20w28a

bukkit-legacy/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

bukkit/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

bungee/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

common/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>

common/src/main/java/us/myles/ViaVersion/api/data/MappingDataLoader.java

@@ -14,6 +14,7 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.URL;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -205,7 +206,11 @@ public class MappingDataLoader {
         return null;
     }
 
-    private static InputStream getResource(String name) {
+    public static InputStream getResource(String name) {
         return MappingDataLoader.class.getClassLoader().getResourceAsStream("assets/viaversion/data/" + name);
     }
+
+    public static URL getResourceUrl(String name) {
+        return MappingDataLoader.class.getClassLoader().getResource("assets/viaversion/data/" + name);
+    }
 }

common/src/main/java/us/myles/ViaVersion/api/minecraft/BlockChangeRecord.java

@@ -1,29 +1,38 @@
 package us.myles.ViaVersion.api.minecraft;
 
-public class BlockChangeRecord {
+public interface BlockChangeRecord {
-    private final short horizontal;
-    private final short y;
-    private int blockId;
 
-    public BlockChangeRecord(short horizontal, short y, int blockId) {
+    /**
-        this.horizontal = horizontal;
+     * @return relative x coordinate within the chunk section
-        this.y = y;
+     */
-        this.blockId = blockId;
+    byte getSectionX();
+
+    /**
+     * @return relative y coordinate within the chunk section
+     */
+    byte getSectionY();
+
+    /**
+     * @return relative z coordinate within the chunk section
+     */
+    byte getSectionZ();
+
+    /**
+     * @param chunkSectionY chunk section
+     * @return absolute y coordinate
+     */
+    short getY(int chunkSectionY);
+
+    /**
+     * @return absolute y coordinate
+     * @deprecated 1.16+ stores the relative y coordinate
+     */
+    @Deprecated
+    default short getY() {
+        return getY(-1);
     }
 
-    public short getHorizontal() {
+    int getBlockId();
-        return horizontal;
-    }
 
-    public short getY() {
+    void setBlockId(int blockId);
-        return y;
-    }
-
-    public int getBlockId() {
-        return blockId;
-    }
-
-    public void setBlockId(int blockId) {
-        this.blockId = blockId;
-    }
 }

common/src/main/java/us/myles/ViaVersion/api/minecraft/BlockChangeRecord1_16_2.java

@@ -0,0 +1,50 @@
+package us.myles.ViaVersion.api.minecraft;
+
+import com.google.common.base.Preconditions;
+
+public class BlockChangeRecord1_16_2 implements BlockChangeRecord {
+    private final byte sectionX;
+    private final byte sectionY;
+    private final byte sectionZ;
+    private int blockId;
+
+    public BlockChangeRecord1_16_2(byte sectionX, byte sectionY, byte sectionZ, int blockId) {
+        this.sectionX = sectionX;
+        this.sectionY = sectionY;
+        this.sectionZ = sectionZ;
+        this.blockId = blockId;
+    }
+
+    public BlockChangeRecord1_16_2(int sectionX, int sectionY, int sectionZ, int blockId) {
+        this((byte) sectionX, (byte) sectionY, (byte) sectionZ, blockId);
+    }
+
+    @Override
+    public byte getSectionX() {
+        return sectionX;
+    }
+
+    @Override
+    public byte getSectionY() {
+        return sectionY;
+    }
+
+    @Override
+    public byte getSectionZ() {
+        return sectionZ;
+    }
+
+    @Override
+    public short getY(int chunkSectionY) {
+        Preconditions.checkArgument(chunkSectionY >= 0 && chunkSectionY < 16);
+        return (short) ((chunkSectionY << 4) + sectionY);
+    }
+
+    public int getBlockId() {
+        return blockId;
+    }
+
+    public void setBlockId(int blockId) {
+        this.blockId = blockId;
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/BlockChangeRecord1_8.java

@@ -0,0 +1,54 @@
+package us.myles.ViaVersion.api.minecraft;
+
+public class BlockChangeRecord1_8 implements BlockChangeRecord {
+    private final byte sectionX;
+    private final short y;
+    private final byte sectionZ;
+    private int blockId;
+
+    public BlockChangeRecord1_8(byte sectionX, short y, byte sectionZ, int blockId) {
+        this.sectionX = sectionX;
+        this.y = y;
+        this.sectionZ = sectionZ;
+        this.blockId = blockId;
+    }
+
+    public BlockChangeRecord1_8(int sectionX, int y, int sectionZ, int blockId) {
+        this((byte) sectionX, (short) y, (byte) sectionZ, blockId);
+    }
+
+    /**
+     * @return x coordinate within the chunk section
+     */
+    public byte getSectionX() {
+        return sectionX;
+    }
+
+    @Override
+    public byte getSectionY() {
+        return (byte) (y & 0xF);
+    }
+
+    /**
+     * @return y coordinate
+     */
+    @Override
+    public short getY(int chunkSectionY) {
+        return y;
+    }
+
+    /**
+     * @return z coordinate within the chunk section
+     */
+    public byte getSectionZ() {
+        return sectionZ;
+    }
+
+    public int getBlockId() {
+        return blockId;
+    }
+
+    public void setBlockId(int blockId) {
+        this.blockId = blockId;
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/protocol/ProtocolVersion.java

