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[Bug 15960] Use euler angles or quaternions to decompose matrices

From: <bugzilla@jessica.w3.org>
Date: Tue, 14 Feb 2012 18:56:01 +0000
To: public-css-bugzilla@w3.org
Message-Id: <E1RxNXl-0000TX-P5@jessica.w3.org>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=15960

Dirk Schulze <dschulze@adobe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Notation of decomposing     |Use euler angles or
                   |code unspecified            |quaternions to decompose
                   |                            |matrices

--- Comment #1 from Dirk Schulze <dschulze@adobe.com> 2012-02-14 18:56:00 UTC ---
The pseudo code in the spec uses euler angles for getting the rotation.
Implementations seem to use quaternions to work around singularities with
euler. Should we follow implementations? Should animations and transitions get
updated as well?

See discussions:

http://lists.w3.org/Archives/Public/www-style/2011Aug/0652.html 
http://lists.w3.org/Archives/Public/www-style/2011Aug/0653.html
http://lists.w3.org/Archives/Public/www-style/2011Aug/0665.html

and

http://lists.w3.org/Archives/Public/www-style/2012Feb/0575.html

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