1.16.2-pre3

api/src/main/java/com/velocitypowered/api/network/ProtocolVersion.java

@@ -37,7 +37,7 @@ public enum ProtocolVersion {
   MINECRAFT_1_15_2(578, "1.15.2"),
   MINECRAFT_1_16(735, "1.16"),
   MINECRAFT_1_16_1(736, "1.16.1"),
-  MINECRAFT_1_16_2(746, "1.16.2");
+  MINECRAFT_1_16_2(748, "1.16.2");
 
   private final int protocol;
   private final String name;

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -342,14 +342,15 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         player.getMinecraftConnection().delayedWrite(
                 new Respawn(tempDim, joinGame.getPartialHashedSeed(), joinGame.getDifficulty(),
                     joinGame.getGamemode(), joinGame.getLevelType(),
-                        false, joinGame.getDimensionInfo(), joinGame.getPreviousGamemode()));
+                    false, joinGame.getDimensionInfo(), joinGame.getPreviousGamemode(),
+                    joinGame.getCurrentDimensionData()));
       }
 
       player.getMinecraftConnection().delayedWrite(
           new Respawn(joinGame.getDimension(), joinGame.getPartialHashedSeed(),
               joinGame.getDifficulty(), joinGame.getGamemode(), joinGame.getLevelType(),
-                  false, joinGame.getDimensionInfo(), joinGame.getPreviousGamemode()));
+              false, joinGame.getDimensionInfo(), joinGame.getPreviousGamemode(),
-
+              joinGame.getCurrentDimensionData()));
       destination.setActiveDimensionRegistry(joinGame.getDimensionRegistry()); // 1.16
     }
 

proxy/src/main/java/com/velocitypowered/proxy/connection/registry/DimensionData.java

@@ -6,6 +6,8 @@ import net.kyori.nbt.CompoundTag;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public final class DimensionData {
+  private static final String UNKNOWN_DIMENSION_ID = "velocity:unknown_dimension";
+
   private final String registryIdentifier;
   private final @Nullable Integer dimensionId;
   private final boolean isNatural;
@@ -151,22 +153,34 @@ public final class DimensionData {
   }
 
   /**
-   * Parses a given CompoundTag to a DimensionData instance.
+   * Returns a fresh {@link DimensionData} with the specified {@code registryIdentifier}
-   * @param dimTag the compound from the registry to read
+   * and {@code dimensionId}.
-   * @param version the protocol version from the registry
+   *
+   * @param registryIdentifier the identifier for the dimension from the registry
+   * @param dimensionId optional, dimension ID
+   * @return a new {@link DimensionData}
+   */
+  public DimensionData annotateWith(String registryIdentifier,
+      @Nullable Integer dimensionId) {
+    return new DimensionData(registryIdentifier, dimensionId, isNatural, ambientLight, isShrunk,
+        isUltrawarm, hasCeiling, hasSkylight, isPiglinSafe, doBedsWork, doRespawnAnchorsWork,
+        hasRaids, logicalHeight, burningBehaviourIdentifier, fixedTime, createDragonFight,
+        coordinateScale);
+  }
+
+  public boolean isUnannotated() {
+    return this.registryIdentifier.equalsIgnoreCase(UNKNOWN_DIMENSION_ID);
+  }
+
+  /**
+   * Parses a given CompoundTag to a DimensionData instance. Assumes the data only contains
+   * dimension details.
+   *
+   * @param details the compound from the registry to read
+   * @param version the protocol version
    * @return game dimension data
    */
-  public static DimensionData decodeCompoundTag(CompoundTag dimTag, ProtocolVersion version) {
+  public static DimensionData decodeBaseCompoundTag(CompoundTag details, ProtocolVersion version) {
-    Preconditions.checkNotNull(dimTag, "CompoundTag cannot be null");
-    String registryIdentifier = dimTag.getString("name");
-    CompoundTag details;
-    Integer dimensionId = null;
-    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
-      dimensionId = dimTag.getInt("id");
-      details = dimTag.getCompound("element");
-    } else {
-      details = dimTag;
-    }
     boolean isNatural = details.getBoolean("natural");
     float ambientLight = details.getFloat("ambient_light");
     boolean isShrunk = details.getBoolean("shrunk");
@@ -186,12 +200,34 @@ public final class DimensionData {
     Double coordinateScale = details.contains("coordinate_scale")
         ? details.getDouble("coordinate_scale") : null;
     return new DimensionData(
-            registryIdentifier, dimensionId, isNatural, ambientLight, isShrunk,
+        UNKNOWN_DIMENSION_ID, null, isNatural, ambientLight, isShrunk,
         isUltrawarm, hasCeiling, hasSkylight, isPiglinSafe, doBedsWork, doRespawnAnchorsWork,
         hasRaids, logicalHeight, burningBehaviourIdentifier, fixedTime, hasEnderdragonFight,
         coordinateScale);
   }
 
