HDTenEightyP/NetNews huggingface dataset:
From: acc@asterix.inescn.pt (Antonio Costa)
Subject: MAC-RTrace 1.0 * ray tracing in the MAC
Keywords: Ray tracing
Organization: CG & CAD - INESC Norte
Date: Fri, 13 Nov 92 15:50:20 GMT

***** M A C  u s e r s *****

The MAC-RTrace 1.0 ray-tracer is available in directory
pub/RTrace/Macintosh at asterix.inescn.pt [192.35.246.17] in files

	rtrace-1.0.cpt.hqx	- the application and manuals
	rtrace-1.0-src.cpt.hqx	- the source
	scenes-1.0.cpt.hqx	- demo scenes to ray trace

Please ftp at night (our time is GMT).

It is also available in sumex.stanford.edu and somewhere in umich.edu

It is necessary to have Compact-Pro to extract the files...
Please feel free to get it and use it.
Hope you like it.

Here goes the Readme file that Reid Judd wrote:
---------------------------------------------------------------------
  The file 
    rtrace-1.0.cpt.hqx
  contains the Mac-RTrace-1.0 application and complete manuals
  in Microsoft Word and TeachText format.  This version of RTrace
  requires at least a Mac with a 68020/68881 FPU but it is possible
  to build a version from the source that does not have this
  restriction.

  Two small scene files (demo.sff and sphere.sff) are included. 

  RTrace was written by Antonio Costa at INESC-Norte in Portugal.  The
  MacIntosh version was written by Greg Ferrar at Ohio State and myself
  (Reid Judd at Illuminati).
 
  RTrace supports these capabilities:
    point lights, directional lights, spot lights with fall-off, extended
    lights, 2 ways of defining surfaces, spheres, axis-aligned
    parallelipipeds, cylinders, cones, bicubic patches, polygons,
    polygonal patches, high quality 3D text, CSG operations,
    4x4 matrix transformations, textures, depth of field, diffuse
    distribution, stereoscopic pair creation, ...
 
    Procedural textures (with 4x4 matrix transformations) are also
    supported: checkerboard, color blotches, marble, bump map,
    fractal-brownian-motion, wood, glossy, image mapping, waves,
    and many others.
 
  Mac-RTrace uses parametric equations (using an algebraic equation
  parser) to define animations and it outputs PICT images, PPM images,
  and (of course) QuickTime movies.
 
  Enjoy, 
            -- Reid Judd
 
     ILLUMINATI@AppleLink.Apple.Com
     2617 Sweetbriar Rd.
     Durham, NC 27704
---------------------------------------------------------------------
 
Regards,
Antonio Costa.
.........................................................................
     O     O
    /     /                        I N E S C
   | O   |        Antonio Costa        | E-Mail   acc@asterix.inescn.pt
   | |\  |   O                         |          acc@basinger.inescn.pt
   | | \ |  /  O  Comp. Graphics & CAD | DECnet   inescn::a_costa
   | |  \| /  /                        | VAX-Mail +26802001576::a_costa
   | |  /  | |    Largo Mompilher 22   | UUCP     {mcvax,...}!...
   O | |-O | |    4100 Porto PORTUGAL  | Bell     +351+02+321006
    /   \ /   \
   O     O     O          "Let the good times roll..."
Newsgroups: comp.graphics
From: eylerken@milton.u.washington.edu (Ken Eyler)
Subject: POV questions
Reply-To: eylerken@u.washington.edu
Organization: University of Washington, Seattle
Date: Fri, 13 Nov 1992 08:48:20 GMT

      Whne using POV, I find a lot of referneces to UNITS.  (ie move camera 12  
up.)  What are these UNITS equivilant to? inches - pixels - screen res??

      Also, I am looking for some code that will render a human eye, or pretty e
to one.  anything halfway decent will do.

      And I forget where the FTP site for objects and stuff is, can someone give
address.

thanks alot..

:ken
:eylerken@u.washington.edu



.
Newsgroups: comp.graphics
From: mlelstv@speckled.mpifr-bonn.mpg.de (Michael van Elst)
Subject: Re: N bit planes/pixel or N bits/pixel?
Organization: Max-Planck-Institut f"ur Radioastronomie
Date: Tue, 10 Nov 1992 22:40:44 GMT

In <1dn8rjINNdq3@kitty.ksu.ksu.edu> sdoran@kitty.ksu.ksu.edu (Steven Marcotte) writes:
>  What is the advantage of N bitplanes/pixel over N bits/pixel?  I would
>think that the N bin/pixel (packed-pixel) representation would offer
>better speed than jumping through memory and performing bit twiddling,
>especially at 8 bits/pixel.

