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1992-09-13
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"Light Makes Right"
January 2, 1990
Volume 3, Number 1
Compiled by Eric Haines, 3D/Eye Inc, 2359 Triphammer Rd, Ithaca, NY 14850
NOTE ADDRESS CHANGE: wrath.cs.cornell.edu!eye!erich
[distributed by Michael Cohen <m-cohen@cs.utah.edu>, but send
contributions and subscriptions requests to Eric Haines]
All contents are US copyright (c) 1989,1990 by the individual authors
Archive locations: anonymous FTP at cs.uoregon.edu (128.223.4.1) and at
freedom.graphics.cornell.edu (128.84.247.85), /pub/RTNews
Other sites: uunet.uu.net:/graphics
Contents:
Introduction
New People
Archive Site for Ray Tracing News, by Kory Hamzeh
Ks + T > 1, by Craig Kolb and Eric Haines
Quartic Roots, and "Intro to RT" Errata, by Larry Gritz and Eric Haines
More on Quartics, by Larry Spence
Question: Kay and Kajiya Slabs for Arbitrary Quadrics?
by Thomas C. Palmer
Ambient Term, by Pierre Poulin
Book Reviews on Hierarchical Data Structures of Hanan Samet,
by A. T. Campbell, III
Comparison of Kolb, Haines, and MTV Ray Tracers, Part I, by Eric Haines
Raytracer Performance of MTV, by Steve Lamont
BRL-CAD Ray Tracer Timings, by Gavin Bell
BRL-CAD Benchmarking and Parallelism, by Mike Muuss
======== USENET cullings follow ========
Rayshade Patches Available, by Craig Kolb
Research and Timings from IRISA, by Didier Badouel
Concerning Smart Pixels, by John S. Watson
Input Files for DBW Render, by Tad Guy
Intersection with Rotated Cubic Curve Reference, by Richard Bartels
Needed: Quartz surface characteristics, by Mike Macgirvin
Solution to Smallest Sphere Enclosing a Set of Points, by Tom Shermer
True Integration of Linear/Area Lights, by Kevin Picott
-------------------------------------------------------------------------------
Introduction
This issue's focus is on timings from various people using a wide
selection of hardware and software. Much of the delay in getting out this
issue was my desire to finish up my own timing tests of MTV's, Kolb's, and my
own ray tracers on the same machine. I hope some of you will find this
information of use.
Another feature of this issue is a pair of book reviews. One of the
purposes of the RT News is to provide people with sources of information
relevant to ray tracing. So, I would like to see more reviews, or even just
brief descriptions of articles and books that you come across. Keeping up to
date in this field is going to take more time as the years go by, so please do
pass on any good finds you may have. Also, if you're an author, please feel
free to send a copy of the abstract here for publication. This service is
already provided to a certain extent by SIGGRAPH for thesis work. However,
even a duplication of their efforts is worthwhile, since an electronic version
is much easier to search and manipulate.
Finally,
-------------------------------------------------------------------------------
New People
# Kory Hamzeh
# 6640 Nevada Ave.
# Canoga Park, Ca 91303
# Email: UUCP: avatar!kory or ..!uunet!psivax!quad1!avatar!kory
# INTERNET: avatar!kory@quad.com
alias kory_hamzeh quad.com!avatar!kory
I'm not professionally involved in ray tracing. Just personally fascinated by
it. I have written a couple of ray tracers (who hasn't yet?) and I'm in the
midst of designing a 24 bit frame buffer. Since I don't do this on a
professional level, I lack some of the resources required to develop real
products. I maintain a archive site with a lot of graphics related items
(including Ray Tracing News). If you need to access the archive (anonymous
uucp only) please send me mail.
