HDTenEightyP/NetNews huggingface dataset:
From: maurice.dion@synapse.isis.org (Maurice Dion) 
Newsgroups: comp.graphics
Subject: Re: wolf 3D
Date: 19 Aug 92 11:38:00 GMT
Distribution: world
Organization: SYNAPSE BBS - GATINEAU, QUEBEC - 819-561-4321
Reply-To: maurice.dion@synapse.isis.org (Maurice Dion) 

TO:slumos@unlv.edu
FROM:moedi@synapse.isi.org
  <1992Aug18.012855.6468@unlv.edu> {Date: Tue, 18 Aug 92 01:28:55 GMT

  {>out of the hardware I was using, but the speed at which wolfenstein-3D (apo
  {>generates its images amazes me.  Can anyone give me a rough overview of how
  {>wolfenstein 3D generates its images?
SL{Try watching the game VERY closely. You will begin to notice alot of
  {little tricks that they use. The guards just bitmaps and have only 8

    Hello Steve. You may try to get MAPEDIT from one of your local BBS.
    There are 276 Images used in the game which provides all the
    background and foreground for the game. The Mapedit program enables
    you to modify the images. Let me know how it works out for you.

 * OLX 2.2 * Moe From Ottawa where problems spawn.
  11:38 am 19-08-92
From: thad@lever.asd.sgi.com (Thad Beier)
Newsgroups: comp.graphics
Subject: Re: SigGraph, Chicago, and Unions
Keywords: Coffee Break!
Date: 14 Aug 92 19:52:04 GMT
Reply-To: thad@sgi.com
Organization: Silicon Graphics

I wasn't going to say anything...but...

It is the session chair that is responsible for making things run on time.
Not some god-anointed AV person, but the session chair.  The AV people
work for Siggraph, not the other way around.  If we were to go over,
and be forced to pay double-time for over time, that should be our
choice, or Siggraph's choice.

We had the first session, and the keynote speakers went significantly over
their allotted time.  Fine.  We started 10 minutes late.  We were told that
we had until 11:55 or we would run into the now famous coffee break, and
divided it up into 4 twenty minute segments that would work fine with no
questions.

The next speaker, the very professional Tom Sederberg, got a message
flashing STOP TALKING NOW 16 minutes into his presentation.  Our
session chair did not see it, we had no idea what was happening when
Tom said "I have to stop talking now" and sat down.  Similarly with the
next two speakers.  Each speaker was told that the session chair would
be regulating his time (like at every other Siggraph conference, and
conferences in general), and had were surprised and struck dumb by
this monitor flashing in your face.  Perhaps by later sessions they had
a countdown running, but I can tell you that they certainly didn't for
the first session.

Sederberg, in particular, had rehearsed his talk many times, knew exactly
how long it would take, planned precisely what he was going to say, timed
his demos to the second, and was incredibly upset about being cut off like
that.  We had all worked for weeks on our presentations, and to be cut off
arbitrarily by *the people working for us* was uncalled for.

(Tom Sederberg is quoted by me without permission.  Sorry)

-- 
Thad Beier..Silicon Graphics..415)390-1028..thad@sgi.com..C-172A N7770T.....FLY!
From: groening@sdsc.edu (Chris Groening)
Newsgroups: comp.graphics
Subject: Computer Animation
Keywords: animation
Date: 21 Aug 92 16:58:01 GMT
Reply-To: groening@sdsc.edu
Distribution: world
Organization: San Diego Supercomputer Center @UCSD.
NNTP-Posting-Host: sluggo.sdsc.edu

Howdy,
	I am looking to get into computer animation and was wondering if anyone
out there could suggest any film schools, preferably ones on the east coast,
but any suggestions would be welcome.
	Also any other avenues that I may wish to pursue would be welcome
as suggestions as well.

Thank you kindly,
	chris (nope, no relation to Matt) groening
Newsgroups: comp.graphics
From: bagchi@eecs.umich.edu (Ranjan Drzzzzt!  Bagchi)
Subject: Fastest Polygon Routine?
Organization: Recreational Creationists, Inc.
Date: Fri, 14 Aug 1992 03:02:12 GMT


	Something I've found that a lot of graphics texts are
vague on.. what is the fastest algorithm for drawing a bunch
of shaded (just lambertian model) filled polygons?  