@@ -84,7 +84,7 @@ public class ProtocolVersion {
         register(v1_15_2 = new ProtocolVersion(578, "1.15.2"));
         register(v1_16 = new ProtocolVersion(735, "1.16"));
         register(v1_16_1 = new ProtocolVersion(736, "1.16.1"));
-        register(v1_16_2 = new ProtocolVersion(738, "1.16.2"));
+        register(v1_16_2 = new ProtocolVersion(740, "1.16.2"));
 
         register(unknown = new ProtocolVersion(-1, "UNKNOWN"));
     }

common/src/main/java/us/myles/ViaVersion/api/rewriters/BlockRewriter.java

@@ -63,9 +63,22 @@ public class BlockRewriter {
             public void registerMap() {
                 map(Type.INT); // 0 - Chunk X
                 map(Type.INT); // 1 - Chunk Z
-                map(Type.BLOCK_CHANGE_RECORD_ARRAY); // 2 - Records
                 handler(wrapper -> {
-                    for (BlockChangeRecord record : wrapper.get(Type.BLOCK_CHANGE_RECORD_ARRAY, 0)) {
+                    for (BlockChangeRecord record : wrapper.passthrough(Type.BLOCK_CHANGE_RECORD_ARRAY)) {
+                        record.setBlockId(blockStateRewriter.rewrite(record.getBlockId()));
+                    }
+                });
+            }
+        });
+    }
+
+    public void registerVarLongMultiBlockChange(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.LONG); // Chunk position
+                handler(wrapper -> {
+                    for (BlockChangeRecord record : wrapper.passthrough(Type.VAR_LONG_BLOCK_CHANGE_RECORD_ARRAY)) {
                         record.setBlockId(blockStateRewriter.rewrite(record.getBlockId()));
                     }
                 });

common/src/main/java/us/myles/ViaVersion/api/type/Type.java

@@ -3,10 +3,51 @@ package us.myles.ViaVersion.api.type;
 
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.google.gson.JsonElement;
-import us.myles.ViaVersion.api.minecraft.*;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.EulerAngle;
+import us.myles.ViaVersion.api.minecraft.Position;
+import us.myles.ViaVersion.api.minecraft.Vector;
+import us.myles.ViaVersion.api.minecraft.VillagerData;
 import us.myles.ViaVersion.api.minecraft.item.Item;
-import us.myles.ViaVersion.api.type.types.*;
+import us.myles.ViaVersion.api.type.types.ArrayType;
-import us.myles.ViaVersion.api.type.types.minecraft.*;
+import us.myles.ViaVersion.api.type.types.BooleanType;
+import us.myles.ViaVersion.api.type.types.ByteArrayType;
+import us.myles.ViaVersion.api.type.types.ByteType;
+import us.myles.ViaVersion.api.type.types.ComponentType;
+import us.myles.ViaVersion.api.type.types.DoubleType;
+import us.myles.ViaVersion.api.type.types.FloatType;
+import us.myles.ViaVersion.api.type.types.IntType;
+import us.myles.ViaVersion.api.type.types.LongType;
+import us.myles.ViaVersion.api.type.types.RemainingBytesType;
+import us.myles.ViaVersion.api.type.types.ShortType;
+import us.myles.ViaVersion.api.type.types.StringType;
+import us.myles.ViaVersion.api.type.types.UUIDIntArrayType;
+import us.myles.ViaVersion.api.type.types.UUIDType;
+import us.myles.ViaVersion.api.type.types.UnsignedByteType;
+import us.myles.ViaVersion.api.type.types.UnsignedShortType;
+import us.myles.ViaVersion.api.type.types.VarIntArrayType;
+import us.myles.ViaVersion.api.type.types.VarIntType;
+import us.myles.ViaVersion.api.type.types.VarLongType;
+import us.myles.ViaVersion.api.type.types.VoidType;
+import us.myles.ViaVersion.api.type.types.minecraft.BlockChangeRecordType;
+import us.myles.ViaVersion.api.type.types.minecraft.EulerAngleType;
+import us.myles.ViaVersion.api.type.types.minecraft.FlatItemArrayType;
+import us.myles.ViaVersion.api.type.types.minecraft.FlatItemType;
+import us.myles.ViaVersion.api.type.types.minecraft.FlatVarIntItemArrayType;
+import us.myles.ViaVersion.api.type.types.minecraft.FlatVarIntItemType;
+import us.myles.ViaVersion.api.type.types.minecraft.ItemArrayType;
+import us.myles.ViaVersion.api.type.types.minecraft.ItemType;
+import us.myles.ViaVersion.api.type.types.minecraft.NBTType;
+import us.myles.ViaVersion.api.type.types.minecraft.OptPosition1_14Type;
+import us.myles.ViaVersion.api.type.types.minecraft.OptPositionType;
+import us.myles.ViaVersion.api.type.types.minecraft.OptUUIDType;
+import us.myles.ViaVersion.api.type.types.minecraft.OptionalComponentType;
+import us.myles.ViaVersion.api.type.types.minecraft.OptionalVarIntType;
+import us.myles.ViaVersion.api.type.types.minecraft.Position1_14Type;
+import us.myles.ViaVersion.api.type.types.minecraft.PositionType;
+import us.myles.ViaVersion.api.type.types.minecraft.VarLongBlockChangeRecordType;
+import us.myles.ViaVersion.api.type.types.minecraft.VectorType;
+import us.myles.ViaVersion.api.type.types.minecraft.VillagerDataType;
 
