HDTenEightyP/NetNews huggingface dataset:
From: spy@inconel.engr.wisc.edu (Mark W. Spychalla)
Subject: X3D 2.0 - A 3D object viewer for X11 now available
Organization: U of Wisconsin-Madison College of Engineering
Date: 3 Sep 92 23:32:14 CDT

Hello,

   Version 2.0 of x3d, a 3D wireframe / hidden line / hidden surface viewer
that runs under X11, is now available via anonymous ftp at
castlab.engr.wisc.edu (144.92.60.140) and is found as /pub/x3d.2.0.tar.Z. 

The new version has some bugs and needs quite a bit of work yet, but should
be quite usable.  The following features have been added since 1.5:

1) Support multiple colors for the non-stereo modes.
2) A new conversion utility that understands polygons.
3) Better optimized rotate, project, clip routines
4) Hidden line / Hidden surface display modes

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   Mark Spychalla   spy@castlab.engr.wisc.edu
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Newsgroups: comp.graphics
From: acslp@jetson.uh.edu (M M Uddin (Pablo) acslp@jetson.uh.edu)
Subject: X terminals
News-Software: VAX/VMS VNEWS 1.41    
Organization: University of Houston
Date: Fri, 28 Aug 1992 05:46:00 GMT

Greetings from Houston,

We are interested in investing on a few X terminals. If anyone has a listing
of the common models and the current prices would you kindly post it or send
me mail. 

Thank you

________________________________________________________________________________
Name: Mohammed Moin Uddin			(Alias: Pablo)
Email: MUddin@uh.edu or acslp@jetson.uh.edu
(H): 8431 Hearth #36, Houston, Tx 77054. Tel: (713) 667-0826
(W): University of Houston, Houston, Tx 77204-5502 Tel: (713) 743-1561 
"For him who follows a path of seeking knowledge, Allah will ease for him 
the path to Paradise." [Muslim]
Newsgroups: comp.graphics
From: ringer@oahu.cs.ucla.edu (Brian Ringer)
Subject: Looking for Sun Raster editor
Originator: ringer@oahu.cs.ucla.edu
Organization: UCLA Computer Science Department
Distribution: na
Date: Tue, 25 Aug 92 23:08:44 GMT

I'm looking for programs on the Sun which allow me to edit a Raster file.  
Does anybody out there have any pointers to such a thing?  Please send
all replies to saw@perceptronics.com 

Thanks


Newsgroups: comp.graphics
From: add@newshub.sdsu.edu (James D. Murray)
Subject: Need TIFF 4.0 specification (yes, "4.0")
Organization: San Diego State University, College of Sciences
Date: Sun, 30 Aug 1992 22:22:09 GMT


I am writing a technical document that includes a section on the history
of the evolution of the TIFF format.  I can't seem to find the TIFF 4.0
spec I once had on-line (and I believe obtained from titan.rice.edu some
time ago).  So, if any history buff out there has an electronic copy of
the TIFF 4.0 spec (and any of the three earlier specs too) please email
it (them) to me.

Thanks.
-- 
James D. Murray
add@sciences.sdsu.edu
Newsgroups: comp.graphics
From: fritz@ra.csc.ti.com (Fritz Whittington)
Subject: Re: Tiff format description wanted
Organization: Texas Instruments
Date: Wed, 2 Sep 1992 19:31:13 GMT


>In article <2479@corton.inria.fr> elias@corton.inria.fr (Banska Bystrica) writes:
>Hi!
>I am looking for TIFF format description. Can you 
>help me ? Thanks.
>Lubos Elias
>

  The TIFF 6.0 Specification (Final - June 3, 1992) is
now available on Internet via public ftp on sgi.com in

  /pub/graphics/tiff/TIFF6.ps.Z

>
-- 
Fritz Whittington Texas Instruments, P.O. Box 655474, MS 446 Dallas, TX 75265
    Shipping address: 13510 North Central Expressway, MS 446 Dallas, TX 75243  
fritz@csc.ti.com             Office: +1 214 995 0397     FAX: +1 214 917 7487
Since I am not an official TI spokesperson, these opinions contain no spokes.
Newsgroups: comp.graphics
From: jefu@nmt.edu (Jeff Putnam)
Subject: IFS and Genetic Algorithms
Organization: The Museum of Differential Geometry
Date: Tue, 25 Aug 1992 22:51:20 GMT

I think a while ago someone posted something on using genetic algorithms
to produce IFS systems for a given image.  Can anyone give me a pointer
to this?

thanks.