--------
#
# Steve Lamont, sciViGuy - parallelism
# NCSC,
# Box 12732,
# Research Triangle Park, NC 27709
alias steve_lamont cornell!spl%mcnc.org
--------
# Bob Kozdemba - novice tracer, futures, also radiosity
# Hewlett-Packard Co.
# 7641 Henry Clay Blvd.
# Liverpool, NY 14450
# (315-451-1820 x265)
alias bob_kozdemba hpfcla!hpfcse!hpurvmc!koz
I work for HP in Syracuse, NY as a systems engineer. I will be attending SU
starting in Jan. `89 working toward my BS with a focus in computer graphics.
My job responsibilities are to provide technical support to customers and
sales in the areas of Starbase graphics and X Windows. Lately I have been
experimenting with HP's SBRR product [radiosity and ray tracing part of the HP
graphics package] and trying to keep abreast of futures in graphics. I have
written an extremely primitive ray tracer and I am looking for ideas on how to
implement reflections and transparency.
--------
# Robert Goldberg
# Queens College of CUNY
# Comp. Sci. Dep't
# 65-34 Kissena Blvd.
# Flushing, N.Y. 11367-0904
# Work : 3d Modeling algorithms, with appl. to graphics and image processing
# Phone: Work - (718) 520-5100
alias robert_goldberg rrg@acf8.nyu.edu
--------
# John Olsen - refraction, radiosity, antialiasing, stereo images.
# Hewlett-Packard, Mail Stop 73
# 3404 E. Harmony Road
# Ft Collins, CO 80525
# (303) 229-6746
# email: olsen@hq.HP.COM, hplabs!hpfcdq!olsen
alias john_olsen hpfcdq.hp.com!olsen
Currently, I've been spending some time tinkering with the DBWrender ray
tracer making it produce 24 bit/pixel QRT-format images. I like the QRT
output format, but I like some of the features of DBWrender, such as
antialiasing and fading to a background color.
I've thought about writing my own ray tracer with all the features I want, but
so far I've resisted this evil temptation, and only looked for fancier ones
already done by others who could not resist the temptation. :^)
I've just installed an alias for a local ray tracing news distribution. You
can send it to raylist@hpfcjo.HP.COM (or if you can't reach, try something
like hplabs!hpfcdq!hpfcjo!raylist).
--------
# Andrew Hunt, andrew@erm.oz
# Earth Resource Mapping, 130 Hay St, Subiaco, Western Australia 6008
# Phone: +61 9 388 2900 Fax: +61 9 388 2901
# ACSnet: andrew@erm.oz
alias andrew_hunt uunet!munnari!erm.erm.oz.au!andrew
In 1987 I implemented a "Three Dimensional Digital Differential Analyser"
(3D-DDA) algorithm, along the lines of Fujimoto and Iwata`s, and used it to
speed up a raytracing system under development at the Computer Science
Department at Curtin University of Technology.
Recently I have got a bit busy developing commercial image processing software
to devote much time to Ray Tracing.
Sometime during 1990 I plan to try to port our Ray Tracing system to a
Transputer based platform.
--------
# Nick Beadman - Distributed Ray Tracing, Efficiency
# School of Information Systems
# University of East Anglia
# Norwich
# Norfolk
# United Kingdom
alias nick_beadman cmp7112@sys.uea.ac.uk
At the moment I'm trying to implement a distributed ray tracer on 8 t800s on a
meiko computing surface using C, with little success I should add. It all
part of a big third year computing project worth a sixth of my degree.
--------
# Peter Miller - algorithms, realism
# 18 Daintree Cr
# Kaleen ACT 2617
# AUSTRALIA
# CONTACT LIST ONLY: subscription through melbourne
#Phone: +61-62-514611 (W)
# +61-62-415117 (H)
# UUCP {uunet,mcvax,ukc}!munnari!neccan.oz!pmiller
# ARPA pmiller%neccan.oz@uunet.uu.net
# CSNET pmiller%neccan.oz@australia
# ACSnet pmiller@neccanm.oz
alias peter_miller cornell!uunet!munnari!neccan.necisa.oz.au!peter
I have been interested in ray tracing since 1984, when I wrote a ray tracer
before I knew it was called ray tracing! Since then I have been reading
journals and tinkering with my ray tracer.
The last 3 years were sp