 import java.util.UUID;
 
@@ -94,7 +135,7 @@ public abstract class Type<T> implements ByteBufReader<T>, ByteBufWriter<T> {
     public static final Type<Integer[]> VAR_INT_ARRAY = new ArrayType<>(Type.VAR_INT);
     public static final Type<int[]> VAR_INT_ARRAY_PRIMITIVE = new VarIntArrayType();
     public static final Type<Integer> OPTIONAL_VAR_INT = new OptionalVarIntType();
-    public static final Type<Long> VAR_LONG = new VarLongType();
+    public static final VarLongType VAR_LONG = new VarLongType();
     /**
      * @deprecated unreasonable overhead
      */
@@ -121,6 +162,9 @@ public abstract class Type<T> implements ByteBufReader<T>, ByteBufWriter<T> {
     public static final Type<BlockChangeRecord> BLOCK_CHANGE_RECORD = new BlockChangeRecordType();
     public static final Type<BlockChangeRecord[]> BLOCK_CHANGE_RECORD_ARRAY = new ArrayType<>(Type.BLOCK_CHANGE_RECORD);
 
+    public static final Type<BlockChangeRecord> VAR_LONG_BLOCK_CHANGE_RECORD = new VarLongBlockChangeRecordType();
+    public static final Type<BlockChangeRecord[]> VAR_LONG_BLOCK_CHANGE_RECORD_ARRAY = new ArrayType<>(Type.VAR_LONG_BLOCK_CHANGE_RECORD);
+
     public static final Type<VillagerData> VILLAGER_DATA = new VillagerDataType();
 
     /* 1.13 Flat Item (no data) */

common/src/main/java/us/myles/ViaVersion/api/type/types/VarLongType.java

@@ -10,10 +10,25 @@ public class VarLongType extends Type<Long> implements TypeConverter<Long> {
         super("VarLong", Long.class);
     }
 
-    @Override
+    public long readPrimitive(ByteBuf buffer) {
-    public void write(ByteBuf buffer, Long object) {
+        long out = 0;
+        int bytes = 0;
+        byte in;
+        do {
+            in = buffer.readByte();
+
+            out |= (long) (in & 0x7F) << (bytes++ * 7);
+
+            if (bytes > 10) { // 10 is maxBytes
+                throw new RuntimeException("VarLong too big");
+            }
+        } while ((in & 0x80) == 0x80);
+        return out;
+    }
+
+    public void writePrimitive(ByteBuf buffer, long object) {
         int part;
-        while (true) {
+        do {
             part = (int) (object & 0x7F);
 
             object >>>= 7;
@@ -22,35 +37,26 @@ public class VarLongType extends Type<Long> implements TypeConverter<Long> {
             }
 
             buffer.writeByte(part);
-
+        } while (object != 0);
-            if (object == 0) {
-                break;
-            }
-        }
     }
 
+    /**
+     * @deprecated use {@link #readPrimitive(ByteBuf)} for manual reading to avoid wrapping
+     */
     @Override
+    @Deprecated
     public Long read(ByteBuf buffer) {
-        long out = 0;
+        return readPrimitive(buffer);
-        int bytes = 0;
-        byte in;
-        while (true) {
-            in = buffer.readByte();
-
-            out |= (in & 0x7F) << (bytes++ * 7);
-
-            if (bytes > 10) { // 10 is maxBytes
-                throw new RuntimeException("VarLong too big");
-            }
-
-            if ((in & 0x80) != 0x80) {
-                break;
-            }
-        }
-
-        return out;
     }
 
