HDTenEightyP/NetNews huggingface dataset:
From: roband@monu6.cc.monash.edu.au (Robert Andrew)
Newsgroups: comp.graphics
Subject: Bounding Boxes
Date: 20 Aug 92 03:04:55 GMT
Organization: Monash University, Caulfield Campus

I am hoping this is the right place to post this.

Being a beginner in the world of graphics and such, could someone
tell me the uses or papers that introduce both Bounding Boxes
and something that I call "sameness".

This sameness is where to the human looking at a picture it
is the same, whilst to the computer it is different.
AN exmaple includes two circles inside one another and an annulus.

Thanks in advance.
-- 
Robert Andrew, Department Of Software Development
Monash University, Caulfield Campus
Australia
E-mail:roband@monu6.cc.monash.edu.au
Newsgroups: comp.graphics
From: sloan@cis.uab.edu (Kenneth Sloan)
Subject: Re: The Worst of Siggraph (Was 'The Best of Siggraph')
Organization: CIS, University of Alabama at Birmingham
Date: Wed, 12 Aug 1992 20:02:50 GMT

In article <1992Aug12.173253.17737@colorado.edu> speer@anchor.cs.colorado.edu (Rick Speer) writes:
>In a previous note,
>...
>
>I said,
>
>> 5. Unanswered questions about the degree to which Siggraph is run by an
>>    '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 is not entirely accurate. Pat himself did not refuse to answer
>a question, as stated. Instead, he did not allow the second question
>from the floor for a particular paper to be answered, on the grounds
>of a lack of time.

*Not entirely accurate*????  How about, as different as night and day.  

The first version presumes that a session chair knows the answer to
such a question, presumes that it's a proper question to ask during a
session, and accuses Pat of trying to duck the issue.

The second version simply reports that Pat performed his duties as
session chair correctly.  Perhaps the most important job of a session
chair is to meet the schedule.

If you'd like more questions from the floor, please agitate for SIGGRAPH
to specify a fixed time for presentation, to be followed by a fixed time
for questions.  Don't blame the session chair when the presenters use
100% of their alloted time.

If you have questions that didn't get answered - corner the speaker
after the session.  The first question you can ask is, "Why didn't you
leave time for questions".



-- 
Kenneth Sloan                   Computer and Information Sciences
sloan@cis.uab.edu               University of Alabama at Birmingham
(205) 934-2213                  115A Campbell Hall, UAB Station 
(205) 934-5473 FAX              Birmingham, AL 35294-1170
From: wayne@schaefer.math.wisc.edu (Rick Wayne)
Newsgroups: comp.graphics
Subject: info wanted on producing AutoCAD FLIC movies
Date: 13 Aug 92 16:19:47 GMT
Organization: Univ. of Wisconsin Dept. of Mathematics


I'm interested in being able to produce FLIC movies (the AutoDesk movie file
format, also known as .FLI in the MS-DOS world).

does anybody know this format well enough to give me pointers?  even pointers
to pointers (i.e., where to find info) would be very helpful.

yes, the obvious answer is "use AutoCAD", i know, but i'm perverse and want
to create the stuff myself.

please mail replies to wayne@wisplan.uwex.edu; i'll post if people are 
interested.

thanks in advance,

rick
From: mohta@necom830.cc.titech.ac.jp (Masataka Ohta)
Newsgroups: comp.graphics
Subject: Re: The Best of SIGGRAPH 1992
Date: 13 Aug 92 04:40:08 GMT
Organization: Tokyo Institute of Technology

In article <1992Aug11.170255.14445@nas.nasa.gov>
	uselton@wk207.nas.nasa.gov (Samuel P. Uselton) writes:

>used as "userid"?  But really, the paper system is superior in several
>respects:

(6) One can draw figures such as a map.

(7) One can address message for me with Chinese Characters (My name can
be transliterated into Latin alphaets in several different ways).

