[Bf-funboard] Eular rotation vs Quarternion rotation

[Martin Poirier]

--- Janek Kozicki <janek_listy at wp.pl> wrote:

> Stefan Andersson said:     (by the date of Tue, 22
> Jan 2008 00:19:33 +0100)
> 
> > So where does this leave us? will we forever have
> those horrible quats
> > curves when we animate our armature or is someone
> willing to
> > investigate on how to make thousands of animators
> happy? :)
> > 
> > And while we (with this I mean "I") are discussion
> curves, would it be
> > possible to have multiple objects viewable in the
> IPO window? Editing
> > lot's of objects at the same time would also be
> very useful feature.
> 
> Hi,
> 
> You can implement euler <-> quaternion conversion
> for
> the "editing only" purpose using equations on page
> 148 from this .pdf:
> 
>  
>
http://janek.kozicki.pl/phdthesis/kozicki_2007_PhD.pdf
> 
> I implemented all those equations in my code and it
> all works
> really good.

On page 148 is the axis - angle representation that I
was suggesting earlier.

What they're looking for is more along what you have
on page 150 (C.5.3).

As noted, arctan and arcsin are problematic.

Thanks a lot for the document though, that appendix is
really detailed.

Martin 


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