[Bf-committers] Animation regression, quaternion normalization

[Brecht Van Lommel]

Hi Nathan,

I tried manually typing in non-normalized values in the N key
transform panel in the 3d view, and rotating objects/bones after that
with transform, but could not see it auto-normalize the values in any
version I tested (2.49, 2.57, 2.60, 2.62).

Probably I'm misunderstanding something, but I can't find any traces
of this feature.

Brecht.

On Thu, Feb 23, 2012 at 11:03 PM, Nathan Vegdahl <cessen at cessen.com> wrote:
> Hi guys, I wrote to the list about this before but received no response.
>
> I don't know when this was changed, but quaternion rotations for
> objects and bones in Blender are no longer auto-normalized for the
> user.  I am frustrated that a release (2.62) made it out the door with
> this being the case, as it substantially harms the practicality of
> animating with quaternions.  It is not "incorrect" behavior per se, so
> I am hesitant to file a bug report.  But it is something that needs to
> be changed.
>
> I think we either need to revert behavior back to how it was before
> (quaternions being auto-normalized in the transform panel), or find
> another solution.  But as things are right now, quaternions are
> impractical to animate with in many circumstances (especially doing
> blocking on characters involving large rotations).  I will be happy to
> provide a technical explanation of why that is the case, but at the
> moment I am swamped trying to finish my rigging DVD.
>
> I just want to make sure this doesn't slip into the next release as
> well!  It is a serious regression.
>
> --Nathan
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