						Masataka Ohta
From: bce@sactoh0.sac.ca.us (Byron C. Ellis)
Newsgroups: comp.graphics
Subject: Tombstones and fishbowls
Summary: I need a tombstone or a fishbowl
Keywords: Objects wanted
Date: 12 Aug 92 08:12:05 GMT
Organization: Sacramento Public Access Unix

I'm look for objects of either a tombstone, and a fishbowl... (I don't
intend to use them is the same picture, just in case your wondering)
Preferably in DKBTrace format, but Raytrace format would be fine..
   TIA - Byron
-- 
Flying (v) : The art or knack of throwing : Byron C. Ellis
yourself at the ground and missing        : Internet: bce@sactoh0.SAC.CA.US
-The more than complete Hitchikers Guide  :
 to the Galaxy trilogy                    :
Newsgroups: comp.graphics
From: infra@heart.ubc.ca (Infrascan Inc.)
Subject: Question about color
Organization: UBC Pulmonary Research Lab., St. Paul's Hospital, Vancouver, B.C., Canada
Date: Wed, 12 Aug 1992 15:05:54 GMT

	Is it possible to convert a volume in the HSV color space to an 
equivalent volume in RGB space containing the same colors?  For example if
my Hue ranges from (0, 50), Sat from (0.1, 0.2), and the value from (0.3, 0.5)
can that be converted into some sort of volume in RGB space?
	I have no problem converting single points from HSV to RGB and
realize that linear interpolations in the two color spaces are different.
Any comments, hints, references, funny jibes about my lack of mathematical
skill are appreciated.
--
Tim Roy
infra@pulmonary.ubc.ca
"My employer doesn't even know that I have opinions"
Newsgroups: comp.graphics
Subject: Corel Draw
From: <MK7HPPSW@MIAMIU.BITNET>
Date: Friday, 21 Aug 1992 16:27:22 EDT
Organization: Miami University - Academic Computer Service

I'm looking for a FTP site where I can obtain clipart for the formats
compatible with Corel Draw.
 
Any suggestions would be helpful!
 
 
 
Michael
Newsgroups: comp.graphics
From: chand@nyx.cs.du.edu (Chris Hand)
Subject: Re: Where is REND386, really?
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: Sat, 15 Aug 92 13:25:21 GMT

In article <1992Aug14.140142.11097@miles.com> sjm@miles.com (Scott Mark) writes:
>The directory I got of sunee.waterloo.ca pub/raytracers (the described
>home of REND386) includes the following, but where is REND386?:

REND386 is not a ray-tracer, it's a fast 3-D rendering library for
use with home-brew VR-type projects.

If you still want it it's in /pub/rend386 (get demo4.zip).

Chris

Newsgroups: comp.graphics
From: ksung@m.cs.uiuc.edu (Kelvin Sung)
Subject: Cheap(er) Accommodation Available (Eurographics'92) Conference
Summary: cheap(er) accommodation, Eurographics'92
Keywords: Eurographics'92
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
Distribution: comp
Date: Fri, 14 Aug 1992 20:59:54 GMT

I have an extra set of reservation of everything for Eurographics'92
Conference. Looks like this is too late for cancellation, so I will try
to "sell" my extra reservations (at a discount, of course):

Accommodation: Tuesday (8th), Wednesday (9th), and Thursday (10th)
              40 pounds a night (conference cost: 45 pounds)
	
Social events: Complete conference social programme 30 pounds
			   (for a accompanying person staying at the residence hall)
			   (conference cost: 34 pounds)

Guided Tours: Wednesday (English) - 3 pounds (conference cost: 5 pounds)
			  Thursday  (English) - 3 pounds (conference cost: 5 pounds)

Coach visits: Wednesday - 10 pounds (conference cost: 18 pounds)
              Thursday  - 10 pounds (conference cost: 18 pounds)

I am willing to "sell off" part of the above reservations. Just let
me know what you like. If you pay me 150 pounds, you can have everything.

If you think the above price is too expensive, you are welcome to make
me an offer. Please understand that I paid the original price, and I am
a really *POOR* student. Still, please make me an offer, something is
always better than nothing.

Please reply to: ksung@cs.uiuc.edu.

Kelvin Sung.
-- 

Kelvin Sung
University of Illinois at Urbana-Champaign
Department of Computer Science
From: mlp@smsc.sony.com (Mark L. Wood-Patrick)
Newsgroups: comp.graphics
Subject: Representing conics as Bezier's
Date: 14 Aug 92 16:05:01 GMT
Organization: Sony Microsystems, San Jose, CA


-- 

I would like to get some pointers/references on representing conics
(In particular circular and elliptical arc's) as Bezier's.  Does 
anyone have any suggestions.