It depends on what you are doing. With areas wider than the word length
the overhead of bitplanes becomes neglible. On the other hand packed
pixels work only good for common word sizes, i.e. 8bit (256 colors),
16-bit (65536 colors) and 24bit+8bit (16 million colors + alpha channel).
This means that you can't scale the pixel resolution (bits per pixel)
easily, bitplanes on the other hand are more flexible.

One problem with bitplanes is the higher complexity of the hardware since
somewhere before the DAC you need to have chunky pixels again. That's why
bitplane architectures with deep pixels are rare.

Regards,
-- 
Michael van Elst
UUCP:     universe!local-cluster!milky-way!sol!earth!uunet!unido!mpirbn!p554mve
Internet: p554mve@mpirbn.mpifr-bonn.mpg.de
                                "A potential Snark may lurk in every tree."
From: mh-b@minster.york.ac.uk
Newsgroups: comp.graphics
Subject: FREE RenderMan fod PC's!!!!
Date: 13 Nov 92 18:02:18 GMT
Organization: Department of Computer Science, University of York, England


Do you want a FREE copy of RenderMan for a PC base? Well so do I, so if you come
across one let me know! BUT, now that I've got youe attention I'd like some
info on a particular topic :

I'm doing some research with interactive motion guidance systems for
cinematic cameras. Cast your mind back to the 'old' days of the 'original'
special effect techniques of moving a model past a fixed camera, well today
the same (actually better!) results are achieved by applying the inverse of
moving the camera (using a robot manipulator) and keeping the model
stationary. Typical effects of this method (only without the robot control) 
can be seen in the frequent shots of the USS Enterprise on the New Generation
of Star Trek. ILM keep the model fixed and run the camera numerous times over 
a fixed track.

What I'm interested in is any information relating to existing methods in
'real' applications today. The academic world has little feel of the outside
practicalities of implementation and consequently make it hard to find out
any useful info in these areas!

Can anyone using guided manipulators, or camera booms, whether interactively
or not get in touch and lend a hand.

The results are interactive control, and path planning, for model shots 
using a virtual manipulator.

Any chance of some help?

Martin

[mh-b@uk.ac.york.minster]
Newsgroups: comp.graphics,comp.animation
From: ewright@convex.com (Edward V. Wright)
Subject: Re: graphtal 1.0 : First public release available
Date: Mon, 9 Nov 1992 21:50:20 GMT
Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.

In <1992Nov4.194529.13868@cc.tut.fi> jk87377@cc.tut.fi (Juhana Kouhia) writes:

>PS. I know what is the L-system, so don't e-mail the description.

You left out the "na-na-na-na-na-na!"

For those who, after reading Mr. Kouhia's very polite, very helpful 
reply, a Lindenmeyer- or L-system is a context-free grammar for modelling
the growth of plants and other biological (or pseudobiological) systems.
 
From: warrend@tisdec.tis.tandy.com
Date: 11 Nov 92 11:54 CST
Newsgroups: comp.graphics
Subject: Re: WANTED: The Mind's Eye
Message-ID: <5600001@tisdec.tis.tandy.com>
Nf-ID: #R:blue.cis.pitt.edu.UUCP:9413:tisdec.tis.tandy.com:5600001:000:293
Nf-From: tisdec.tis.tandy.com!warrend    Nov 11 11:54:00 1992



>I'm looking for a graphics video called _The Mind's Eye_.
>If anybody knows anything about such a program, please email me for I
>am not a regular reader of this newsgroup.
>Any references to others who might know would also be helpful.

This is available on VHS at your local Radio Shack.
From: ledwards@leland.Stanford.EDU (Laurence James Edwards)
Newsgroups: comp.graphics
Subject: Re: polyhedron/polyhedron intersection
Keywords: 3d graphics, intersection
Date: 12 Nov 92 22:59:18 GMT
Organization: DSG, Stanford University, CA 94305, USA

