From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MrHua269 <wangxyper@163.com>
Date: Sun, 12 Jan 2025 10:53:41 +0800
Subject: [PATCH] Teleport async if entity was moving to another region at once

On folia, entity usually cannot move out of the tickregion, but sometimes it actually does(like some end pearl gun that can shoot an end pearl to the block faraway than 10000 blocks even more). To fix this, we added a temporary fix which teleport these entities to the destination instead running its move logics so that we could ensure anything is under control.But one thing need to consider is that teleportAsync is actually calling halfway of the entity tick and there is still something running when teleportAsync called, which is actually modified the entity in another thread, so there is still need an improvement

diff --git a/net/minecraft/world/entity/Entity.java b/net/minecraft/world/entity/Entity.java
index 43d0ad699a02a5156fe958f709c941a7cab6daa3..990ea0359c9015f867dc529a284148cd4846f5e8 100644
--- a/net/minecraft/world/entity/Entity.java
+++ b/net/minecraft/world/entity/Entity.java
@@ -1110,6 +1110,10 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
 
     private boolean boundingBoxChanged = false; // Gale - VMP - skip entity move if movement is zero
 
+    //Luminol start - Fix large pos moving
+    private volatile boolean preventMoving = false;
+    //Luminol end
+
     public void move(MoverType type, Vec3 movement) {
         // Gale start - VMP - skip entity move if movement is zero
         if (!this.boundingBoxChanged && movement.equals(Vec3.ZERO)) {
@@ -1125,6 +1129,32 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
             this.moveStartZ = this.getZ();
             this.moveVector = movement;
         }
+        //Luminol start - Fix high position moving
+        if (me.earthme.luminol.config.modules.fixes.FoliaEntityMovingFixConfig.enabled && ca.spottedleaf.moonrise.common.util.TickThread.isTickThread()){ //Except the threads because it may be called by the chunk system worker thread
+            var finalPosition = movement.add(this.position);
+            if (this.preventMoving || Double.isNaN(finalPosition.x) || Double.isNaN(finalPosition.y) || Double.isNaN(finalPosition.z)){
+                return;
+            }
+
+            if (!ca.spottedleaf.moonrise.common.util.TickThread.isTickThreadFor(((ServerLevel) this.level),finalPosition)){
+                this.preventMoving = true;
+                this.teleportAsync(
+                        (ServerLevel) this.level(),
+                        finalPosition,
+                        this.getYRot(), this.getXRot(),
+                        null, org.bukkit.event.player.PlayerTeleportEvent.TeleportCause.UNKNOWN,
+                        Entity.TELEPORT_FLAG_LOAD_CHUNK | Entity.TELEPORT_FLAG_TELEPORT_PASSENGERS,
+                        result -> {
+                            this.preventMoving = false;
+                        }
+                );
+                if (me.earthme.luminol.config.modules.fixes.FoliaEntityMovingFixConfig.warnOnDetected){
+                    MinecraftServer.LOGGER.warn("Entity {} with entityId {} has tried moving to another region!",this.type.getCategory().getName(),this.getId());
+                }
+                return;
+            }
+        }
+        //Luminol end
         try {
         // Paper end - detailed watchdog information
         if (this.noPhysics) {