-- 
jefu@jupiter.nmt.edu  -- Jeff Putnam, New Mexico Tech, Socorro, NM
"The whole problem with the world is that fools and fanatics are always
so sure of themselves but wiser people are full of doubts." B. Russell
From: davis@gauss.enet.dec.com (Peter Davis)
Newsgroups: comp.graphics
Subject: Re: Graphics Graduate Programs?
Date: 3 Sep 92 15:46:29 GMT
Organization: Digital Equipment Corporation


In article <36914@uflorida.cis.ufl.edu>, gmt@mosquito.cis.ufl.edu (GMM) writes...
>Does anyone know where to find a list of various colleges/universities
>which have computer graphics programs?
>

SIGGRAPH published a career guide book in 1991 that had such a list.  Although
it was not complete, it's a good place to start.  They describe the course
offerings, equipment, etc. for each school.  I don't know if there was a 1992
edition or not.

                   /
                  /
        /  /  /  /		Peter Davis,	Digital Equipment Corp.
       /  /  /  /				davis@3d.enet.dec.com
      /__/__/__/
     /
  __/
From: jan@adonis.hotb.sub.org (Jan Kwoka)
Newsgroups: comp.graphics
Subject: RenderMan file format
Distribution:  world
Date: 21 Aug 92 04:56:15 GMT
Organization: Not an Organization

I've bought "the RenderMan Companion" to get some idea how RenderMan works.
There seems to be an interchange file format to allow exchange of RenderMan
data between applications (e.g.  Some 3D modellers on the MAC use it), just
like  postscript does for 2D data.  But i've never seen such a file.  Could
anyone  just  post  a small piece of data for demonstration purpose to me ?
Just to get an idea of it.

                                                    ThanX


                                                                  Jan Kwoka

     // USENET  : jan@adonis.hotb.sub.org   ADONIS HOST - 6 Frankfurt , Germany
 \\ //  FIDO NET: 2:243/43.4 (Wild-Cat BBS)          PHONE   : ++(049)69-464221
  \X/
From: T.D.Sadlier@massey.ac.nz (T.D. Sadlier)
Newsgroups: comp.graphics
Subject: MORE CLIP ART PLEASE!!
Summary: c
Date: 28 Aug 92 04:43:15 GMT
Organization: Massey University, Palmerston North, New Zealand
X-Reader: NETNEWS/PC Version 2c

Can someone please EMail me and let me know where I can get some
more Clip Art for Desk Top Publishing?  I've managed to get ArtMart
1-4 from the DeskPub directory at Simtel 20 but wondered if there
was any more.  Any help would be appreciated.  Thanks.

Tanya Sadlier
From: kiki@csa.bu.edu (Keith Baccki)
Newsgroups: comp.graphics
Subject: Re: 24-bit color, 4 megabyte VRAM Tseng video card???
Date: 31 Aug 92 19:38:27 GMT
Organization: Computer Science Department, Boston University, Boston, MA, USA
Originator: kiki@csa

In article <1992Aug30.070622.22078@nntpd.lkg.dec.com> halpin@vsg1.dsg.dec.com (Stephen E. Halpin) writes:

>Personally I want a 24-bit i860 EISA card running OpenGL for Windows-NT.  Id be
>just as happy with 1152x870 as with 1280x1024.  For $2,000-4,000 over the cost
>of a 486/50 or entry P5 system it would make a killer entry level 3D system.
>
>-Steve

	By the way, after following the various threads on OpenGL
in the PEX forum, I'm curious as to what type of hardware that
particular OpenGL implementation will support. Will it just contain
standard drivers, or will it utilize any specific acceleration?
I'm not a PC user, but I know that there's virtually hundreds
of possibilities for graphics hardware on those machines. Will
SGI be targeting specific hardware vendors, or will someone pick
up the ball and produce hardware specifically for OpenGL (i.e. 
geometry engines, Z-buffer, etc.) ?

