Dimension switching cleanup (#1694)

* Dimension switching cleanup

Cleans up dimension switching logic that should no longer be needed. Also fixes above Nether Bedrock building dimension switching.

* Clear thunder on dimension switch too

* Clarify fake dimension switch function name

* Javadoc that

connector/src/main/java/org/geysermc/connector/network/session/GeyserSession.java

@@ -37,7 +37,6 @@ import com.github.steveice10.mc.protocol.data.game.window.VillagerTrade;
 import com.github.steveice10.mc.protocol.packet.handshake.client.HandshakePacket;
 import com.github.steveice10.mc.protocol.packet.ingame.client.player.ClientPlayerPositionRotationPacket;
 import com.github.steveice10.mc.protocol.packet.ingame.client.world.ClientTeleportConfirmPacket;
-import com.github.steveice10.mc.protocol.packet.ingame.server.ServerRespawnPacket;
 import com.github.steveice10.mc.protocol.packet.login.server.LoginSuccessPacket;
 import com.github.steveice10.packetlib.BuiltinFlags;
 import com.github.steveice10.packetlib.Client;
@@ -95,7 +94,6 @@ import java.security.spec.InvalidKeySpecException;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ScheduledFuture;
-import java.util.concurrent.atomic.AtomicInteger;
 
 @Getter
 public class GeyserSession implements CommandSender {
@@ -148,7 +146,11 @@ public class GeyserSession implements CommandSender {
     @Setter
     private GameMode gameMode = GameMode.SURVIVAL;
 
-    private final AtomicInteger pendingDimSwitches = new AtomicInteger(0);
+    /**
+     * Keeps track of the world name for respawning.
+     */
+    @Setter
+    private String worldName = null;
 
     private boolean sneaking;
 
@@ -185,9 +187,6 @@ public class GeyserSession implements CommandSender {
     @Setter
     private Vector3i lastInteractionPosition = Vector3i.ZERO;
 
-    private boolean manyDimPackets = false;
-    private ServerRespawnPacket lastDimPacket = null;
-
     @Setter
     private Entity ridingVehicleEntity;
 
@@ -537,16 +536,6 @@ public class GeyserSession implements CommandSender {
                     @Override
                     public void packetReceived(PacketReceivedEvent event) {
                         if (!closed) {
-                            //handle consecutive respawn packets
-                            if (event.getPacket().getClass().equals(ServerRespawnPacket.class)) {
-                                manyDimPackets = lastDimPacket != null;
-                                lastDimPacket = event.getPacket();
-                                return;
-                            } else if (lastDimPacket != null) {
-                                PacketTranslatorRegistry.JAVA_TRANSLATOR.translate(lastDimPacket.getClass(), lastDimPacket, GeyserSession.this);
-                                lastDimPacket = null;
-                            }
-
                             // Required, or else Floodgate players break with Bukkit chunk caching
                             if (event.getPacket() instanceof LoginSuccessPacket) {
                                 GameProfile profile = ((LoginSuccessPacket) event.getPacket()).getProfile();

connector/src/main/java/org/geysermc/connector/network/translators/bedrock/entity/player/BedrockActionTranslator.java

@@ -43,7 +43,6 @@ import org.geysermc.connector.entity.Entity;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.network.translators.PacketTranslator;
 import org.geysermc.connector.network.translators.Translator;
-import org.geysermc.connector.network.translators.collision.CollisionManager;
 import org.geysermc.connector.network.translators.world.block.BlockTranslator;
 import org.geysermc.connector.utils.BlockUtils;
 
@@ -157,14 +156,12 @@ public class BedrockActionTranslator extends PacketTranslator<PlayerActionPacket
                 // Handled in BedrockInventoryTransactionTranslator
                 break;
             case DIMENSION_CHANGE_SUCCESS:
-                if (session.getPendingDimSwitches().decrementAndGet() == 0) {
                 //sometimes the client doesn't feel like loading
                 PlayStatusPacket spawnPacket = new PlayStatusPacket();
                 spawnPacket.setStatus(PlayStatusPacket.Status.PLAYER_SPAWN);
                 session.sendUpstreamPacket(spawnPacket);
                 entity.updateBedrockAttributes(session);
                 session.getEntityCache().updateBossBars();
-                }
                 break;
             case JUMP:
                 session.setJumping(true);

connector/src/main/java/org/geysermc/connector/network/translators/bedrock/entity/player/BedrockMovePlayerTranslator.java

@@ -50,7 +50,7 @@ public class BedrockMovePlayerTranslator extends PacketTranslator<MovePlayerPack
     @Override
     public void translate(MovePlayerPacket packet, GeyserSession session) {
         PlayerEntity entity = session.getPlayerEntity();
-        if (!session.isSpawned() || session.getPendingDimSwitches().get() > 0) return;
+        if (!session.isSpawned()) return;
 
         if (!session.getUpstream().isInitialized()) {
             MoveEntityAbsolutePacket moveEntityBack = new MoveEntityAbsolutePacket();

connector/src/main/java/org/geysermc/connector/network/translators/java/JavaJoinGameTranslator.java

@@ -55,12 +55,12 @@ public class JavaJoinGameTranslator extends PacketTranslator<ServerJoinGamePacke
         // are swapping servers
         String newDimension = DimensionUtils.getNewDimension(packet.getDimension());
         if (session.isSpawned()) {
-            String fakeDim = session.getDimension().equals(DimensionUtils.OVERWORLD) ? DimensionUtils.NETHER : DimensionUtils.OVERWORLD;
+            String fakeDim = DimensionUtils.getTemporaryDimension(session.getDimension(), newDimension);
             DimensionUtils.switchDimension(session, fakeDim);
-            DimensionUtils.switchDimension(session, newDimension);
 
             session.getWorldCache().removeScoreboard();
         }
+        session.setWorldName(packet.getWorldName());
 