+    /**
+     * @deprecated use {@link #writePrimitive(ByteBuf, long)} for manual reading to avoid wrapping
+     */
+    @Override
+    @Deprecated
+    public void write(ByteBuf buffer, Long object) {
+        writePrimitive(buffer, object);
+    }
 
     @Override
     public Long from(Object o) {

common/src/main/java/us/myles/ViaVersion/api/type/types/minecraft/BlockChangeRecordType.java

@@ -2,26 +2,25 @@ package us.myles.ViaVersion.api.type.types.minecraft;
 
 import io.netty.buffer.ByteBuf;
 import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord1_8;
 import us.myles.ViaVersion.api.type.Type;
 
 public class BlockChangeRecordType extends Type<BlockChangeRecord> {
+
     public BlockChangeRecordType() {
         super(BlockChangeRecord.class);
     }
 
     @Override
     public BlockChangeRecord read(ByteBuf buffer) throws Exception {
-        short horizontal = Type.UNSIGNED_BYTE.read(buffer);
+        short position = Type.SHORT.readPrimitive(buffer);
-        short y = Type.UNSIGNED_BYTE.read(buffer);
         int blockId = Type.VAR_INT.readPrimitive(buffer);
-
+        return new BlockChangeRecord1_8(position >> 12 & 0xF, position & 0xFF, position >> 8 & 0xF, blockId);
-        return new BlockChangeRecord(horizontal, y, blockId);
     }
 
     @Override
     public void write(ByteBuf buffer, BlockChangeRecord object) throws Exception {
-        Type.UNSIGNED_BYTE.write(buffer, object.getHorizontal());
+        Type.SHORT.writePrimitive(buffer, (short) (object.getSectionX() << 12 | object.getSectionZ() << 8 | object.getY()));
-        Type.UNSIGNED_BYTE.write(buffer, object.getY());
         Type.VAR_INT.writePrimitive(buffer, object.getBlockId());
     }
 }

common/src/main/java/us/myles/ViaVersion/api/type/types/minecraft/VarLongBlockChangeRecordType.java

@@ -0,0 +1,26 @@
+package us.myles.ViaVersion.api.type.types.minecraft;
+
+import io.netty.buffer.ByteBuf;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord1_16_2;
+import us.myles.ViaVersion.api.type.Type;
+
+public class VarLongBlockChangeRecordType extends Type<BlockChangeRecord> {
+
+    public VarLongBlockChangeRecordType() {
+        super(BlockChangeRecord.class);
+    }
+
+    @Override
+    public BlockChangeRecord read(ByteBuf buffer) throws Exception {
+        long data = Type.VAR_LONG.readPrimitive(buffer);
+        short position = (short) (data & 0xFFFL);
+        return new BlockChangeRecord1_16_2(position >>> 8 & 0xF, position & 0xF, position >>> 4 & 0xF, (int) (data >>> 12));
+    }
+
+    @Override
+    public void write(ByteBuf buffer, BlockChangeRecord object) throws Exception {
+        short position = (short) (object.getSectionX() << 8 | object.getSectionZ() << 4 | object.getSectionY());
+        Type.VAR_LONG.writePrimitive(buffer, (long) object.getBlockId() << 12 | position);
+    }
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/blockconnections/ConnectionData.java

@@ -11,7 +11,7 @@ import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.MappingDataLoader;
 import us.myles.ViaVersion.api.data.UserConnection;
-import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord1_8;
 import us.myles.ViaVersion.api.minecraft.BlockFace;
 import us.myles.ViaVersion.api.minecraft.Position;
 import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
@@ -29,7 +29,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 
 public class ConnectionData {
-    private static final BlockChangeRecord[] EMPTY_RECORDS = new BlockChangeRecord[0];
+    private static final BlockChangeRecord1_8[] EMPTY_RECORDS = new BlockChangeRecord1_8[0];
     public static BlockConnectionProvider blockConnectionProvider;
     static Int2ObjectMap<String> idToKey = new Int2ObjectOpenHashMap<>(8582, 1F);
     static Map<String, Integer> keyToId = new HashMap<>(8582, 1F);
@@ -61,7 +61,7 @@ public class ConnectionData {
             for (int chunkDeltaZ = -1; chunkDeltaZ <= 1; chunkDeltaZ++) {
                 if (Math.abs(chunkDeltaX) + Math.abs(chunkDeltaZ) == 0) continue;
 
-                List<BlockChangeRecord> updates = new ArrayList<>();
+                List<BlockChangeRecord1_8> updates = new ArrayList<>();
 
                 if (Math.abs(chunkDeltaX) + Math.abs(chunkDeltaZ) == 2) { // Corner
                     for (int blockY = chunkSectionY * 16; blockY < chunkSectionY * 16 + 16; blockY++) {
@@ -132,13 +132,13 @@ public class ConnectionData {
         }
     }
 