In article <1992Nov12.161117.24398@cs.wisc.edu>, seitz@cs.wisc.edu (Steve Seitz) writes:
|> In article <1992Nov12.091352.5323@leland.Stanford.EDU>, ledwards@leland.Stanford.EDU (Laurence James Edwards) writes:
|> |> In article <1992Nov12.011952.1154@cis.uab.edu>, sloan@cis.uab.edu (Kenneth Sloan) writes:
|> |> |> [......]
|> |> |> 
|> |> |> Here's a nice simple question to keep everyone occupied (sit down Joe -
|> |> |> this one's not for you).  
|> |> |> 
|> |> |> GIVEN an arbitrary, simple polyhedron, P.
|> |> |> 
|> |> |> FIND the largest (greatest volume) convex polyhedron completely
|> |> |> contained in P.
|> |> 
|> |> Interesting question ... well it would seem that you'd have to split the
|> |> polyhedra with planes containing each concave edge. It would also seem that
|> |> to maximize the volume the splitting plane would have to contain a face.
|> |> So split the polyhedra up into convex pieces with two splitting planes
|> |> at each concave edge, then find the combination of convex pieces that
|> |> maximizes the volume and is convex. Not very efficient (and maybe not even
|> |> correct) but, as usual, this is just off the top of my head.
|> |> 
|> 
|> I don't think this will work in general (if I understand you correctly).
|> Try it with this example:
|> 
|>                                 ____________________
|>                                 |                   |
|>                                 |                   |
|>  minute sharp indentation -->   >                   |  
|>                                 |                   |
|>                                 |___________________|
|>  

Yep, you are right. It still seems though that any splitting plane must
contain a concave edge ... maybe the thing to do is pick ones that
maximize the volume on one side ... sounds like a linear programming type
problem although we're dealing with concave polyhedra here so I'd guess
one couldn't use LP.

This problem sounds vaguely like a problem I saw in a computational geometry
course I took a while ago ... but I can't remember the approach or whether it
was in fact the same problem.

Larry Edwards
Newsgroups: comp.graphics
From: cspas029@sus.edu.eur.nl (R. Slotboom)
Subject: Re: VIVID raytracer ?
Organization: EUR
Date: Fri, 6 Nov 1992 19:48:44 GMT

>>I think POV is quicker too.

>Yes, POV is quicker as long as the number of primitives in the scene
>is small enough to count on your fingers and you don't use
>antialiasing.  Instead of rendering 3 spheres over a checkerboard
>and declaring POV quicker try 3000 or even 30,000 primitives.

>Stephen Coy
>coy@ssc-vax.boeing.com

Okay, I'll add something to this, I have been using Vivid for quite a while
now, and recently discovered POV. I agree that Vivid looks somehow more 'real'
. But what I really liked about POV is the enormous possibililtys te parser 
offers. 'Cause even simple shapes like an elips(oid) are (nearly) impossible to create in Vivid . Also the manipulation of bitmaps, use of fractals and the use of a color map for  textures is great.

For instance, I tried to get a decent cloud texture but it simply does not look so random as a cloud texture in POV does and there are too much clouds in my vivid cloud texture.

I Really am considering registering Vivid so that it will fully use my 
486's ability's but I would like to know if there will be a kind of 
Vivid 3.0 which will offer some of POVs abilitys (Although vivid 2.0 was a big improvement already.)

Kind Regards,

Remco Slotboom,

Newsgroups: comp.graphics,comp.sys.dec,comp.os.ultrix
From: kardaras@en.ecn.purdue.edu (George S Kardaras)
Subject: PHIGS question
Organization: Purdue University Engineering Computer Network
Date: Mon, 9 Nov 92 02:53:18 GMT


Hello,

I develloped an interface code which allows me to access and use
the C language functions of PHIGS through LISP. 

There seems to be a small problem, though: I have a program in C
that works perfectly well that I "translated" in LISP, but the
latter gets stuck whenever I use psetviewrep3 in which case it 
gives me an error message saying:


%PHIGS-E-ERROR_152, Invalid viewport: one or more of the minimum limits 
Exceeds its corresponding maximum limit in routine psetviewrep3


I checked for the viewport values and they get set to the ones given in
the C program correctly. 

Any help is appreciated.

Thanks in advance,
George S. Kardaras
Newsgroups: comp.graphics
From: lauusitalo@tnclus.tele.nokia.fi
Subject: Re: Problems with 3D studio
Organization: Nokia Telecommunications.
Date: Fri, 13 Nov 1992 07:58:46 GMT

In article <1992Nov12.170940.1@ualr.edu>, djlewis@ualr.edu writes:

> I don't have your answer, BUT another great loss is that 3DS won't do 
> reflective ( mirror like) surfaces. At least I havn't found the trick. ..
> djlewis@ualr.edu
> 
        Release 2 does. stop.

lauri
From: shepa@sersun1 (Shepherd A J)
Newsgroups: comp.graphics
Subject: Graphic File Formats
Date: 10 Nov 92 10:32:53 GMT
X-Newsreader: TIN [version 1.1 PL6]


Can anyone let me know where I could get hold of information on various
graphic file formats? 

