Not tested pose handling

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

@@ -192,7 +192,6 @@ public class ConnectionData {
                     }
                 }
             }
-            updateChunkSectionNeighbours(user, chunk.getX(), chunk.getZ(), i);
         }
     }
 

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/MetadataRewriter.java

@@ -53,7 +53,18 @@ public class MetadataRewriter {
                     }
                 }
 
-                if (type.isOrHasParent(Entity1_14Types.EntityType.ZOMBIE)) {
+                if (type.isOrHasParent(Entity1_14Types.EntityType.PLAYER)) {
+                    if (metadata.getId() == 0) {
+                        byte flags = ((Number) metadata.getValue()).byteValue();
+                        // Mojang overrides the client-side pose updater, see OtherPlayerEntity#updateSize
+                        tracker.setEntityFlags(entityId, flags);
+                    } else if (metadata.getId() == 7) {
+                        tracker.setRiptide(entityId, (((Number) metadata.getValue()).byteValue() & 0x4) != 0);
+                    }
+                    if (metadata.getId() == 0 || metadata.getId() == 7) {
+                        metadatas.add(new Metadata(6, MetaType1_14.Pose, recalculatePlayerPose(entityId, tracker)));
+                    }
+                } else if (type.isOrHasParent(Entity1_14Types.EntityType.ZOMBIE)) {
                     if (metadata.getId() == 16) {
                         tracker.setInsentientData(entityId, (byte) ((tracker.getInsentientData(entityId) & ~0x4)
                                 | ((boolean) metadata.getValue() ? 0x4 : 0))); // New attacking
@@ -107,7 +118,8 @@ public class MetadataRewriter {
                     }
                 } else if (type.is(Entity1_14Types.EntityType.FIREWORKS_ROCKET)) {
                     if (metadata.getId() == 8) {
-                        if (metadata.getValue().equals(0)) metadata.setValue(null); // https://bugs.mojang.com/browse/MC-111480
+                        if (metadata.getValue().equals(0))
+                            metadata.setValue(null); // https://bugs.mojang.com/browse/MC-111480
                         metadata.setMetaType(MetaType1_14.OptVarInt);
                     }
                 } else if (type.isOrHasParent(Entity1_14Types.EntityType.ABSTRACT_SKELETON)) {
@@ -150,6 +162,14 @@ public class MetadataRewriter {
         }
     }
 
+    private static boolean isSneaking(byte flags) {
+        return (flags & 0x2) != 0;
+    }
+
+    private static boolean isSwimming(byte flags) {
+        return (flags & 0x10) != 0;
+    }
+
     private static int getNewProfessionId(int old) {
         // profession -> career
         switch (old) {
@@ -170,6 +190,28 @@ public class MetadataRewriter {
         }
     }
 
+    private static boolean isFallFlying(int entityFlags) {
+        return (entityFlags & 0x80) != 0;
+    }
+
+    private static int recalculatePlayerPose(int entityId, EntityTracker tracker) {
+        byte flags = tracker.getEntityFlags(entityId);
+        // Mojang overrides the client-side pose updater, see OtherPlayerEntity#updateSize
+        int pose = 0; // standing
+        if (isFallFlying(flags)) {
+            pose = 1;
+        } else if (tracker.isSleeping(entityId)) {
+            pose = 2;
+        } else if (isSwimming(flags)) {
+            pose = 3;
+        } else if (tracker.isRiptide(entityId)) {
+            pose = 4;
+        } else if (isSneaking(flags)) {
+            pose = 5;
+        }
+        return pose;
+    }
+
     public static int getNewParticleId(int id) {
         if (id >= 10) {
             id += 2; // new lava drips 10, 11

