HDTenEightyP/NetNews huggingface dataset:
From: tohanson@gonzo.lerc.nasa.gov (Jeff Hanson)
Subject: Re: SIGGRAPH to do online electronic publication
Keywords: SIGGRAPH, electronic publication, online, experimental
Organization: NASA Lewis Research Center
Date: Fri, 8 Jan 1993 17:05:17 GMT

In article <1993Jan8.152029.20363@crd.ge.com>, davidsen@ariel.crd.GE.COM (william E Davidsen) writes:
|> In article <1993Jan7.195626.21916@koko.csustan.edu>, rsc@altair.csustan.edu (Steve Cunningham) writes:

|>   This is a good example when GIF may be better than JPEG, and might
|> even be the optimal choice for this content. GIF does a VERY good job
|> compressing monochrome images, while JPEG was not designed for this
|> application and it shows. While GIF is limited to 256 colors,
|> quantization and dithering can provide an acceptable (if not optimal)
|> image form 24 bit color, and would probably be a better compromise.
|> 
|>   If a less commonly used format is acceptable, I suppose compressed 24
|> bit TIFF would be an even better (but larger) solution than GIF.
|> 

Note that TIFF supports 1 bit monochrome and 8 bit color indexed just the
same as GIF.  People could use various color resolution TIFF files as their
needs indicated.
-- 
---------------------------------------------------------------------------
 Jeff Hanson - Scientific Graphics Programmer and Workstation Administrator
 Sverdrup Technology, NASA Lewis Research Center Group
 NASA Lewis Research Center, MS 86-4, Cleveland, Ohio 44135
 Telephone - (216) 433-2284  Fax - (216) 433-2182
 tohanson@gonzo.lerc.nasa.gov	-   ViSC: Better Science Through Pictures
 Visualize whirled peas - Bumper sticker seen in Buffalo, NY
From: sahr@piglet.uccs.edu (Kevin Sahr)
Newsgroups: comp.graphics
Subject: Re: NEED POINT_AND_CLICK UNIX GRAPHICS PACKAGES
Date: 8 Jan 1993 01:54:30 GMT
Organization: University of Colorado at Colorado Springs
NNTP-Posting-Host: piglet.uccs.edu

In article <4JAN199318001048@ctrvx1.vanderbilt.edu> umarsa00@ctrvx1.vanderbilt.edu (PROF. A.S. UMAR, (615)322-2459) writes:
>
>I am looking for commercial or shareware point-and-click
>packages that are able to do contours and surfaces with
>capabilities to manipulate axis and labels. Fancy postscript
>labels with symbols is a must.
>
>This is a challenge I never faced before. I am willing to
>find something but cannot find anything. I do not want a 
>command line package like IDL or PV-Wave, Mathematica,
>Speakeasy, gnuplot,....
>
>Why is this kind of graphics gui for unix is so far behind?
>
Pretty disgusting, isn't it? About a year ago we undertook 
a similar search and finally decided to stick with the Mac 
for our contour plots (painfully slow for large data sets).

You might look into Wingz. The Mac version does everything 
you want and I understand it has now been ported to many
Unix platforms, though I've never personally used it on
anything other than a Mac. Here's an (old?) address to try:

   Informix Software
   4100 Bohannon Dr.
   Menlo Park, CA  94025

Phone: 800-438-7627 or 415-926-6300

>PS: My system is ibm/rs6000.
>

Don't know if it's available for the ibm/rs6000, but 
worth a look.

>umar@compsci.cas.vanderbilt.edu         Prof.A.S. Umar
>umarsa00@vuctrvax.bitnet                Department of Physics & Astronomy
>Tel: (615) 322-2459                     Vanderbilt University
>Fax: (615) 343-7263                     Nashville, TN 37235

Kevin Sahr
CAE-Link Corp.
From: af774@cleveland.Freenet.Edu (Chad Cipiti)
Newsgroups: comp.graphics
Subject: Commercial Vivid?
Date: 6 Jan 1993 15:56:23 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


I've heard rumors that there is a commericla version of Vivid
 coming out soon this year.  Anyone know anything about this?