-    public static void updateBlock(UserConnection user, Position pos, List<BlockChangeRecord> records) {
+    public static void updateBlock(UserConnection user, Position pos, List<BlockChangeRecord1_8> records) {
         int blockState = blockConnectionProvider.getBlockData(user, pos.getX(), pos.getY(), pos.getZ());
         ConnectionHandler handler = getConnectionHandler(blockState);
         if (handler == null) return;
 
         int newBlockState = handler.connect(user, pos, blockState);
-        records.add(new BlockChangeRecord((short) (((pos.getX() & 0xF) << 4) | (pos.getZ() & 0xF)), pos.getY(), newBlockState));
+        records.add(new BlockChangeRecord1_8(pos.getX() & 0xF, pos.getY(), pos.getZ() & 0xF, newBlockState));
     }
 
     public static void updateBlockStorage(UserConnection userConnection, int x, int y, int z, int blockState) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/WorldPackets.java

@@ -207,9 +207,9 @@ public class WorldPackets {
                         for (BlockChangeRecord record : records) {
                             int newBlock = toNewId(record.getBlockId());
                             Position position = new Position(
-                                    (record.getHorizontal() >> 4 & 15) + (chunkX * 16),
+                                    record.getSectionX() + (chunkX * 16),
                                     record.getY(),
-                                    (record.getHorizontal() & 15) + (chunkZ * 16));
+                                    record.getSectionZ() + (chunkZ * 16));
 
                             if (Via.getConfig().isServersideBlockConnections()) {
                                 ConnectionData.updateBlockStorage(userConnection, position.getX(), position.getY(), position.getZ(), newBlock);
@@ -222,9 +222,9 @@ public class WorldPackets {
                                 int blockState = record.getBlockId();
 
                                 Position position = new Position(
-                                        (record.getHorizontal() >> 4 & 15) + (chunkX * 16),
+                                        record.getSectionX() + (chunkX * 16),
                                         record.getY(),
-                                        (record.getHorizontal() & 15) + (chunkZ * 16));
+                                        record.getSectionZ() + (chunkZ * 16));
 
                                 ConnectionHandler handler = ConnectionData.getConnectionHandler(blockState);
                                 if (handler != null) {
@@ -238,9 +238,9 @@ public class WorldPackets {
 
                             for (BlockChangeRecord record : records) {
                                 Position position = new Position(
-                                        (record.getHorizontal() >> 4 & 15) + (chunkX * 16),
+                                        record.getSectionX() + (chunkX * 16),
                                         record.getY(),
-                                        (record.getHorizontal() & 15) + (chunkZ * 16));
+                                        record.getSectionZ() + (chunkZ * 16));
                                 ConnectionData.update(userConnection, position);
                             }
                         }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/ClientboundPackets1_16_2.java

