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From: klee@wsl.dec.com (Ken Lee)
Newsgroups: comp.windows.x
Subject: Re: simple animation
Message-ID: <1990Oct22.183145@wsl.dec.com>
Date: 23 Oct 90 01:31:45 GMT
References: <1990Oct22.214447.21088@sbcs.sunysb.edu>
Sender: news@wrl.dec.com (News)
Reply-To: klee@wsl.dec.com
Organization: DEC Western Software Laboratory
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In article <1990Oct22.214447.21088@sbcs.sunysb.edu>, ruderman@sbcs.sunysb.edu (David Ruderman) writes:
|> What is the best (smoothest, fastest) way to do some
|> simple animation using X11.R4 on a Sun3?
|> 
|> I would like to do nothing more than move 2D shapes (filled circles)
|> around in a window.

If you have more than a couple of moving objects, you probably want to
do some sort of double buffering.  One way is to draw on a hidden
pixmap, then CopyArea it to the screen all at once.  Another way is to
draw everything to the screen, but play with the colormap so that only
the "interesting" parts are visible.  Finally, you could use the X11R4
double buffering extension.  See the X11R4 ico demo program for sample
code.

-- 
Ken Lee
DEC Western Software Laboratory, Palo Alto, Calif.
Internet: klee@wsl.dec.com
uucp: uunet!decwrl!klee