HDTenEightyP/NetNews huggingface dataset:
From: bobz@truevision.com (Bob Zigon)
Subject: Status of PoVRay 1.0
Summary: What is the status of PovRay 1.0?
Keywords: raytrace
Organization: Truevision Inc., Indianapolis, IN
Date: Mon, 13 Apr 92 21:29:22 GMT

What is the status of PovRay 1.0? Is it available yet? If so, from where?

Bob Zigon
reply to : bobz@truevision.com
From: frank@cs.mcgill.ca
Newsgroups: comp.graphics
Subject: Volume Rendering
Date: 9 Apr 92 02:24:46 GMT
Article-I.D.: cs.1992Apr9.022446.7713
Organization: SOCS, McGill University, Montreal, Canada
Originator: frank@binkley.cs.mcgill.ca


Can anyone tell me whether there is PD volume rendering program for SGI
available? Also I would appreciate it very much if someone can mail me a
list of recent papers on this topic.

Thanks.


-- 
 Email: frank@cs.mcgill.ca          ||    Frank X.J HUANG     
 Tel  : (514)398-2619 (Office)      ||    School of Computer Science   
        (514)737-7366 (home)        ||    McGill University
_Fax  : (514)398-3883_______________||___ Montreal, Canada H3A 2A7 ___
From: kingart@sage.cc.purdue.edu (Paul G. Brayton)
Newsgroups: comp.graphics
Subject: Re: Gif files for UNIX?
Date: 8 Apr 92 01:44:09 GMT
Article-I.D.: mentor.44345
Organization: Purdue University Computing Center

In article <1992Apr2.090328@sdd.hp.com> johnt@sdd.hp.com (John Thomas) writes:
>Hello comp.grpahics newgroup:
>
>I am new to this newgroup and I would like to know where I could find GIF files
>for a Unix workstation.  Please post your responses.
>
>Thank you,
>
>John Thomas

I am also in need of Gif files and sources to view them on.
please relpy at kingart@sage.cc.purdue.edu.

Thanks,
King Arthur.
Newsgroups: comp.graphics
From: Burgess)
Subject: Re: white noise
Organization: University of Western Ontario
Date: Wed, 15 Apr 1992 17:06:17 GMT

In article <32746@darkstar.ucsc.edu> gil@cse.ucsc.edu (Gil Fuchs   (408)  
429-9224) writes:
> howdi net,
> 
> what is the formula (mu, sigma, and other fellars) for white noise?
> why is it called white?  are there other colors (brown, pink, et al.)?

Don't know a formula -- try a really good random number generator!

White noise is unfiltered randomization of frequencies (this is from  
memory -- someone
may want to help me out here)

There ARE other colours as well!  Pink noise is White noise that has be  
filtered somewhat
(I don't exactly remember how but I think its a type of bandpass  
filtering?)

> 
> how does one compute signal to noise ratio?

Have to look that one up --> have it somewhere in this pile ---------


Xref: sparky comp.graphics:5195 comp.graphics.visualization:741 alt.3d:309 comp.realtime:585
From: arnotts@dcs.glasgow.ac.uk (Stephen Arnott)
Newsgroups: comp.graphics,comp.graphics.visualization,alt.3d,comp.realtime
Subject: answer to kiethludwigs question
Summary: renderman
Keywords: graphics
Date: 6 Apr 92 14:34:28 GMT
Organization: Glasgow University Computing Science Dept.


 have been trying to mail you the answer's hopefully of your question's but they allget
	bounced back the address is  odgate%tellab5%keith@uunet.uu.net
	hopefully that's correct if you read this message mail me telling me which
	group you would like the answers posted too



			steve
.
Newsgroups: comp.graphics
From: udptech@uniwa.uwa.edu.au (Denis Brown)
Subject: DIG for WINDOWS anything known ??
Organization: University of Western Australia
Date: Tue, 14 Apr 1992 08:19:24 GMT

Has anyone had experience with a product called DIG for WINDOWS,
produced by Chirp Technical Services of Del Mar, California ?  I
came across their advert in the Winter '92 Programmers' Connection
catalogue and it seems that it may be suitable for my project.

