Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!bu-cs!purdue!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!cernvax!ethz!ceb From: ceb@ethz.UUCP (Charles Buckley) Newsgroups: comp.graphics Subject: Re: 3D Rotations/Instancing Message-ID: <769@ethz.UUCP> Date: 2 Feb 89 14:36:03 GMT References: <65@sdcc10.ucsd.EDU> <3390@cloud9.Stratus.COM> <3391@cloud9.Stratus.COM> <25633@sgi.SGI.COM> Organization: ETH Zuerich Lines: 9 In-reply-to: gavin@krypton.SGI.COM's message of 27 Jan 89 02:11:01 GMT In article <25633@sgi.SGI.COM> gavin@krypton.SGI.COM (Gavin Bell) writes: Here's another way of keeping error out of your rotation matrices: and store rotations as 'Euler paramaters'. If you really want me to, I could dig up the reference to Euler How about Kane and Likins, Spacecraft Dynamics, published in the early 80's? Readable, informative, all that.