[jacobolus]

If your game engine is using quaternions as a canonical internal representation for rotations, it is already following my advice from above.

(Game engine developers are smart people and have lots of practical experience with the benefits of avoiding angle measures, as do developers of computer vision, computer graphics, robotics, physical simulations, aerospace flight control, GIS, etc. etc. tools.)

[uup]

Yea, I see. I originally interpreted your comment as being about game developers, but you were actually talking about game engine developers. In which case, we agree :)