On Sun, 20 Aug 2000 11:08:18 -0500, Chris Huff wrote:
>I don't think you can easily extract from a matrix which also stores 
>translations, scaling, and arbitrary matrix transforms. Just make the 
>matrix available, the user can override the rotate() methods to save 
>each rotation in a vector if they want.

You might be surprised.  Except for the arbitrary transforms (which make
the problem different, but possibly not much more difficult) it's relatively 
easy to decompose a matrix into rotations, scales, and translates.  I wrote
the whole mess up for someone in c.g.r.r. a few years ago; I think I might
still have it in my outbox.

-- 
Ron Parker   http://www2.fwi.com/~parkerr/traces.html
My opinions.  Mine.  Not anyone else's.

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