From cph-axolotl@mail.u-net.com Sat Mar 27 07:10:32 1999 Received: from burdell.cc.gatech.edu (root@burdell.cc.gatech.edu [130.207.3.207]) by lennon.cc.gatech.edu (8.9.1/8.9.1) with ESMTP id HAA10789 for ; Sat, 27 Mar 1999 07:10:25 -0500 (EST) Received: from asbestos.hitl.washington.edu (hitl-new.hitl.washington.edu [128.95.73.60]) by burdell.cc.gatech.edu (8.9.1/8.9.1) with ESMTP id HAA26210; Sat, 27 Mar 1999 07:10:17 -0500 (EST) Received: from mserv1c.u-net.net (mserv1c.u-net.net [195.102.240.33]) by asbestos.hitl.washington.edu (8.8.8/8.6.12) with ESMTP id MAA21529 for <3d-ui@hitl.washington.edu>; Sat, 27 Mar 1999 12:07:09 GMT Received: from [195.102.197.109] (helo=cph.dcs.napier.ac.uk) by mserv1c.u-net.net with smtp (Exim 2.10 #34) id 10QrrD-0002Ly-00 for 3d-ui@hitl.washington.edu; Sat, 27 Mar 1999 12:06:31 +0000 From: "Chris Hand" To: 3d-ui@hitl.washington.edu (g 3D user interfaces) Date: Sat, 27 Mar 1999 12:04:29 +0000 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Re: On the virtual trackball Reply-to: cph@bcs.org.uk Priority: normal In-reply-to: <19990327022716Z13724-23109+275@scapa.cs.ualberta.ca> Message-Id: Status: RO On 26 Mar 99 at 19:27, watsonb@cs.ualberta.ca wrote: > Anyone out there have source code for the > virtual spaceball, the object-centered, mouse-based > rotation interface designed by Chen et al? You mean the virtual _track_ball I presume.... one of Chen's papers includes all the maths to be able to work it out, and one of the Graphics Gems books (I, II or III) includes a description too, IIRC. Chris -- Chris Hand cph@bcs.org.uk http://www.dcs.napier.ac.uk/~cph/ cph@dcs.napier.ac.uk Edinburgh, Scotland ICQ: 16674813