@@ -0,0 +1,99 @@
+package us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1;
+
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+
+public enum ClientboundPackets1_16_2 implements ClientboundPacketType {
+
+    SPAWN_ENTITY, // 0x00
+    SPAWN_EXPERIENCE_ORB, // 0x01
+    SPAWN_MOB, // 0x02
+    SPAWN_PAINTING, // 0x03
+    SPAWN_PLAYER, // 0x04
+    ENTITY_ANIMATION, // 0x05
+    STATISTICS, // 0x06
+    ACKNOWLEDGE_PLAYER_DIGGING, // 0x07
+    BLOCK_BREAK_ANIMATION, // 0x08
+    BLOCK_ENTITY_DATA, // 0x09
+    BLOCK_ACTION, // 0x0A
+    BLOCK_CHANGE, // 0x0B
+    BOSSBAR, // 0x0C
+    SERVER_DIFFICULTY, // 0x0D
+    CHAT_MESSAGE, // 0x0E
+    TAB_COMPLETE, // 0x0F
+    DECLARE_COMMANDS, // 0x10
+    WINDOW_CONFIRMATION, // 0x11
+    CLOSE_WINDOW, // 0x12
+    WINDOW_ITEMS, // 0x13
+    WINDOW_PROPERTY, // 0x14
+    SET_SLOT, // 0x15
+    COOLDOWN, // 0x16
+    PLUGIN_MESSAGE, // 0x17
+    NAMED_SOUND, // 0x18
+    DISCONNECT, // 0x19
+    ENTITY_STATUS, // 0x1A
+    EXPLOSION, // 0x1B
+    UNLOAD_CHUNK, // 0x1C
+    GAME_EVENT, // 0x1D
+    OPEN_HORSE_WINDOW, // 0x1E
+    KEEP_ALIVE, // 0x1F
+    CHUNK_DATA, // 0x20
+    EFFECT, // 0x21
+    SPAWN_PARTICLE, // 0x22
+    UPDATE_LIGHT, // 0x23
+    JOIN_GAME, // 0x24
+    MAP_DATA, // 0x25
+    TRADE_LIST, // 0x26
+    ENTITY_POSITION, // 0x27
+    ENTITY_POSITION_AND_ROTATION, // 0x28
+    ENTITY_ROTATION, // 0x29
+    ENTITY_MOVEMENT, // 0x2A
+    VEHICLE_MOVE, // 0x2B
+    OPEN_BOOK, // 0x2C
+    OPEN_WINDOW, // 0x2D
+    OPEN_SIGN_EDITOR, // 0x2E
+    CRAFT_RECIPE_RESPONSE, // 0x2F
+    PLAYER_ABILITIES, // 0x30
+    COMBAT_EVENT, // 0x31
+    PLAYER_INFO, // 0x32
+    FACE_PLAYER, // 0x33
+    PLAYER_POSITION, // 0x34
+    UNLOCK_RECIPES, // 0x35
+    DESTROY_ENTITIES, // 0x36
+    REMOVE_ENTITY_EFFECT, // 0x37
+    RESOURCE_PACK, // 0x38
+    RESPAWN, // 0x39
+    ENTITY_HEAD_LOOK, // 0x3A
+    MULTI_BLOCK_CHANGE, // 0x3B
+    SELECT_ADVANCEMENTS_TAB, // 0x3C
+    WORLD_BORDER, // 0x3D
+    CAMERA, // 0x3E
+    HELD_ITEM_CHANGE, // 0x3F
+    UPDATE_VIEW_POSITION, // 0x40
+    UPDATE_VIEW_DISTANCE, // 0x41
+    SPAWN_POSITION, // 0x42
+    DISPLAY_SCOREBOARD, // 0x43
+    ENTITY_METADATA, // 0x44
+    ATTACH_ENTITY, // 0x45
+    ENTITY_VELOCITY, // 0x46
+    ENTITY_EQUIPMENT, // 0x47
+    SET_EXPERIENCE, // 0x48
+    UPDATE_HEALTH, // 0x49
+    SCOREBOARD_OBJECTIVE, // 0x4A
+    SET_PASSENGERS, // 0x4B
+    TEAMS, // 0x4C
+    UPDATE_SCORE, // 0x4D
+    TIME_UPDATE, // 0x4E
+    TITLE, // 0x4F
+    ENTITY_SOUND, // 0x50
+    SOUND, // 0x51
+    STOP_SOUND, // 0x52
+    TAB_LIST, // 0x53
+    NBT_QUERY, // 0x54
+    COLLECT_ITEM, // 0x55
+    ENTITY_TELEPORT, // 0x56
+    ADVANCEMENTS, // 0x57
+    ENTITY_PROPERTIES, // 0x58
+    ENTITY_EFFECT, // 0x59
+    DECLARE_RECIPES, // 0x5A
+    TAGS, // 0x5B
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/Protocol1_16_2To1_16_1.java

@@ -18,12 +18,12 @@ import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ClientboundPackets1_16
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ServerboundPackets1_16;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 
-public class Protocol1_16_2To1_16_1 extends Protocol<ClientboundPackets1_16, ClientboundPackets1_16, ServerboundPackets1_16, ServerboundPackets1_16_2> {
+public class Protocol1_16_2To1_16_1 extends Protocol<ClientboundPackets1_16, ClientboundPackets1_16_2, ServerboundPackets1_16, ServerboundPackets1_16_2> {
 
     private TagRewriter tagRewriter;
 
     public Protocol1_16_2To1_16_1() {
-        super(ClientboundPackets1_16.class, ClientboundPackets1_16.class, ServerboundPackets1_16.class, ServerboundPackets1_16_2.class, true);
+        super(ClientboundPackets1_16.class, ClientboundPackets1_16_2.class, ServerboundPackets1_16.class, ServerboundPackets1_16_2.class, true);
     }
 
     @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/data/MappingData.java

@@ -1,12 +1,18 @@
 package us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.data;
 
+import com.github.steveice10.opennbt.NBTIO;
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.google.gson.JsonObject;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.MappingDataLoader;
 import us.myles.ViaVersion.api.data.Mappings;
 import us.myles.ViaVersion.util.Int2IntBiMap;
 
+import java.io.File;
+import java.io.IOException;
+
 public class MappingData {
+    public static CompoundTag dimensionRegistry;
     public static Int2IntBiMap oldToNewItems = new Int2IntBiMap();
     public static Mappings blockMappings;
     public static Mappings blockStateMappings;
@@ -17,6 +23,13 @@ public class MappingData {
         JsonObject mapping1_16 = MappingDataLoader.loadData("mapping-1.16.json", true);
         JsonObject mapping1_16_2 = MappingDataLoader.loadData("mapping-1.16.2.json", true);
 
