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Info-Graphics Digest	Sun Sep 20 03:00:26 PDT 1987

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Today's Topics:

 PROLOG and Graphics
 Graphics Package Wanted
 32 bit frame buffer survey
 Bay Area ACM/SIGGRAPH meeting Careers for the Digital Artist
 help for hardware designer
 Tree-drawing algorithms
 "The Mechanical Universe"
 Dithering
  No FTP, Posting a question
 Re: SURFMODL 1.1 available
 images

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Date: Wed, 09 Sep 87 21:55:03 EDT
From: "William J. Joel" <JZEM%MARIST.BITNET@wiscvm.wisc.edu>
Subject: PROLOG and Graphics

I am presently beginning doctoral research regarding the use of
PROLOG for computer animation.  What I would appreciate are any
references you might have concerning the use of PROLOG (any version)
to create computer graphics in general.  I am specifically interested
in PROLOG, but article relating to LISP or AI would also be
of help.
Thanks!

Bill Joel
Marist College
Poughkeepsie, NY
Bitnet: jzem@marist

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Date: Sun, 13 Sep 87 18:06:16 EDT
From: Srivas@UDEL.EDU
Subject: Graphics Package Wanted



I am looking for graphics packages that may be used on a Sun for representing
finite state machines.  If you have, or know of someone who might have,
developed software to graphically display finite state automata,
please send me mail at

      		ARPA:	srivas@udel.edu
  		BITNET:	srivas@udel.edu
  		CSNET:	srivas%udel.edu@relay.cs.net
  		UUCP:	...!ihnp4!berkeley	-\
  			...!allegra!berkeley	-->!srivas@udel.edu
  			...!harvard		-/
 
If you know of any publications that have information about graphically
displaying finite state machines, please send me mail about them.

Thanks.

						Srivas

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Date: Tue, 15 Sep 87 11:17:35 PDT
From: nengland@Sun.COM (Nick England)
Subject: 32 bit frame buffer survey

[Submitted by David@SUN.com]

When using a 32 bit per pixel in a frame buffer, how do you organize it ??

Assuming 8 bits each of red, green, blue, alpha (0 in a 24 bit buffer),
should red be in the least significant bits?

should blue?
should alpha?
should green?

Cast your vote for RGBA, ABGR, ARGB, or another combination (where Z
represents the least significant bits of WXYZ).  Also, of course include
your reasoning.

Also please send info about how any commercial hardware or software keep data.

Maybe we can develop some consensus to help everyone tired of shuffling
bytes.  A summary will be posted to the net.

Thanks.

-- 
Nick England, Sun Microsystems, Raleigh NC	sun!nengland nengland@sun.com

P.S. If you post your response, please mail a copy to Nick since he is not
on the net.

------------------------------

Date: Tue, 15 Sep 87 18:40:01 pdt
From: Siggraph <siggraph@ames-pioneer.arpa>
Subject: Bay Area ACM/SIGGRAPH meeting Careers for the Digital Artist


"Careers for the Digital Artist" is a Bay Area ACM/SIGGRAPH meeting.
The panel speakers will focus on computer graphic art careers and
educational opportunities in the Bay Area.  Areas of particular
emphasis will include the broadcast/entertainment fields and desktop
publishing.  It will be held Sept. 22, 7:30 pm at the San Francisco
Art Institute auditorium located at 800 Chestnut Street.  Admission
free.  Come early, seating is limited.  For more info, call (415)
321-5046.

------------------------------

From: jr@io.att.com (j.ratsaby)
Subject: help for hardware designer
Date: 15 Sep 87 20:50:43 GMT

I need to know if there are any packages (PC oriented)
that enable a user to enter timing diagrams (instead of
sketching them on a graph paper) and thenany modification
in one timing diagram will influence the edges and the transitions
in all the other timing diagrams (sort of a graphics editor ).


I really appreciate if anyone has any information on something like that
please reply to me personally,
thanks in advance

joel


------------------------------

Date: 16-SEP-1987 16:32:36 GMT -01:00
From: THOWARD <@NSS.Cs.Ucl.AC.UK,@cs.ucl.ac.uk:THOWARD@graphics.computer-science.manchester.ac.uk>
Subject: Tree-drawing algorithms

I'm interested in the automatic (and good-looking!) display of the 
structure of directed graphs (and trees). Has anyone got any experience 
or algorithms they'd be willing to share?

Many thanks,

Toby Howard 
Computer Graphics Unit, Department of Computer Science,
Manchester University, Oxford Road, Manchester, England, M13 9PL. 
Phone: +44 61 273 7121 x5429/5406
Janet: thoward@uk.ac.man.cs.cgu  
ARPA:  thoward%cgu.cs.man.ac.uk@nss.cs.ucl.ac.uk                    

------------------------------

Date: Tue, 15 Sep 87 08:54 EDT
From: <BEGEMAN%MCOIARC.BITNET@wiscvm.wisc.edu>
Subject: "The Mechanical Universe"
X-Original-To:  info-graphics@ads.arpa, BEGEMAN


Does anyone know where the films by James F. Blinn, "The Mechanical Universe"
can be purchased or rented.  I am in the Toledo area, and need some films
for a High school physics class.