Chad


-- 
    ....                  SHARK ENCOUNTER
~ ~  :::::. ~~~  ~   ~      new in 1993             Chad Cipiti
 ~~ ::::::::. ~   ~~     Sea World of Ohio   af774@cleveland.freenet.edu
~~.:::::::::::.~ ~~~ ~    "Make Contact."
Xref: sparky comp.graphics:13565 alt.graphics.pixutils:2865
From: markg@gvgdsd.GVG.TEK.COM (Mark Gydesen)
Newsgroups: comp.graphics,alt.graphics.pixutils
Subject: Re: Your one stop GRAPHICS shop!
Date: 8 Jan 93 06:27:54 GMT
Organization: Grass Valley Group, Grass Valley, CA
NNTP-Posting-Host: gvgdsd.gvg.tek.com

In article <1ifdfaINNim7@hpscit.sc.hp.com> klui@corp.hp.com (Kenneth K.F. Lui) writes:
>if full-color display hardware is available.  People won't have
>8-bit video forever, and I see the trend going towards 24-/32-bit
>video in the near future.  The trend is JPEG; GIF will die soon

There is no need to go beyond 24 bit color, unless you want to store IR
or UV data as well as visible light. The human eye can only distinguish
up to 24 bits of color information.

But then again, one never knows... for 3D images, or heat sensitive
images etc... beyond 24 might become practical, ... sorry for the
interruption.


-- 
/------------- Mark Gydesen ---------------+--- Grass Valley Group ---\
| I only say what I thought I said, and not|    ==============\/==    |
| what they said I say I thought I said.   | markg@gvgtsg.gvg.tek.com |
\__________________________________________+__________________________/
Newsgroups: comp.graphics
From: mark@ocsmd.ocs.com (Mark Wilson)
Subject: Re: PCX Source including 24-bit, VGA...
Organization: Online Computer Systems, Inc.
X-Newsreader: Tin 1.1 PL5
Date: Mon, 4 Jan 1993 14:21:45 GMT

--
AUGH!  This is once again MY question, AND my NIGHTMARE!
I have two editions of Rimmer's book and NEITHER one works for me!
(Or some acquaintances, so it's not just me!)  And I don't have
access to download files from most sites, because of my company's
limited Internet access, so that doesn't help me.

PLEASE no flames!

(Still looking for: DOS-based code in MS C 7.0 or similar,
to display PCX and/or GIF, etc. graphics from disk to screen,
prefer VGA modes... *sigh*)

--
-------------------------------------------------------------------------------
Mark Wilson, Online Computer Systems.  1-800-922-9204 or 1-301-601-2215
(Try email address mark@wilson.ocs.com....)
This file .disclaims everything signed with my .signature, I .mean it!
-------------------------------------------------------------------------------
From: gleicher@CS.CMU.EDU (Michael Gleicher)
Newsgroups: comp.graphics
Subject: Mechanism Simulation
Date: 13 Jan 93 05:01:18 GMT
Article-I.D.: cs.C0s0MC.JF2.1
Distribution: comp
Organization: CMU Graphics Group
Originator: gleicher@HOSTESS.GRAPHICS.CS.CMU.EDU


I am looking for references on mechanism simulation. In particular, I'm
looking for examples of systems which let you interactively play with the
behavior of linkages and things. (I'm most interested in the interactive
part, but am looking for anything).

I would also be interested in hearing from people who have experienced the
commerical mechanisms design packages. 

I'm curious to see what others are doing (I'm doing some in my system, and am
curious to see if its interesting or not - it sure is fun, if nothing else)

Any and all references will be appreciated. 

Thanks,
	Mike
-- 
Michael Lee Gleicher				gleicher@cs.cmu.edu
		ski bum, graphics hacker, and SCS PhD student
Carnegie Mellon University, Pittsburgh, PA 15213-3891	(412) 268-6243 (school)
Newsgroups: comp.graphics
From: vbaelen@cs.kuleuven.ac.be (Kristoffel Van Baelen)
Subject: refs. wanted
Keywords: raterisation
Organization: Dept. Computerwetenschappen
Date: Mon, 4 Jan 1993 17:18:01 GMT

    Hello,

I am a student in computer science at the univerity 
of Leuven in Belgium (Europe).