TIFF, GIF, BMP, MAC, PCX or whatever. Especially TIFF though.

	Thanks muchly.
--
And the dandy isn't sure,		| Antony J. "Doppelganger" Shepherd
If there's a cure for his malaise,	| shepa@essex.ac.uk
Another pie in the face,		| ---------------------------------
Another time, and another place...	| "Dandy in Disguise" - Steve Wynn
Newsgroups: comp.graphics
From: pmoore@hemel.bull.co.uk (Paul Moore)
Subject: vectorization algorithms or source
Organization: Bull HN UK
Date: Thu, 12 Nov 92 13:32:54 GMT

I'm looking for algorithms or code to vectorize raster images.

Plus does anybody have any portable source for reading TIFF?
Newsgroups: comp.graphics
From: jfr@tellabs.com (John Ryder)
Subject: Help needed with 24-bit SVGA board using Cirrus chip (Boca / STB)
Organization: Tellabs, Lisle,IL
Distribution: usa
Date: Tue, 10 Nov 1992 18:51:04 GMT


Hello Out There,

I`m having some problems with a 24-bit color board that I installed in my
PC last week. Actually, I've tried two different cards, but both use the same
video DAC. The first board I tried was the STB Evolution VGA card with 1 MB
ram. I took it back because the Windows 3.0 drivers didn't work, the amount
of memory reported by the card often said 256K instead of 1024K, and many
of the programs that I have that support VESA modes didn't work with this
card, even though it's supposed to be VESA-compliant. I then went out and
bought a Boca Super X VGA card. After getting home, I discovered it also uses
the Cirrus GD-54XX (not sure of number here) chip. Though this card is more
reliable in reporting the amount of memory present, it still doesn't work at
all or works incorrectly in standard VESA modes like 640x480x256. Either that
or VESA compatible programs keep telling me that my card does not support
the mode I'm trying to use. This card replaced a Video 7 1024I card that 
worked fine in these modes. I did have to load a TSR driver for VESA
modes to work with the Video 7 board. However, there were no similar drivers
included with either the STB or the Boca board. 

Does anyone else out there have either of these cards? I'd be interested in 
hearing if you are having similar problems. It's great having 24-bit color
capabilities, but the quirky operation of the card in general is driving me
up a wall. I'd be grateful for any hekp anyone can offer.

John Ryder / Tellabs
jfr@tellabs.com   ..uunet!tellab5!jfr



Newsgroups: comp.graphics,comp.graphics.animation
From: nokon@hercules.cs.uregina.ca (Ted Nokonechny)
Subject: Utility needed for conversion
Date: Wed, 11 Nov 1992 08:01:32 GMT
Organization: University of Regina, SK, Canada

Problem:
	I have an image stored as an N by N array of unsigned char, which
I would like to convert into some standard image format compatible with
MSDOS and my Hercules monchrome monitor. Does anyone know of a utility which
will convert my raw image into say GIF format ( or others )?

Please post or e-mail directly.

Ted Nokonechny
nokon@hercules.cs.uregina.ca

Newsgroups: comp.graphics
From: alfred@omcron.uleth.ca (James Alfred)
Subject: Help on Colorization techniques
Organization: University of Lethbridge
Date:  7 Nov 92 03:24:37 GMT


Hi,

I hope this won't take up much of your time but I have a question.  I am
new to computer graphics and I am currently doing a project that will
colorize an image from a CCD camera.  I intend to do this by having 3
image files (RED,BLUE,GREEN) by putting a filter in front of the lens
and then saving the frame onto a file.  I'll use these values to drive 
the RGB for a pixel.   My question is how could I get to the RGB of each
pixel from C or C++ ?  Any other suggestions most welcome.

Please reply by e-mail.

Thank you for your time


James
From: jones@ils.nwu.edu
Newsgroups: comp.cog-eng
Subject: New Ph.D. Program
Date: 9 Nov 92 19:59:42 GMT
Organization: institute for the learning sciences

T h e   L  E  A  R  N  I  N  G    S  C  I  E  N  C  E  S    P h. D.   P r o g r
a m


Preparing individuals for productive work and a   high quality of life in
today's society is a complex  challenge for schools and corporations. To meet
this challenge, Northwestern University has established a unique Ph.D. program
in the Learning Sciences. Its purpose is to advance the research and
development of innovative educational structures and technologies.

Research in the Learning Sciences is aimed at creating environments that offer
all students a rich variety of opportunities for learning to think effectively,
both within and outside of formal learning settings. Graduate student and
faculty research efforts are supported by a multimedia, networked computing 
infrastructure and an unusual commitment to developing technologies that
function effectively within their intended settings. 

