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- Newsgroups: alt.sys.amiga.demos
- Path: sparky!uunet!mcsun!news.funet.fi!funic!news.cs.hut.fi!news.cs.hut.fi!oahvenla
- From: oahvenla@snakemail.hut.fi (Osma Ahvenlampi)
- Subject: Re: Writing a StarField. Which method is best?
- In-Reply-To: mknip@niksula.hut.fi's message of 20 Nov 92 13:57:03
- Message-ID: <OAHVENLA.92Nov20171852@lk-hp-4.hut.fi>
- Sender: usenet@cs.hut.fi (Uutis Ankka)
- Organization: Helsinki University of Technology, Finland
- References: <1992Nov7.104910.60476@cc.usu.edu> <1992Nov11.131803.1276@ifi.uio.no>
- <1992Nov17.211753.11335@ntg.com>
- <LUNDMAN.92Nov19150314@kauri.kauri.vuw.ac.nz>
- <OAHVENLA.92Nov19113731@lk-hp-3.hut.fi>
- <MKNIP.92Nov20135703@valerian.hut.fi>
- Date: Fri, 20 Nov 1992 15:18:52 GMT
- Lines: 27
-
- I said:
- >> Well, there's a easy way of getting sure 50 (or 60) fps without turning off
- >> the interrupts. Use them yourself. Make them high priority ones, and nothing
- >> can stop you from having all the time you want, while the system is running
- >> (well, would be if there's time) in background. If you don't mess with the
- >> copperlists yourself, but use Views for that, you can even switch back and
- >> forth applications... Now all this is unnecessary on a A500, as all the time
- >> is probably used anyway, but what if you have a 25MHz 68030? A lot of time
- >> is left unused, and could be used your something else, provided you don't
- >> do the blitter waiting in busy loops... There are ways around that too.
-
- In article <MKNIP.92Nov20135703@valerian.hut.fi> mknip@niksula.hut.fi (Mats Anders Knip) writes:
- >You do have a point there, but you are forgetting one thing: we are
- >talking demos here, not utilities - and demos aren't usually run
- >in the background. A demo is lika a movie - when you watch a demo
- >you watch the demo and do nothing else. You don't need multitasking in
- >a demo. Switching off all interrupts is perfectly fine in a big demo
- >(especially as a bigger demo usually loads via trackdisk from boot...)
- >as long as you reset the old pointers in the end (naturally...).
-
- The display switching just comes as a byproduct, the big thing is that,
- provided enough power, you can watch demos and download new ones at the same
- time. Even if YOU don't do anything else while watching a demo, you might wish
- that your computer does.
- --
- Osma Ahvenlampi - oahvenla@snakemail.hut.fi * Workstation power for micro-
- All my opinions are not necessarily really mine * computer price: Amiga := FUN
-