+        try {
+            dimensionRegistry = NBTIO.readFile(new File(MappingDataLoader.getResourceUrl("dimenstion-registry-1.16.2.nbt").getFile()));
+        } catch (IOException e) {
+            Via.getPlatform().getLogger().severe("Error loading dimenstion registry:");
+            e.printStackTrace();
+        }
+
         oldToNewItems.defaultReturnValue(-1);
         blockStateMappings = new Mappings(mapping1_16.getAsJsonObject("blockstates"), mapping1_16_2.getAsJsonObject("blockstates"));
         blockMappings = new Mappings(mapping1_16.getAsJsonObject("blocks"), mapping1_16_2.getAsJsonObject("blocks"));

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/packets/EntityPackets.java

@@ -5,6 +5,7 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
 import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.Protocol1_16_2To1_16_1;
+import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.metadata.MetadataRewriter1_16_2To1_16_1;
 import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.storage.EntityTracker1_16_2;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ClientboundPackets1_16;
@@ -35,7 +36,11 @@ public class EntityPackets {
                 });
                 map(Type.BYTE); // Previous Gamemode
                 map(Type.STRING_ARRAY); // World List
-                map(Type.NBT); // Dimension Registry
+                handler(wrapper -> {
+                    // Throw away the old dimension registry, extra conversion would be too hard of a hit
+                    wrapper.read(Type.NBT);
+                    wrapper.write(Type.NBT, MappingData.dimensionRegistry);
+                });
                 map(Type.STRING); // Dimension Type
                 map(Type.STRING); // Dimension
                 map(Type.LONG); // Seed

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/packets/WorldPackets.java

@@ -1,5 +1,6 @@
 package us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.packets;
 
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
 import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
 import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
 import us.myles.ViaVersion.api.protocol.Protocol;
@@ -7,6 +8,7 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.BlockRewriter;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.Protocol1_16_2To1_16_1;
+import us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.types.Chunk1_16_2Type;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ClientboundPackets1_16;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.types.Chunk1_16Type;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
@@ -18,7 +20,6 @@ public class WorldPackets {
 
         blockRewriter.registerBlockAction(ClientboundPackets1_16.BLOCK_ACTION);
         blockRewriter.registerBlockChange(ClientboundPackets1_16.BLOCK_CHANGE);
-        blockRewriter.registerMultiBlockChange(ClientboundPackets1_16.MULTI_BLOCK_CHANGE);
         blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_16.ACKNOWLEDGE_PLAYER_DIGGING);
 
         protocol.registerOutgoing(ClientboundPackets1_16.CHUNK_DATA, new PacketRemapper() {
@@ -26,7 +27,9 @@ public class WorldPackets {
             public void registerMap() {
                 handler(wrapper -> {
                     ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
-                    Chunk chunk = wrapper.passthrough(new Chunk1_16Type(clientWorld));
+                    Chunk chunk = wrapper.read(new Chunk1_16Type(clientWorld));
+                    wrapper.write(new Chunk1_16_2Type(clientWorld), chunk);
+
                     for (int s = 0; s < 16; s++) {
                         ChunkSection section = chunk.getSections()[s];
                         if (section == null) continue;
@@ -39,8 +42,49 @@ public class WorldPackets {
             }
         });
 
+        protocol.registerOutgoing(ClientboundPackets1_16.MULTI_BLOCK_CHANGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    wrapper.cancel();
+
+                    int chunkX = wrapper.read(Type.INT);
+                    int chunkZ = wrapper.read(Type.INT);
+                    wrapper.write(Type.LONG, asLong(chunkX, 0, chunkZ)); //TODO
+
+                    BlockChangeRecord[] blockChangeRecord = wrapper.read(Type.BLOCK_CHANGE_RECORD_ARRAY);
+                    wrapper.write(Type.VAR_LONG_BLOCK_CHANGE_RECORD_ARRAY, blockChangeRecord);
+                    for (BlockChangeRecord record : blockChangeRecord) {
+                        record.setBlockId(Protocol1_16_2To1_16_1.getNewBlockId(record.getBlockId()));
+                    }
+                });
+            }
+        });
+
         blockRewriter.registerEffect(ClientboundPackets1_16.EFFECT, 1010, 2001, InventoryPackets::getNewItemId);
         blockRewriter.registerSpawnParticle(ClientboundPackets1_16.SPAWN_PARTICLE, 3, 23, 34,
                 null, InventoryPackets::toClient, Type.FLAT_VAR_INT_ITEM, Type.DOUBLE);
     }
+
+    //TODO to chunk coordinates
+    public static int x(final long long1) {
+        return (int) (long1 >> 42);
+    }
+
+    public static int y(final long long1) {
+        return (int) (long1 << 44 >> 44);
+    }
+
+    public static int z(final long long1) {
+        return (int) (long1 << 22 >> 42);
+    }
+
+
+    public static long asLong(final int x, final int y, final int z) {
+        long long4 = 0L;
+        long4 |= (x & 0x3FFFFFL) << 42;
+        long4 |= (y & 0xFFFFFL);
+        long4 |= (z & 0x3FFFFFL) << 20;
+        return long4;
+    }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16_2to1_16_1/types/Chunk1_16_2Type.java