        Mike Begeman
        Medical College of Ohio
        Toledo, Ohio

------------------------------

Date: Thu, 17 Sep 87 14:25 N
From: POGET%CLSEPF51.BITNET@wiscvm.wisc.edu
Subj: Window management

Did anyone design specialized hardware for manipulating windows?. I've got an
article from S. Ilgen & D. Scherson describing such a chip which processes
virtual window management.
                           M.-H. Poget, Swiss federal institute of technology
                           POGET @ CLSEPF51.BITNET

------------------------------

Date: Fri, 18 Sep 87 14:01 EDT
From: <BEGEMAN%MCOIARC.BITNET@wiscvm.wisc.edu> (Mail from Mike)
Subject: Dithering

Is anyone familiar with converting 24 bit rgb images to 8 bit
images so that they can be displayed on a 8 bit color frame buffer?

I'am sure there are good algorithms out there, since people like
Apple show them off in the Mac II advertisements.

Literature references or source code (shareware or payware)
would be greatly appreciated.

Thanks in advance.


Mike Begeman
Software Engineer
Medical College of Ohio
Dept of Data Services
CS 10008
Toledo, Ohio 43699


Bitnet:  begeman@mcoiarc

------------------------------

Date:     MON AUG 10, 1987 18.21.02 EDT
From: "Keith J. Werkman (KJW1) NSF-ERC: ATLSS Project B1" <KJW1%LEHIGH.BITNET@wiscvm.wisc.edu>
Subject:  No FTP, Posting a question

[Manually forwarded by the moderator:]

I would like to [ask] a question about SunGKS.  We have version 2.0
and there seems to be problems in doing rubber-band locator input on the
Sun.  I was wondering if anyone else out there has noticed the adverse
effect that we get when we try it....I.e. the System gets a bus error
and reboots.  Obviously a bug...I guess.  Can anyone out there tell me
how to get rubber-band locator input using SunGKS?  (What is the correct
FORTRAN data record for packing...)

Thanks...

    Keith J Werkman
    Lehigh University
    CSEE Department
    Packard Laboratory, #19
    Bethlehem, PA 18015
    (215)785-4508
Nets: ihnp4!c11ux!lehi3b15!scarecrow!keithw
      kjw1@lehigh.BITNET
      keith@lehigh.EDU

------------------------------

Date: Tue, 18 Aug 87 16:52:40 EDT
From: ucbcad!ames.UUCP!mcnc.org!unccvax!wgivax!ab@ucbvax.Berkeley.EDU (Arthur Bell #358)

Subject: Re: SURFMODL 1.1 available

> SURFMODL (surface/solids modeling program for the IBM PC and compatibles)
> version 1.1 is now available from Simtel-20. It is broken into two
> archives; the first contains the full source code (4000+ lines of Turbo
> Pascal code), documentation, and example data files.  The second contains
> several different versions of the executable code to support the Hercules
> graphics board, CGA, EGA, Heath/Zenith Z-100, AT&T 6300, Sanyo MBC-55x, and
> IBM 3270.  You will need the following two files:
> 
> Filename            Type     Bytes     CRC
> 
> Directory PD:<MSDOS.SURFMODL>
> SURFMODL.ARC            BINARY    234507  F713H
> SURFMVSN.ARC            BINARY    346348  5759H
> 
>           --Ken Van Camp <kvancamp@ARDEC.ARPA>
> 

     I have seen your article and am eager to acquire this software.
     Please forgive my ignorance but I do not know how to get to
     this machine to dload.  Could you mail these files to me at
     mcnc!unccvax!wgivax!ram  ??

     Thanks much in advance.



------------------------------

Date: Tue, 1 Sep 87 07:50:30 EDT
From: decvax!mandrill.CWRU.Edu!rbl%nitrex.UUCP@ucbvax.Berkeley.EDU

Re:  HOPGL Graphics Snaring

One solution --- use a print spooler with a big buffer.  Input to
the buffer from the serial port that the HPGL device is "supposed"
to be attached to.  When the graphics output is done, read from the
spooler via the same or another serial port into a file.  Or buy a
second PC and feed its serial port directly, hopefully with X-ON/X-OFF
flow control so nothing is lost when the second PC has to go dump its
buffer to disk.

Rob Lake
decvax!mandrill!nitrex!rbl
ihnp4!cbosgd!mandrill!nitrex!rbl



------------------------------

Date:    Tue, 1 Sep 87 10:55:19 PDT
From: SPIRKOV%PLU@ames-io.ARPA
Subject: images
 
i'm posting this for one of our researchers who needs
a few images for his research on image manipulation.
 
if you have an image you're willing to share, could
you please let me know.  thank you.
 
				Lilly


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