Hi again, I tested the code but I'm afraid it has the wrong result. In your example it is rotating in Object Space. This is why I'm using the SCNNode and worldTransform and simdWorldOrientation. To be clear, I'm using SceneKit because it is doing some "World Space" magic :-) and I would like to do that myself.
• [World Space.](https://www. dropbox. com/s/q5t12xpk7xjk7qk/WorldSpace.mov?dl=0)
• [Object Space.](https://www. dropbox. com/s/uicf149bdqt6yb1/ObjectSpace.mov?dl=0)