	Perhaps this is just exceedingly dumb.. but I really
haven't seen any kind of speed comparisons.. In fact... what
*is* a good speed of polygons/sec on say.. a sparc?

	Yours cluelessly... rj
--
Ranjan Bagchi:   Di.sigsgvirusuise                 Ranjan.Bagchi@umich.edu
oo   oooo  o oo   ooo oo oo   oo       o o  oooo ooo o       o        oooooooo
Newsgroups: comp.graphics
From: roihar@cc4.crl.aecl.ca
Subject: looking for xgrasp (grasp) type .gl files via FTP
Organization: AECL RESEARCH
Date: Thu, 13 Aug 1992 13:41:29 GMT

Hoping to find .gl animation sequence files for testing purposes.
Could someone tell me where I can get these (via FTP?) or send me
some????
From: lilleyc@cs.man.ac.uk (Chris Lilley)
Newsgroups: comp.graphics
Subject: Re: Is there a mathematical relationship RGB -> wavelength?
Date: 17 Aug 92 13:43:02 GMT
Reply-To: lilleyc@cs.man.ac.uk (Chris Lilley)
Organization: Department of Computer Science, University of Manchester UK

In article <1992Aug15.022451.11515@cis.uab.edu> sloan@cis.uab.edu (Kenneth Sloan) writes:

>Oh, really?  Pray tell, what underlying mechanism do you propose to
>explain the matching studies?  In your answer, please avoid mentioning
>the cones.

Thsi seems to arise from a mis-reading of my posting.

Accordingly I have mailed Kenneth directly about this, as I mainly refer him to
previous postings and the literature for further information.

I will summarise to the net if there is interest, however.

--
Chris Lilley
---------------------------------------------------------------------------
Technical Author, ITTI Computer Graphics and Visualisation Training Project
Computer Graphics Unit, Manchester Computing Centre, Manchester, UK
Internet:   lilley@cgu.mcc.ac.uk        Janet:   lilley@uk.ac.mcc.cgu
Voice:      +44 (0)61 275 6095          Fax:     +44 (0)61 275 6040
---------------------------------------------------------------------------
From: M21859@mwvm.mitre.org
Newsgroups: comp.graphics
Subject: Help with CGM Format !!!
Date: 19 Aug 92 18:42:00 GMT
Organization: The MITRE Corporation, McLean VA 22102

I am looking for graphics packages, convertion utilities that can handle
graphics files in CGM format. I am mainly interested in packages that run
on Sun Workstations but would appreciate information on products on other
platforms.
 
Thanks in advance
.........................................................................
Cem Dogrusoz
Mitre Corp.
7525 Colshire Dr.
McLean,VA 22101
(703) 883-7313
.........................................................................
Newsgroups: comp.graphics,sci.image.processing,alt.graphics
From: ejd@yabba (eRic Donaldson)
Subject: stereo views(?) of retina?
Organization: The MITRE Corporation, Bedford MA
Date: Thu, 13 Aug 1992 13:04:47 GMT


Hi, I was wondering if anyone out there had some software to create a
stereo image(?) (depth map, not just visually) from two binocular
views (redundant?:  two binocular).  I'm not sure if "stereo" is the
right term, but what I want is to create a depth map view of the
retina, using binocular views.  I hope this is clear.  If not, please
respond and I will try to clarify myself.

Thanks much,

---

eRic [sic] Donaldson
(ejd@babypuss.mitre.org)


Newsgroups: comp.graphics,comp.multimedia,news.groups,rec.arts.animation,sci.image.processing
From: fritz@ra.csc.ti.com (Fritz Whittington)
Subject: Re: TIFF file format
Organization: Texas Instruments
Date: Thu, 13 Aug 1992 15:54:21 GMT

In article <1992Aug12.221421.14686@qdpii.comp.qdpi.oz.au> dres@qdpii.comp.qdpi.oz.au (Drought Research Account) writes:
>Newsgroups: comp.graphics
>Subject: TIFF file format
>Distribution: world
>
>Hi. Can anyone tell me where I can get a copy of the specification
>of the TIFF file format? There was a message here a little while ago
>saying that it was on sgi.com, but it doesn't seem to be there.