I am looking for references (recent articles ...) on
algorithms and techniques for the visualisation of 
(higher order) curves. 
One calls this subject 'rasterisation', which can be
seen as a generalisation of the algorithms of Bresenham  
or DDA for the visualisation of straight lines.

Could you please ... please help me ?


                          Thanks anyway,

                           Kris Van Baelen
From: avk@elecard.tomsk.su (Alexander Krutikov)
Newsgroups: comp.graphics
Subject: HELP: Autodesk Internet adress and some info BADLY NEEDED!
Date: Mon, 04 Jan 93 22:46:07 +0700
Distribution: world
Organization: Elecard ltd hq
Reply-To: avk@elecard.tomsk.su
Keywords: Autodesk

Dear netters,

I'd like to know two things:

1) Does anybody know Autodesk Internet adress? (Any person from there).

2) Any info about developing ADI protected mode drivers for
   Autodesk 3D Studio or Autocad 386. The purpose is "connecting"
   our OWN output devices to 'em.

Any information would be appreciated.
Please reply to the adress given below, not to this group.

Thank you,
Alex



-- 
Alexander V. Krutikov,			Internet: avk@elecard.tomsk.su
Elecard Ltd.,                           FIDO:	  2:5000/9.31
Tomsk, Russia.
Newsgroups: comp.graphics
Subject: Help on file formats
From: steve_be@vulcan.mentec.ie
Date: 11 Jan 93 19:42:05 GMT
Organization: Mentec Computer Systems, Dublin, Ireland
Nntp-Posting-User: steve_be

Hi there,
	I've a friend at university who's trying to read various
picture file formats, and then process the images on a PC. The
formats involved are:
	tiff	msp	img	cut	pic	PIX

Does anyone have a breakdown of how these files are stored, and
if possible, example code?

Thanks in advance

Steve
Newsgroups: comp.graphics
Subject: BEST WAY to scan 3D objects?
From: geoffrey@cosc.canterbury.ac.nz (Geoff Thomas)
Date: Mon, 11 Jan 1993 02:00:13 GMT
Organization: University of Canterbury, Christchurch, New Zealand



Anyone know what the best way is currently to scan in a bunch of
3D objects? Physical attributes of the objects (e.g. colour,
internal structure) not important, but accuracy of the external
shape and it's position are, and this applies over the whole surface
of the object (e.g. both sides of a sphere).

Any hint, tips, ideas?
Newsgroups: comp.graphics
Subject: Info needed on enclosing bicubic patch 
From: slf1l@mendon.enet.dec.com (869883 Sanghavi Swapnesh Harshadray)
Date: 9 Jan 93 13:36:48 MDT
Reply-To: slf1l@mendon.enet.dec.com (869883 Sanghavi Swapnesh Harshadray)
Distribution: world
Organization: Digital Equipment Corporation


Keywords: 
Hello :
  
	I am looking for an algorithm to enclose a bicubic patch within a
sphere. Any information would be helpful. I could be contacted at the 
following e-mail address : slf1l@cache.declab.usu.edu.

        Thanks in advance.

- swapnesh.
Newsgroups: comp.graphics
From: keane@eng.umd.edu (Christopher Matthews Keane)
Subject: Re: *.FLC viewer for 386/486
Date: Mon, 11 Jan 93 16:42:19 GMT
Organization: College of Engineering, Maryversity von Uniland, College Park
Distribution: USA
Originator: keane@earthsun.umd.edu


I was asked by several people to post a summary of responses I had to a similar question
concerning the generation of .fli and .flc files.  As for a .flc viewer, I recommend
using play.exe with the -m2 option - does a nice job.  CorelShow also handles .flc files
nicely....

As for .fli and .flc generation....  If you want to generate a .fli or .flc file with
you .gif, etc.. source files being the same resolution, then I recommend using
 a program called dta.exe - thanks to the gentleman who ftp'd it to me.

If you need to reduce your resolution, I can only recommend tgafli.exe which
takes targa 16 and 24 bit files and does pixel averaging to get them to the
320x200 resolution.  It is very nice and the pixel averaging is reasonably good.

I am happy with these two - though crave a UNIX based .fli maker which does NOT
require X or SunView - just text based like dta and tgafli and that does
pixel averaging.

