Re: quaternians, tracking, 3 dimensions

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Article #2927

#2927

From: Joseph Francis
Date: Wed, 15 Apr 1992 17:48

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In article <1992Apr14.173000.23478@pasteur.Berkeley.EDU> luzeaux@liszt.berkeley.edu (Dominique Luzeaux) writes:
>In article <1992Apr13.161433.25003@ircam.fr>, francis@ircam.fr (Joseph
>Francis) writes:
>|> I believe quaternions are rational extensions into threespace of
>|> imaginary numbers, you get from "x + iy" to "x + iy + jz" (or I guess
>|> for EE's, it would be "x + jy" and "x + jy + kz") where i,j have
...
>As wrote berrier@sweetpea.jsc.nasa.gov (K. Berrier 283-4125) in a previous
>article, a quaternion can be seen as a transformation matrix consisting of
>a scalar and a vector, where the scalar is the angle of rotation about
>the axis represented by the vector.

Duuuhh. The light goes on over my head. TX.



-- 
| Le Jojo: Fresh 'n' Clean, speaking out to the way you want to live
| today; American - All American; doing, a bit so, and even more so.

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Message-ID: <1992Apr15.174829.1340@ircam.fr>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!corton!ircam!francis

References: <1992Apr9.174048.11924@aio.jsc.nasa.gov> <1992Apr13.161433.25003@ircam.fr> <1992Apr14.173000.23478@pasteur.Berkeley.EDU>

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!corton!ircam!francis
From: francis@ircam.fr (Joseph Francis)
Newsgroups: sci.electronics,comp.dsp,sci.engr.biomed,sci.math
Subject: Re: quaternians, tracking, 3 dimensions
Message-ID: <1992Apr15.174829.1340@ircam.fr>
Date: 15 Apr 92 17:48:29 GMT
References: <1992Apr9.174048.11924@aio.jsc.nasa.gov> <1992Apr13.161433.25003@ircam.fr> <1992Apr14.173000.23478@pasteur.Berkeley.EDU>
Organization: IRCAM, Paris (France)
Lines: 19

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