home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.graphics:8911 news.answers:2535
- Newsgroups: comp.graphics,news.answers
- Path: sparky!uunet!stanford.edu!ames!elroy.jpl.nasa.gov!ufo!grieggs
- From: grieggs@jpl-devvax.jpl.nasa.gov (John T. Grieggs)
- Subject: (17aug92) comp.graphics Frequently Asked Questions (FAQ)
- Message-ID: <1992Aug17.194222.3588@jpl-devvax.jpl.nasa.gov>
- Followup-To: poster
- Sender: grieggs@jpl-devvax.jpl.nasa.gov (John T. Grieggs)
- Reply-To: grieggs <grieggs@jpl-devvax.jpl.nasa.gov>
- Organization: Jet Propulsion Laboratory, Pasadena, CA
- Date: Mon, 17 Aug 1992 19:42:22 GMT
- Approved: news-answers-request@MIT.edu
- Expires: Mon, 31 Aug 1992 19:42:23 GMT
- Lines: 625
-
- Archive-name: graphics/faq
-
- This message is automatically posted once a week in an effort to cut
- down on the repetitive junk in comp.graphics. It was last changed on
- 17aug92. If you have answers to other frequently asked questions that
- you would like included in this posting, please send me mail. If you
- don't want to see this posting every week, please add the subject line
- to your kill file. Thank you.
- ---
- _john
-
- John Grieggs grieggs@jpl-devvax.jpl.nasa.gov JohnG@portal.com
- ---
- Last update: 08/17/92
-
- The FAQ continues to be brought up to date, based on e-mailed input from
- a variety of comp.graphics participants.
-
- I do read the newsgroup, and if I happen to notice that some Question is
- Frequently Asked but not covered in my FAQ, I will most likely seek out an
- answer and add it. What I will not do is wade through 50-message flame
- threads looking for kernels of possible updates - contributions will be
- accepted via e-mail ONLY.
-
- I am hoping for the following contributions currently:
-
- A good reference and a good, short answer for "How to ray trace
- height fields". This has been asked several times, and I'd like
- to know too. :-)
-
- Specific literature refs for "Drawing three-dimensional objects
- on a two-dimensional screen". I am hoping for something like "see
- Baldersnath and Whitefield, pp 167-213". Specific, that is.
-
- Opinions on which current books should be added to the FAQ - I
- would especially like to add one or more of the many file format
- books which have been appearing lately. Which is the best? Also,
- are there any others currently in the general reference list which
- should be nuked due to their hoary old age and obsolesence?
-
- Rayshade mailing list (ddebry@dsd.es.com).
-
- IP address added for coral.cs.jcu.edu.au (len@mel.dit.csiro.au).
-
- Eric Haines ray tracing and radiosity/global illumination bibs (erich@eye.com).
-
- Tom Wilson's ray tracing abstracts (wilson@eola.cs.ucf.edu).
-
- Lightwave mailing list (erich@eye.com).
-
- Comments on Pixar video availability (ab@nova.cc.purdue.edu).
-
- John Bradley's "Diversity Algorithm" (joseph@joebloe.maple-shade.nj.us).
-
- General re-formatting and tweaking (me).
-
- grieggs@jpl-devvax.jpl.nasa.gov
-
-
-
- Contents:
-
- 1) General references for graphics questions.
- 2) Drawing three-dimensional objects on a two-dimensional screen.
- 3) Quantizing 24 bit images down to 8 bits.
- 4) Converting color into grayscale.
- 5) Quantizing grayscale to black&white.
- 6) Rotating a raster image by an arbitrary angle.
- 7) Free image manipulation software.
- 8) Format documents for GIF, TIFF, IFF, BIFF, NFF, OFF, FITS, etc.
- 9) Converting between vector formats.
- 10) How to get Pixar films.
- 11) How do I draw a circle as a Bezier (or B-spline) curve?
- 12) How to order standards documents.
- 13) How to FTP by email.
- 14) How to tell whether a point is within a planar polygon.
- 15) How to tessellate a sphere.
- 16) Specific references on ray-tracing and global illumination.