I desire to produce publication-quality graphics output from
electrophysiological data, on a PC platform.  Up to 20 plots per
page, generally simple X-Y (voltage/time) plots, sometimes multiple
(overlaid) plots on common axes, sometimes axes with/without tick
marks, free-form labelling, etc.  My fantasy is that each plot would
be considered as an "object", in that it may be moved, re-sized, etc
to achieve the appropriate visual effect on the final page.  Within
each of the plot "objects" making up a page, one would be able to
independantly edit labels, change axis scaling, change plot line type,
and so on.

I have the necessary C compiler, Windows SDK, experience with Windows,
etc that are pre-requisites for this package and have FAXed Prog. Conn.
to see what their technical team have to say about it, but I would
welcome feedback from readers who have "hands-on" experience with the
product before making the purchase committment.

My e-mail address is    udptech@uniwa.cc.uwa.oz.au
Thanks in advance,
Denis Brown


Newsgroups: comp.graphics
From: ralph@bert.eecs.uic.edu (Ralph Orlick)
Subject: SIGGRAPH '92 Advance Program
Keywords: SIGGRAPH
Organization: University of Illinois at Chicago
Date: Wed, 15 Apr 1992 22:46:47 GMT


                 THE 19TH ANNUAL INTERNATIONAL CONFERENCE ON 
                 COMPUTER GRAPHICS AND INTERACTIVE TECHNIQUES

                               SIGGRAPH '92

                         CHICAGO, IL   July 26-31, 1992

                           sponsored by ACM SIGGRAPH


The advance program for the conference is available on line from
siggraph.org [128.248.245.250] via ftp, in postscript and plain
ASCII text. The postscript files are in   

      info/s92/advanceprogram/postscript

The plain ASCII text files are in

      info/s92/advanceprogram/text

The files are also available via e-mail by sending a request to:

        archive-server@siggraph.org

include a line either in the subject of the body of the message
of the form:
        send advanceprogram index          ;this would send an Index file

        send program-txt courses           ;this would send the text
                                            version of the courses description

        send program-ps registration       ;would send the postscript
                                            version of the registration info

 To receive a copy of the Advance Program, contact:

        SIGGRAPH '92 Conference Management
        (312) 321-6830
        info92@siggraph.org



Ralph Orlick
SIGGRAPH '92 Computer Systems Chair
ralph@siggraph.org

Newsgroups: comp.graphics
From: ddebry@itchy.NoSubdomain.NoDomain (David DeBry)
Subject: Aspect ratio and pixel shape
Reply-To: David DeBry <ddebry@dsd.es.com>
Organization: Evans & Sutherland Computer Corp.
Date: Fri, 17 Apr 92 00:09:52 GMT


	If I'm rendering pictures in RGB that I'd eventually like to
transfer to NTSC, what's the best size of picture I should render?
I've heard that you render in 640x485 square pixels, and then stretch
it afterwards to 785x485 non-square pixels.

	Wouldn't it be more feasible to render in 785x485 non-square
pixels in the first place, and set things like viewing place or window
to data ratios to make the aspect correct?

	What is the correct aspect ratio of these non-square pixels in
NTSC?


-- 
\\\ "Jane, you ignorant slut."                                        \\\
\\\        - Dan Ackroyd in Point/Counterpoint, "Saturday Night Live" \\\
\\\                                                                   \\\
\\ ddebry@dsd.es.com \ ddebry@cc.utah.edu \ debry@cadehp0.eng.utah.edu \\
David DeBry \ Email any address. \ Finger ddebry@cc.utah.edu for details.
From: reyy@vax5.cit.cornell.edu
Newsgroups: comp.graphics
Subject: GIF to PS, GIF viewer for X, VAX/VMS
Date: 17 Apr 92 13:25:44 EDT
Distribution: comp
Organization: Cornell University

Greetings,

I'm not sure if this is the right place to make my request,
if not, can someone direct me:

I am looking for C code to convert GIF to POSTSCRIPT files.

Also, where can I get a GIF viewer for X-Windows, and/or
a VAXstation running VMS?

Thanks for the help!

David S. Rowell
REYY@Vax5.cit.cornell.edu
.sig available upon request
From: bang@maple.circa.ufl.edu
Newsgroups: comp.graphics
Subject: info on ray-tracing warez
Date: 9 Apr 92 21:09:31 GMT
Reply-To: BANG%oak.decnet@pine.circa.ufl.edu
Organization: The CIRCA Underground

Well, this sure looks like the right place... hope y'all can help.

