Laurent wrote:
> It seems as though the application of quaternions has come-and-gone over the 
> years.

In the video game programming book I'm reading, the author says something 
along the lines that quaternions are(*) a rotation about an arbitrary 
vector. They're nothing magical. They're just a vector and a float, 
representing a rotation around a specific axis. That said, the math behind 
the quaternions are magical.



(*) Of course, he's speaking of quaternions as implemented in the software 
library he's describing. I don't know how general this usage is.

-- 
Darren New, San Diego CA, USA (PST)
   Linux: Now bringing the quality and usability of
   open source desktop apps to your personal electronics.

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