			
				Keith Baccki
From: spl@pitstop.ucsd.edu (Steve Lamont)
Newsgroups: comp.graphics
Subject: Re: What is a good book for Digital Image Processing?
Date: 28 Aug 92 13:53:05 GMT
Article-I.D.: network.17lb41INNik7
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: pitstop.ucsd.edu

In article <1992Aug27.172834@firewalladaclabs.com> jlc@firewalladaclabs.com (Jean-Luc Chatelain) writes:
>Digital Image Processing
>by Williwam K Pratt
>Prentice and Hall (I think)
>
>This is one of the bibles (along with one by Gonzales)

Pratt, William K., _Digital Image Processing, Second Edition_.  New
York, John Wiley and Sons. (1991) ISBN 0-471-85766-1

							spl


-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@dim.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"O generation of the thoroughly smug/and thoroughly uncomfortable...
.. the fish swim in the lake/and do not even own clothing." - Ezra Pound
Newsgroups: comp.graphics
From: aba@lems24lems.brown.edu (Alan B. Arehart)
Subject: mathematical morphology software
Keywords: mathematical morphology
Organization: Laboratory for Engineering Man/Machine Systems
Date: Sun, 30 Aug 1992 21:04:47 GMT

Hi all-
  Does anybody know where I could get free mathematical morphology
software?
	Thanks:-)
	Alan
	aba@lems.brown.edu
From: mtj@babar.asd.sgi.com (Michael Jones)
Newsgroups: comp.graphics
Subject: Re: NCGA Picture Level Benchmark (was: Time to put up or shut up)
Keywords: benchmarks NCGA GPC
Date: 1 Sep 92 21:07:11 GMT
Organization: Silicon Graphics, Inc.

In article <...>, rthomson@mesa.dsd.es.com (Rich Thomson) writes:

|> SGI is very eager to publish its SPECmarks for the processors on its
|> machines.  The SPEC benchmark suite is similar to the PLB benchmark
|> suite in conception.  The only conclusion I can draw from this is that
|> SGI must not perform very well on the benchmark and doesn't want to
|> publish "bad" numbers.

The PLB issue seems the perfect example of the Akin/Thomson dialogues
on graphics programming interfaces. My understanding is that the PLB
suite spends quite a bit of effort (thus time) "editing" the databases
it is drawing. It does this *precisely because applications layered on
API's like PHIGS and PEXlib* tend to spend quite a bit of their time
convincing the graphics layer of their desires. This structural, non-
graphic burden is a major factor in many applications, such as visual
editors, CAD systems, and such.

The direct interface provided by GL and OpenGL avoids this, leaving it
to the application to decide the structural issues. Often, the cost of
editing the structure is zero -- once the desired changes are "known"
to the application, it is then *immediately* able to issue the new
graphics commands.

I feel that an SGI PLB suite benchmark would be hard to interpret. It
would show, in many cases, what the cost (time) would be to do the
very things that SGI has helped its customers avoid needing to do. On
the other hand, it might make a good story ;-)

   (customer) "But why is this PLB application so much slower than
               all the similar applications I see on SGI machines?"

   (salesman) "Because we're using a PHIGS/PEXlib style API."

   (customer) "Oh. I guess it must be the extra data movement and
               redundant PHIGS structure editing."

   (salesman) "Exactly. Now let me show you the OpenGL version."

   (customer) "Wow!. No wonder they stopped making workstations."

Just my personal opinion. I have no doubt that the PLB effort is a
valid one, and I freely admit that meaningful graphics benchmarks are
very hard to develop.

