Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!esosun!net1!sdcsvax!hp-sdd!ncr-sd!ncrcae!wingard From: wingard@ncrcae.UUCP (Steve Wingard) Newsgroups: comp.sys.amiga Subject: Re: Amiga news (genlock & lots more, *long* but juicy) Message-ID: <2351@ncrcae.UUCP> Date: Tue, 16-Dec-86 11:44:26 EST Article-I.D.: ncrcae.2351 Posted: Tue Dec 16 11:44:26 1986 Date-Received: Wed, 17-Dec-86 23:51:52 EST References: <1272@zen.BERKELEY.EDU> <627@hp-sdd.HP.COM> <1115@cbmvax.cbmvax.cbm.UUCP> Reply-To: wingard@ncrcae.UUCP (Steve Wingard) Organization: NCR Corp, E&M-Columbia, W Columbia, SC Lines: 43 In article <1115@cbmvax.cbmvax.cbm.UUCP> grr@cbmvax.UUCP (George Robbins) writes: >In article <627@hp-sdd.HP.COM> nick@hp-sdd.UUCP (Nick Flor) writes: >>In article <1272@zen.BERKELEY.EDU> hatcher@ingres.Berkeley.EDU.UUCP (Doug Merritt) writes: >>> >>>They also showed a *** 3-D ray-traced smooth-motion animation *** showing >>>a clown juggling 3 reflecting balls!!!!!! Extraordinary. The absolute best >>>by 2 orders of magnitude that anyone has yet seen on an Amiga. This >>>was done by one Eric Graham... >> >>But, did he cheat? Can you see the clown reflected in the balls? >>Was the clown rendered also? >>Nick > >Yes, the clown is reflected in the balls, yes, the balls are reflected in >each other, and yes, the shadows seem seem to apply all the correct places. >The perspective seems a bit warped, and poor clown has his elbows pinned to >the backdrop... > >Admittedly, the imagery is pretty simple compared to some of the other Amiga >ray tracing images, but it's still a pretty incredible business card!!! > >The amimation uses a small set of images (12?), but this lets everything fit >in memory and blast out full speed. I don't know if he's displaying a full >screen for each frame, or just alternating between two, and substituting areas. > >Anybody got any other neat demos that Jack can't fake on those ST thingies? > >-- >George Robbins - now working for, uucp: {ihnp4|seismo|rutgers}!cbmvax!grr >but no way officially representing arpa: cbmvax!grr@seismo.css.GOV >Commodore, Engineering Department fone: 215-431-9255 (only by moonlite) Ahhh... Sorry, George, but about TWO MONTHS AGO Xanth Computers displayed a demo VERY SIMILAR in design and execution... a set of four mirrored balls moving in an eggbeater pattern around each other over a scrolling "floor" with the Atari logo as a pattern and beneath a scrolling "ceiling" with a checkerboard pattern. Everything is reflected properly in the balls (in fact, the only way you see the scrolling checkerboard is as a reflection on the tops of the balls) and the shadows are all drawn properly. It was shown at a San Diego Atari computer festival and I'm sure Neil Harris at Atari could tell you more about it. So before you go off making CHEAP SHOTS about who's "faking" whom...