The situation: having been fascinated by raytracing for a long time, I was
very excited to get a copy of DKB Render, and was overly thrilled to find
out that my 486/33 fairly flies thru all this numbercrunching.  However, we
get jaded quickly, so I am now looking for a ray-tracer which will use my
superVGA capabilities.

The problem: I have seen wuarchives graphics/graphics/ray directory, and 
I am overwhelmed.  Really.  There are gobs of programs in there, (and on
other sites too) and so far the "index/readme"'s have been ...er...less than
informative.  I don't know one ray-tracer from the other, and am now looking
for advice.  

The Dream: cad based construction of scene (a la Atari ST's cad3d/cyberstudio)
with objects more complex than yer basic block or sphere....code which will
use the capabilities of a 486....supervga resolution(1024x768x256)....commands
/documentation written for non-doctorates....world peace...winning lotto #'s
(hey, as long as it's a wish list, right?)

The System: 486/33,(no weitek....well, we can't have EVERYthing, can we?),
dos5.0, 4MB ram, tseng4000 supervga w/1MB on video card, more than enough
hard drive space.  Did I forget anything?

The rest: So what do all these different prog's do?  What are the strengths/
weaknesses of each?  Is there an obvious choice for the bells and whistles I
have described?  Which of these will also let me animate?  I have been wanting
to do this kind of stuff fer a long time, and now that I've got the hardware
I need the rest.  Thanks in advance...if posting this info would be redundant
to the regular readership, feel free to email.

Larry Oshins      Bang@maple.circa.ufl.edu
________________________________________________________________________________

                    This Space Intentionally Left Blank
________________________________________________________________________________
Newsgroups: comp.graphics
From: martin@sec.dom.uab.edu (Martin K. Jones)
Subject: Re: Lawnmover Man : GRAPHICS ??
Reply-To: martin@sec.dom.uab.edu (Martin K. Jones)
Organization: University of Alabama at Birmingham
Date: Fri, 10 Apr 1992 14:31:17 GMT


The lastest issue of _Computer Graphics World_, April 1992, has an article on the graphics of Lawnmover Man.
From: lotfi@CS.ColoState.EDU (mohammad abdalla lotfi)
Newsgroups: comp.graphics
Subject: Scene models for Radiosity
Summary: Anyone knows where can I get scene models for Radiosity?
Date: 12 Apr 92 17:31:19 GMT
Organization: Colorado State University, Computer Science Department


 hi
 I am doing some research on radiosity algorithms and I need scene models
 to implement the algorithms. 

 If anyone have ready models he can mail them to me or tell me on which
 sites so I can ftp them.

 Thanks alot.

 lotfi

 e-mail : lotfi@cs.colostate.edu
Newsgroups: comp.graphics
Subject: colour dithering
From: mmt@ccu1.aukuni.ac.nz (Mark Thomson)
Date: Fri, 10 Apr 1992 04:36:15 GMT
Organization: University of Auckland, New Zealand.

I'm looking for an algorithm to dither an RGB colour image. I know how to 
dither monochrome images, but am unable to find any info on colour dithering.
Any help would be appreciated.


Mark Thomson
mm.thomson@aukuni.ac.nz
From: setera@cs.umn.edu (Craig Setera)
Newsgroups: comp.graphics
Subject: X-Windows Dump File format -> ???
Date: 11 Apr 92 02:03:57 GMT
Organization: University of Minnesota, Minneapolis, CSci dept.

Hi!  Does anyone know of a converter program that will take an xwd
dump and convert it to something more usable?  I am interested in
trying to get it to WordPerfect Graphic format in the end and have the
PBMPlus package to use in any way that it might be helpful.  Please 
e-mail.

Thanks,
Craig Setera (setera@cs.umn.edu)
-- 
Craig Setera
(setera@cs.umn.edu)
From: sow@cad.luth.se (Sven-Ove Westberg)
Newsgroups: comp.graphics
Subject: The difference between Sun GS and GT accelerator.
Date: 7 Apr 92 16:11:04 GMT
Reply-To: Sven-Ove Westberg <sow@cad.luth.se>
Organization: University of Lulea, Sweden

I have posted this question earlier to comp.sys.sun.hardware and also
asked Sun Sweden but I have not got any good answers so I would be
very pleased if someone in this group can give me an answer.