@@ -0,0 +1,106 @@
+package us.myles.ViaVersion.protocols.protocol1_16_2to1_16_1.types;
+
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import io.netty.buffer.ByteBuf;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.minecraft.chunks.BaseChunk;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
+import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
+import us.myles.ViaVersion.api.type.PartialType;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.minecraft.BaseChunkType;
+import us.myles.ViaVersion.api.type.types.version.Types1_16;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class Chunk1_16_2Type extends PartialType<Chunk, ClientWorld> {
+    private static final CompoundTag[] EMPTY_COMPOUNDS = new CompoundTag[0];
+
+    public Chunk1_16_2Type(ClientWorld param) {
+        super(param, Chunk.class);
+    }
+
+    @Override
+    public Chunk read(ByteBuf input, ClientWorld world) throws Exception {
+        int chunkX = input.readInt();
+        int chunkZ = input.readInt();
+
+        boolean fullChunk = input.readBoolean();
+        boolean ignoreOldLightData = input.readBoolean();
+        int primaryBitmask = Type.VAR_INT.readPrimitive(input);
+        CompoundTag heightMap = Type.NBT.read(input);
+
+        int[] biomeData = null;
+        if (fullChunk) {
+            biomeData = Type.VAR_INT_ARRAY_PRIMITIVE.read(input);
+        }
+
+        Type.VAR_INT.readPrimitive(input); // data size in bytes
+
+        // Read sections
+        ChunkSection[] sections = new ChunkSection[16];
+        for (int i = 0; i < 16; i++) {
+            if ((primaryBitmask & (1 << i)) == 0) continue; // Section not set
+
+            short nonAirBlocksCount = input.readShort();
+            ChunkSection section = Types1_16.CHUNK_SECTION.read(input);
+            section.setNonAirBlocksCount(nonAirBlocksCount);
+            sections[i] = section;
+        }
+
+        List<CompoundTag> nbtData = new ArrayList<>(Arrays.asList(Type.NBT_ARRAY.read(input)));
+
+        // Read all the remaining bytes (workaround for #681)
+        if (input.readableBytes() > 0) {
+            byte[] array = Type.REMAINING_BYTES.read(input);
+            if (Via.getManager().isDebug()) {
+                Via.getPlatform().getLogger().warning("Found " + array.length + " more bytes than expected while reading the chunk: " + chunkX + "/" + chunkZ);
+            }
+        }
+
+        return new BaseChunk(chunkX, chunkZ, fullChunk, ignoreOldLightData, primaryBitmask, sections, biomeData, heightMap, nbtData);
+    }
+
+    @Override
+    public void write(ByteBuf output, ClientWorld world, Chunk chunk) throws Exception {
+        output.writeInt(chunk.getX());
+        output.writeInt(chunk.getZ());
+
+        output.writeBoolean(chunk.isFullChunk());
+        output.writeBoolean(chunk.isIgnoreOldLightData());
+        Type.VAR_INT.writePrimitive(output, chunk.getBitmask());
+        Type.NBT.write(output, chunk.getHeightMap());
+
+        // Write biome data
+        if (chunk.isBiomeData()) {
+            Type.VAR_INT_ARRAY_PRIMITIVE.write(output, chunk.getBiomeData());
+        }
+
+        ByteBuf buf = output.alloc().buffer();
+        try {
+            for (int i = 0; i < 16; i++) {
+                ChunkSection section = chunk.getSections()[i];
+                if (section == null) continue; // Section not set
+
+                buf.writeShort(section.getNonAirBlocksCount());
+                Types1_16.CHUNK_SECTION.write(buf, section);
+            }
+            buf.readerIndex(0);
+            Type.VAR_INT.writePrimitive(output, buf.readableBytes());
+            output.writeBytes(buf);
+        } finally {
+            buf.release(); // release buffer
+        }
+
+        // Write Block Entities
+        Type.NBT_ARRAY.write(output, chunk.getBlockEntities().toArray(EMPTY_COMPOUNDS));
+    }
+
+    @Override
+    public Class<? extends Type> getBaseClass() {
+        return BaseChunkType.class;
+    }
+}

fabric/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

jar/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <name>viaversion-jar</name>

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>us.myles</groupId>
     <artifactId>viaversion-parent</artifactId>
-    <version>3.0.2-20w27a</version>
+    <version>3.0.2-20w28a</version>
     <packaging>pom</packaging>
 
     <name>viaversion-parent</name>

sponge-legacy/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

sponge/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

velocity/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>3.0.2-20w27a</version>
+        <version>3.0.2-20w28a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>