1.16 pre3

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

@@ -80,7 +80,7 @@ public class ProtocolVersion {
         register(v1_15 = new ProtocolVersion(573, "1.15"));
         register(v1_15_1 = new ProtocolVersion(575, "1.15.1"));
         register(v1_15_2 = new ProtocolVersion(578, "1.15.2"));
-        register(v1_16 = new ProtocolVersion(722, "1.16"));
+        register(v1_16 = new ProtocolVersion(725, "1.16"));
 
         register(unknown = new ProtocolVersion(-1, "UNKNOWN"));
     }

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

@@ -10,7 +10,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class TagRewriter {
-    public static final int[] EMPTY_ARRAY = {};
+    private static final int[] EMPTY_ARRAY = {-1};
     private final Protocol protocol;
     private final IdRewriteFunction blockRewriter;
     private final IdRewriteFunction itemRewriter;
@@ -26,6 +26,9 @@ public class TagRewriter {
         this.entityRewriter = entityRewriter;
     }
 
+    /**
+     * Adds an empty tag (since the client crashes if a checked tag is not registered.)
+     */
     public void addEmptyTag(TagType tagType, String id) {
         getNewTags(tagType).add(new TagData(id, EMPTY_ARRAY));
     }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/Protocol1_16To1_15_2.java

@@ -104,6 +104,29 @@ public class Protocol1_16To1_15_2 extends Protocol<ClientboundPackets1_15, Clien
             }
         });
 
+        registerIncoming(ServerboundPackets1_16.INTERACT_ENTITY, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    wrapper.passthrough(Type.VAR_INT); // Entity Id
+                    int action =  wrapper.passthrough(Type.VAR_INT);
+                    if (action == 0 || action == 2) {
+                        if (action == 2) {
+                            // Location
+                            wrapper.passthrough(Type.FLOAT);
+                            wrapper.passthrough(Type.FLOAT);
+                            wrapper.passthrough(Type.FLOAT);
+                        }
+
+                        wrapper.passthrough(Type.VAR_INT); // Hand
+
+                        // New boolean: Whether the client is sneaking/pressing shift
+                        wrapper.read(Type.BOOLEAN);
+                    }
+                });
+            }
+        });
+
         cancelIncoming(ServerboundPackets1_16.GENERATE_JIGSAW);
         cancelIncoming(ServerboundPackets1_16.UPDATE_JIGSAW_BLOCK);
     }
@@ -164,7 +187,8 @@ public class Protocol1_16To1_15_2 extends Protocol<ClientboundPackets1_15, Clien
     @Override
     public void init(UserConnection userConnection) {
         userConnection.put(new EntityTracker1_16(userConnection));
-        if (!userConnection.has(ClientWorld.class))
+        if (!userConnection.has(ClientWorld.class)) {
             userConnection.put(new ClientWorld(userConnection));
+        }
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/EntityPackets.java

@@ -3,15 +3,14 @@ package us.myles.ViaVersion.protocols.protocol1_16to1_15_2.packets;
 import com.github.steveice10.opennbt.tag.builtin.ByteTag;
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.FloatTag;
+import com.github.steveice10.opennbt.tag.builtin.IntTag;
 import com.github.steveice10.opennbt.tag.builtin.ListTag;
 import com.github.steveice10.opennbt.tag.builtin.LongTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
-import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.entities.Entity1_16Types;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
-import us.myles.ViaVersion.api.remapper.ValueTransformer;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
@@ -53,6 +52,7 @@ public class EntityPackets {
     static {
         ListTag list = new ListTag("dimension", CompoundTag.class);
         list.add(createOverworldEntry());
+        list.add(createOverworldCavesEntry());
         list.add(createNetherEntry());
         list.add(createEndEntry());
         DIMENSIONS_TAG.put(list);
@@ -60,45 +60,69 @@ public class EntityPackets {
 
     private static CompoundTag createOverworldEntry() {
         CompoundTag tag = new CompoundTag("");
-        tag.put(new StringTag("key", "minecraft:overworld"));
+        tag.put(new StringTag("name", "minecraft:overworld"));
-        CompoundTag elementTag = new CompoundTag("element");
+        tag.put(new ByteTag("has_ceiling", (byte) 0));
-        elementTag.put(new ByteTag("natural", (byte) 1));
+        addSharedOverwaldEntries(tag);
-        elementTag.put(new FloatTag("ambient_light", 0));
-        elementTag.put(new ByteTag("shrunk", (byte) 0));
-        elementTag.put(new ByteTag("ultrawarm", (byte) 0));
-        elementTag.put(new ByteTag("has_ceiling", (byte) 0));
-        elementTag.put(new ByteTag("has_skylight", (byte) 1));
-        tag.put(elementTag);
         return tag;
     }
 
