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Info-Graphics Digest	Sun Dec 15 03:00:28 PST 1985

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Today's Topics:

 news submission
 Need Help With Graphics Processor Selection
      Fractals Articles
 world coordinate transformation

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Date: Tue, 10 Dec 85 13:17:53 est
From: "Richard D. Robison" <rr%gt-cmmsr.uucp@CSNET-RELAY.ARPA>
Posted-Date: Tue, 10 Dec 85 13:17:53 est
Subject: news submission

Subject: Need Help With Graphics Processor Selection
Distribution: net

I am the System Administrator for the Center for Man-Machine Systems Research
at Georgia Tech.  We are thinking of purchasing a graphics processor for our
flight simulator.  So far I have looked at the IRIS 2000,  Chromatics CX1280,
Sun III, and Lexidata 90.

We have a VAX 11/780 running BRL UNIX (4.2 BSD) as our host and two Conrac 7211
13 inch monitors for cockpit avionics (we are not simulating the view).  For our
purpose, the Sun seemed like overkill since it is a full computer.  We really
need something that can be programmed mostly from the VAX with the graphics
processor handling transformations.

If you have any suggestions on other products or comments on the ones I've seen,
I would appreciate the advise.  If someone else has compiled a comparison of
graphics devices,  pleae let me know.

Thanks

Richard D. Robison
Center for Man-Machine Systems Research
School of Industrial and Systems Engineering
Georgia Institute of Technology
Atlanta, Georgia    30332-0205

UUCP:	rr@gt-cmmsr.UUCP
uucp:  ...!{akgua,allegra,hplabs,ihnp4,seismo,ulysses}!gatech!gt-cmmsr!rr


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  17:20:00 CST
Date:         Wed, 11 Dec 1985 13:18 EST
From: William J. Joel  <JZEM%MARIST.BITNET@WISCVM.WISC.EDU>
Subject:      Fractals Articles

During the Spring, 1986 semester I will be teaching a course on
Fractals using "The Fractal Geometry of Nature" by Benoit Mandelbrot.
I would also like to distribute to my students, current articles on
fractals.  If you know of any, please send all references to

     JZEM @ MARIST.BITNET

Thanks!

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Organization: The MITRE Corp., Bedford, MA
Subject: world coordinate transformation
Date: 13 Dec 85 22:41:11 EST (Fri)
From: James R. Van Zandt <jrv@mitre-bedford.ARPA>

I'm implementing the Core graphics routines involving world coordinate
transformations (see Computer Graphics v 13 n 3 p II-68 (Aug 79)).  The
description looks ambiguous to me.  I know the matrix is supposed to
specify an affine transformation, but is it supposed to left-multiply a
column vector, or right-multiply a row vector?
                               - Jim Van Zandt


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