- 17) SIGGRAPH information online
- 18) SIGGRAPH Panels Proceedings available
- 19) Graphics mailing lists
-
-
- 1) General references for graphics questions:
-
- Computer Graphics: Principles and Practice (2nd Ed.), J.D. Foley,
- A. van Dam, S.K. Feiner, J.F. Hughes, Addison-Wesley 1990, ISBN
- 0-201-12110-7
- Procedural Elements for Computer Graphics, David F. Rogers, McGraw
- Hill 1985, ISBN 0-07-053534-5
- Mathematical Elements for Computer Graphics 2nd Ed., David F. Rogers
- and J. Alan Adams, McGraw Hill 1990, ISBN 0-07-053530-2
- Applied Concepts in Microcomputer Graphics, Bruce Artwick, Prentice-Hall
- 1984, ISBN 0-13-039322-3
- Digital Picture Processing, vols. 1&2, Azriel Rosenfeld and Avi Kak,
- Academic Press 1976
- Three Dimensional Computer Graphics, Alan Watt, Addison-Wesley 1990, ISBN
- 0-201-15442-0
- An Introduction to Ray Tracing, Andrew Glassner (ed.), Academic Press
- 1989, ISBN 0-12-286160-4
- Graphics Gems, Andrew Glassner (ed.), Academic Press 1990, ISBN
- 0-12-286165-5
- Graphics Gems II, James Arvo (ed.), Academic Press 1991, ISBN
- 0-12-64480-0
- Graphics Gems III, David Kirk (ed.), Academic Press 1992, ISBN
- 0-12-409670-0 (with IBM disk) or 0-12-409671-9 (with Mac disk)
-
- An automatic mail handler at Brown University allows users of "Computer
- Graphics: Principles and Practice," by Foley, van Dam, Feiner, and
- Hughes, to obtain text errata and information on distribution of the
- software packages described in the book. Also, users can send the
- authors feedback, to report text errors and software bugs, make
- suggestions, and submit exercises. To receive information describing
- how you can use the mail handler, simply mail graphtext@cs.brown.edu
- and put the word "Help" in the Subject line. Use the Subject line
- "Software-Distribution" to receive information specifically concerning
- the software packages SRGP and SPHIGS.
-
- Errata for "An Introduction to Ray Tracing" is available on
- wuarchive.wustl.edu in graphics/graphics/books/IntroToRT.errata.
-
- All C code from the "Graphics Gems" series is available via anonymous ftp
- from princeton.edu. Look in the directory pub/Graphics/GraphicsGems for
- the various volumes (Gems, GemsII, GemsIII), and get the README file first.
-
-
- 2) Drawing three-dimensional objects on a two-dimensional screen.
-
- The simple answer is, you divide by the depth. For a more verbose
- explanation, see any of the above references.
-
-
- 3) Quantizing 24 bit images down to 8 bits.
-
- Find a copy of "Color Image Quantization for Frame Buffer Display" by
- Paul Heckbert, SIGGRAPH '82 Proceedings, page 297. There are other
- algorithms, but this one works well and is fairly simple. Implementations
- are included in most raster toolkits (see item 7 below).
-
- A variant method is described in "Graphics Gems", p. 287-293. Note that
- the code from the "Graphics Gems" series is all available from an FTP site,
- as described above.
-
- Check out John Bradley's "Diversity Algorithm", which is incorporated into
- the xv package and described in the back of the manual.
-
-
- 4) Converting color into grayscale.
-
- The NTSC formula is:
-
- luminosity = .299 red + .587 green + .114 blue
-
-
- 5) Quantizing grayscale to black&white.
-
- The only reference you need for this stuff is:
-
- Digital Halftoning, Robert Ulichney, MIT Press 1987, ISBN 0-262-21009-6
-
- But before you go off and start coding, check out the image manipulation
- software mentioned in item 7 below. All of the packages mentioned can do
- some form of gray to b&w conversion.
-
-
- 6) Rotating a raster image by an arbitrary angle.
-
- The obvious but wrong method is to loop over the pixels in the source
- image, transform each coordinate, and copy the pixel to the destination.
- This is wrong because it leaves holes in the destination. Instead,
- loop over the pixels in the destination image, apply the *reverse*
- transformation to the coordinates, and copy that pixel from the source.