But alas - no luck - any ideas?  If you are interested in dta.exe, I'd be
willing to try to find a anon ftp site to put it to - no, I haven't seen it
at simtel.....

Cheers Chris.
Newsgroups: comp.graphics
From: xin-@tss.com (Xin Ye)
Subject: Convert Scanned image into vector (Autocad readable) image file
Keywords: Scanned Image Vector File, Autocad readable files
Reply-To: xin-@tss.com (Xin Ye)
Organization: Teknekron Software Systems. Inc.
Date: Tue, 5 Jan 1993 22:27:08 GMT



I am looking for a software to convert scanned design drawing image into 
vector file, in particular an AutoCad readable image file.

If you know any answer, please email me at xin@tss.com or call me 
at 415-617-2220.



-- 
Xin Ye 
Teknekron Software Systems, Inc.
530 Lytton Ave, Suite 301
Palo Alto, CA 94301
Work: (415)617-2220 
Home: (415)379-0199

Email: xin@tss.com
From: gmt@beach.cis.ufl.edu (Gary McTaggart)
Newsgroups: comp.graphics
Subject: RE: fixed-point square root
Date: 9 Jan 93 17:25:38 GMT
Organization: Univ. of Florida CIS Dept.

murrayk@prism.CS.ORST.EDU (the Dodger) writes:
>Well? Does anyone know of a quick and dirty way to get a reasonably accurate
>square root of a fixed point integer number? My numbers are stored in a 16.16
>bit format. I've heard of a few ways, but I'm open for ideas. I just want to
>keep on avoiding floating point for ethical reasons. 8^)

I wrote a routine a while back to do an integer square-root using a lookup
table.  This routine (below) could be modified to do a fixed-point sqrt by
subtracting 16 (for you case of 16.16 fixed point numbers) from the final
right shift.  If you have any problems or suggestions for improvement,
please mail me.  

--Gary McTaggart

PS:
I chose to use a relatively small sqrt table because accuracy was not
important.  The table could be boosted up to a larger size for more accuracy.

----------------------------------------------------------------------

#include <math.h>

/* Create a type for a 32 bit unsigned integer. */
typedef unsigned long UINT32;

/* These hard-coded numbers are here because of a brain-dead compiler which 
   would not resolve constant expressions at compile time. */
#define ONE_SHL_31 2147483648UL
#define ONE_SHL_30 1073741824UL

UINT32 sqrt_table[256];

void init_sqrt_table(void)
  {
    unsigned long int i;

    for (i = 0; i < 256; i++)
        sqrt_table[i] = sqrt((double) ((UINT32)i << 24) );
  }

/* --------------------------INTEGER SQUARE ROOT------------------------*/
UINT32 int_sqrt(UINT32 in)
  {
    int lsh = 0;

    while (!( (in << lsh) & ( (UINT32) ONE_SHL_30 ) ) )
        lsh++;
    if (lsh % 2)
        lsh++;

    return (sqrt_table[( (UINT32)in << lsh) >> 24]) >> ((lsh) / 2);
  }
Newsgroups: comp.graphics
From: slumos@unlv.edu (Steve Lumos)
Subject: Re: Touch Screens
Organization: UNLV Computer Science
Date: Sun, 10 Jan 93 01:56:48 GMT

>In article <1993Jan2.195959.21840@spang.Camosun.BC.CA> morley@suncad.camosun.bc.ca (Mark Morley) writes:
>>About a year ago I saw someone demonstrate a touch screen that simply
>>fitted over a regular 14" VGA monitor.  It converted the "touches" into
>>mouse signals.  In other words, once you have written software to work
>>with a Microsoft mouse you don't have to change anything to make it work
>>with this touch screen.  Did that make sense?  Anyway, I can't remember
>>who made it or how much it cost, etc.  If anyone out there has any info on
>>this or similar products, I'd be most interested in getting it.  Also, if
>>you have ideas for other touch screens or alternatives I'd like to hear them.

IBM makes just such a beast. I do not remember the name or part
number, and I think that it is meant for a PS/2 mouse port, contact
IBM and they'll surely give you the runaround for awhile but
eventually get you to someone who knows what they are talking about.
The cool thing I remember about this particular touch screen is that
it had z-axis sensitivity.

