Pufferfish does have it but I did it the hard way - before I knew about the rhinocommon quaternions 
(I coded what a quaternion does behind the scenes ala a reference from Daniel Piker, not actually using rhinocommon quaternions). @Dani_Abalde has the cleanest code for the rotation I’ve seen using the Rhinocommon quaternions - we compared with Pufferfish vs his Plane interpolation in Peacock and results are the same. Maybe he will be nice enough to share with you 
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