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From: ph@miro.Berkeley.EDU (Paul Heckbert)
Newsgroups: comp.graphics
Subject: Re: Rotation Matries
Message-ID: <26395@pasteur.Berkeley.EDU>
Date: 21 Jul 90 04:27:34 GMT
References: <40050@mips.mips.COM> <1172@idunno.Princeton.EDU>
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Reply-To: ph@miro.Berkeley.EDU (Paul Heckbert)
Organization: University of California at Berkeley
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David Koblas (koblas@mips.COM)
> Given an arbitrary rotation matrix M, what combonation of three
> rotation matries can generate M.  i.e
>	Ry Rx Rz = M

If you want code, check out Ned Greene's contribution to the book
"Graphics Gems", that is coming out in August.  Ned has an article in
the book on extraction of rotation, translation, and scaling parameters
from arbitrary 4x4 matrices.

You can see the book at the Academic Press booth at SIGGRAPH.  This
book is a collection of about 100 "gems" (short articles) of computer
graphics lore contributed by about 50 authors from around the country
and around the world.  It was edited by Andrew Glassner.  It looks like
the book will contain some very useful information for graphics programmers,
including a large appendix of C code.

I was one of the contributors to the book, however, so my opinions are
somewhat biassed.

Paul Heckbert, Computer Science Dept.
Evans Hall, UC Berkeley			INTERNET: ph@miro.berkeley.edu
Berkeley, CA 94720			UUCP: ucbvax!miro.berkeley.edu!ph