+  /**
+   * Parses a given CompoundTag to a DimensionData instance. Assumes the data is part of a
+   * dimension registry.
+   * @param dimTag the compound from the registry to read
+   * @param version the protocol version
+   * @return game dimension data
+   */
+  public static DimensionData decodeRegistryEntry(CompoundTag dimTag, ProtocolVersion version) {
+    String registryIdentifier = dimTag.getString("name");
+    CompoundTag details;
+    Integer dimensionId = null;
+    if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
+      dimensionId = dimTag.getInt("id");
+      details = dimTag.getCompound("element");
+    } else {
+      details = dimTag;
+    }
+
+    DimensionData deserializedDetails = decodeBaseCompoundTag(details, version);
+    return deserializedDetails.annotateWith(registryIdentifier, dimensionId);
+  }
+
   /**
    * Encodes the Dimension data as CompoundTag.
    * @param version the version to serialize as
@@ -215,7 +251,7 @@ public final class DimensionData {
     }
   }
 
-  private CompoundTag serializeDimensionDetails() {
+  public CompoundTag serializeDimensionDetails() {
     CompoundTag ret = new CompoundTag();
     ret.putBoolean("natural", isNatural);
     ret.putFloat("ambient_light", ambientLight);

proxy/src/main/java/com/velocitypowered/proxy/connection/registry/DimensionInfo.java

@@ -1,6 +1,7 @@
 package com.velocitypowered.proxy.connection.registry;
 
 import com.google.common.base.Preconditions;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public final class DimensionInfo {
 
@@ -16,18 +17,13 @@ public final class DimensionInfo {
    * @param isFlat if true will set world lighting below surface-level to not display fog
    * @param isDebugType if true constrains the world to the very limited debug-type world
    */
-  public DimensionInfo(String registryIdentifier, String levelName,
+  public DimensionInfo(String registryIdentifier, @Nullable String levelName,
                        boolean isFlat, boolean isDebugType) {
     this.registryIdentifier = Preconditions.checkNotNull(
         registryIdentifier, "registryIdentifier cannot be null");
-    Preconditions.checkArgument(
+    Preconditions.checkArgument(registryIdentifier.length() > 0,
-        registryIdentifier.length() > 0,
-        "registryIdentifier cannot be empty");
-    this.levelName = Preconditions.checkNotNull(
-            levelName, "levelName cannot be null");
-    Preconditions.checkArgument(
-        levelName.length() > 0,
         "registryIdentifier cannot be empty");
+    this.levelName = levelName;
     this.isFlat = isFlat;
     this.isDebugType = isDebugType;
   }
@@ -40,7 +36,7 @@ public final class DimensionInfo {
     return isFlat;
   }
 
-  public String getLevelName() {
+  public @Nullable String getLevelName() {
     return levelName;
   }
 

proxy/src/main/java/com/velocitypowered/proxy/connection/registry/DimensionRegistry.java

@@ -97,7 +97,7 @@ public final class DimensionRegistry {
     ImmutableSet.Builder<DimensionData> mappings = ImmutableSet.builder();
     for (Tag iter : toParse) {
       if (iter instanceof CompoundTag) {
-        mappings.add(DimensionData.decodeCompoundTag((CompoundTag) iter, version));
+        mappings.add(DimensionData.decodeRegistryEntry((CompoundTag) iter, version));
       }
     }
     return mappings.build();

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/JoinGame.java

@@ -28,6 +28,7 @@ public class JoinGame implements MinecraftPacket {
   private boolean showRespawnScreen;
   private DimensionRegistry dimensionRegistry; // 1.16+
   private DimensionInfo dimensionInfo; // 1.16+
+  private DimensionData currentDimensionData; // 1.16.2+
   private short previousGamemode; // 1.16+
   private CompoundTag biomeRegistry; // 1.16.2+
 
@@ -139,6 +140,10 @@ public class JoinGame implements MinecraftPacket {
     this.biomeRegistry = biomeRegistry;
   }
 