-- Michael Jones    mtj@sgi.com  415.390.1455  M/S 7U-550
		    Silicon Graphics, Advanced Systems Division
		    2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311
Xref: sparky comp.graphics:9250 comp.graphics.visualization:1263
From: ledogar@eniac.seas.upenn.edu (Charles Ledogar)
Newsgroups: comp.graphics,comp.graphics.visualization
Subject: 3d rotation about an arbitrary axis: how?
Date: 28 Aug 92 18:59:56 GMT
Followup-To: comp.graphics
Organization: University of Pennsylvania

My visualization package now needs a flight-simulator-like viewpoint
control.  I have the viewpoint and viewdirection as 3d vectors in object 
space.  I need to rotate the viewdirection vector, for example, "down" wrt to
the current viewdirection.  I've figured out the vector for the axis
(say, (1,3,2) ) of rotation but I don't know the rotation matrix
for rotation about that non-basic axis.  I'd rather not have to convert
to eye-coordinate space.

I vaguely remember some kind of matrix formula for which the familiar x-,
y-, and z-rotation matrices were but special cases.  Does such a 
formula exist?  Something about "Euler angles"...

---Charlie Ledogar
ledogar@eniac.seas.upenn.edu
Newsgroups: comp.graphics
From: jlg@cochiti.lanl.gov (Jim Giles)
Subject: Re: Area of polygons
Keywords: polygon,triangle,constraints
Organization: Los Alamos National Laboratory
Date: Thu, 27 Aug 1992 22:17:31 GMT

In article <1992Aug27.180851.5035@watson.ibm.com>, curt@watson.ibm.com (Curt McDowell) writes:
|> [...]
|> Here's an area formula that so neat I thought I'd post it in addition
|> to sending it to Matt.  It probably extends to 3D as well, but right now
|> I don't have time to test that theory.
|> 
|> /*
|>  * polyarea
|>  *
|>  *   Computes the area of an arbitrary n-point polygon using the following
|>  *   amazingly beautiful formula from high school geometry:
|>  *
|>  *            | x(0) y(0) |       | x(1) y(1) |             | x(n-1) y(n-1) |
|>  *   2A = det |           | + det |           | + ... + det |               |
|>  *            | x(1) y(1) |       | x(2) y(2) |             | x(0)   y(0)   |
|>  *
|>  *   The area is positive if the points are in counter-clockwise order,
|>  *   negative if they are clockwise.

This is an application of green's theorem to a piecewise linear path
integral.  It just *happens* to have the same mathematical form as
a series of determinants.  Care should be taken - if the curve crosses
itself, the answer will be the *difference* of the left-handed and
right-handed enclosed areas.

-- 
J. Giles
From: jc@uh.msc.edu (JC)
Subject: Re: SIGGRAPH member benefits
Organization: Minnesota Supercomputer Center, Minneapolis, MN
Date: Fri, 28 Aug 1992 22:42:30 GMT

In article <71794@apple.Apple.COM> jp@Apple.COM (John Peterson) writes:
>Even more puzzling, if the conference was "hit so hard by the recession",
>why did attendance set a record this year? 

The attendance records were broken by the large number of people attending
the exhibition.  Fewer people than usual attended courses, or even the
papers and panels sessions, which are the real money-makers.

-JC
-- 
jc@msc.edu                         "...and, whether or not clear to you,
                        no doubt the universe is unfolding as it should."
From: kupper@tigger.cs.unc.edu (Mark Kupper)
Newsgroups: comp.graphics
Subject: Re: SIGGRAPH member benefits
Date: 31 Aug 92 21:01:27 GMT
Organization: The University of North Carolina at Chapel Hill


  On a similar note, when are members going to receive the 92 proceedings? I'vebeen waiting a while now. Next time I'll just pick them up at the conference
I guess! You'd think that members would get first copies in the mail.

