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Info-Graphics Digest	Sun Mar 22 03:00:30 PST 1987

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Today's Topics:

  8x8 dither matrix
 TV Zoom, Pan and Rotate
  Graphics System Configuration wanted
  GIGI terminal information
 Hoops announcement
 Submission for mod-graphics
 Help! Looking for UIOs for Plot 10 GKS on a Data General machine
  Turbo Graphix Toolbox
 Graphics Info Pointers
 Re: Turbo Graphix Toolbox
 Help Requested: Graphics Packages for HP 9836
 Submission for mod-graphics
 Graphics data sets wanted
      Graphics Standards

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Date: Mon, 2 Mar 87 10:14:35 PST
From: Peter O. Mikes <pom@mordor.s1.gov>


  Info on Sun3 <--> Postscript wanted  - please help
 
    I have Sun's version of cgi for CRT graphics and would like to 
    make hard copies using laser-writer running Postscript --
 
   Is there any cgi driver for Postcript  
     or postcript emulatiom of cgi     ???????????? 

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

Date: Tue, 3 Mar 87 8:19:04 EST
From: Kenneth Van Camp -FSAC- <kvancamp@ARDEC.ARPA>
Subject:  8x8 dither matrix

I don't remember who on this list was asking for an 8x8 dither
matrix, so I'll post to the list:

Here is an 8x8 dither matrix courtesy of Prof. Jan Allebach (Purdue),
described in "Digital Ultrasonic Image Construction Using Electronic
Ordered Dither Techniques", Journal of Nondestructive Evaluation,
Vol. 2 No. 1, 1981 (by Robert A. Blake and Jan P. Allebach).

int	dither8[8][8] = {
	{ 8, 21, 51, 22, 13, 48, 42, 64 },
	{ 50, 33, 38, 11, 55, 25, 17, 12 },
	{ 24, 4, 40, 61, 27, 57, 39, 43 },
	{ 28, 59, 29, 5, 45, 6, 7, 58 },
	{ 19, 54, 34, 18, 62, 23, 47, 16 },
	{ 46, 2, 41, 9, 32, 49, 31, 36 },
	{ 63, 15, 44, 53, 26, 14, 52, 10 },
	{ 37, 60, 1, 20, 56, 35, 3, 30 }
};
	I personally haven't used this matrix, but I've used Allebach's
4x4 matrix with good results.

		  --Ken Van Camp <kvancamp@ARDEC.ARPA>

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

Date: Tue,  3 Mar 87 10:55:09 EST
From: Ed Schwalenberg <ED@AI.AI.MIT.EDU>
Subject: TV Zoom, Pan and Rotate

Just about every news show I've seen lately features a little window
(in the computer sense, not the glass sense) to the right of the
anchorperson's head, which spins and rotates in 3 dimensions and zooms
and pans about the screen.  Usually the window contains the image of the
on-the-scene reporter.

How is this done?  When I was a boy, mapping pixels from a plane in 3-space
(the window) to the reference plane (the broadcast TV image) was hard work,
and could not be done economically in real time.  Now that every neighborhood
TV station can afford to have a box that does this, either some efficient
cheap hardware (i.e., chips) have been built to do this, or a new breakthrough
in graphics algorithms is here.  Does anybody know (at the algorithm or block
diagram level) how to do this?  Also, do they ever zoom beyond 1:1, that is,
map one pixel from the window to several in the reference plane?  If so, is
any interpolation or smoothing done to to eliminate the "fat bits" effect?

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

Date: Fri, 06 Mar 1987 17:58 PST
From: JAJZ801%CALSTATE.BITNET@wiscvm.wisc.edu
Subject:  Graphics System Configuration wanted


  I have an artist friend who would like to have a
computer graphics system (software plus hardware)
that meets the following requirements but is not
excessively expensive. That is, it should be based
on common, consumer type hardware as opposed to the
workstations that are used for specialized CAD/CAM
or film production use. The software can be somewhat
specialized by market, although he'd like to keep the
cost down without sacrificing too much functionality.