The Learning Sciences is a synthesis of computational and social science
disciplines including artificial intelligence, cognitive and developmental
psychology, educational research, linguistics, computer science, anthropology
and fields that develop strategies for teaching complex subject matter. 

Through research, field work and apprenticeships, the Ph.D. program will
prepare its graduates to assume leadership roles in advancing the scientific
understanding and systematic practices of learning and teaching.

Students are eligible for competitively-awarded multi-year funding. To qualify
for financial aid, candidates should apply by January 15, 1992. Applications
received after that date may be  considered. Individuals with relevant teaching
experience or a strong academic  background in a field related to the Learning
Sciences are encouraged to apply. For  application materials or for further
information, contact:

Professor Roy Pea
Ph.D. Program Chair 
The Learning Sciences 
Northwestern University
1890 Maple Avenue
Evanston, IL  60201
phone: 708-491-8152
fax:    708-491-5258
email: jones@ils.nwu.edu
From: japancs@cs.arizona.edu (Japan CS Project)
Newsgroups: comp.research.japan
Subject: Scientific Information Bulletin, Vol. 17, No. 2 (1992)
Date: 6 Nov 92 01:20:55 GMT


------------------------------------------------------------------------
     SCIENTIFIC INFORMATION BULLETIN, VOL. 17, NO. 2 (1992)

            published by

     OFFICE OF NAVAL RESEARCH ASIAN OFFICE     (in English)
------------------------------------------------------------------------

[Collection and dissemination of this information supported in part by
 ONR Grant N0001492J1737.]



CONTENTS

Scientific Information Briefs 	                                   	1

Computer Science

Various Computing Activities in Taiwan                           	9
     David K. Kahaner
          The International Symposium on Algorithms '91 and visits to
          Academia Sinica and the National Center for High Performance
          Computing in Taiwan are summarized.

Japan Atomic Energy Research Institute (JAERI)                    	15
     David K. Kahaner
          Computer-related research at JAERI is summarized.

Advanced Telecommunication Research Institute (ATR)              	19
     David K. Kahaner
          This is an update of an earlier article on ATR

Neurocomputing at Mitsubishi Electric                           	25
     David K. Kahaner
          This article profiles Mitsubishi Electric and describes the
          work in its Neurocomputing and Optoelectronics Group in Osaka.

International Symposium on Three-Dimensional Image Technology and Arts 	29
     David K. Kahaner
          Three-dimensional imaging from computers and film is reviewed.
From: japancs@cs.arizona.edu (Japan CS Project)
Newsgroups: comp.research.japan
Subject: Scientific Information Bulletin, Vol. 16, No. 4 (1991)
Date: 6 Nov 92 01:19:23 GMT


------------------------------------------------------------------------
     SCIENTIFIC INFORMATION BULLETIN, VOL. 16, NO. 4 (1991)

            published by

     OFFICE OF NAVAL RESEARCH ASIAN OFFICE     (in English)
------------------------------------------------------------------------

[Collection and dissemination of this information supported in part by
 ONR Grant N0001492J1737.]


CONTENTS

Scientific Information Briefs                                            1 

Computer Science

Computing in Hong Kong                                                   7
     David K. Kahaner
	Computing activities in Hong Kong are described.

Fuzzy Helicopter Flight Control                                 	13
     David K. Kahaner and Daniel G. Schwartz
	This article summarizes research on helicopter flight control
        in Japan based on fuzzy logic techniques.

Computing and Related Science and Technology Activities in China 	17
     David K. Kahaner
        An overview of computing and related science and technology
        activities in China is provided.

The Second International Conference on Numerical Optimization           25
  and Its Applications 	
     David K. Kahaner and Stephen G. Nash
        This article summarizes the conference and describes visits
        to the computing center at the Chinese Academy of Sciences
        (Beijing) and to Fudan University (Shanghai).

Artificial Intelligence Based Measurement and Control           	33
     David K. Kahaner
        The Eighth International Symposium on Artificial Intelligence
        Based Measurement and Control is summarized.

Mitsubishi Electric Corporation: Its Basic Research Focus       	39
     David K. Kahaner
        Some of Mitsubishi's research directions are discussed.

Virtual Reality                                                         43
     David K. Kahaner
	Comments on virtual/artificial reality research in Japan
       	are presented.

Computing and Related Science in Australia                              47
     David K. Kahaner
	This article discusses high performance computing in
       	Australia.