From e1d1157f87cb96925be9727f635461973c8fbe57 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Tue, 7 Dec 2021 20:20:39 -0500
Subject: [PATCH] Core/GameObjects: Validate rotation quaternion at startup

Port From (https://github.com/TrinityCore/TrinityCore/commit/9005bdc684eb37718371f921bd570692375a6c7a)
---
 Source/Game/Globals/ObjectManager.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Source/Game/Globals/ObjectManager.cs b/Source/Game/Globals/ObjectManager.cs
index d30a9830e..13eef2715 100644
--- a/Source/Game/Globals/ObjectManager.cs
+++ b/Source/Game/Globals/ObjectManager.cs
@@ -4214,6 +4214,12 @@ namespace Game
                     continue;
                 }
 
+                if (!(Math.Abs(Quaternion.Dot(data.rotation, data.rotation) - 1) < 1e-5))
+                {
+                    Log.outError(LogFilter.Sql, $"Table `gameobject` has gameobject (GUID: {guid} Entry: {data.Id}) with invalid rotation quaternion (non-unit), defaulting to orientation on Z axis only");
+                    data.rotation = Quaternion.CreateFromRotationMatrix(Extensions.fromEulerAnglesZYX(data.spawnPoint.GetOrientation(), 0f, 0f));
+                }
+
                 if (WorldConfig.GetBoolValue(WorldCfg.CalculateGameobjectZoneAreaData))
                 {
                     PhasingHandler.InitDbVisibleMapId(phaseShift, data.terrainSwapMap);