Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site sdcc3.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!ucbvax!ucdavis!lll-crg!dual!qantel!hplabs!sdcrdcf!sdcsvax!sdcc3!ewa From: ewa@sdcc3.UUCP (Eric Anderson) Newsgroups: net.micro.amiga Subject: Re: Amiga reactions Message-ID: <2996@sdcc3.UUCP> Date: Sat, 14-Sep-85 01:14:28 EDT Article-I.D.: sdcc3.2996 Posted: Sat Sep 14 01:14:28 1985 Date-Received: Wed, 18-Sep-85 05:33:26 EDT References: <3568@topaz.RUTGERS.EDU> <368@ssc-bee.UUCP> <918@loral.UUCP> Reply-To: ewa@sdcc3.UUCP (Eric Anderson) Distribution: net Organization: U.C. San Diego, Academic Computer Center Lines: 21 Summary: bouncing balls are easier than you think In article <918@loral.UUCP> jlh@loral.UUCP (Belly Up) writes: >> >> I saw the famous "bounce" program and was blown away. For those who haven't >> seen it, this is an animation of a beach ball bouncing in a room. The beach >> ball is red and white patchwork, and rotates on its axis as it moves. It >> has a shadow which follows it across the floor and the background. >I saw this running on a monitor at SIGGRAPH and the demo was pretty impressive. >However, one should realize that for the show a lot of manufacturers spent >several minutes drawing a picture, then saved the picture to disk or videotape. >Do this several times and you have an animated feature. You'll never guess >what they showed during the demo. Thats right, they showed the canned >pictures. If the amiga was drawing this beachball as it went then this is >one helluvan impressive system, but I wouldn't count on it. Especially >if that 8% number is correct...... Actually such a program is no big deal. several small images of a beach-ball in various stages of rotation are saved in memory and then copied onto the screen with a block move. when used in order, the ball appears to be rotating. No big deal, and very little processor work. E. Anderson, UC San Diego {elsewhere}!ihnp4!ucbvax!sdcsvax!sdcc3!ewa