- This method is quite general, and can be used for any one-to-one
- 2-D mapping, not just rotation. You can add anti-aliasing by doing
- sub-pixel sampling.
-
- However, there is a much faster method, with antialising included,
- which involves doing three shear operations. The method was originally
- created for the IM Raster Toolkit (see below); an implementation is
- also present in PBMPLUS. Reference: "A Fast Algorithm for Raster
- Rotation", by Alan Paeth (awpaeth@watcgl.waterloo.edu) Graphics
- Interface '86 (Vancouver). An article on the IM toolkit appears in
- the same journal. An updated version of the rotation paper appears
- in "Graphics Gems" (see section [1]) under the original title.
-
-
- 7) Free image manipulation software.
-
- There are a number of toolkits for converting from one image format to
- another, doing simple image manipulations such as size scaling, plus
- the above-mentioned 24 -> 8, color -> gray, gray -> b&w conversions.
- Here are pointers to some of them:
-
- PBMPLUS, by Jef Poskanzer. Comprehensive format conversion and image
- manipulation package. The latest version is always available via
- anonymous FTP as ftp.ee.lbl.gov:pbmplus*.tar.Z,
- wuarchive.wustl.edu:graphics/graphics/packages/pbmplus/pbmplus*.tar.Z,
- and export.lcs.mit.edu:contrib/pbmplus*.tar.Z.
-
- IM Raster Toolkit, by Alan Paeth (awpaeth@watcgl.uwaterloo.ca).
- Provides a portable and efficient format and related toolkit. The
- format is versatile in supporting pixels of arbitrary channels,
- components, and bit precisions while allowing compression and machine
- byte-order independence. The kit contains more than 50 tools with
- extensive support of image manipulation, digital halftoning and format
- conversion. Previously distributed on tape c/o the University of
- Waterloo, an FTP version will appear someday.
-
- Utah RLE Toolkit. Conversion and manipulation package, similar to
- PBMPLUS. Available via FTP as cs.utah.edu:pub/urt-*,
- princeton.edu:pub/Graphics/urt-*, and freebie.engin.umich.edu:pub/urt-*.
-
- Fuzzy Pixmap Manipulation, by Michael Mauldin <mlm@nl.cs.cmu.edu>.
- Conversion and manipulation package, similar to PBMPLUS. Version 1.0
- available via FTP as nl.cs.cmu.edu:/usr/mlm/ftp/fbm.tar.Z,
- uunet.uu.net:pub/fbm.tar.Z, and ucsd.edu:graphics/fbm.tar.Z.
-
- Img Software Set, by Paul Raveling <raveling@venera.isi.edu>. Reads and
- writes its own image format, displays on an X11 screen, and does some
- image manipulations. Version 1.3 is available via FTP as
- export.lcs.mit.edu:contrib/img_1.3.tar.Z, and
- venera.isi.edu:pub/img_1.3.tar.Z along with a large collection of color
- images.
-
- Xim, by Philip R. Thompson. Reads and writes its own image format,
- displays on an X11 screen, and does some image manipulations.
- Available in your nearest X11R4 source tree as contrib/clients/xim.
- A more recent version is available via ftp from video.mit.edu. It uses
- x11r4 and the OSF/Motif toolkit to provide basic interactive image
- manipulation and reads/writes GIF, xwd, xbm, tiff, rle, xim, and other
- formats.
-
- xloadimage, by Jim Frost <madd@std.com>. Reads in images in various
- formats and displays them on an X11 screen. Available via FTP as
- export.lcs.mit.edu:contrib/xloadimage*, and in your nearest comp.sources.x
- archive.
-
- TIFF Software, by Sam Leffler <sam@okeeffe.berkeley.edu>. Nice
- portable library for reading and writing TIFF files, plus a few tools
- for manipulating them and reading other formats. Available via FTP as
- ucbvax.berkeley.edu:pub/tiff/*.tar.Z or uunet.uu.net:graphics/tiff.tar.Z
-
- xtiff, an X11 tool for viewing a TIFF file. It was written to handle
- as many different kinds of TIFF files as possible while remaining
- simple, portable and efficient. xtiff illustrates some common problems
- with building pixmaps and using different visual classes. It is
- distributed as part of Sam Leffler's libtiff package and it is also
- available on export.lcs.mit.edu, uunet.uu.net and comp.sources.x.