I am very interested to get know how big the difference between a
SS2 GS and a SS2 GT. I am not interested in the theoretical figures,
what I would like to know is, did the user notice the difference on
REAL applications such as Mechanical CAD systems (solidmodelling
postprocessing af FEA etc etc eg SDRC I-DEAS) ,dynamical simulations
such as ADAMS.

Regards,

Sven-Ove Westberg, CAD, University of Lulea, S-951 87 Lulea, Sweden.
Xref: sparky comp.graphics:5368 comp.windows.ms:12499 comp.compression:1540
From: erik@cimsand.UUCP (Erik Heuer)
Newsgroups: comp.graphics,comp.windows.ms,comp.compression
Subject: .ATT fileformat
Date: 13 Apr 92 11:38:18 GMT
Organization: Cimage A.S., Sandvika, Norway

I'm inquiring for a friend that does not have net access.

He would like to find out more about a image file format 
with file extension .ATT.  It supposedly covers both
bitonal and color images.  He's already got some info
in some source code following an Everex VGA card, but that
is insufficient.

If you happen to know anything about this, please reply by e-mail
to me (erik%cimsand.uucp@nac.no)

--
-- 
   ___/  /   /  Erik Heuer (E-mail: erik%cimsand.uucp@nac.no)
  _/    ___ /   Cimage A.S, Skytterdalen 6, N-1300 Sandvika, Norway.
____/ _/  _/    Phone: (+47 2) 54 90 40   Fax: (+47 2) 54 58 40
From: geutard@ensl.lip.ens-lyon.fr (Gil-Emmanuel Utard)
Newsgroups: comp.graphics
Subject: Looking for a job in Canada
Date: 7 Apr 92 13:08:23 GMT
Reply-To: geutard@ensl.UUCP (Gil-Emmanuel Utard)
Organization: LIP-IMAG, Ecole Normale Superieure de Lyon


This announce is for a friend of mine, who is looking for a job (Computers
Graphics field) in Quebec or in Ontario.


==============================================================================

	Etant titulaire d'un D.E.S.S Images Numeriques de l'Universite de 
Rennes (Bretagne, FRANCE), je suis a la recherche d'un emploi dans le domaine
de l'infographie au Quebec ou en Ontario.
Ce diplome d'ingenieur d'universite contenait des modules d'enseignement
et de travaux pratiques en Traitement et Synthese d'Images.
Actuellement, j'effectue mon service militaire a Paris en tant que scientifique
du contingent sur le developpement d'utilitaires d'imagerie cartographique et
je serai donc pret a rejoindre une entreprise canadienne, et pourquoi la votre,
des aout 1992.

	Ci-dessous, je resume mon experience en informatique et en infographie:

- Langages: C, Pascal, Lisp, Basic, Assembleur
- O.S et environnements: UNIX, DOS, Sunview, XWindows, Macintosh
- Stations de travail: Silicon Graphics, SUN, P.C, Macintosh, terminal X

- Stages et projets:
	* developpement d'utilitaires en imagerie medicale
	s  (I.G.E Medical Systems, Londres)
	* simulation du mouvement d'une boule sur terrain accidente
	* amelioration d'images par filtrage adaptatif
	* reconnaissance de chiffres manuscrits par reseaux neuronaux
	  (Service de Recherche Technique de la Poste, Nantes)


	Si vous desirez plus d'informations me concernant, contactez-moi 
le plus rapidement possible.
			 	A bientot.
						Gildas PERROT. 


==============================================================================

Please reply to geutard@etca.fr.