Newsgroups: comp.graphics
From: bromage@mullauna.cs.mu.OZ.AU (Andrew Bromage)
Subject: Re: Fixed point multiple precision arithmetic source?
Organization: Computer Science, University of Melbourne, Australia
Distribution: usa
Date: Thu, 27 Aug 1992 04:19:19 GMT

clem@bach.udel.edu (Clement Gray Taylor) writes:

>In Dr. Dobb's Journal (August 1992) there is an article titled
>"Multiple-Precision Arithmetic in C" that features a simple "big int"
>package. Has anyone heard of a similar PD package that supports high
>precision (say 256 bit) fixed point math. A graphics project that I am working
>on requires such a package, and I currently don't have enough time to start
>from scratch. Any help would be greatly appreciated.

One of the many versions of Scheme which have appeared (I think it's
CSCHEME) has a file called "bignum" which implements elementary
operations on arbitrarily large floating point numbers. I'ts not really
what you're after, sure, but a lot of the code could be easily modified.

bromage@mullauna.cs.mu.oz.au
Newsgroups: comp.graphics
From: greber@msdrl.com (Terry Greber)
Subject: Mac ==> PC WordPerfect Graphics
Organization: Merck Research Laboratories
Date: Tue, 1 Sep 92 18:10:39 GMT

I need to import scientific graphs from a Mac application such
as Kaleidagraph into a WordPerfect document on an IBM-compatible
PC so that the quality of the graph is retained, i.e., no jaggies!
when it is printed on a laser printer. I am getting the idea that 
Kaleidagraph does not output suitable file formats to make this 
possible. If this is true then I may have drop Kaleidagraph in 
favor of another application. Does anyone know for sure?

Actually, the ideal situation would be to create a Mac Word document
containing graphs, and to translate that into a PC WordPerfect document.
I've tried MACLINK Plus and it's done an acceptable job with the 
translation except for the graphs, which unfortunately end up looking 
like MacPaint masterpieces. I just read some troubling news in the
MACLINK manual, "translations from the Mac to the PC always result in
a bitmap image, regardless of the original nature of the PICT image."

I'd appreciate any ideas or suggestions to help with my quest!

-- Terry Greber
   Greber@MSDRL.COM
From: alistair@mits.com.au
Newsgroups: comp.graphics
Subject: Image negative to positive algorithm
Date: 28 Aug 92 19:39:06 GMT

Does anyone have an algorithm for producing positive images from
negatives.

I would like scan in a photo negative and view it (which is much
faster and cheaper than making test prints, given that the scanner is
already there).

Thanks,

Alistair Grant

Internet:     alistair@mits.com.au
Alternate:    alistair%mits.com.au@ucsvc.ucs.unimelb.edu.au
From: spl@szechuan.uucp (Steve Lamont)
Newsgroups: comp.graphics
Subject: Re: Graphics Formats
Date: 31 Aug 1992 12:58:07 GMT
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: szechuan.ucsd.edu

In article <17t3o1INNf7a@network.ucsd.edu> spl@szechuan.uucp (Steve Lamont) writes:

>Here's the FAQ.  There is also a two part "resource list" that
>follows.

... DAMN!  That was supposed to go out via EMAIL!!!  Now this @^&$#*@
system claims that it isn't my article so I can't cancel it! :-(  My
apologies to the net and to the poster(s) of the FAQ.  If someone
knows how to forge a CANCEL message, I'd appreciate them nuking the
preceding article.

Oh, the same of it.  I think I'll walk around with a bag over my head
for the rest of the day. :-(

							spl
-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@dim.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"O generation of the thoroughly smug/and thoroughly uncomfortable...
.. the fish swim in the lake/and do not even own clothing." - Ezra Pound
From: akin@sgi.com (Allen Akin)
Newsgroups: comp.graphics
Subject: OpenGL on PC displays (was 24-bit color, 4 megabyte VRAM Tseng...)
Date: 31 Aug 92 22:57:13 GMT
Organization: Silicon Graphics, Inc.

In article <95025@bu.edu> kiki@csa.bu.edu (Keith Baccki) writes:
| 
| 	By the way, after following the various threads on OpenGL
| in the PEX forum, I'm curious as to what type of hardware that
| particular OpenGL implementation will support. Will it just contain
| standard drivers, or will it utilize any specific acceleration?
| I'm not a PC user, but I know that there's virtually hundreds
| of possibilities for graphics hardware on those machines. Will
| SGI be targeting specific hardware vendors, or will someone pick
| up the ball and produce hardware specifically for OpenGL (i.e. 
| geometry engines, Z-buffer, etc.) ?