...Mark Wood-Patrick
...mlp@smsc.sony.com | ...!{uunet,mips}!sonyusa!mlp
...(408)944-4078
From: taylorr@debussy.cs.unc.edu (Russell Taylor)
Newsgroups: comp.graphics
Subject: Re: Shoemake quaternion typos
Date: 20 Aug 92 11:54:41 GMT
Organization: The University of North Carolina at Chapel Hill

In article <rd#n39#.spworley@netcom.com> spworley@netcom.com (Steven) writes:
>Anyone know about any typos in this (key) document?
>
	We found what I wouldn't call a typo, but is sometimes a problem to us:
When doing a slerp, the code sometimes takes the "long way" around.  In other
words, when interpolating between two orientations there is an ambiguity
about "which way around the Earth" to travel, and the code does not resolve
this ambiguity purposefully.
	In particular, I think the long way is taken if the dot product of
the two vectors you are interpolating between is negative but they lie in
the same hemisphere.  Our solution is to dot the two and then negate one of
the vectors (leaving the specified orientation the same).  The code to do this
is inserted right after the cosOmega computation, and follows:

/* If the above dot product is negative, it would be better to
 *  go between the negative of the initial and the final, so that
 *  we take the shorter path.
 */
if ( cosOmega < 0.0 )
    {
    cosOmega *= -1;
    for (i = X; i <= W; i++)
            startQ[i] *= -1;
    }

	Looking back, I don't see that this code will do any good if the
two vectors are not in the same hemispheres, but we have not done interpolation
between disparate vectors so it has not yet bitten us.

	As I recall, the code in the paper was presented as an example of how
some things could be done, not as the end-all-be-all quaternion library, so
the above comments are not a complaint and indeed we have found the code to
be incredibly useful.

	Russell Taylor

-- 
He who follows a path perpetuates that path.
Practice random kindness and sensless acts of beauty.
Newsgroups: comp.graphics
From: broehl@sunee.uwaterloo.ca (Bernie Roehl)
Subject: Re: SigGraph, Chicago, and Unions
Organization: University of Waterloo
Date: Wed, 19 Aug 1992 13:40:41 GMT

In article <1992Aug14.015500.25529@cmcl2.nyu.edu> galanter@nyu.edu (Philip Galanter) writes:
>Yes, unions are _sometimes_ corrupt, wasteful, and/or counter-productive.
>So are the government, banks, Fortune 500 companies, and computer industry  
>standards committees.

So you're defending union corruption on the basis that other people are
corrupt too?

I wasn't at SIGGRAPH, but I know of companies that have refused to exhibit
at shows in Chicago because of the union situation there.  They, too, used
the word "extortion".

People wonder why the U.S. and Canada are losing the productivity battle
to the rest of the world, and I think a large part of the answer lies with
the big labor unions.

-- 
	Bernie Roehl, University of Waterloo Electrical Engineering Dept
	Mail: broehl@sunee.UWaterloo.ca
	BangPath: uunet!watmath!sunee!broehl
	Voice:  (519) 885-1211 x 2607 [work]
Newsgroups: comp.graphics
From: kiwi@iis.ethz.ch (Rene Mueller)
Subject: BLOB -> Polygones (Rayshade)
Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
Distribution: comp
Date: Wed, 19 Aug 1992 17:02:43 GMT

I search an possiblity to convert the BLOB primitive in Rayshade sources
into Polygones or Triangles to render with Phong or Gouraud. Do you have
any idea how to do?

Thank's for your help.
   ,
Rene (kiwi@iis.ethz.ch)
From: mklai@eng.ie.cuhk.hk (Edmund M K Lai)
Newsgroups: comp.graphics
Subject: Medical Ultrasound Images
Date: 20 Aug 92 06:20:08 GMT
Organization: Faculty of Engineering, The Chinese U. of Hong Kong

I am looking for digitized ultrasound images of any part of the
human body.  If you have some or if you know where I can get hold
of some, please email me directly.