-------------------------------------------------------------------------------
  UTARD Gil				       e-mail : geutard@etca.fr
  ETCA - CREA/SP				  Tel : 33 (1) 42 31 92 80
  16 Bis, avenue Prieur de la Cote d'Or		  Fax : 33 (1) 42 31 99 55
  94114 ARCEUIL CEDEX 		FRANCE
-------------------------------------------------------------------------------
From: jennifer@bsu-cs.bsu.edu (Jennifer Freeman)
Newsgroups: comp.graphics
Subject: Printing images with different resolutions then the printer
Keywords: fax resolution scale
Date: 6 Apr 92 16:53:53 GMT
Article-I.D.: bsu-cs.1289
Organization: CS Dept, Ball St U, Muncie, Indiana


I have a program that works with a faxmodem and recieves faxes as files.  I
would like to know where to look to learn how to write a program that would
let me print these out on different resolution printers then the fax data is.
For example a laser printer at 300dpi or a dot matrix print at 92dpi etc
From: hendrik@vedge.UUCP (Hendrik Boom)
Newsgroups: comp.graphics
Subject: Re: Point in Polygon
Date: 8 Apr 92 20:18:38 GMT
Organization: Visual Edge Software, St. Laurent, Quebec

eric@pencom.com writes:
: He showed a proof of how you can cut a square into 
: several pieces to get more area than the original square.

Banach and Tarski showed how you can cut a sphere into five pieces
that can be rearranged into two spheres of the same size, thus
doubling the volume.

Their construction, if such it can be called, was nonconstructive,
using a nonconstructive form of the axiom of choice.

This was a real result, not an April-fool's joke.
-- 
-------------------------------------------------------
Try one or more of the following addresses to reply.
at work:	hendrik@vedge.uucp,  iros1!vedge!hendrik
at home:	uunet!altitude!ozrout!topoi!hendrik
From: pcockere@abcl.co.uk (Pete Cockerell)
Newsgroups: comp.graphics
Subject: Photo CD
Date: 16 Apr 92 17:49:29 GMT
Reply-To: pcockere@abcl.co.uk (Pete Cockerell)
Organization: EO Computer Ltd, Cambridge, UK


About a year ago I posted asking if anyone had details on Kodak's Photo
CD system. I got about two `me too' replies, and that was it! Well,
it's supposed to be launched this Summer, so how about it? Anyone know
what its capabilities are, how much of the colour and spatial
resolution you lose from a 35mm neg, what the players can do (zoom/pan
etc etc)?

Thanks in advance

Pete
Newsgroups: comp.graphics
From: thomas@sunshine.Kodak.COM (Thomas Kinsman)
Subject: Re: SIGRAPH, Never Mind
Summary: Never Mind!
Organization: Eastman Kodak Co., Rochester, NY
Date: Thu, 16 Apr 92 18:12:43 GMT

>	--------------------------------------------------
>	Would someone please post how to find out about
>	SIGRAPH '92....

>	--------------------------------------------------
    Sorry about that, I searched the subject lines for the wrong spelling of
    SIGGRAPH when it was there.... ughh, embarrassment!
--
thomas@acadia.kodak.com    Voice: 716/477-2831(w)	     Fax: 716/722-0160
Thomas B. Kinsman, Eastman Kodak Co., Flr 3, Bldg 65, RL, Roch., NY 14650-1816
Newsgroups: comp.graphics
From: lee@sol.cs.wmich.edu (Fook Heng Lee)
Subject: Lawnmover Man : GRAPHICS ??
Organization: Western Michigan Univ. Comp. Sci. Dept.
Date: Sun, 5 Apr 1992 21:23:30 GMT

HI,
   I just saw the movie the Lawnmover Man - Virtual reality, and I was
really amazed by its computer graphics. Does anyone knows what computer
system and graphics systems which was used to create the animation and
graphics.


Just curious,

Fook-Heng Lee
Western Michigan University
Newsgroups: comp.graphics
From: pmoran@m.cs.uiuc.edu (Pat Moran)
Subject: Re: Distributing Points on a Sphere
Reply-To: Pat Moran <pmoran@ncsa.uiuc.edu>
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
Date: Mon, 13 Apr 1992 21:28:43 GMT

ps@elan.princeton.edu (Peter Schroeder) writes:

>How about placing the desired number of points on the sphere in any old way
>you like and then running a relaxation. Define each point to have a
>repelling force about it and maintain the constraint of staying on the
>sphere. A few iterations of F=MA will give you something that may or may
>not be what you actually had in mind. It certainly does satisfy _some_
>notion of ``evenly distributed''.