I just retrieved it.  It's in graphics/tiff, as TIFF6.ps and
TIFF6.ps.Z.
-- 
Fritz Whittington     Texas Instruments, 12840 Hillcrest #200, Dallas, TX 75230
fritz@csc.ti.com                Office: +1 214 917 7437    FAX: +1 214 917 7487
_Since I am not an official TI spokesperson, these opinions contain no spokes._
Newsgroups: comp.graphics
From: thad@lever.asd.sgi.com (Thad Beier)
Subject: Re: Graphics Gems III gripe
Reply-To: thad@sgi.com
Organization: Silicon Graphics
Date: Tue, 18 Aug 1992 01:23:12 GMT

In article <QeY0Qvm00WB4EF8HtH@andrew.cmu.edu>, ss7m+@andrew.cmu.edu (Steven M. Stadnicki) writes:
|> Generally, the book was quite good, though I don't think it was as good as the
|> first two; perhaps it's just that there isn't much good generalized material
|> left.  But am I the only person who was annoyed by the 'about the cover'?  It
|> seemed to me like nothing more than an advertisement for various Renderman-
|> related products, particularly the VG shaders, and had very little on anything
|> other than 'we used shader X to get Y effect'...
|> 
|>                               Steven Stadnicki
|>                               ss7m@andrew.cmu.edu

I didn't think the previous "About the Cover"'s were really any better,
and I should know.
-- 
Thad Beier..Silicon Graphics..415)390-1028..thad@sgi.com..C-172A N7770T.....FLY!
Newsgroups: comp.graphics,brown.graphics
From: aba@lems22lems.brown.edu (Alan B. Arehart)
Subject: Is there a way to get Greek fonts into ``idraw''?
Organization: Laboratory for Engineering Man/Machine Systems
Date: Tue, 18 Aug 1992 21:57:32 GMT

Does anyone know how Greek characters can be brought into idraw?
I am trying to draw figures for a paper and am frustrated by
the lack of support for using Greek letters in the figures in 
the program idraw.
	-Alan Arehart
	 aba@lems.brown.edu
From: moon!cyberden!dev@well.sf.ca.us
Newsgroups: comp.graphics
Subject: Wolfenstein 3D
Date: Thu, 20 Aug 92 22:40:59 PDT
Organization: Indescribable Creations

Castle Wolfenstein is not using any "3d objects" it is using nothing more 
than scaled bitmaps to creat a very effective illusion of "3D." 


__________________________________________________________________________
   |       /         |\
   | H E   \ Y B E R |/ E N       [ moon!cyberden!dev@well.sf.ca.us ]
From: don@allegra.att.com (Don Mitchell)
Newsgroups: comp.graphics
Subject: re: Worst of SIGGRAPH
Date: 13 Aug 92 16:53:30 GMT
Organization: AT&T Bell Laboratories, Murray Hill, NJ

I've indulged in some SIGGRAPH kvetching myself, so I can agree with
some of Rick Speer's comments about things like the terrible electronic
message system.  But...

>    'old-boy' network... The growing suspicions are not helped by things
>    like Pat Hanrahan, a session chair, refusing to answer a question from
>    the floor about how and why a particular paper was accepted...

This comment is completely inaccurate.  The question had nothing to do
with why a paper was accepted.  Someone simply asked how the work
differed from some previous work.  The question was addressed to the
authors of the paper, not to Pat.  My impression was that things were
behind schedule and Pat just cut the question period short.  Questions
were skipped or cut short all thru the conference this year, and I have
heard that this was partly due to unusual pressure from the A/V
people.  But I'll let someone else tell the Chicago-union stories...
Newsgroups: comp.graphics
From: kkt@philabs.philips.com (Kim-Kiat Tan)
Subject: Re: Diamond 24X problems
Organization: Philips Laboratories, Briarcliff, New York
Date: Mon, 17 Aug 1992 13:27:05 GMT