The requirements:
1.   The ability to capture real-world pictures, either
     by digitizing stills or freezing video images. The
     less hand tracing the better but ...
2.   The capability to convert these images into a
     mathematical model (as opposed to merely a pixel
     collection) that can be manipulated with graphics
     transforms, particularly rotation, translation, and
     various viewing transformations. I realize that this
     would probably require composing multiple images
     of an object into a single mathematical model in
     several stages.
3.   Good, high-resolution output both to screen and to
     hard-copy devices. Good, editable color capabilites
     are essential.

   PC/AT-based solutions would be preferred but MAC, Amiga,
etc. solutions are acceptable if they do the job. If it
takes specialized monitors and graphics controllers for
the software that's acceptable too. (386 systems OK too).

   Any and all suggestions would be gratefully appreciated.

   Jeff Sicherman
   JAJZ801@CALSTATE.BITNET
   JAJZ801@CCS.CSUSCC.CALSTATE.EDU


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

Date:     Sun, 8 Mar 87 18:14 EST
From: <LMD%CUNYVMS1.BITNET@wiscvm.wisc.edu>
Subject:  GIGI terminal information
X-Original-To:  info-graphics@ads.arpa, LMD

I have an old GIGI monitor and an equally old monitor that has less than
20 lines display.

If I set terminal to VK100 the GNU Emacs editor does-not work. Also
I know for sure that there are some GIGI Graphics Editor images floating
around in the SYSTEM along with Slide Proj. System and Characterset Editor

All I have is a GIGI keyboard monitor and nothing else to go by, so I request
information and pointers to effectively use what ever I have at home.

All information relating to it will be appreciated. I am not on any network or
list so please send me mail directly.

I will post the summary to the network later on. We are a VAX/VMS SITE on 4.4

                                Thanks in advance

                                        BITNET: lmd@cunyvms1
                                        INTERNET: lmd%cunyvms1.BITNET@wiscvm.edu

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

Date: Mon, 9 Mar 87 21:10:19 EST
From: garry@tcgould.tn.cornell.edu (Garry Wiegand)
Subject: Hoops announcement
Organization: Cornell Engineering && Flying Moose Graphics

{2nd try at posting. Please excuse if you've seen this already.}

** Graphics Product Announcement **

In keeping with network etiquette, I will try to make this as brief and to-the-
point as possible. Apologies in advance to anyone who may be offended (but I
hope no one is!)

What we have is a beast called "Hoops". Hoops is a large, 2-D/3-D, general-
purpose display-list graphics subroutine library. Hoops deals with such
things as lines, polygons, text, windows, colors, and cameras. It is
designed to run on on many machines and many displays, and its basic
purpose is to make your life easier when you sit down to write a graphics
application. We've put a lot of effort into: 1) a clean design, 2) speedy 
program execution, and 3) keeping it cheap! 

Software completed:
    
    C language binding
    Fortran language binding

    Support for X-Windows  (tested on Ultrix microVax/GPX's)
    Support for the microVax/GPX running VMS
    Support for the Parallax 1280 on microVax's running VMS
    Support for Postscript laser printers, including the Apple

In progress:

    Pascal language binding

    Support for the Silicon Graphics Iris workstation
    Support for the Sun 3 workstation
    Support for the IBM 5080 on IBM mainframes 
    Support for the Number Nine "Pro1280" on IBM PC/AT's
    Support for the Pixelworks "ClipperBoard" on IBM PC/AT's

Commercial licenses are moderately priced, with large discounts for volume
purchases. University licenses are generally priced at 25% of commercial
licenses; university license fees may, under some conditions, be waived
entirely. Source code is available; demo copies are available.