I also saw a new one in some magazine but don't remember anything
about it except that it was a platform that actually sits under your
monitor. It is supposed to work pretty well, but the resolution is
alot lower.

-- 
Steve Lumos - slumos@cs.unlv.edu
Newsgroups: comp.graphics
From: rickc@netcom.com (Ricky A. Coldwell)
Subject: plot software for H.I. cps 14
Summary: Looking for driver software for old Houston Instrument plotter
Keywords: plotter complot Houston Instrument driver
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Mon, 4 Jan 1993 13:36:57 GMT



I'm looking for some software to drive a Houston Instruments CPS14 
plotter.  This is an old plotter that doesn't speak any of the new
plotter graphics languages such as dmpl or hpgl.  The manual has a
some info on the ptc-5 controller, but no useable code.  Apparently
when it was new it came with a package called Complot which was a
subroutine library that worked with the plotter.

Has anyone written any software to work with one of these plotters
that they would be willing to share?  Houston Instruments no longer
has software avail for the plotter, they only suggested upgrading
the controller (for more dollars than I paid for the plotter) so it
could talk dmpl.

Thanks,
Rick Caldwell
rick@dfwdsr.sinet.slb.com  or
rickc@netcom.com

Newsgroups: comp.graphics
From: eng10205@nusunix1.nus.sg (LING SIEW WEE)
Subject: Comments on Cirrus Logic
Organization: National University of Singapore
X-Newsreader: TIN [version 1.1 PL6]
Date: Sat, 9 Jan 1993 17:25:37 GMT

A friend of mine has many trouble with a display card called:

	Cirrus Logic 5422(AVGA3)

Apparently the problems were the inability to configure to Windows even
with its own manufacture supplied drivers and conflicts with other
cards.

I just like for any comments on this card  ie. whether is it good and
its compatibility with softwares.

Wilfred Ling

Newsgroups: comp.graphics
From: jmccorm@a.cs.okstate.edu (MCCORMICK JOSHUA C)
Subject: WANTED: Collection of simple/good vector algorithm.
Followup-To: jmccorm@a.cs.okstate.edu
Organization: Oklahoma State University, Computer Science, Stillwater
Date: Wed, 6 Jan 93 00:43:25 GMT
Keywords: vector graphics

I'm looking for a text file that documents some good, efficient, easy to
understand vector graphics routines. I'm also looking for some general
information on doing fast animation on the IBM.

I'm working on a graphics demo in the 320x200x256 color mode, using Turbo 
Pascal, with quite a bit of inline assembler thrown in for speed.

Any help would be appreciated.

-- 

      ### ####  #### Name: Josh McCormick
      ### ########## -----------------------------------------
  ### ### ### ## ### Addr: jmccorm@a.cs.okstate.edu
Newsgroups: comp.graphics
From: ansga01@mailserv.zdv.uni-tuebingen.de (Thomas Gaiser)
Subject: Experiences with licenced version of French PV3D?
Summary: Questions about PV3d
Keywords: POVray, wire frame modeller
Organization: Comp. Center (ZDV) U of Tuebingen, FRG
Date: Thu, 7 Jan 1993 11:15:45 GMT

I just downloaded the crippled "shareware" version of PV3D, a wireframe
modeller for POVray from France and it seems
to be quite impressive. Has anybody already got a registred version
of this program? I would like to hear about any experiences because I'm
thinking of registering.
Thanks in advance,
Thomas
--
*  Thomas Gaiser            *  ansga01@mailserv.zdv.uni-tuebingen.de  *
*  Seminar fuer Sinologie   *_________________________________________*
*  Herrenberger Str. 51     *  home: Elchtrasse 21                    *
*  7400 Tuebingen, Germany  *        7410 Reutlingen                  *
Xref: sparky comp.graphics:13587 alt.graphics.pixutils:2875
From: abh@genesis.nred.ma.us (Andrew Hudson)
Newsgroups: comp.graphics,alt.graphics.pixutils
Subject: Re: Your one stop GRAPHICS shop!
Date: 8 Jan 93 09:08:10 GMT
Organization: Genesis Public Access Minix  +1 508 664 0149

