How to allow only X axis rotation of 3D model? (SceneKit)
<p>I've  an app that should show a 3D model, at this point all is OK, but this model rotates in all 3D space axis and I need that this model rotate only on X axis (left/right) when user tries rotate the model. </p>

<p>Any idea? I've been stuck here for a while... </p>