Handle ClientboundTickingStatePacket correctly and fix Throwable Scales

core/src/main/java/org/geysermc/geyser/entity/EntityDefinitions.java

@@ -93,7 +93,7 @@ public final class EntityDefinitions {
     public static final EntityDefinition<EvokerFangsEntity> EVOKER_FANGS;
     public static final EntityDefinition<ThrowableItemEntity> EXPERIENCE_BOTTLE;
     public static final EntityDefinition<ExpOrbEntity> EXPERIENCE_ORB;
-    public static final EntityDefinition<Entity> EYE_OF_ENDER;
+    public static final EntityDefinition<EnderEyeEntity> EYE_OF_ENDER;
     public static final EntityDefinition<FallingBlockEntity> FALLING_BLOCK;
     public static final EntityDefinition<FireballEntity> FIREBALL;
     public static final EntityDefinition<FireworkEntity> FIREWORK_ROCKET;
@@ -250,7 +250,7 @@ public final class EntityDefinitions {
                     .height(0.8f).width(0.5f)
                     .identifier("minecraft:evocation_fang")
                     .build();
-            EYE_OF_ENDER = EntityDefinition.inherited(Entity::new, entityBase)
+            EYE_OF_ENDER = EntityDefinition.inherited(EnderEyeEntity::new, entityBase)
                     .type(EntityType.EYE_OF_ENDER)
                     .heightAndWidth(0.25f)
                     .identifier("minecraft:eye_of_ender_signal")

core/src/main/java/org/geysermc/geyser/entity/type/BoatEntity.java

@@ -187,7 +187,7 @@ public InteractionResult interact(Hand hand) {
     @Override
     public void tick() {
         // Java sends simply "true" and "false" (is_paddling_left), Bedrock keeps sending packets as you're rowing
-        doTick = !doTick; // Run every 100 ms
+        doTick = !doTick; // Run every other tick
         if (!doTick || passengers.isEmpty()) {
             return;
         }

core/src/main/java/org/geysermc/geyser/entity/type/EnderEyeEntity.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.entity.type;
+
+
+import org.cloudburstmc.math.vector.Vector3f;
+import org.cloudburstmc.protocol.bedrock.data.entity.EntityDataTypes;
+import org.geysermc.geyser.entity.EntityDefinition;
+import org.geysermc.geyser.entity.EntityDefinitions;
+import org.geysermc.geyser.session.GeyserSession;
+
+import java.util.UUID;
+
+public class EnderEyeEntity extends Entity {
+    public EnderEyeEntity(GeyserSession session, int entityId, long geyserId, UUID uuid, EntityDefinition<?> definition, Vector3f position, Vector3f motion, float yaw, float pitch, float headYaw) {
+        super(session, entityId, geyserId, uuid, definition, position, motion, yaw, pitch, headYaw);
+    }
+
+    @Override
+    protected void initializeMetadata() {
+        super.initializeMetadata();
+        // Correct sizing
+        dirtyMetadata.put(EntityDataTypes.SCALE, 0.5f);
+    }
+}

core/src/main/java/org/geysermc/geyser/entity/type/LivingEntity.java

@@ -423,3 +423,4 @@ protected AttributeData calculateAttribute(Attribute javaAttribute, GeyserAttrib
         return type.getAttribute((float) AttributeUtils.calculateValue(javaAttribute));
     }
 }
+

core/src/main/java/org/geysermc/geyser/entity/type/ThrowableItemEntity.java

@@ -25,12 +25,13 @@
 
 package org.geysermc.geyser.entity.type;
 
-import org.geysermc.mcprotocollib.protocol.data.game.entity.metadata.EntityMetadata;
-import org.geysermc.mcprotocollib.protocol.data.game.item.ItemStack;
 import org.cloudburstmc.math.vector.Vector3f;
+import org.cloudburstmc.protocol.bedrock.data.entity.EntityDataTypes;
 import org.cloudburstmc.protocol.bedrock.data.entity.EntityFlag;
 import org.geysermc.geyser.entity.EntityDefinition;
 import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.mcprotocollib.protocol.data.game.entity.metadata.EntityMetadata;
+import org.geysermc.mcprotocollib.protocol.data.game.item.ItemStack;
 
 import java.util.UUID;
 
