTER_RIGHT:
-                return StairShape.OUTER_RIGHT;
+                return StairsShape.OUTER_RIGHT;
             default:
                 throw new IllegalStateException();
         }
     }
 
-    public static BlockHalf adapt(Bisected.Half half) {
+    public static Half adapt(Bisected.Half half) {
         switch(half) {
             case TOP:
-                return BlockHalf.TOP;
+                return Half.TOP;
             case BOTTOM:
-                return BlockHalf.BOTTOM;
+                return Half.BOTTOM;
             default:
                 throw new IllegalStateException();
         }

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeMultipleFacing.java

@@ -0,0 +1,70 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.data.MultipleFacing;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.properties.BlockStateProperties;
+
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class ForgeMultipleFacing extends ForgeBlockData implements MultipleFacing {
+    public ForgeMultipleFacing(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public Set<BlockFace> getFaces() {
+        Set<BlockFace> set = new HashSet<>();
+        if(delegate.getValue(BlockStateProperties.NORTH)) set.add(BlockFace.NORTH);
+        if(delegate.getValue(BlockStateProperties.SOUTH)) set.add(BlockFace.SOUTH);
+        if(delegate.getValue(BlockStateProperties.EAST)) set.add(BlockFace.EAST);
+        if(delegate.getValue(BlockStateProperties.WEST)) set.add(BlockFace.WEST);
+        if(delegate.hasProperty(BlockStateProperties.UP) && delegate.getValue(BlockStateProperties.UP)) set.add(BlockFace.UP);
+        if(delegate.hasProperty(BlockStateProperties.DOWN) && delegate.getValue(BlockStateProperties.DOWN)) set.add(BlockFace.DOWN);
+        return set;
+    }
+
+    @Override
+    public void setFace(BlockFace face, boolean facing) {
+        switch(face) {
+            case NORTH:
+                delegate = delegate.setValue(BlockStateProperties.NORTH, facing);
+                break;
+            case SOUTH:
+                delegate = delegate.setValue(BlockStateProperties.SOUTH, facing);
+                break;
+            case EAST:
+                delegate = delegate.setValue(BlockStateProperties.EAST, facing);
+                break;
+            case WEST:
+                delegate = delegate.setValue(BlockStateProperties.WEST, facing);
+                break;
+            case UP:
+                delegate = delegate.setValue(BlockStateProperties.UP, facing);
+                break;
+            case DOWN:
+                delegate = delegate.setValue(BlockStateProperties.DOWN, facing);
+                break;
+        }
+    }
+
+    @Override
+    public Set<BlockFace> getAllowedFaces() {
+        Set<BlockFace> set = new HashSet<>();
+        if(delegate.hasProperty(BlockStateProperties.NORTH)) set.add(BlockFace.NORTH);
+        if(delegate.hasProperty(BlockStateProperties.SOUTH)) set.add(BlockFace.SOUTH);
+        if(delegate.hasProperty(BlockStateProperties.EAST)) set.add(BlockFace.EAST);
+        if(delegate.hasProperty(BlockStateProperties.WEST)) set.add(BlockFace.WEST);
+        if(delegate.hasProperty(BlockStateProperties.UP)) set.add(BlockFace.UP);
+        if(delegate.hasProperty(BlockStateProperties.DOWN)) set.add(BlockFace.DOWN);
+        return set;
+    }
+
+    @Override
+    public boolean hasFace(BlockFace f) {
+        return getFaces().contains(f);
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeOrientable.java

@@ -0,0 +1,37 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.Axis;
+import com.dfsek.terra.api.platform.block.data.Orientable;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.EnumProperty;
+import net.minecraft.util.Direction;
+
+
+import java.util.Arrays;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ForgeOrientable extends ForgeBlockData implements Orientable {
+    private final EnumProperty<Direction.Axis> property;
+
+    public ForgeOrientable(BlockState delegate, EnumProperty<Direction.Axis> property) {
+        super(delegate);
+        this.property = property;
+    }
+
+    @Override
+    public Set<Axis> getAxes() {
+        return Arrays.stream(Axis.values()).collect(Collectors.toSet());
+    }
+
+    @Override
+    public Axis getAxis() {
+        return ForgeEnumAdapter.adapt(getHandle().getValue(property));
+    }
+
+    @Override
+    public void setAxis(Axis axis) {
+        delegate = delegate.setValue(property, ForgeEnumAdapter.adapt(axis));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeRotatable.java