In article <1ij6taINN8rf@gvgspd.gvg.tek.com> markg@gvgdsd.GVG.TEK.COM (Mark Gydesen) writes:
>In article <1ifdfaINNim7@hpscit.sc.hp.com> klui@corp.hp.com (Kenneth K.F. Lui) writes:
>>if full-color display hardware is available.  People won't have
>>8-bit video forever, and I see the trend going towards 24-/32-bit
>>video in the near future.  The trend is JPEG; GIF will die soon
>
>There is no need to go beyond 24 bit color, unless you want to store IR
>or UV data as well as visible light. The human eye can only distinguish
>up to 24 bits of color information.
>
>But then again, one never knows... for 3D images, or heat sensitive
>images etc... beyond 24 might become practical, ... sorry for the
>interruption.
>
>/------------- Mark Gydesen ---------------+--- Grass Valley Group ---\

Having worked on a project which samples at 48-bits (16-bit CCD
* 3 planes) and then quantizes down to 24-bit I can say that
the human eye CAN and does distinguish color information
at higher than 24-bit/pixel.  This information is especially
noticeable in highlights and shading, i.e. dynamic range.

When we get tired of those ugly 24-bit images we can get started
on 36 and 48-bit images!

- Andrew Hudson
North Coast Software
Newsgroups: comp.graphics,comp.programming
From: hollasch@kpc.com (Steve Hollasch)
Subject: Re: union of complex polygons
Summary: Are those cream-filled or frosted?
Organization: Kubota Pacific Computer, Inc.
Distribution: usa
Date: Wed, 13 Jan 1993 01:14:43 GMT

holub@binkly.dec.com (C.G. Holub) writes:
|   I am looking for the most efficient algorithm for obtaining
|   the union of two complex polygons.  These polygons in theory
|   could contain several hundred points and have several donuts.

    There are several CSG algorithms that are designed to handle polygons
with an arbitrary number of English muffins, but none (that I'm aware of)
will handle a general-case donut.  Since there is a class of donut that is
topologically equivalent to an English muffin, you may be able to adapt
these algorithms to your needs with a minimum of fuss, depending, of course,
on the donuts you had in mind.  Bars, bear claws, donut "holes", belong to
this class, but twists, old-fashioned's and cinnamon rolls do not (they have
holes, voids, or are composed of topologically discrete surfaces.

    Hope this helps.

______________________________________________________________________________
Steve Hollasch                                   Kubota Pacific Computer, Inc.
hollasch@kpc.com                                 Santa Clara, California
Newsgroups: comp.graphics
From: mtymp07@staff.tc.umn.edu (Peter Joseph Vessenes)
Subject: POV 1.0 Bug: Question for David K. Buck
Organization: University of Minnesota
Distribution: international
Date: Wed, 6 Jan 1993 19:25:24 GMT

I am a relatively experienced user of PoV 1.0, and have recently gotten access
to an SGI running System V; naturally, I installed PoV on it, and have been
very happy.  However, I have a problem with one data file that I originally
created at home on my 386 and uploaded to the SGI.  Whenever I kick it through
PoV, I get a "Segmentation fault (core dumped)" error.  The docs make no mention
of this.

Any help would be greatly appreciated; this is a piece of work I've been 
interested in doing for a while, and having to render it on a 386/16 with the
SGI just sitting around is not my idea of a happy time.

Thank You,
Peter
-- 
--------------------------------------------------------------------------------
| All those moments will be lost    | Peter Vessenes, Certified Student Prodigy|
|  in time, like tears in the rain. | (CSP), etc. @ Human Factors Research Lab,|
|    peterv@dexter.psych.umn.edu    | U of MN, Mpls:  mtymp07@staff.tc.umn.edu |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: comp.graphics
From: theruvak@IASTATE.EDU (Philip Theruvakattil)
Subject: Winged-edge data structure 
Reply-To: theruvak@IASTATE.EDU (Philip Theruvakattil)
Organization: Iowa State University
Date: Thu, 7 Jan 1993 17:43:24 GMT

Hello:
      I need to use a winged edge data structure as part of my research. Could
somebody tell me where I could get the source for the winged-edge data struct.
(c-language) if available. Thank you very much for any help that may be
rendered. 

Philip Theruvakattil
theruvak@iastate.edu