The best way to think of OpenGL for Windows/NT is as an extension to
the usual Windows GDI (Graphics Device Interface).

OpenGL, like GDI, will function on dumb-framebuffer devices.
Developers of accelerated display cards will be able to write device
drivers that speed up selected aspects of GDI or OpenGL.  Exactly which
functions are accelerated will depend on the particular display card
vendor.  The dumb-framebuffer code is always available as a fallback,
so neither OpenGL nor GDI functionality is lost if a vendor is very
selective about the drawing operations it chooses to accelerate.

Microsoft will supply display card developers with sample OpenGL driver
code, just as Microsoft now provides sample GDI device driver (DDI)
code.  In the case of OpenGL, most of the basic code for the OpenGL
drivers will be written by SGI rather than Microsoft.  I assume it will
include lighting, shading, and transformation, among other things,
since any given display card may be able to accelerate only a subset of
those operations.

A number of graphics chip vendors and display card developers have
already approached SGI and Microsoft about supporting OpenGL.

Allen
Newsgroups: comp.graphics
From: eyal@echo.canberra.edu.au (Eyal Lebedinsky)
Subject: WANTED: integer ellipse scan conversion
Summary: Don't want to reinvent the wheel
Keywords: scan conversion, ellipse, integer
Organization: Info Sci & Eng, University of Canberra, AUSTRALIA
Date:  1 Sep 92 13:24:18 GMT

I thought the books will have it - but no. The latest I checked
[FoleyEtAl2ed] uses some floats and the loop calculation are not just
linear (add/subtract). An older book [F.S.HillJr] leaves it as an
exercise to the reader and no on. Circles are nice but useless generaly
because most screen have at least some modes where the pixels are NOT
square.

So, Any reference, program (any language) or description (must be
detailed) will be most wellcome.

No, this is not a course exercise. These days I consider it a compliment
to be mestaken for a student (not that it happens).
Newsgroups: comp.graphics
From: x0y3510@tamuts.tamu.edu (Xuejun Yang)
Subject: Weiler-Atherton Polygon Clipping Algorithm NEEDED
Organization: ~/lib/organization
Date: Wed, 26 Aug 1992 14:31:43 GMT


Could some kind soul send me the Weiler-Atherton Polygon Clipping
Algorithm(It would be better if its in C/C++, I know I am asking
too much). I would like to output all the resulting polygons from
the clipping!

Thanks!
Xref: sparky comp.graphics:9180 comp.unix.ultrix:6503
From: khj@cs.appstate.edu (Kenneth H. Jacker)
Newsgroups: comp.graphics,comp.unix.ultrix
Subject: Building SRGP under Ultrix 4.2A
Date: 26 Aug 92 21:58:05 GMT
Organization: Appalachian State University

I am having trouble building the X11 version of the Simple Raster
Graphics Package (SRGP) of Foley, van Dam, _et_al_ under Ultrix 4.2A
using gcc-2.2.2.

Gcc is detecting a "parse error" in /usr/include/X11/Xlib.h.

I would be very interested in anyone who has successfully built SRGP
under Ultrix or another version of Un*x.

Thanks for your help (and possible diffs!).

--
khj@cs.appstate.edu --- Kenneth H. Jacker --- Boone, NC  28608   USA
Newsgroups: comp.graphics
From: msingh@silver.ucs.indiana.edu (The Supreme Commander)
Subject: Re: X terminals
Organization: Indiana University
Date: Fri, 28 Aug 1992 15:04:48 GMT


>We are interested in investing on a few X terminals. If anyone has a listing
>of the common models and the current prices would you kindly post it or send
>me mail.

I would be interested in this as well.


-- 
---------------------------------------------------------------------
The Supreme Commander wishes you a Supreme day. 
I'm a Magic Man, oooh, I got the magic hands, yeah...
Don't mind me, I'm just attempting to dock.