In article <1992Aug17.002214.13551@infonode.ingr.com> bbrown@infonode.ingr.com (Bailey Brown) writes:
>kpm8447@tesla.njit.edu writes:
>
>
>I have updated my dos gif viewer, SGIF, to support the 24X's 256 color 
>modes (including 800x600 and 1024x768).  I will add 32K and 16.8 mil.
>support as soon as I get the databook for the 24X, as well as targa
>and possibly jpeg support.  SGIF v1.7 is on the simtel archive 
>(192.88.110.20) in the gif directory.  It is free.
>
>------------
>Bailey Brown                               "Above all else, confusion reigns."
>Intergraph Corporation                                  
>bbrown@casca.b11.ingr.com                              Procol Harum

	Is there any viewer for Paradise board using WD90C30 (not
accelerated but wiht Hi-color) to view 32k color ?
From: ads@canon.co.uk (Adam Billyard)
Newsgroups: comp.graphics
Subject: Re: wolf 3D
Date: 18 Aug 92 15:29:25 GMT
Reply-To: ads@canon.co.uk
Organization: Canon Research Centre Europe Ltd

gary@nexnix.demon.co.uk (Gary Howland) writes:

> I used to program games back in my younger days, and knew some ridiculous
> algorithms for squeezing fast graphics (3-dimensional as well as normal stuff)
> out of the hardware I was using, but the speed at which wolfenstein-3D (apogee)
> generates its images amazes me.  Can anyone give me a rough overview of how
> wolfenstein 3D generates its images?

The trick used in Wolf3d to get fast texture-mapping seems to be to use
a non-regular scaling of a pixmap.  If you look at the images generated
you'll see that the texels are not perspective projected - they're
simply scaled (axis-aligned) rectangles.  This gives an OK result but
has the nasty side effect that you're not really texturing polygons. 
You're scaling images.  This means that the larger the texels the more
raggy the edge of the "polygon" is.  The people that did Wolf3D
cunningly arranged for the very "fat pixels/texels" to be clipped off
the edge of the viewport in most cases since they only get real big as
the scaled pixmap gets "close" to the view plane.  It is a really good
effect, but not much use for general 3D geometry. 

Also, keep in mind that in your "younger days" the processors were a lot
slower - well thats what I tell myself when I see some of these games. :-)

	Adam.


-------------
Adam Billyard, Canon Research Centre Europe,
17/20 Frederick Sanger Rd, Surrey Research Park, Guildford, Surrey, GU25YD, UK.
ads@canon.co.uk, ads@canon.uucp, ..!ukc!canon!ads
Tel: +44 (0) 483 574325 Fax: +44 (0) 483 574360
Organization: Queen's University at Kingston
Date: Wednesday, 12 Aug 1992 17:19:06 EDT
From: Joel Polowin <POLOWINJ@QUCDN.QueensU.CA>
Newsgroups: comp.graphics
Subject: Re: Is there a mathematical relationship RGB -> wavelength?

 > For curiosity's sake, I was wondering if it is possible to take a set
 > of RGB color fractions and come up with an approximate wavelength of
 > the observed mixture.  I suppose this could be done by just
 > interpolating between some known values in a table, but I would like
 > to know if there is a way to actually calculate the wavelength.  Of
 > course, I'd also be interested in a formula to compute the RGB
 > fractions for a given wavelength.

If you're interested, I've written a (relatively) short function in C
which takes arguments of RGB values, computes a "brightness" value and
the intensities of the two spectral colours (ROYGBV) present in the
"colour" being described, and returns this information along with a
description in words.  For example, given RGB of 230, 208, 179, it
determines that this has a "brightness" of 80%, a grey level of 70%,
orange 15%, yellow 5%: "lt, sl yelsh org".  (The routine needs some
tweaking yet; on my monitor, this colour looks more like a yellowish
orangey grey.  But the spectral-colour separation isn't bad.)  If
you have wavelength info for some kind of arbitrary standard Orange
and Yellow, you could probably then come up with a reasonable
calculation of a wavelength for something which is 15% orange and 5%
yellow.  What exactly you'd do to get the wavelengths of colours which
combine red and violet I don't know off-hand.  The whole scheme is kind
of arbitrary, but it seems to work fairly well.