Edmund Lai
Department of Information Engineering
The Chinese University of Hong Kong
Shatin, N.T., Hong Kong

email: mklai@eng.ie.cuhk.hk
Newsgroups: comp.graphics
From: bob@sunspot.noao.edu (Bob Riegelmann)
Subject: Re: SigGraph, Chicago, and Unions
Organization: National Solar Observatory/SP, Sunspot NM, USA
Date: Mon, 17 Aug 92 20:38:30 GMT

>galanter@nyu.edu (Philip Galanter) writes:
>Both at SigGraph and now here I have heard/read a number of anti-union  
>slams.  Yes, Chicago is a union town...it is also a town where working  
>class people have a chance to earn a decent living and maybe, if they are  
>careful and frugal, buy a home for their family someday.  

I'd like to take exception to this also, and to point out that SIGGRAPH is
not the only organization to have trouble doing business in Chicago.  My former
housemate was an exhibitor at CES, and they have stopped going to the Chicago
show, simply because of the union situation driving the cost up.  I might 
point out that my housemate was *very* pro union, was a shop steward when he
worked in the wood products industry etc.  Even he thought that the graft, 
yes that's the word he used, was excessive.

In article <hersh.714074256@xenon.lcs.mit.edu> hersh@expo.lcs.mit.edu (Jay Hersh) writes:
>My personal opinion is Chicago is a nice town, but in several instances
>completely separate from SIGGRAPH I found the service dissapointing.
>This could have been my bad luck, or it could be a deeper additudinal
>thing among labor there.

Personal soapbox mode on --

I think it is an attitude problem for them. "I'm entitled to a 
job, no matter how bad I do it, nor how much I overcharge."  They should 
try running the company for a while and find out what the world is really like.

In another point, several union leaders have come out against the free trade 
agreement. I have seen what is going on along our borders, the jobs they
think we will lose to folks to the south, are already lost, right here in 
the states.  For those of you who live along the southern border, look at
your service industry, landscapers, housekeepers, custodians, etc. are 
predominately hispanic, most legal, some not.  The only way to solve the
jobs problem is to make the border areas (both US-Canada and US-Mexico) as
prosperous as we (US) are.  Only then will the "cheap labor" problem stop. 
So get off it unions, use some vision.

psm off

bob



-- 
<=============================================================================>
Bob Riegelmann   Be slow to meddle in the affairs  bob@sunspot.sunspot.noao.edu
P.O. Box 58              of programmers, 
Sunspot, NM 88349-0058       for they get soggy and hard to light.
From: egan@blkbox (Doug Egan)
Newsgroups: comp.graphics
Subject: PCX/GIF to CLP converter???
Summary: Need PCX/GIF to CLP converter...
Keywords: GL GRASP CLP
Date: 20 Aug 92 03:03:43 GMT
Organization: The Black Box BBS (713) 480-2686 V32/V42bis/HST


I would like to know if there is a utility to convert PCX/GIF format
images to Grasp (.clp) format...

I am attempting to use my Super VideoWindows card to create some
gl files... among other things! :)

Thanx,
      Doug g
From: steve@fulcrum.oz.au (Steve Taylor)
Newsgroups: comp.graphics
Subject: Re: (04aug92) comp.graphics Frequently Asked Questions (FAQ)
Date: 13 Aug 92 00:10:35 GMT
Organization: The Fulcrum Consulting Group

In <!=4mc#l.jef@netcom.com> jef@netcom.com (Jef Poskanzer) writes:

>There is no alt.graphics, and there never has been. 

We get it at our site. I read it.