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/packets/EntityPackets.java

@@ -195,6 +195,9 @@ public class EntityPackets {
                     public void handle(PacketWrapper wrapper) throws Exception {
                         short animation = wrapper.passthrough(Type.UNSIGNED_BYTE);
                         if (animation == 2) {  //Leave bed
+                            EntityTracker tracker = wrapper.user().get(EntityTracker.class);
+                            tracker.setSleeping(wrapper.get(Type.VAR_INT, 0), false);
+
                             PacketWrapper metadataPacket = wrapper.create(0x43);
                             metadataPacket.write(Type.VAR_INT, wrapper.get(Type.VAR_INT, 0));
                             List<Metadata> metadataList = new LinkedList<>();
@@ -215,6 +218,9 @@ public class EntityPackets {
                 handler(new PacketHandler() {
                     @Override
                     public void handle(PacketWrapper wrapper) throws Exception {
+                        EntityTracker tracker = wrapper.user().get(EntityTracker.class);
+                        tracker.setSleeping(wrapper.get(Type.VAR_INT, 0), true);
+
                         Position position = wrapper.read(Type.POSITION);
                         List<Metadata> metadataList = new LinkedList<>();
                         metadataList.add(new Metadata(12, MetaType1_14.OptPosition, position));

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/storage/EntityTracker.java

@@ -14,6 +14,9 @@ import java.util.concurrent.ConcurrentHashMap;
 public class EntityTracker extends StoredObject implements ExternalJoinGameListener {
     private final Map<Integer, Entity1_14Types.EntityType> clientEntityTypes = new ConcurrentHashMap<>();
     private final Map<Integer, Byte> insentientData = new ConcurrentHashMap<>();
+    // 0x1 = sleeping, 0x2 = riptide
+    private final Map<Integer, Byte> sleepingAndRiptideData = new ConcurrentHashMap<>();
+    private final Map<Integer, Byte> playerEntityFlags = new ConcurrentHashMap<>();
     @Getter
     @Setter
     private int latestTradeWindowId;
@@ -31,6 +34,8 @@ public class EntityTracker extends StoredObject implements ExternalJoinGameListe
     public void removeEntity(int entityId) {
         clientEntityTypes.remove(entityId);
         insentientData.remove(entityId);
+        sleepingAndRiptideData.remove(entityId);
+        playerEntityFlags.remove(entityId);
     }
 
     public void addEntity(int entityId, Entity1_14Types.EntityType type) {
@@ -46,6 +51,37 @@ public class EntityTracker extends StoredObject implements ExternalJoinGameListe
         insentientData.put(entity, value);
     }
 
+    private static byte zeroIfNull(Byte val) {
+        if (val == null) return 0;
+        return val;
+    }
+
+    public boolean isSleeping(int player) {
+        return (zeroIfNull(sleepingAndRiptideData.get(player)) & 1) != 0;
+    }
+
+    public void setSleeping(int player, boolean value) {
+        byte newValue = (byte) ((zeroIfNull(sleepingAndRiptideData.get(player)) & ~1) | (value ? 1 : 0));
+        if (newValue == 0) {
+            sleepingAndRiptideData.remove(player);
+        } else {
+            sleepingAndRiptideData.put(player, newValue);
+        }
+    }
+
+    public boolean isRiptide(int player) {
+        return (zeroIfNull(sleepingAndRiptideData.get(player)) & 2) != 0;
+    }
+
+    public void setRiptide(int player, boolean value) {
+        byte newValue = (byte) ((zeroIfNull(sleepingAndRiptideData.get(player)) & ~2) | (value ? 2 : 0));
+        if (newValue == 0) {
+            sleepingAndRiptideData.remove(player);
+        } else {
+            sleepingAndRiptideData.put(player, newValue);
+        }
+    }
+
     public boolean has(int entityId) {
         return clientEntityTypes.containsKey(entityId);
     }
@@ -58,4 +94,12 @@ public class EntityTracker extends StoredObject implements ExternalJoinGameListe
     public void onExternalJoinGame(int playerEntityId) {
         clientEntityTypes.put(playerEntityId, Entity1_14Types.EntityType.PLAYER);
     }
+
+    public byte getEntityFlags(int player) {
+        return zeroIfNull(playerEntityFlags.get(player));
+    }
+
+    public void setEntityFlags(int player, byte data) {
+        playerEntityFlags.put(player, data);
+    }
 }