Path: utzoo!attcan!uunet!mcsun!ukc!slxsys!dircon!uad1077 From: uad1077@dircon.uucp Newsgroups: comp.graphics Subject: Re: Re: the essence of Atkinson's regions patent Message-ID: <1990May24.184352.29786@dircon.uucp> Date: 24 May 90 18:43:52 GMT Sender: uad1077@dircon.uucp Reply-To: uad1077@dircon.uucp () Organization: The Direct Connection, UK Lines: 23 >> > without breaking the patent because the Toolbox uses regions internally. >> ....> Ahem. PostScript has regions. Cedar had regions. NeWS has regions. OpenWindows has regions. There were public domain implementations of regions in the last two years' SIGGRAPH course notes. The point about Atkinson's patent (from what I've seen go past in this discussion) is that he has the second most compact representation (after PostScript) for most cases. On the other hand, this may mean that his patent suffers from being the second slowest at the usual region operations. I think it's just that if you do write implement regions, there are more interesting (but possibly less lucrative!) things to do with it than reverse engineer a Mac. -- Ian D. Kemmish Tel. +44 767 601 361 18 Durham Close uad1077@dircon.UUCP Biggleswade ukc!dircon!uad1077 Beds SG18 8HZ United Kingdom