Xref: utzoo rec.games.programmer:2204 comp.sys.amiga.tech:14405 Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!metro!macuni!mqccsunc!ifarqhar From: ifarqhar@mqccsunc.mqcc.mq.oz.au (Ian Farquhar) Newsgroups: rec.games.programmer,comp.sys.amiga.tech Subject: Re: Animation Speed & Redraw Message-ID: <505@macuni.mqcc.mq.oz> Date: 12 Sep 90 02:14:11 GMT References: <4265@crash.cts.com> <61@pdxgate.UUCP> Sender: news@macuni.mqcc.mq.oz Organization: Macquarie University, Sydney Lines: 31 In article <61@pdxgate.UUCP> griffith@eecs.cs.pdx.edu (Michael Griffith) writes: >anyways. Hmmm. Okay, well if you limit the colors available to each layer >that is scrolling (I assume you are talking about scrolling as in Shadow of >the Beast) perhaps the key would lie in scrolling the sprites at different >rates, so that you could simulate the layers early on, before you had time >to actually set the screen data up. I don't know. Anyone from Psygnosis care >to tell us the full details? BTW: You might notice that in Shadow of the My sprite hardware is a little faulty (16th column is unstable), which reveals some very interesting facts about sprite usage. From looking at SotB I, I would say that the whole moving foreground, from side to side (ie. 320 + pixels) is one big sprite object, with (though this bit is only a guess) four sprites side by side being reused again and again in a scanline. I found this surprising. When I looked into this, I got the impression that the one scan line was only necessary to reload the header info. If you were using the copper to move the data directly into the registers, the maybe sprites can be reused on the same line. I haven't had the time to check this, but it sounds feasable... Comments, hardware hackers? I know that someone in Sydney did a demo called "Bones going home" which was a sendup of SotB, but I don't know his/her/its name to contact them and ask. If definately used the same system, as I got the same "bug" effect. -- Ian Farquhar Phone : 61 2 805-7420 Office of Computing Services Fax : 61 2 805-7433 Macquarie University NSW 2109 Also : 61 2 805-7205 Australia EMail : ifarqhar@macuni.mqcc.mq.oz.au