- xtiff 2.0 was announced in 4/91; it includes Xlib and Xt versions.
-
- ALV, a Sun-specific image toolkit. Version 2.0.6 posted to
- comp.sources.sun on 11dec89. Also available via email to
- alv-users-request@cs.bris.ac.uk.
-
- popi, an image manipulation language. Version 2.1 posted to
- comp.sources.misc on 12dec89.
-
- ImageMagick, an X11 package for display and interactive manipulation
- of images. Uses its own format (MIFF), and includes some converters.
- Available via FTP as export.lcs.mit.edu:contrib/ImageMagick.tar.Z
-
- Khoros, a huge (~100 meg) graphical development environment based on
- X11R4. Khoros components include a visual programming language, code
- generators for extending the visual language and adding new application
- packages to the system, an interactive user interface editor, an
- interactive image display package, an extensive library of image and
- signal processing routines, and 2D/3D plotting packages. Available via
- FTP as pprg.eece.unm.edu:pub/khoros/*.
-
- LaboImage, a SunView-based image processing and analysis package. It
- includes more than 200 image manipulation, processing and measurement
- routines, on-line help, plus tools such as an image editor, a color
- table editor and several biomedical utilities. Available via anonymous
- FTP as ads.com:pub/VISION-LIST-ARCHIVE/SHAREWARE/LaboImage_3.1.tar.Z
-
- The San Diego Supercomputer Center Image Tools, software tools for
- reading, writing, and manipulating raster images. Binaries for some
- machines available via anonymous FTP in sdsc.edu:sdscpub.
-
- The Independent JPEG Group has written a package for reading and
- writing JPEG files. FTP to uunet.uu.net:graphics/jpeg/jpegsrc.v?.tar.Z
-
- Don't forget to set binary mode when you FTP tar files. For you MILNET
- folks who still don't have name servers, the IP addresses are:
-
- ads.com 128.229.30.16
- cs.utah.edu 128.110.4.21
- coral.cs.jcu.edu.au 137.219.17.4
- export.lcs.mit.edu 18.24.0.12
- freebie.engin.umich.edu 141.212.103.21
- ftp.ee.lbl.gov 128.3.112.20
- gondwana.ecr.mu.oz.au 128.250.1.63
- karazm.math.uh.edu 129.7.7.6
- nic.funet.fir 128.214.6.100
- nl.cs.cmu.edu 128.2.222.56
- pprg.eece.unm.edu 129.24.24.10
- princeton.edu 128.112.128.1
- sdsc.edu 132.249.20.22
- ucbvax.berkeley.edu 128.32.133.1
- venera.isi.edu 128.9.0.32
- wuarchive.wustl.edu 128.252.135.4
- zamenhof.cs.rice.edu 128.42.1.75
-
- Please do *not* post or mail messages saying "I can't FTP, could someone
- mail this to me?" There are a number of automated mail servers that will
- send you things like this in response to a message. See item 13 below for
- details on some.
-
- Also, the newsgroup alt.graphics.pixutils is specifically for discussion
- of software like this. You may find useful information there.
-
-
- 8) Format documents for GIF, TIFF, IFF, BIFF, NFF, OFF, FITS, etc.
-
- You almost certainly don't need these. Read the above item 7 on free
- image manipulation software. Get one or more of these packages and
- look through them. Chances are excellent that the image converter you
- were going to write is already there. But if you still want one of the
- format documents, many such files are available by anonymous ftp from
- zamenhof.cs.rice.edu in directory pub/graphics.formats.
-
- These files were collected off the net and are believed to be correct.
- This archive includes pixel formats, and two- and three-dimensional object
- formats. The future of this archive is uncertain at the moment, as Mark
- Hall <foo@cs.rice.edu> will apparently no longer be maintaining it.
-
- FITS stands for Flexible Image Transport System, it's an image file
- format most often used in astronomy. Refer to the sci.space FAQ for
- more information if needed.
