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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...