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From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: MacTutor gripe!!!
Message-ID: <25143@ucbvax.BERKELEY.EDU>
Date: 20 Jul 88 22:37:18 GMT
References: <730043@hpcilzb.HP.COM> <730044@hpcilzb.HP.COM>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
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In article <730044@hpcilzb.HP.COM> tedj@hpcilzb.HP.COM (Ted Johnson) writes:
>And David Phillip Oster, who wrote that wierd staircase program a while back
>(with the continually-increasing tone) said that the reason he wasn't posting
>the LSC source code to the net was because he was submitting it to MacTutor.

Thanks for the reminder. I'll get that article in in early August. (by the
way, someone at Mactutor probably reads this newsgroup: I just got an
acknowledgment yesterday for the article I sent them 17 months ago, on 3-D
splines using LightSpeed C and Graf3d. Let me quote from the letter I got
yesterday:

"P.S. Please forgive the formality of this reply, but we want to
acknowledge your submission as quickly as possible."

Oh well, I want to revise the part of the article where I discuss the
definition of splines anyway.

I've got another article ready for them on antialiased-text.

Ed Falk at Sun just posted a nifty program in comp.graphics under the
name:
Subject: Re: Yes, it's another STUPID QUESTION...  ALGORITHM POSTING

He talks about combining dithering and raytracing to do arbitarily complex
scenes that do animated shadow motion using color table animation.  

This means you can show the user a complex landscape, and as you animate
the sun arcing across the sky, all the shadows are moving just the way
they should.

I'm very excited about this, because it tells in detail how to do it. I
came up with this idea indpendently, and only as a bit of interesting
technical detail for the novel: "The Paradise Tree" by Diana L. Paxson.
(I was Diana's technical consultant.)

Now there's a meaty three-part article for Mactutor:
Part 1: Ray Tracing
Part 2: Dithering
Part 3: Put it all together with color table animation.

--- David Phillip Oster            --When you asked me to live in sin with you
Arpa: oster@dewey.soe.berkeley.edu --I didn't know you meant sloth.
Uucp: {uwvax,decvax,ihnp4}!ucbvax!oster%dewey.soe.berkeley.edu