-
-
- 9) Converting between vector formats.
-
- A lot of people ask about converting from HPGL to PostScript, or MacDraw
- to CGM, or whatever. It is important to understand that this is a very
- different problem from the image format conversions in item 7. Converting
- one image format to another is a fairly easy problem, since once you
- get past all the file header junk, a pixel is a pixel -- the basic objects
- are the same for all image formats. This is not so for vector formats.
- The basic objects -- circles, ellipses, drop-shadowed pattern-filled
- round-cornered rectangles, etc. -- vary from one format to another.
- Except in extremely restricted cases, it is simply not possible to do
- a one-to-one conversion between vector formats.
-
- On the other hand, it is quite possible to do a close approximation,
- rendering an image from one format using the primitives from another.
- As far as I know, no one has put together a general toolkit of such
- converters, but two different HPGL to PostScript converters have been
- posted to comp.sources.misc. Check the index on your nearest archive
- site.
-
- A related frequent question is how to convert from some vector format
- to a bitmapped image - from PostScript to Sun raster format, or HPGL to
- X11 bitmap. For example, some of the commercial PostScript clones for
- PC's allow you to render to a disk file as well as a printer. Also,
- the PostScript interpreters in the NeXt box and in Sun's X11/NeWs can
- be used to render to a file if you're clever. But in general, the
- answer is no. However, if someone were to put together a vector to
- vector conversion toolkit, adding a vector to raster converter would be
- trivial.
-
-
- 10) How to get Pixar films.
-
- The various John Lasseter / Pixar computer animated shorts are available
- on video tape. You can order them from Direct Cinema Limited:
-
- Film Individual Price Institutional Price
- Luxo, Jr. $14.95 $50.00
- Red's Dream $19.95 $75.00
- Tin Toy $24.95 $75.00
- Knickknack $24.95 $75.00
- Luxo, Jr./Red's Dream/Tin Toy $39.95 $100.00
-
- All tapes are on 1/2" VHS NTSC. Add $10/tape for PAL format. Also
- available:
-
- Tin Toy T-shirt $15.00
- Knickknack 3D T-shirt $15.00 (includes glasses)
-
- For individual orders, add $5 S&H for the first tape or shirt, $2 for
- each additional tape or shirt. For institutional orders, add $5 S&H
- for the first tape, $3 for each additional tape. Foreign shipping, add
- $3/tape or shirt. Call 800-525-0000 (213-396-4774 international,
- 213-396-3233 FAX) to charge to your credit card. Call first to verify
- prices and availability. Or, just write to:
-
- Direct Cinema Limited
- 1749 14th Street
- Santa Monica, CA 90404-4342
-
- Allan Braunsdorf has this to say:
-
- At SIGGRAPH they were selling a tape with all four shorts
- for $25. That was a sale price. You can get it for slightly
- more than that normally. ($35 maybe.) I believe it's
- available from RenderMan Retail (at Pixar's address).
-
- Does anyone know this address and the real price?
-
-
- 11) How do I draw a circle as a Bezier (or B-spline) curve?
-
- The short answer is, "You can't." Unless you use a rational spline you
- can only approximate a circle. The approximation may look acceptable,
- but it is sensitive to scale. Magnify the scale and the error of
- approximation magnifies. Deviations from circularity that were not
- visible in the small can become glaring in the large. If you want to
- do the job right, consult the article:
-
- "A Menagerie of Rational B-Spline Circles"
- by Leslie Piegl and Wayne Tiller
- in IEEE Computer Graphics and Applications, volume 9, number 9,
- September, 1989, pages 48-56.
-
- For rough, non-rational approximations, consult the book:
-
- Computational Geometry for Design and Manufacture
- by I. D. Faux and M. J. Pratt,
- Ellis Horwood Publishers, Halsted Press, John Wiley 1980.
-
- For the best known non-rational approximations, consult the article:
-
- "Good Approximation of Circles by Curvature-continuous Bezier Curves"
- by Tor Dokken, Morten Daehlen, Tom Lyche, and Knut Morken
- in Computer Aided Geometric Design, volume 7, numbers 1-4 (combined),
- June, 1990, pages 33-41 [Elsevier Science Publishers (North-Holland)]
-
-
- 12) How to order standards documents.
