From 3fdcd0861f45bda4639ff41d148e8a8a5ee9ae91 Mon Sep 17 00:00:00 2001
From: hoshiryu <florian.canezin@irit.fr>
Date: Mon, 27 Apr 2020 18:35:53 +0200
Subject: [PATCH] Fix fbx rotation ;

---
 code/AssetLib/FBX/FBXConverter.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/code/AssetLib/FBX/FBXConverter.cpp b/code/AssetLib/FBX/FBXConverter.cpp
index 1bf977189..cf50c715b 100644
--- a/code/AssetLib/FBX/FBXConverter.cpp
+++ b/code/AssetLib/FBX/FBXConverter.cpp
@@ -3315,6 +3315,7 @@ void FBXConverter::InterpolateKeys(aiQuatKey *valOut, const KeyTimeList &keys, c
         // http://www.3dkingdoms.com/weekly/weekly.php?a=36
         if (quat.x * lastq.x + quat.y * lastq.y + quat.z * lastq.z + quat.w * lastq.w < 0) {
             quat.Conjugate();
+            quat.w = -quat.w;
         }
         lastq = quat;