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From: don@CS.UMD.EDU (Don Hopkins)
Newsgroups: comp.archives
Subject: [NeWS] pseudoscientific animation available via ftp ("mapper" example)
Message-ID: <1990May30.041234.29399@math.lsa.umich.edu>
Date: 30 May 90 04:12:34 GMT
Sender: emv@math.lsa.umich.edu (Edward Vielmetti)
Reply-To: don@CS.UMD.EDU (Don Hopkins)
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Organization: University of Michigan, Department of Mathematics
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Approved: emv@math.lsa.umich.edu (Edward Vielmetti)
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Archive-name: spin/30-May-90
Original-posting-by: don@CS.UMD.EDU (Don Hopkins)
Original-subject: pseudoscientific animation available via ftp ("mapper" example)
Archive-site: tumtum.cs.umd.edu [128.8.128.49]
Archive-directory: NeWS/spin
Reposted-by: emv@math.lsa.umich.edu (Edward Vielmetti)

As an example of how to use the "mapper" program I just posted, I have
made available for anonymous ftp the animation that I ran as part of
the "Empowered" performance at CHI'90. It shows an animated spinning
zoom around an extremely detailed pseudoscientific visualization of
the class hierarchy in X11/NeWS. The uncompressed file is 44,910,000
bytes long: 499 300x300 8 bit frames. The compressed file that you
should fetch is 9,312,254 bytes, and you have to uncompress it to view
it since "uncompress < spin/zoom.raw | mapper - ..." doesn't work for
some stupid reason. I hope you can get a good ftp connection and have
lots of disk space.

Just ftp to tumtum.cs.umd.edu (128.8.128.49), set binary mode, and get
the files "NeWS/spin/zoom.raw.Z" and "NeWS/spin/startspin". Put them
in a subdirectory called "spin" under where you started the X11/NeWS
server, uncompress zoom.raw, compile "mapper" and put it into a
directory on your path, then run "spin/startspin" from the directory
where you ran NeWS. I think it should work.

For extra cheap thrills: run the color wheel, and rotate part or all
of the color table during the animation!!!

Under SunOS 4.0.x, the "mapper" program has the annoying tendancy of
paging everything else out by reading through the input file
sequentialy (vadvise doesn't quite work). I have been told that under
4.1, vadvise() can be used to cure this behavior. (I might have to
mmap the input file as well as the shared file, and vadvise sequential
access on the input file's range of memory.)

	-Don