@@ -39,7 +40,7 @@
  */
 public class ThrowableItemEntity extends ThrowableEntity {
     /**
-     * Number of ticks since the entity was spawned by the Java server
+     * Number of draw ticks since the entity was spawned by the Java server
      */
     private int age;
     private boolean invisible;
@@ -48,29 +49,37 @@ public ThrowableItemEntity(GeyserSession session, int entityId, long geyserId, U
         super(session, entityId, geyserId, uuid, definition, position, motion, yaw, pitch, headYaw);
         setFlag(EntityFlag.INVISIBLE, true);
         invisible = false;
+        age = 1;
+    }
+
+    @Override
+    protected void initializeMetadata() {
+        super.initializeMetadata();
+        // Correct sizing
+        dirtyMetadata.put(EntityDataTypes.SCALE, 0.5f);
     }
 
     private void checkVisibility() {
+        age++;
+
+        // Prevent projectiles from blocking the player's screen
+        if (session.isTickingFrozen()) {
+            Vector3f playerPos = session.getPlayerEntity().getPosition().sub(0, session.getPlayerEntity().getDefinition().offset(), 0);
+            setInvisible(playerPos.distanceSquared(position.add(0, definition.offset(), 0)) < 12.25);
+        } else {
+            setInvisible(age <= 2);
+        }
+
         if (invisible != getFlag(EntityFlag.INVISIBLE)) {
-            if (!invisible) {
-                Vector3f playerPos = session.getPlayerEntity().getPosition();
-                // Prevent projectiles from blocking the player's screen
-                if (age >= 4 || position.distanceSquared(playerPos) > 16) {
-                    setFlag(EntityFlag.INVISIBLE, false);
-                    updateBedrockMetadata();
-                }
-            } else {
-                setFlag(EntityFlag.INVISIBLE, true);
-                updateBedrockMetadata();
-            }
+            setFlag(EntityFlag.INVISIBLE, invisible);
+            updateBedrockMetadata();
         }
-        age++;
     }
 
     @Override
-    public void tick() {
+    public void drawTick() {
         checkVisibility();
-        super.tick();
+        super.drawTick();
     }
 
     @Override

core/src/main/java/org/geysermc/geyser/entity/type/Tickable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -26,8 +26,21 @@
 package org.geysermc.geyser.entity.type;
 
 /**
- * Implemented onto anything that should have code ran every Minecraft tick - 50 milliseconds.
+ * Implemented onto anything that should have code ran every Minecraft tick.
+ * By default, the Java server runs at 20 TPS, 50 milliseconds for each tick.
  */
 public interface Tickable {
+    /**
+     * This function gets called every tick at all times, even when the server requests that
+     * the game should be frozen. This should be used for updating things that are always
+     * client side updated on Java, regardless of if the server is frozen or not.
+     */
+    default void drawTick() {
+    }
+
+    /**
+     * This function gets called every game tick as long as the
+     * game tick loop isn't frozen.
+     */
     void tick();
 }

core/src/main/java/org/geysermc/geyser/session/GeyserSession.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -170,6 +170,7 @@
 import org.geysermc.geyser.util.ChunkUtils;
 import org.geysermc.geyser.util.DimensionUtils;
 import org.geysermc.geyser.util.EntityUtils;
+import org.geysermc.geyser.util.MathUtils;
 import org.geysermc.geyser.util.LoginEncryptionUtils;
 import org.geysermc.geyser.util.MinecraftAuthLogger;
 import org.geysermc.mcprotocollib.auth.GameProfile;
@@ -596,7 +597,7 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
     private boolean advancedTooltips = false;
 
     /**
-     * The thread that will run every 50 milliseconds - one Minecraft tick.
+     * The thread that will run every game tick.
      */
     private ScheduledFuture<?> tickThread = null;
 
@@ -627,7 +628,7 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
     /**
      * Stores cookies sent by the Java server.
      */
-    @Setter @Getter
+    @Setter
     private Map<String, byte[]> cookies = new Object2ObjectOpenHashMap<>();
 
     private final GeyserCameraData cameraData;
@@ -636,6 +637,17 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
 
     private MinecraftProtocol protocol;
 
+    @Getter
+    private int nanosecondsPerTick = 50000000;
+    @Getter
+    private float millisecondsPerTick = 50.0f;
+    private boolean tickingFrozen = false;
+    /**
+     * The amount of ticks requested by the server that the game should proceed with, even if the game tick loop is frozen.
+     */
+    @Setter
+    private int stepTicks = 0;
+
     public GeyserSession(GeyserImpl geyser, BedrockServerSession bedrockServerSession, EventLoop eventLoop) {
         this.geyser = geyser;
         this.upstream = new UpstreamSession(bedrockServerSession);
@@ -858,31 +870,31 @@ public boolean onMicrosoftLoginComplete(PendingMicrosoftAuthentication.Authentic
         }
         task.cleanup(); // player is online -> remove pending authentication immediately
         return task.getAuthentication().handle((result, ex) -> {
-             if (ex != null) {
-                 geyser.getLogger().error("Failed to log in with Microsoft code!", ex);
-                 disconnect(ex.toString());
-                 return false;
-             }
+            if (ex != null) {
+                geyser.getLogger().error("Failed to log in with Microsoft code!", ex);
+                disconnect(ex.toString());
+                return false;
+            }
 