-
- The American National Standards Institute sells ANSI standards, and also
- ISO (international) standards. Their sales office is at 1-212-642-4900,
- mailing address is 1430 Broadway, NY NY 10018. It helps if you have the
- complete name and number.
-
- Some useful numbers to know:
-
- CGM (Computer Graphics Metafile) is ISO 8632-4 (1987). GKS (Graphical
- Kernel System) is ANSI X3.124-1985. PHIGS (Programmer's Hierarchical
- Interactive Graphics System) is ANSI X3.144-1988. IGES is ASME/ANSI
- Y14.26M-1987. Language bindings are often separate but related numbers;
- for example, the GKS FORTRAN binding is X3.124.1-1985.
-
- Standards-in-progress are made available at key milestones to solicit
- comments from the graphical public (this includes you!). ANSI can let
- you know where to order them; most are available from Global Engineering
- at 1-800-854-7179.
-
-
- 13) How to FTP by email.
-
- There are a number of sites that archive the Usenet sources newsgroups
- and make them available via an email query system. You send a message
- to an automated server saying something like "send comp.sources.unix/fbm",
- and a few hours or days later you get the file in the mail.
-
- In addition, there is at least one FTP-by-mail server. Send mail to
- ftpmail@decwrl.dec.com saying "help" and it will tell you how to use
- it. Note that this service has at times been turned off due to abuse.
-
-
- 14) How to tell whether a point is within a planar polygon.
-
- Consider a ray originating at the point of interest and continuing to
- infinity. If it crosses an odd number of polygon edges along the way,
- the point is within the polygon. If the ray crosses an even number of
- edges, the point is either outside the polygon, or within an interior
- hole formed from intersecting polygon edges. This idea is known in
- the trade as the Jordan curve theorem; see Eric Haines' article in
- Glassner's ray tracing book (above) for more information, including
- treatment of special cases.
-
- Another method is to sum the absolute angles from the point to all
- the vertices on the polygon. If the sum is 2 pi, the point is inside,
- if the sum is 0 the point is outside. However, this method is about an
- order of magnitude slower than the previous method because evaluating the
- trigonometric functions is usually quite costly.
-
- Code for both methods can be had from Eric Haines (erich@eye.com), and will
- appear in the Ray Tracing News, Vol. 5, No. 2, available from princeton.edu:
- pub/Graphics/RTNews/RTNv5n2.Z.
-
-
- 15) How to tessellate a sphere.
-
- One simple way is to do recursive subdivision into triangles. The
- base of the recursion is an octahedron, and then each level divides
- each triangle into four smaller ones. Jon Leech <leech@cs.unc.edu>
- has posted a nice routine called sphere.c that generates the coordinates.
- It's available for FTP on ftp.ee.lbl.gov and princeton.edu.
-
- 16) Specific references on ray-tracing and global illumination.
-
- Rick Speer maintains a cross-indexed ray-tracing bibliography:
-
- Highlights of this edition-
-
- i) more than 500 citations spanning the period from 1968 through
- November '91;
- ii) papers from all Siggraph, Graphics Interface, Eurographics, CG
- International and Ausgraph proceedings through December, '91;
- iii) all citations keyworded for easy lookup;
- iv) cross-indices by keyword and author;
- v) glossary of the 119 keywords used.
-
- The bib is in the form of a PostScript file. The printout is 41 pages long.
- Below is a list of ftp sites and the dirs that contain the file. It's named
- "speer.raytrace.bib.ps.Z" and is compressed at most sites-
-
- Site Dir
- wuarchive.wustl.edu graphics/graphics/bib/RT.BIB.Speer/
- karazm.math.uh.edu pub/Graphics/
- gondwana.ecr.mu.oz.au pub/papers/
- nic.funet.fi pub/sci/papers/graphics
- coral.cs.jcu.edu.au graphics/papers/
-
- Eric Haines (erich@eye.com) maintains ray tracing and radiosity/global
- illumination bibliographies. These are in "refer" format, and so can be
- searched electronically (a simple awk script to search for keywords is
- included with each). The bibliographies are available at most of the
- sites listed above, and the most current versions are maintained at
- princeton.edu: pub/Graphics/Papers as "RayBib.*" and "RadBib.*".
