Shiroha/shiroha-server/minecraft-patches/features/0015-Fix-dragon-part-desync.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MrHua269 <mrhua269@gmail.com>
Date: Wed, 8 Jul 2026 21:23:24 +0800
Subject: [PATCH] Fix dragon part desync


diff --git a/ca/spottedleaf/moonrise/patches/chunk_system/level/entity/server/ServerEntityLookup.java b/ca/spottedleaf/moonrise/patches/chunk_system/level/entity/server/ServerEntityLookup.java
index b31b55f00e2ce1bd6c1011fe852bd1dbb37de524..772e07af051b0f88582434b4cfcba42a666ab7a0 100644
--- a/ca/spottedleaf/moonrise/patches/chunk_system/level/entity/server/ServerEntityLookup.java
+++ b/ca/spottedleaf/moonrise/patches/chunk_system/level/entity/server/ServerEntityLookup.java
@@ -97,6 +97,7 @@ public final class ServerEntityLookup extends EntityLookup {
         if (entity instanceof ThrownEnderpearl enderpearl) {
             this.addEnderPearl(CoordinateUtils.getChunkKey(enderpearl.chunkPosition()), enderpearl.getId()); // Folia - region threading
         }
+        if (entity instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon dragon) dragon.syncDragonPartsAfterTeleportTransform(); // Shiroha - Fix dragon part desync
         entity.registerScheduler(); // Paper - optimise Folia entity scheduler
     }
 
diff --git a/net/minecraft/world/entity/Entity.java b/net/minecraft/world/entity/Entity.java
index aa3ed23fbfd85117101e4ef15123b48d9673c5b0..fee93b64bc42cd49ea9ff007e2fbd7d4ef80d58b 100644
--- a/net/minecraft/world/entity/Entity.java
+++ b/net/minecraft/world/entity/Entity.java
@@ -4459,6 +4459,7 @@ public abstract class Entity
         Entity copy = this.getType().create(destination, EntitySpawnReason.DIMENSION_TRAVEL);
         copy.restoreFrom(this);
         copy.transform(pos, yaw, pitch, velocity);
+        if (copy instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon dragon) dragon.syncDragonPartsAfterTeleportTransform(); // Shiroha - Fix dragon part desync
         // vanilla code used to call remove _after_ copying, and some stuff is required to be after copy - so add hook here
         // for example, clearing of inventory after switching dimensions
         this.postRemoveAfterChangingDimensions();
diff --git a/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java b/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
index ab921ab4b4cc860abd77744f2bd201013e136e51..0ddf5ef000103b1ef88f3d3e232d734b2e198944 100644
--- a/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
+++ b/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
@@ -1011,4 +1011,12 @@ public class EnderDragon extends Mob implements Enemy {
         return 500;
     }
     // Paper end - init expToDrop for already dying spawned dragon
+
+    // Shiroha start - Fix dragon part desync
+    public void syncDragonPartsAfterTeleportTransform() {
+        for (EnderDragonPart part : this.subEntities) {
+            this.tickPart(part, 0.0, 0.0, 0.0); // offset -> 0.0
+        }
+    }
+    // Shiroha end
 }