Joel
 polowin@silicon.chem.queensu.ca, polowin@chem.queensu.ca,
   polowinj@qucdn.queensu.ca
From: jhallina@waikato.ac.nz
Newsgroups: comp.graphics
Subject: converting bitmap data to object data
Date: 21 Aug 92 11:24:31 +1200
Organization: University of Waikato, Hamilton, New Zealand

I'm looking at writing a small report on converting bitmap data to
object data.

For example, I have the bitmap data for a circle ie

				0000000000
				0000111000
				0001000100
				0001000100
				0000111000
				0000000000

Now, I would like to be able to convert this to something like:
	OBJECT 1: CIRCLE (x 6,y 6, radius 3)

Is anyone able to send me some information or point me in the direction of some
books or magazine articles?

Thanks

Newsgroups: comp.graphics
From: billy@alliant.backbone.uoknor.edu (Billy McPherson)
Subject: Photoshop and HPGL
Summary: HPGL plug-in for Photoshop
Keywords: hpgl photoshop
Organization: University of Oklahoma, Norman, OK
Distribution: na
Date: Mon, 17 Aug 1992 22:05:51 GMT

Does anyone know of a plug-in for Photoshop that will read in an HPGL file?

billy@alliant.uoknor.edu
Newsgroups: comp.graphics
From: chand@nyx.cs.du.edu (Chris Hand)
Subject: Seeking PD vectorizing s/ware
X-Disclaimer: Nyx is a public access Unix system run by the University
	of Denver for the Denver community.  The University has neither
	control over nor responsibility for the opinions of users.
Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept.
Date: Tue, 18 Aug 92 13:02:07 GMT


Anyone know of Public Domain software for converting a bitmapped image
(any format but GIF, PCX etc preferred) into a *Vector* format
(such as EPS, HPGL, Windows Meta-file etc) ...????

(NB: I mean "tracing", not just sticking the bitmap in a PS file!)

If C source is available then fine.  Otherwise PC executables if possible.

Thanks,

Chris   cph@leicp.ac.uk
From: ab@nova.cc.purdue.edu (Allen B)
Newsgroups: comp.graphics
Subject: Re: Is there a mathematical relationship RGB -> wavelength?
Date: 18 Aug 92 17:01:31 GMT

In article <1992Aug17.033205.23903@unocal.com> stgprao@xing.unocal.com (Richard  
Ottolini) writes:
> The psychology of color perception is much more complicated than the response
> of the four kinds of retina cells.  The late Edwin Land of Polaroid was
> fond of showing images composed of two color primaries that appeared to have
> all the colors in it.

I have heard about this through unreliable channels, but
my understanding is that he used two (black and white)
slide projectors.  One had a red filter on it.  Is that true? 

ab
From: frank@whare.cavebbs.welly.gen.nz (Frank van der Hulst)
Newsgroups: comp.graphics
Subject: Re: 24bit > 8bit Display Question
Date: Sat, 15 Aug 92 08:55:25 NZT
Organization: Tech-Soft Systems, Wellington NZ

pgrg9345@uxa.cso.uiuc.edu (pAul rAdja ) writes:

> Question:  I need to be able to display a 24bit image on a 
> pc that only has an 8bit look-up table. Does anyone know of a
> good way or reference on how to optimally fill the
> table up? Speed is a strong consideration in my problem.

Isn't this in the FAQ list?

What you want is a 'quantiser'... I've uploaded to Simtel & garbo a file
called PVQUAN15.ZIP. It includes C source code for two quantisers
(Heckbert's (large & slow) & Octree (smaller and not so slow)).

Frank.

Newsgroups: comp.graphic,comp.graphics
From: gbol@rglnext.geol.vt.edu (Gregory Lampshire)
Newsgroups: comp.graphics
Subject: IBM GDDM raster image format
Date: 13 Aug 92 15:46:39 GMT



I am looking for ANY conversion utilities that will convert IBM GDDM  
raster graphic formatted files into anything else.  I'm not being picky, I  
can convert from most others but GDDM is the stumbling block.  I've got a  
bunch of GDDM images that need to be converted.