@@ -0,0 +1,111 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.data.Rotatable;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.properties.BlockStateProperties;
+
+public class ForgeRotatable extends ForgeBlockData implements Rotatable {
+    public ForgeRotatable(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public BlockFace getRotation() {
+        int r = delegate.getValue(BlockStateProperties.ROTATION_16);
+        switch(r) {
+            case 0:
+                return BlockFace.SOUTH;
+            case 1:
+                return BlockFace.SOUTH_SOUTH_WEST;
+            case 2:
+                return BlockFace.SOUTH_WEST;
+            case 3:
+                return BlockFace.WEST_SOUTH_WEST;
+            case 4:
+                return BlockFace.WEST;
+            case 5:
+                return BlockFace.WEST_NORTH_WEST;
+            case 6:
+                return BlockFace.NORTH_WEST;
+            case 7:
+                return BlockFace.NORTH_NORTH_WEST;
+            case 8:
+                return BlockFace.NORTH;
+            case 9:
+                return BlockFace.NORTH_NORTH_EAST;
+            case 10:
+                return BlockFace.NORTH_EAST;
+            case 11:
+                return BlockFace.EAST_NORTH_EAST;
+            case 12:
+                return BlockFace.EAST;
+            case 13:
+                return BlockFace.EAST_SOUTH_EAST;
+            case 14:
+                return BlockFace.SOUTH_EAST;
+            case 15:
+                return BlockFace.SOUTH_SOUTH_EAST;
+            default:
+                throw new IllegalArgumentException("Unknown rotation " + r);
+        }
+    }
+
+    @Override
+    public void setRotation(BlockFace face) {
+        switch(face) {
+            case UP:
+            case DOWN:
+                throw new IllegalArgumentException("Illegal rotation " + face);
+            case SOUTH:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 0);
+                return;
+            case SOUTH_SOUTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 1);
+                return;
+            case SOUTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 2);
+                return;
+            case WEST_SOUTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 3);
+                return;
+            case WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 4);
+                return;
+            case WEST_NORTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 5);
+                return;
+            case NORTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 6);
+                return;
+            case NORTH_NORTH_WEST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 7);
+                return;
+            case NORTH:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 8);
+                return;
+            case NORTH_NORTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 9);
+                return;
+            case NORTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 10);
+                return;
+            case EAST_NORTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 11);
+                return;
+            case EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 12);
+                return;
+            case EAST_SOUTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 13);
+                return;
+            case SOUTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 14);
+                return;
+            case SOUTH_SOUTH_EAST:
+                delegate = delegate.setValue(BlockStateProperties.ROTATION_16, 15);
+                return;
+        }
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeSlab.java

@@ -0,0 +1,21 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.data.Slab;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.properties.BlockStateProperties;
+
+public class ForgeSlab extends ForgeWaterlogged implements Slab {
+    public ForgeSlab(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public Type getType() {
+        return ForgeEnumAdapter.adapt(delegate.getValue(BlockStateProperties.SLAB_TYPE));
+    }
+
+    @Override
+    public void setType(Type type) {
+        delegate = delegate.setValue(BlockStateProperties.SLAB_TYPE, ForgeEnumAdapter.adapt(type));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeStairs.java

@@ -0,0 +1,42 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.BlockFace;
+import com.dfsek.terra.api.platform.block.data.Stairs;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.properties.BlockStateProperties;
+
+public class ForgeStairs extends ForgeWaterlogged implements Stairs {
+    public ForgeStairs(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public Shape getShape() {
+        return ForgeEnumAdapter.adapt(getHandle().getValue(BlockStateProperties.STAIRS_SHAPE));
+    }
+
+    @Override
+    public void setShape(Shape shape) {
+        super.delegate = getHandle().setValue(BlockStateProperties.STAIRS_SHAPE, ForgeEnumAdapter.adapt(shape));
+    }
+
+    @Override
+    public Half getHalf() {
+        return ForgeEnumAdapter.adapt(getHandle().getValue(BlockStateProperties.HALF));
+    }
+
+    @Override
+    public void setHalf(Half half) {
+        super.delegate = getHandle().setValue(BlockStateProperties.HALF, ForgeEnumAdapter.adapt(half));
+    }
+
+    @Override
+    public BlockFace getFacing() {
+        return ForgeEnumAdapter.adapt(getHandle().getValue(BlockStateProperties.HORIZONTAL_FACING));
+    }
+
+    @Override
+    public void setFacing(BlockFace facing) {
+        super.delegate = getHandle().setValue(BlockStateProperties.HORIZONTAL_FACING, ForgeEnumAdapter.adapt(facing));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/world/block/data/ForgeWaterlogged.java

@@ -0,0 +1,22 @@
+package com.dfsek.terra.forge.world.block.data;
+
+import com.dfsek.terra.api.platform.block.data.Waterlogged;
+import com.dfsek.terra.forge.world.block.ForgeBlockData;
+import net.minecraft.block.BlockState;
+import net.minecraft.state.properties.BlockStateProperties;
+
+public class ForgeWaterlogged extends ForgeBlockData implements Waterlogged {
+    public ForgeWaterlogged(BlockState delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public boolean isWaterlogged() {
+        return delegate.getValue(BlockStateProperties.WATERLOGGED);
+    }
+
+    @Override
+    public void setWaterlogged(boolean waterlogged) {
+        super.delegate = delegate.setValue(BlockStateProperties.WATERLOGGED, waterlogged);
+    }
+}