For further information, call:

    Gary Wayne
    Flying Moose Systems & Graphics
    (607) 273-3690 // The Clinton House // Ithaca, New York 14850

Or send your post-office address to me. Thanks for listening -

    Garry Wiegand   (c/o garry@oak.cadif.cornell.edu)

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

From: Barbara Siefken <barbara%tekecs.tek.com@RELAY.CS.NET>
Date: 11 Mar 87 22:41:34 GMT
Subject: Submission for mod-graphics
Responding-System: tekecs.TEK.COM

Path: tekecs!barbara
From: barbara@tekecs.TEK.COM (Barbara Siefken)
Subject: Help! Looking for UIOs for Plot 10 GKS on a Data General machine
Date: 11 Mar 87 22:41:24 GMT
Distribution: net
Organization: Tektronix Inc., Wilsonville, OR
Lines: 8
Keywords: Plot 10, GKS, Data General

Does anyone out there have (or know of someone who has) device drivers
written for Plot10 GKS on a Data General machine?  If so, please contact

		Guy Blair
		(503)-685-3936
		tektronix!tekecs!oscar!guyb

Thank you in advance for your assistance.

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

Date:     Thu, 12 Mar 87 10:59:05 EST
From: Kenneth Van Camp -FSAC- <kvancamp@ARDEC.ARPA>
Subject:  Turbo Graphix Toolbox

	Due to requests from numerous users to get my public domain
surface modeling program (SURFMODL) running on different graphics
devices besides the IBM CGA, I have purchased the Borland Turbo
Graphix Toolbox and am now attempting to recompile the program
for the Heath/Zenith Z100, Hercules board, and EGA. Not having
access to these devices, it's a little difficult to do. I was
hoping someone could help with one or more of the problems I am
having.
	The manual (and the files accompanying it) were a little
vague; the biggest question I have is regarding the number of colors
available. I notice that Maxforeground for the IBM CGA, for instance,
is 15.  But the problem is that, in graphics mode, you only have 4 
simultaneous colors in med-res mode and 2 colors in hi-res mode.  It appears 
that the toolbox supports only the hi-res mode on this board (or am I wrong 
about this?), and I certainly never would have realized it only had two 2 
simultaneous colors available from looking at the documentation.  So the 
question is, what are the actual number of simultaneous colors available on 
the rest of the devices?  I know the Hercules only has 2, but what is the 
Z-100?  Is it really 7 foreground, plus the background?  If you have info on 
any of the other devices supported by the Toolbox, please let me know.  
Right now here's all I have to go by: 

Hardware          # colors (simultaneous?)
CGA                 2
Hercules            2
Z-100               8
EGA                15
IBM 3270           15
AT&T 6300          15

I assume they know what they're talking about with the resolutions.
	My other question was regarding the Z-100's 7 foreground colors, 
which the manual makes a point of mentioning is limited to numbers greater 
than 0 (can't make Black the foreground color).  So how do you erase a line?  
In other words, one thing I do repeatedly in SURFMODL is draw a line (or 
point) in black, which erases whatever was under the line.
The Z-100 version won't set the foreground color to 0.  
	Actually, I already tried this using the CGA library of the toolbox,
like this:
  SetForegroundColor (0);
  DrawPoint (x, y);
This doesn't even work on the CGA. The point is always colored, not black.
(I don't know what color it is, since I'm working on a monochrome monitor.)
My dithering routines will NEVER work if I can't set a point to black.
	Finally, I sat down at an EGA system for a few minutes to try out
the version I compiled for that, and got the following message upon entering
graphics mode:
Fatal Error: graphics hardware not found or not properly activated
	The only explanation I can think of is that this EGA system doesn't
have any of the special EGA memory, and the Turbo routines are expecting
memory. Does anybody know if this is the case?

		  --Ken Van Camp <kvancamp@ARDEC.ARPA>

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

	  Fri, 13 Mar 87 10:23:44 +0100
Date: 12 Mar 87 15:50:00 GMT-0:00
From: "GMDGKS::PFLUEGER" <unido!gmdzi!gmdgks.decnet!pflueger@seismo.CSS.GOV>
Subject: Graphics Info Pointers

CGI, CGM and GKS are (or will become soon) International Standards.
The respective documents are
   
   Computer Graphics Interface CGI:   ISO DP 9636
   Computer Graphics Metafile  CGM:   ISO DIS 8632
   Graphical Kernel System     GKS:   ISO IS 7942

These documents and further information about Graphics Standardisation
are available at the national standards bodies.
For the U.S. this is