>Jef


							Steve
							steve@fulcrum.oz.au
Newsgroups: comp.graphics
From: hersh@expo.lcs.mit.edu (Jay Hersh)
Subject: Re: SigGraph, Chicago, and Unions
Organization: X Consortium, MIT Laboratory for Computer Science
Distribution: usa
Date: Mon, 17 Aug 1992 18:16:07 GMT

jim@baroque.Stanford.EDU (James Helman) writes:


>Unless I'm mistaken, '89 was Chicago and '79 was Boston.


you are indeed mistaken

--
Hopfen und Malz, Gott erhalts
There is nothing open about OpenGL
Newsgroups: comp.graphics,sci.math
From: watson@maths.uwa.oz.au (David Watson)
Subject: Re: Delaunay Interpolation
Keywords: surface interpolation, Delaunay triangulation, CAGD
Organization: University of Western Australia
Date: Wed, 19 Aug 1992 00:28:55 GMT


pjt@newton.cs.jhu.edu (Paul Tanenbaum) writes:

>     Suppose I have a bunch of sample points from the boundary of a closed
>volume in $R^3$.  Suppose in particular that I have been given the Delaunay
>triangulation of these boundary points.  I'd like to interpolate a $C^3$
>surface through these vertices.  The related surface-interpolation algorithms
>I've found seem not to be applicable:  they either assume that the
>triangulation is regular (usually of degree six) or that the surface is
>monotonic with respect to some plane.
>     Does there exist an algorithm to solve this problem?  References to
>the literature would be greatly appreciated.

There are many ways to interpolate from a Delaunay tesselation.  The quickest
is with barycentric coordinates but is only $C^0$.  If you require higher
smoothness then it is a question of data set size - for 100 data or so just
fit a radial basis spline.  If you must deal with subsets, splines will
give discontinuities at subset boundaries.  Sibson's natural neighbour
interpolation -
Sibson, R., 1981, A brief description of natural neighbour interpolation, _in_ 
Barnett, V., ed., Interpreting multivariate data: John Wiley, p.21--36.
Alfield, P., 1989, Scattered data interpolation in three or more 
variables, _in_ Mathematical methods in computer aided geometric 
design, Lyche, T., and Schumaker, L.L., ed., Academic Press, San Diego,
p. 12-13.
Watson, D.F., and Philip, G.M., 1987, Neighborhood-based interpolation: Geobyte, 2(2),
p. 12--16.
will provide continuous slopes everywhere but at the data points themselves.
Incorporating estimated gradients will give total continuity.

For a summary of interpolation techniques that can be extended to higher
dimensions, see
	ftp marlin.nosc.mil /pub/contour.file
for an ASCII, TeX, or PostScript, file.

Email questions are welcome.
--
Dave Watson                          Internet: watson@maths.uwa.edu.au
Department of Mathematics            
The University of Western Australia               Tel: (61 9) 380 3359
Nedlands, WA 6009  Australia.                     FAX: (61 9) 380 1028
From: ab@nova.cc.purdue.edu (Allen B)
Newsgroups: comp.graphics
Subject: Re: Graphics Gems III Table of Contents
Date: 12 Aug 92 20:03:31 GMT

I had a few people ask me for the ISBN, etc.  Here 'tis:

Type of Material:	Book
LC Call Number:	T385 .G6973 1992
Title:	Graphics gems III / edited by David Kirk.
Publication Info:	Boton : Harcourt Brace Jovanovich, c1992.
Phys. Description:	p. cm.
Series Name:	The Graphics gems series
Notes:	Includes bibliographcal references and index.
Subjects:	Computer graphics.
Other Names:	Kirk, David, 1960-
LC Card Number:	92004467
ISBN:	0-12-409670-0 (with IBM disk : alk. paper)
ISBN:	0-12-409671-9 (with Macintosh disk : alk. paper)
Newsgroups: comp.graphics
From: dre@cray.com (Dennis Ellis)
Subject: Re: RayShade, Animator, TgaFli & AaPlay
Organization: Cray Research Inc
Date: 13 Aug 92 16:13:34 CDT

In article <MAILQUEUE-101.920813135516.448@cbe.qut.edu.au> M.CRAMER@qut.edu.au (Mark Cramer) writes:
>
>
>    I have been playing round with RayShade for a little while now, and
>was going to produce some Fli files of the images I'm creating.  and I've
>hit a little problem.  I have a copy of AutoDesk Animator,  AaPlay (an
>fli player) and TgaFli (which converts a sequence of tga files to an fli)
>
>    The files which TgaFli produces don't have a single palette, so the
>image flickers from frame to frame.  The Docs for TGAFLI say to load the
>Fli in Animator and force it to one palette, which I can do, but then
>AaPlay no longer recognises the Fli file.  The docs also say save the
>single palette in Animator, and use that to recreate the Fli using
>TgaFli. I've tried that too, it just screws up the colours, so they look
>nothing like the originals.
>
>    Does anyone know what I'm doing wrong?  Or is there another way of
>taking a sequence of TGA files and producing an Fli file, with a single
>palette, that AaPlay can play?
>
  I think what you want is a program called 'DTAxxx' (Dave's Targa
Animator??). It is available on most archives. See the weekly Resources
posting if you can't find it. I'm not sure what the latest version is.

