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From: charles@cs.strath.ac.uk (Charles X. Chen)
Newsgroups: comp.graphics
Subject: Re: quaternions
Message-ID: <2505@baird.cs.strath.ac.uk>
Date: 9 Mar 90 09:55:09 GMT
References: <8513@chaph.usc.edu>
Sender: news@cs.strath.ac.uk
Reply-To: charles@cs.strath.ac.uk
Distribution: comp.graphics
Organization: Comp. Sci. Dept., Strathclyde Univ., Scotland.
Lines: 20

In article <8513@chaph.usc.edu> you write: 
>
> Would anyone out there enlight me what 'quaternion' entails in
> the area of computer graphics?
 
Quaternion is a very old mathematic concept. it has been used in computer 
animation for a while, mainly for doing interpolation calculations. 
Because each position of an object in the context can be expressed by
a quaternion, the interpolation between key-frames reduces to interpolating
between associated quaternions, linearly or spherically


Charles 


Charles X. Chen
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