    National Bureau of Standards
    Mr. Mark W. Skall
    Technology Bldg., Rm. A266
    Gaithersburg, MD 20899

    ARPA: SKALL@ICST-ECF or SKALL@ICST-ISE or SKALL@NBS-ECF


Clemens Pflueger			UUCP:   ...unido!gmdzi!kirsch
GMD (Gesellschaft fuer Mathematik       BITNET: GNKP00@DBNGMD21
     und Datenverarbeitung)
PO Box 1240
D-5205 Sankt Augustin 1
F.R.Germany
------

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

Date: Fri 13 Mar 87 11:33:51-EST
From: Gern <GUBBINS@RADC-TOPS20.ARPA>
Subject: Re: Turbo Graphix Toolbox

Ken

The Z-100, for most intent, has only one mode: High res grahics with
8 colors available (0-7) for both forground and background.  Text is
just so much graphics.   Of course, setting the forground and background
colors the same is not of much use, but all combinations, including
black as a forground (Black on Red, etc) are acceptable, and every point
of the 225x640 pixels of the screen can be individually set to any of
the 8 colors.   The only other mode of the Z-100 is interlace (combining
the two available video pages into one) of 640x512 in 8 colors per pixel,
but most applications set it to use 640x480 in 8 colors.   The terms
forground/background are really only of use when using the text display
calls, as all the pixels can be of any of the 8 colors and the text
calls alter an 8 by 9 area of pixels.    A neat, well designed machine...

Cheers,
Gern
-------

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

Subject: Help Requested: Graphics Packages for HP 9836
Date: Thu, 12 Mar 87 11:15:08 -0800
From: John King <king@ICSD.UCI.EDU>


We have four HP 9836CU color graphics workstations for instructional
use.  Our colleagues in the UCI school of fine arts would like to use
these machines for some computer graphical arts work, and were very
impressed with some HP demos they saw.  Of course, the sticky part is
where to get software that provides a good base for doing things like
"painting" or "drawing" and suchlike.  We offered them HP-BASIC, which
came with them, but we did point out that this isn't the customary 
approach to doing graphics....

Does ANYONE have any ideas of where to turn for help on this matter?
HP is totally useless --- both we and the fine arts folks tried to
get some info on HP products (note, not the products of others, but
HP products) and didn't get anywhere.  That's a company run by engineers
for sure.

If you have any leads, please forward them to:

John King
king@ics.uci.edu

Thanks a lot...

John King
Department Chair
Information and Computer Science
UCI

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

From: swatsun!babylon!ruff@seismo.CSS.GOV (Joseph Ruff)
Date: 18 Mar 87 03:53:34 GMT
Subject: Submission for mod-graphics
Responding-System: babylon.swatsun.UUCP

Path: swatsun!ruff
From: ruff@swatsun.UUCP (Joseph Ruff)
Subject: Graphics data sets wanted
Keywords: graphics data set wanted
Date: 18 Mar 87 03:53:33 GMT
Organization: Swarthmore College, Swarthmore PA
Lines: 19


Does anyone out there have a data set they are willing to send us?
We have new graphics terminals and software and we are eager to try
them out without typing in long lists of numbers. We can use almost
any type of data format, but objects made up of triangles or in Movie
BYU format are the best.

We would really appreciate any help and we are willing to forward
any data sets we get to other contributors, if you want to submit
a data set and hopefully get something in return.

Thanks for any help...        The Graphics Lab
                              Physics Department
                              Swarthmore College
                              Swarthmore, PA 19081


                                          Joseph Ruff
                                          ..!ihnp4!bpa!swatsun!ruff

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

Date:         Thu, 19 Mar 1987 11:59:24 EST
From: Lawrence Gottesman <GOTTESMN%RPICICGE.BITNET@wiscvm.wisc.edu>
Subject:      Graphics Standards
Status: R

Would you be able to direct me to a network accessible repository where
the current ANSI and ISO graphics standards and drafts are kept?  I am
interested in GKS and PHIGS standards in particular.

Thanks.


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End of INFO-GRAPHICS
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