         AdventureSettingsPacket bedrockPacket = new AdventureSettingsPacket();
         bedrockPacket.setUniqueEntityId(session.getPlayerEntity().getGeyserId());

connector/src/main/java/org/geysermc/connector/network/translators/java/JavaRespawnTranslator.java

@@ -43,8 +43,6 @@ public class JavaRespawnTranslator extends PacketTranslator<ServerRespawnPacket>
     @Override
     public void translate(ServerRespawnPacket packet, GeyserSession session) {
         Entity entity = session.getPlayerEntity();
-        if (entity == null)
-            return;
 
         float maxHealth = entity.getAttributes().containsKey(AttributeType.MAX_HEALTH) ? entity.getAttributes().get(AttributeType.MAX_HEALTH).getValue() : 20f;
         // Max health must be divisible by two in bedrock
@@ -66,18 +64,24 @@ public class JavaRespawnTranslator extends PacketTranslator<ServerRespawnPacket>
             session.setRaining(false);
         }
 
-        String newDimension = DimensionUtils.getNewDimension(packet.getDimension());
+        if (session.isThunder()) {
-        if (!session.getDimension().equals(newDimension)) {
+            LevelEventPacket stopThunderPacket = new LevelEventPacket();
-            DimensionUtils.switchDimension(session, newDimension);
+            stopThunderPacket.setType(LevelEventType.STOP_THUNDERSTORM);
-        } else {
+            stopThunderPacket.setData(0);
-            if (session.isManyDimPackets()) { //reloading world
+            stopThunderPacket.setPosition(Vector3f.ZERO);
-                String fakeDim = session.getDimension().equals(DimensionUtils.OVERWORLD) ? DimensionUtils.NETHER : DimensionUtils.OVERWORLD;
+            session.sendUpstreamPacket(stopThunderPacket);
-                DimensionUtils.switchDimension(session, fakeDim);
+            session.setThunder(false);
-                DimensionUtils.switchDimension(session, newDimension);
-            } else {
-                // Handled in JavaPlayerPositionRotationTranslator
-                session.setSpawned(false);
         }
+
+        String newDimension = DimensionUtils.getNewDimension(packet.getDimension());
+        if (!session.getDimension().equals(newDimension) || !packet.getWorldName().equals(session.getWorldName())) {
+            if (!packet.getWorldName().equals(session.getWorldName()) && session.getDimension().equals(newDimension)) {
+                // Switching to a new world (based off the world name change); send a fake dimension change
+                String fakeDim = DimensionUtils.getTemporaryDimension(session.getDimension(), newDimension);
+                DimensionUtils.switchDimension(session, fakeDim);
+            }
+            session.setWorldName(packet.getWorldName());
+            DimensionUtils.switchDimension(session, newDimension);
         }
     }
 }

connector/src/main/java/org/geysermc/connector/network/translators/java/entity/player/JavaPlayerPositionRotationTranslator.java

@@ -46,13 +46,11 @@ public class JavaPlayerPositionRotationTranslator extends PacketTranslator<Serve
 
     @Override
     public void translate(ServerPlayerPositionRotationPacket packet, GeyserSession session) {
-        PlayerEntity entity = session.getPlayerEntity();
-        if (entity == null)
-            return;
-
         if (!session.isLoggedIn())
             return;
 
+        PlayerEntity entity = session.getPlayerEntity();
+
         if (!session.isSpawned()) {
             Vector3f pos = Vector3f.from(packet.getX(), packet.getY(), packet.getZ());
             entity.setPosition(pos);

connector/src/main/java/org/geysermc/connector/utils/DimensionUtils.java

@@ -57,8 +57,6 @@ public class DimensionUtils {
     public static void switchDimension(GeyserSession session, String javaDimension) {
         int bedrockDimension = javaToBedrock(javaDimension);
         Entity player = session.getPlayerEntity();
-        if (javaDimension.equals(session.getDimension()))
-            return;
 
         if (session.getMovementSendIfIdle() != null) {
             session.getMovementSendIfIdle().cancel(true);
@@ -67,9 +65,6 @@ public class DimensionUtils {
         session.getEntityCache().removeAllEntities();
         session.getItemFrameCache().clear();
         session.getSkullCache().clear();
-        if (session.getPendingDimSwitches().getAndIncrement() > 0) {
-            ChunkUtils.sendEmptyChunks(session, player.getPosition().toInt(), 3, true);
-        }
 
         Vector3i pos = Vector3i.from(0, Short.MAX_VALUE, 0);
 
@@ -150,4 +145,20 @@ public class DimensionUtils {
         // Change dimension ID to the End to allow for building above Bedrock
         BEDROCK_NETHER_ID = isAboveNetherBedrockBuilding ? 2 : 1;
     }
+
+    /**
+     * Gets the fake, temporary dimension we send clients to so we aren't switching to the same dimension without an additional
+     * dimension switch.
+     *
+     * @param currentDimension the current dimension of the player
+     * @param newDimension the new dimension that the player will be transferred to
+     * @return the fake dimension to transfer to
+     */
+    public static String getTemporaryDimension(String currentDimension, String newDimension) {
+        if (BEDROCK_NETHER_ID == 2) {
+            // Prevents rare instances of Bedrock locking up
+            return javaToBedrock(newDimension) == 2 ? OVERWORLD : NETHER;
+        }
+        return currentDimension.equals(OVERWORLD) ? NETHER : OVERWORLD;
+    }
 }