+    private static CompoundTag createOverworldCavesEntry() {
+        CompoundTag tag = new CompoundTag("");
+        tag.put(new StringTag("name", "minecraft:overworld_caves"));
+        tag.put(new ByteTag("has_ceiling", (byte) 1));
+        addSharedOverwaldEntries(tag);
+        return tag;
+    }
+
+    private static void addSharedOverwaldEntries(CompoundTag tag) {
+        tag.put(new ByteTag("piglin_safe", (byte) 0));
+        tag.put(new ByteTag("natural", (byte) 1));
+        tag.put(new FloatTag("ambient_light", 0));
+        tag.put(new StringTag("infiniburn", "minecraft:infiniburn_overworld"));
+        tag.put(new ByteTag("respawn_anchor_works", (byte) 0));
+        tag.put(new ByteTag("has_skylight", (byte) 1));
+        tag.put(new ByteTag("bed_works", (byte) 1));
+        tag.put(new ByteTag("has_raids", (byte) 1));
+        tag.put(new IntTag("logical_height", 256));
+        tag.put(new ByteTag("shrunk", (byte) 0));
+        tag.put(new ByteTag("ultrawarm", (byte) 0));
+    }
+
     private static CompoundTag createNetherEntry() {
         CompoundTag tag = new CompoundTag("");
-        tag.put(new StringTag("key", "minecraft:the_nether"));
+        tag.put(new ByteTag("piglin_safe", (byte) 1));
-        CompoundTag elementTag = new CompoundTag("element");
+        tag.put(new ByteTag("natural", (byte) 0));
-        elementTag.put(new ByteTag("natural", (byte) 0));
+        tag.put(new FloatTag("ambient_light", 0.1F));
-        elementTag.put(new LongTag("fixed_time", 18000));
+        tag.put(new StringTag("infiniburn", "minecraft:infiniburn_nether"));
-        elementTag.put(new FloatTag("ambient_light", 0.1F));
+        tag.put(new ByteTag("respawn_anchor_works", (byte) 1));
-        elementTag.put(new ByteTag("shrunk", (byte) 1));
+        tag.put(new ByteTag("has_skylight", (byte) 0));
-        elementTag.put(new ByteTag("ultrawarm", (byte) 1));
+        tag.put(new ByteTag("bed_works", (byte) 0));
-        elementTag.put(new ByteTag("has_ceiling", (byte) 1));
+        tag.put(new LongTag("fixed_time", 18000));
-        elementTag.put(new ByteTag("has_skylight", (byte) 0));
+        tag.put(new ByteTag("has_raids", (byte) 0));
-        tag.put(elementTag);
+        tag.put(new StringTag("name", "minecraft:the_nether"));
+        tag.put(new IntTag("logical_height", 128));
+        tag.put(new ByteTag("shrunk", (byte) 1));
+        tag.put(new ByteTag("ultrawarm", (byte) 1));
+        tag.put(new ByteTag("has_ceiling", (byte) 1));
         return tag;
     }
 
     private static CompoundTag createEndEntry() {
         CompoundTag tag = new CompoundTag("");
-        tag.put(new StringTag("key", "minecraft:the_end"));
+        tag.put(new ByteTag("piglin_safe", (byte) 0));
-        CompoundTag elementTag = new CompoundTag("element");
+        tag.put(new ByteTag("natural", (byte) 0));
-        elementTag.put(new ByteTag("natural", (byte) 0));
+        tag.put(new FloatTag("ambient_light", 0));
-        elementTag.put(new LongTag("fixed_time", 6000));
+        tag.put(new StringTag("infiniburn", "minecraft:infiniburn_end"));
-        elementTag.put(new FloatTag("ambient_light", 0));
+        tag.put(new ByteTag("respawn_anchor_works", (byte) 0));
-        elementTag.put(new ByteTag("shrunk", (byte) 0));
+        tag.put(new ByteTag("has_skylight", (byte) 0));
-        elementTag.put(new ByteTag("ultrawarm", (byte) 0));
+        tag.put(new ByteTag("bed_works", (byte) 0));
-        elementTag.put(new ByteTag("has_ceiling", (byte) 0));
+        tag.put(new LongTag("fixed_time", 6000));
-        elementTag.put(new ByteTag("has_skylight", (byte) 0));
+        tag.put(new ByteTag("has_raids", (byte) 1));
-        tag.put(elementTag);
+        tag.put(new StringTag("name", "minecraft:the_end"));
+        tag.put(new IntTag("logical_height", 256));
+        tag.put(new ByteTag("shrunk", (byte) 0));
+        tag.put(new ByteTag("ultrawarm", (byte) 0));
+        tag.put(new ByteTag("has_ceiling", (byte) 0));
         return tag;
     }
 
@@ -161,17 +185,9 @@ public class EntityPackets {
             public void registerMap() {
                 map(Type.INT); // Entity ID
                 map(Type.UNSIGNED_BYTE); //  Gamemode
-                map(Type.NOTHING, new ValueTransformer<Void, String[]>(Type.STRING_ARRAY) { // World list - only used for command completion
+                handler(wrapper -> {
-                    @Override
+                    wrapper.write(Type.STRING_ARRAY, WORLD_NAMES); // World list - only used for command completion
-                    public String[] transform(PacketWrapper wrapper, Void input) throws Exception {
+                    wrapper.write(Type.NBT, DIMENSIONS_TAG); // Dimension registry
-                        return WORLD_NAMES;
-                    }
-                });
-                map(Type.NOTHING, new ValueTransformer<Void, CompoundTag>(Type.NBT) { // whatever this is
-                    @Override
-                    public CompoundTag transform(PacketWrapper wrapper, Void input) throws Exception {
-                        return DIMENSIONS_TAG;
-                    }
                 });
                 handler(DIMENSION_HANDLER); // Dimension
                 map(Type.LONG); // Seed

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/WorldPackets.java

@@ -31,6 +31,15 @@ public class WorldPackets {
         blockRewriter.registerMultiBlockChange(ClientboundPackets1_15.MULTI_BLOCK_CHANGE);
         blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_15.ACKNOWLEDGE_PLAYER_DIGGING);
 
+        protocol.registerOutgoing(ClientboundPackets1_15.UPDATE_LIGHT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // x
+                map(Type.VAR_INT); // y
+                handler(wrapper -> wrapper.write(Type.BOOLEAN, true)); // Take neighbour's light into account as well
+            }
+        });
+
         protocol.registerOutgoing(ClientboundPackets1_15.CHUNK_DATA, new PacketRemapper() {
             @Override
             public void registerMap() {