Any pointers are greatly appreciated :-) :-) :-)


--
Gregory Lampshire 
Virginia Tech 
Bradley Department of Electrical Engineering
gbol@rglnext.geol.vt.edu (NeXTmail welcome)
------------------------
My opinions are my very own and do not reflect the opinions of any  
employer
Newsgroups: comp.graphics
From: william@lanai.cs.ucla.edu (William Cheng)
Subject: Re: Nice drawing of petri nets
Followup-To: comp.graphics
Originator: william@lanai.cs.ucla.edu
Organization: UCLA Computer Science Department
Date: Fri, 21 Aug 92 06:47:19 GMT

In article <1992Aug20.122325.21010@hubcap.clemson.edu> you write:
>Hello,
>
>(I already sent this to comp.sources.wanted, but got no reply, so I'm
>trying comp.parallel and comp.graphics now.)
>
>I'm looking for algorithms (best in C, Pascal, ...) to draw a given 
>petri net (C/E or P/T) "nice", i.e. input is a list of nodes and edges. 
>Output can be a nice drawing of the given net or calculated coordinates 
>of all nodes. 
>
>I'm interested in other petri net tools (i.e. analysis, editor, ...), too.

How about using a X-based MacDraw-like tool for drawing petri nets?
You can try 'tgif'.  It also allows you to build library of symbols.
You can obtain tgif from the following places through anonymous ftp:

	export.lcs.mit.edu	/contrib/tgif-2.12-p11.tar.Z
	cs.ucla.edu		/pub/tgif/tgif-2.12-p11.tar.Z

	rye.cs.ucla.edu		/pub/tgif-2.12-p11.tar.Z
				/pub/samples_tgif/README
				/pub/samples_tgif/petri.tar.Z

On rye.cs.ucla.edu, there is a small sample of petri net primitives
(place, transition, timed-transidion, and token) and an example.  You
can build more once you understand how to build symbols from the man pages.
-- 
Bill Cheng // UCLA Computer Science Department // (310) 575-4507
3564-C Boelter Hall // Los Angeles, California 90024 // USA
william@CS.UCLA.EDU      ...!{uunet|ucbvax}!cs.ucla.edu!william
From: prestonm@cs.man.ac.uk (Martin Preston (Research Student))
Newsgroups: comp.graphics
Subject: FAQ : The final score
Summary: this is a farce
Keywords: faq, boring, boring, boring, flames, damn lies & statistics
Date: 12 Aug 92 07:41:41 GMT

We've been arguing on this for about 8 months now, and as far as i can tell
we're not actually getting anywhere. New readers must be thoroughly
pig-sick of the argument, whatever justifications there are for it. 

In the spirit of free speech perhaps we ought to just leave the argument
for a while, and make some ~positive~ moves over the subject.

As far as i can see we're going to end up with 2 distinct FAQs + a resource
listing being posted, which in itself isn't such a bad thing. FAQ 'elderly'
isn't too confusing, and won't muddy the waters too much, provided FAQ 'the
next generation' fills the gaping holes. (mixed metaphors..love em)

If you want to make a positive suggestion as the content of the newer FAQ,
either email Juhana or post here, if you want to add to FAQ 'elderly' email its
moderator (as he doesn't read this group :-( ). If you want to notify the
world of a new ftp site email Nick. 

If you want to abuse Jef, email him (and probably me too as i like a good 
laugh :-) :- ) ), or indeed feel free to email anyone, as the 
last thing we want is a "you said this, no i didn't, well you can't 
even speak the language so fuck off" argument broadcast to all the newbies.
Its negative and doesn't get anywhere, experience tells us that no one ever
apologises on USENET :-)

I suggest we form a self-help group (trauma treatment anyone?) to help
Juhana put together the new FAQ, formed of people happy to take the flak,
and who are interested in doing their bit. Dave DeBry (sp?) has mooted the
idea of a mailing list for this, which should help, though in the immediate
future i suggest we just stick to each having long lists of addresses in
to: fields! 


Martin
--
---------------------------------------------------------------------------
|Martin Preston,        (preston@uk.ac.mcc.cgu.v2)    |    S A V E        |
|Computer Graphics Unit, Manchester Computing Centre, |      THE          |
|University of Manchester,                            |    N.U.R.B.       |
|Manchester, U.K., M13 9PL     Phone : 061 275 6095   |                   |
---------------------------------------------------------------------------