>Peter

OK, let's say that we've modeled the points as charges and run a relaxation
method to get a reasonably "evenly distributed" set of points.  How about
a related problem:  specify an ordering of the points such that we
minimize the maximum chord between any two points that are adjacent in
the ordering.  The chord length between the first point and the last
point does not matter.  Offhand I can think of a simple greedy algorithm
where a start point is arbitrarily chosen and then the closest point
to the previously chosen point (of those not used yet) is selected each
time.  I don't think this approach would work too well though, seems
like it could "paint itself into a corner" and end up with occasional
big jumps.

The solution to this would be useful for specifying a sequence of gradient
directions for a magnetic resonance system.  The minimizing the maximum
chord length constraint is important because we want to minimize the
amount we switch the magnetic field after each sample.

Pat Moran
NCSA Biomedical Imaging Group
From: turk@Apple.COM (Ken "Turk" Turkowski)
Newsgroups: comp.graphics
Subject: Re: HELP: Need File Format Specs
Date: 10 Apr 92 18:34:12 GMT
Organization: Advanced Technology Graphics, Apple Computer, Cupertino, CA, USA

chrism@col.hp.com (Chris Magnuson) writes:

>I need copies of the specs for the following file formats.  Can someone help me?

>  - PICT and PICT2
>  - PICS (QuickTime)
>  - PCX
>  - EPS
>  - JPEG
>  - IMG
>  - MacPaint

There are Macintosh technical notes available from Apple developer support for
PICT, PICT2 and MacPaint. Try writing them at

Developer Support
Apple Computer, Inc.
20525 Mariani Ave.
Cupertino, CA 95014
-- 
Ken Turkowski @ Apple Computer, Inc., Cupertino, CA
Internet: turk@apple.com
Applelink: TURK
UUCP: sun!apple!turk
From: dshipley@cs.umr.edu (Dan Shipley)
Newsgroups: comp.graphics
Subject: TSENG 4000 and 3DStudio don't mix
Date: 6 Apr 92 02:05:47 GMT

Hi, all!

I have a TSENG-4000 based board called the Helios HiRez 1280.  It supports  
1280x1024 in 16 colors NON-INTERLACED.  I am having problems getting  
3D-Studio to work with it.  When I start up 3D-Studio, everything works, but  
my computer acts like it switched down to 1MHz or something... you can watch  
the characters being drawn up on the screen!  I only have this problem with  
3D-Studio.  None of my other software exhibits this problem.  Also, there  
seems to be a LOT of hard disk activity while this is going on (like memory  
paging).  I have a 33MHz 486 with 8 megs of RAM and a 240 Mb hard-drive  
(Quantum with a 256K on board cache) and a Colorado 250 Mb tape backup.

Thanks in advance for any help...

Dan
--
*****************************************************************************
   dshipley at cs.umr.edu
or r092592  at apollo.civil.umr.edu     (The University of Missouri - Rolla)
or dan      at ee.umr.edu                    UMR ... The BLACK HOLE !!!
***************************************************************************** 
!
From: eric@pencom.com
Newsgroups: comp.graphics
Subject: Re: De-dithering?
Date: 17 Apr 92 13:29:50 GMT
Article-I.D.: pencom.1992Apr17.132950.5566
Organization: Pencom Software

In article <1992Apr17.013526.12275@msuinfo.cl.msu.edu> klein@kira.egr.msu.edu  
(Jeffrey Klein) writes:
> I've been playing with some simple image-processing programs lately,
> and I've come across something that has me stumped.  When scanned images
> are converted to GIF format, they are dither down to 256 colors.  I
> pesonally think that this dithering usually looks lousy, but as I don't
> have access to 24-bit pictures or displays, I have to make do.
> 
> What I`ve been trying to do is write a program that takes a dithered
> color image and smooths out the dithered areas into flat colors without 
> losing too much detail.  I'm working with cartoon images, which lets
> me assume that any area will either be a flat color, a black outline,
> or some color gradient.
> 
> Problem is, anything I try comes out messy or smudged.  Has anyone out
> there come up with an algorithm for "de-dithering"?  Or has anyone
> found a good reference on the subject?

Well, think about it for a second, a lot of information has been lost.
You can not just get it back out of thin air.

Here is an idea, though.  Make your image 5 times smaller, averaging
pixels.   Blow it back up and use fractal techniques to introduce
false detail.

But anyway, does GIF dither or quantizize?