[Bf-committers] Quaternion interpolation is bumpy/wrong

[Bassam Kurdali]

Rotations in 3D are just a horrible beast, and I think it is non trivial
to figure out what constitutes a 'nice' interpolation across all cases,
perhaps not even possible. You might be to use hierachies to isolate
axis for some very specific setups, however:
> >> way how it could be correctly implemented. My attempt would be to remove
> >> the possibility to edit f-curves for quaternions (who does that anyway?)
Lots and lots of animators edit quat f-curves- and wouldn't like 'taking
the curve editor away' unless it is replaced with something better...
(curve editor++ ? direct editing of paths/handles in the 3D view?)
> >> and to use another interpolation scheme for this kind of rotations.
> >>
euler will have it's own, worse interpolation issues, but I'm not sure
how axis angle would behave in this specific case. Does anyone actually
use axis-angle and it's just me living in the stone age?