-
- Tom Wilson (wilson@cs.ucf.edu) has collected over 300 abstracts from ray
- tracing related research papers and books. The information is essentially
- in plaintext, and Latex and troff formatting programs are included. This
- collection is available at most of the sites above as "rtabs.*".
-
- 17) SIGGRAPH information online
-
- [from Steve Cunningham and Ralph Orlick]
-
- ACM-SIGGRAPH announces its online information site at siggraph.org
- (128.248.245.250). This site now provides SIGGRAPH information via both
- anonymous ftp and an electronic mail archive server.
-
- The anonymous ftp service is very standard, and the ftp directory includes
- both conference and publications subdirectories.
-
- To retrieve information by electronic mail, send mail to
- archive-server@siggraph.org
- and in the subject or the body of the message include the message send
- followed by the topic and subtopic you wish. A good place to start is with
- the command
- send index
- which will give you an up-to-date list of available information.
-
-
- 18) SIGGRAPH Panels Proceedings available
-
- [from Steve Cunningham and Bob Judd]
-
- ACM SIGGRAPH announces the availability of the SIGGRAPH '91 Panels Proceedings
- at the siggraph.org site (128.248.245.250). The proceedings are available
- in three formats:
- text (ASCII)
- rtf (rich text format, suitable for many word processors)
- word (MS Word for the Macintosh)
- They may be retrieved from siggraph.org in two ways:
-
- (1) by anonymous ftp
- change to one of the directories
- publications/s91/panels_proceedings/[text|rtf|word]
- The text and rtf files may be downloaded in ASCII mode, while the word
- files are stored in MacBinary format and must be downloaded in binary
- mode.
-
- Each directory contains a Table of Contents file (TOC) that describes the
- contents of each panel file.
-
- (2) by electronic mail
- send mail to
- archive-server@siggraph.org
- You can retrieve either the text or rtf files. We suggest that you
- first retrieve the index files by putting one of the messages
- send panel91-txt index
- send panel91-rtf index
- in the subject or body of the message. You will get the necessary
- information to retrieve the actual transcript files.
-
-
- 19) Graphics mailing lists
-
- There are a variety of graphics-related mailing list out there, each
- covering either a single product or a single topic. I have been an
- active participant in one of these for some time now, and find the
- focus and expertise which can be brought to bear on an isolated topic
- to be nothing short of amazing.
-
- Please send me the appropriate information if you have any others you
- would like to see added.
-
- Name: Imagine mailing list
- Description: Discussion forum for users of the Imagine 3D Rendering and
- Animation package by Impulse, Inc.
- Platforms: Amiga
- Subscription: imagine-request@email.sp.unisys.com
- Posting: imagine@email.sp.unisys.com
-
- Name: DCTV mailing list
- Description: Discussion forum for users of the Digital Creations DCTV
- box, software, and file formats
- Platforms: Amiga
- Subscription: DCTV-request@nova.cc.purdue.edu
- Posting: DCTV@nova.cc.purdue.edu
-
- Name: Rayshade Users mailing list
- Description: Discussion forum for users of the Rayshade raytracer
- Platforms: Most UNIX boxes, Amiga, Mac, IBM
- Subscription: rayshade-request@cs.princeton.edu
- Posting: rayshade-users@cs.princeton.edu
-
- Name: Lightwave software for Toaster mailing list
- Description: Discussion forum for users of Lightwave, the Video
- Toaster modelling and rendering package
- Platforms: Amiga
- Subscription: lightwave-request@bobsbox.rent.com
- Posting: lightwave@bobsbox.rent.com
-
- --
- John T. Grieggs (Telos @ Jet Propulsion Laboratory)
- 4800 Oak Grove Drive, Pasadena, Ca. 91109 M/S 525-3660 (818) 306-6506
- Uucp: {cit-vax,elroy,chas2}!jpl-devvax!grieggs
- Arpa: ...jpl-devvax!grieggs@cit-vax.ARPA
-