+  public DimensionData getCurrentDimensionData() {
+    return currentDimensionData;
+  }
+
   @Override
   public String toString() {
     return "JoinGame{"
@@ -186,8 +191,15 @@ public class JoinGame implements MinecraftPacket {
       ImmutableSet<DimensionData> readData =
               DimensionRegistry.fromGameData(dimensionRegistryContainer, version);
       this.dimensionRegistry = new DimensionRegistry(readData, levelNames);
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
+        CompoundTag currentDimDataTag = ProtocolUtils.readCompoundTag(buf);
+        dimensionIdentifier = ProtocolUtils.readString(buf);
+        this.currentDimensionData = DimensionData.decodeBaseCompoundTag(currentDimDataTag, version)
+            .annotateWith(dimensionIdentifier, null);
+      } else {
         dimensionIdentifier = ProtocolUtils.readString(buf);
         levelName = ProtocolUtils.readString(buf);
+      }
     } else if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
       this.dimension = buf.readInt();
     } else {
@@ -246,8 +258,13 @@ public class JoinGame implements MinecraftPacket {
         registryContainer.put("dimension", encodedDimensionRegistry);
       }
       ProtocolUtils.writeCompoundTag(buf, registryContainer);
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
+        ProtocolUtils.writeCompoundTag(buf, currentDimensionData.serializeDimensionDetails());
+        ProtocolUtils.writeString(buf, dimensionInfo.getRegistryIdentifier());
+      } else {
         ProtocolUtils.writeString(buf, dimensionInfo.getRegistryIdentifier());
         ProtocolUtils.writeString(buf, dimensionInfo.getLevelName());
+      }
     } else if (version.compareTo(ProtocolVersion.MINECRAFT_1_9_1) >= 0) {
       buf.writeInt(dimension);
     } else {

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/Respawn.java

@@ -2,10 +2,12 @@ package com.velocitypowered.proxy.protocol.packet;
 
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.proxy.connection.MinecraftSessionHandler;
+import com.velocitypowered.proxy.connection.registry.DimensionData;
 import com.velocitypowered.proxy.connection.registry.DimensionInfo;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
 import com.velocitypowered.proxy.protocol.ProtocolUtils;
 import io.netty.buffer.ByteBuf;
+import net.kyori.nbt.CompoundTag;
 
 public class Respawn implements MinecraftPacket {
 
@@ -15,15 +17,16 @@ public class Respawn implements MinecraftPacket {
   private short gamemode;
   private String levelType = "";
   private boolean shouldKeepPlayerData; // 1.16+
-  private DimensionInfo dimensionInfo; // 1.16+
+  private DimensionInfo dimensionInfo; // 1.16-1.16.1
   private short previousGamemode; // 1.16+
+  private DimensionData currentDimensionData; // 1.16.2+
 
   public Respawn() {
   }
 
   public Respawn(int dimension, long partialHashedSeed, short difficulty, short gamemode,
       String levelType, boolean shouldKeepPlayerData, DimensionInfo dimensionInfo,
-                 short previousGamemode) {
+      short previousGamemode, DimensionData currentDimensionData) {
     this.dimension = dimension;
     this.partialHashedSeed = partialHashedSeed;
     this.difficulty = difficulty;
@@ -32,6 +35,7 @@ public class Respawn implements MinecraftPacket {
     this.shouldKeepPlayerData = shouldKeepPlayerData;
     this.dimensionInfo = dimensionInfo;
     this.previousGamemode = previousGamemode;
+    this.currentDimensionData = currentDimensionData;
   }
 
   public int getDimension() {
@@ -99,8 +103,9 @@ public class Respawn implements MinecraftPacket {
         + ", gamemode=" + gamemode
         + ", levelType='" + levelType + '\''
         + ", shouldKeepPlayerData=" + shouldKeepPlayerData
-        + ", dimensionRegistryName='" + dimensionInfo.toString() + '\''
+        + ", dimensionInfo=" + dimensionInfo
         + ", previousGamemode=" + previousGamemode
+        + ", dimensionData=" + currentDimensionData
         + '}';
   }
 
@@ -109,8 +114,15 @@ public class Respawn implements MinecraftPacket {
     String dimensionIdentifier = null;
     String levelName = null;
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
+        CompoundTag dimDataTag = ProtocolUtils.readCompoundTag(buf);
+        dimensionIdentifier = ProtocolUtils.readString(buf);
+        this.currentDimensionData = DimensionData.decodeBaseCompoundTag(dimDataTag, version)
+            .annotateWith(dimensionIdentifier, null);
+      } else {
         dimensionIdentifier = ProtocolUtils.readString(buf);
         levelName = ProtocolUtils.readString(buf);
+      }
     } else {
       this.dimension = buf.readInt();
     }
@@ -135,8 +147,13 @@ public class Respawn implements MinecraftPacket {
   @Override
   public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion version) {
     if (version.compareTo(ProtocolVersion.MINECRAFT_1_16) >= 0) {
+      if (version.compareTo(ProtocolVersion.MINECRAFT_1_16_2) >= 0) {
+        ProtocolUtils.writeCompoundTag(buf, currentDimensionData.serializeDimensionDetails());
+        ProtocolUtils.writeString(buf, dimensionInfo.getRegistryIdentifier());
+      } else {
         ProtocolUtils.writeString(buf, dimensionInfo.getRegistryIdentifier());
         ProtocolUtils.writeString(buf, dimensionInfo.getLevelName());
+      }
     } else {
       buf.writeInt(dimension);
     }