-             StepMCProfile.MCProfile mcProfile = result.session().getMcProfile();
-             StepMCToken.MCToken mcToken = mcProfile.getMcToken();
+            StepMCProfile.MCProfile mcProfile = result.session().getMcProfile();
+            StepMCToken.MCToken mcToken = mcProfile.getMcToken();
 
-             this.protocol = new MinecraftProtocol(
-                     new GameProfile(mcProfile.getId(), mcProfile.getName()),
-                     mcToken.getAccessToken()
-             );
+            this.protocol = new MinecraftProtocol(
+                    new GameProfile(mcProfile.getId(), mcProfile.getName()),
+                    mcToken.getAccessToken()
+            );
 
-             try {
-                 connectDownstream();
-             } catch (Throwable t) {
-                 t.printStackTrace();
-                 return false;
-             }
+            try {
+                connectDownstream();
+            } catch (Throwable t) {
+                t.printStackTrace();
+                return false;
+            }
 
-             // Save our auth chain for later use
-             geyser.saveAuthChain(bedrockUsername(), GSON.toJson(result.step().toJson(result.session())));
-             return true;
-         }).getNow(false);
+            // Save our auth chain for later use
+            geyser.saveAuthChain(bedrockUsername(), GSON.toJson(result.step().toJson(result.session())));
+            return true;
+        }).getNow(false);
     }
 
     /**
@@ -903,7 +915,7 @@ private void connectDownstream() {
         boolean floodgate = this.remoteServer.authType() == AuthType.FLOODGATE;
 
         // Start ticking
-        tickThread = eventLoop.scheduleAtFixedRate(this::tick, 50, 50, TimeUnit.MILLISECONDS);
+        tickThread = eventLoop.scheduleAtFixedRate(this::tick, nanosecondsPerTick, nanosecondsPerTick, TimeUnit.NANOSECONDS);
 
         this.protocol.setUseDefaultListeners(false);
 
@@ -1220,8 +1232,17 @@ public ScheduledFuture<?> scheduleInEventLoop(Runnable runnable, long duration,
         }, duration, timeUnit);
     }
 
+    public void updateTickingState(float tickRate, boolean frozen) {
+        tickThread.cancel(false);
+        this.tickingFrozen = frozen;
+        millisecondsPerTick = 1000.0f / tickRate;
+
+        nanosecondsPerTick = MathUtils.ceil(1000000000.0f / MathUtils.clamp(tickRate, 1.0f, 10000.0f));
+        tickThread = eventLoop.scheduleAtFixedRate(this::tick, nanosecondsPerTick, nanosecondsPerTick, TimeUnit.NANOSECONDS);
+    }
+
     /**
-     * Called every 50 milliseconds - one Minecraft tick.
+     * Called every Minecraft tick.
      */
     protected void tick() {
         try {
@@ -1259,9 +1280,15 @@ protected void tick() {
                 isInWorldBorderWarningArea = false;
             }
 
-
+            boolean gameShouldUpdate = !tickingFrozen || stepTicks > 0;
+            if (stepTicks > 0) {
+                --stepTicks;
+            }
             for (Tickable entity : entityCache.getTickableEntities()) {
-                entity.tick();
+                entity.drawTick();
+                if (gameShouldUpdate) {
+                    entity.tick();
+                }
             }
 
             if (armAnimationTicks >= 0) {
@@ -1790,7 +1817,7 @@ public void setDaylightCycle(boolean doCycle) {
      * Send a gamerule value to the client
      *
      * @param gameRule The gamerule to send
-     * @param value    The value of the gamerule
+     * @param value The value of the gamerule
      */
     public void sendGameRule(String gameRule, Object value) {
         GameRulesChangedPacket gameRulesChangedPacket = new GameRulesChangedPacket();
@@ -1991,7 +2018,7 @@ public float getEyeHeight() {
 
     @Override
     public UUID javaUuid() {
-        return playerEntity != null ? playerEntity.getUuid() : null ;
+        return playerEntity != null ? playerEntity.getUuid() : null;
     }
 
     @Override

core/src/main/java/org/geysermc/geyser/translator/protocol/bedrock/BedrockMobEquipmentTranslator.java

@@ -66,7 +66,7 @@ public void translate(GeyserSession session, MobEquipmentPacket packet) {
             // (No need to send a release item packet - Java doesn't do this when swapping items)
             // Required to do it a tick later or else it doesn't register
             session.scheduleInEventLoop(() -> session.useItem(Hand.MAIN_HAND),
-                    50, TimeUnit.MILLISECONDS);
+                    session.getNanosecondsPerTick(), TimeUnit.NANOSECONDS);
         }
 
         if (oldItem.getJavaId() != newItem.getJavaId()) {