  Hope this helps.

  By the way, how do you get your TGA files? The last time I played with
RayShade, I had to modify the source to put the TGA output stuff in myself.
Is it now a standard RayShade output?

-- 
*******************************************************************************
* Dennis Ellis (dre@sequoia.cray.com) *                                       *
* Cray Research, Inc.                 *                                       *
* Eagan, MN 55121                     * All the normal stuff about opinions.. *
Newsgroups: comp.graphics
From: pepo@p500ad.es (Pepo)
Subject: Trident Drivers
Reply-To: pepo@p500ad.es (Pepo)
Organization: Proyecto 500 A.D., Madrid (Spain)
Date: Thu, 20 Aug 1992 07:46:06 GMT

     I have a Trident SVGA 8900 board and I'm looking for drivers for Windows 3.1 in high resolution.
     Does anybody knows where can I get them?

________

Jose Moreno [Pepo B-) ]                 e-mail: pepo@p500ad.es
Madrid, Spain.                          
________


-- 
________
Jose Moreno [Pepo B-) ]                 e-mail: pepo@p500ad.es
Proyecto 500 A.D.                       tel: +34 1 320 19 94
Madrid, Spain.                          fax: +34 1 320 46 00
Newsgroups: comp.graphics
From: scip2053@nusunix2.nus.sg (ZHAO PEI)
Subject: Need data for tongue modeling
Organization: National University of Singapore
Date: Wed, 19 Aug 1992 04:23:41 GMT

Dept of Information Systems and Computer Science
National University of Singapore
Lower Kent Ridge Rd
Singapore 0511

Internet: zhaopei@iscs.nus.sg
	  scip2053@nusunix.nus.sg
Bitnet:   zhaopei@nusdiscs.bitnet
From: nick@sunpix.East.Sun.COM (Nick England - Sun NC Development Center)
Newsgroups: comp.graphics
Subject: Re: SigGraph, Chicago, and Unions
Date: 17 Aug 1992 17:39:25 GMT
Organization: Sun Microsystems, Research Triangle Park, NC
Distribution: usa
NNTP-Posting-Host: trancjne.east.sun.com

In article <16h5lpINN13p@network.ucsd.edu> spl@alex.uucp (Steve Lamont) writes:
>
>Uh... SIGGRAPH 89 was in Boston (another strong Union town), wasn't
>it?  Or did I get on the wrong plane again?

Sorry. I must have experienced some brain fade due to operation at
elevated temperatures.

That should have been SIGGRAPH 79 in Chicago, of course.
Nick
From: capelli@VNET.IBM.COM ("Ron Capelli")
Newsgroups: comp.graphics
Subject: SIGGRAPH conference history
Date: 16 Aug 92 17:15:04 GMT

Here is a summary of SIGGRAPH conference locations...

     Year   Location
     ----   --------
 1.  1974   Boulder
 2.  1975   Bowling Green
 3.  1976   Philadelphia
 4.  1977   San Jose
 5.  1978   Atlanta
 6.  1979   Chicago
 7.  1980   Seattle
 8.  1981   Dallas
 9.  1982   Boston
10.  1983   Detroit
11.  1984   Minneapolis
12.  1985   San Francisco
13.  1986   Dallas
14.  1987   Anaheim
15.  1988   Atlanta
16.  1989   Boston
17.  1990   Dallas
18.  1991   Las Vegas
19.  1992   Chicago
20.  1993   Anaheim
21.  1994   Orlando
22.  1995   Los Angeles
______________________________________________________________________

...Ron Capelli      capelli@vnet.ibm.com        (914) 435-1673

   IBM Corp.,   PO Box 950,   Poughkeepsie, NY  12602