> 3 - I haven't implemented the setByMatrix function, because I don't need
> it. But this should be done.
> Regards, Moji the Great

 Has this been implemented yet?

> But I was wondering if it would be better as an extention to
> TrackBallManipulator? The spherical mode is really just a set of constraints
> to the regular trackball which you might want to turn on and off. For a CAD
> app being able to lock and free individual rotation axes is certainly
> useful.
> Martin

Another difference is the TrackBallManipulator rotates around the origin
while SphericalManipulator should rotate around the centre of the screen.

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