HDTenEightyP/NetNews huggingface dataset:
From: zhao@explo.Geop.UBC.CA (Shengkai Zhao)
Newsgroups: comp.graphics.gnuplot
Subject: Hidden line removal with data??
Date: 7 Jan 1993 02:59:16 GMT
Organization: Dept. of Geophysics & Astronomy, UBC, Vancouver, Canada
NNTP-Posting-Host: explo.geop.ubc.ca

I want to plot a 3d picture with hidden feature by the splot command.
I can do with a function, such as:
  splot [x=0:10] [y=0:10] (x-5)**2+(y-5)**2
But for the same function discretized in a data file (11x11 grid points)
"fort.7", I can not do it.  I would like to be able to specify a
possibly irregular grid of x,y,z  points (parametric mode) and still
use hidden line removal.

If anyone can help, please send e-mail to me at <zhao@geop.ubc.ca>
or post to this newsgroup.  Sorry if this is a FAQ.
Newsgroups: comp.graphics.gnuplot
From: soc@isl.Stanford.EDU (Sharon Cioffi)
Subject: Problem with unequal column lengths in gnuplot data file
Organization: Stanford University
Distribution: usa
Date: Thu, 7 Jan 93 19:08:48 GMT

  I am gathering data from various sources and placing it into columns
in a file for processing by gnuplot.  The problem is that I do not always
have the same number of data points in each column.  This is not a case of
missing data, it is simply the end of the data in a particular column.
  I would like gnuplot to just stop plotting the curve when there is no
more data in the column. I only know the *number of* points in a column,
but not necessarily the range of the data, so limiting the range is out.
Also, I am likely to have two or more curves on one graph, and do not want
the same range limitations on the other curves necessarily.
  Does anyone have any ideas which might allow me to plot data files with
such a format (i.e. unequal column lengths) within the current gnuplot
environment?  Thanks in advance for any help.
Sharon Cioffi
 
Newsgroups: comp.graphics.gnuplot
From: davisre@sage.cc.purdue.edu (Robert Davis)
Subject: Re: long file names?
Organization: Purdue University Computing Center
Date: Wed, 13 Jan 1993 04:11:37 GMT

In article <1993Jan12.192012.22670@noose.ecn.purdue.edu> mccauley@ecn.purdue.edu (Darrell McCauley) writes:
>I'm having problems with long file names. Gnuplot says:
>gnuplot>  plot 'long_file_name_w_full_path' w p
>               ^
>         can't open data file
>         (No such file or directory)
>
>but 'ls -l long_file_name_w_full_path' says
>
>-rw-r--r--  1 mccauley     3824 Jan 12 14:10 long_file_name_w_full_path
>
>Using 'wc', the filename appears to be 91 characters long.
>I don't have source handy, but is there a built in limit?

	This is a bug that seems to have been introduced in 3.2 (maybe
it was in 3.1, I'm not sure).  It was fixed in the 3.3 beta that I saw.

	A work around would be to issue a "cd" command within gnuplot
to make the path name shorter -- but the bug affects "cd" as well, so
it might take several commands if it is a very long path:

		cd 'dir_name'
		plot 'file_name' w p

	Or

		cd 'partial_dir_name'
		cd 'remainder_of_dir_name'
		plot 'file_name' w p

	It doesn't work in all cases, like if you are trying to plot
several data files in drastically different directories, but will work
in many.


Rob
Newsgroups: comp.graphics.gnuplot
From: d-lewart@uiuc.edu (Daniel S. Lewart)
Subject: Re: Axis labels and xrange
Originator: lewart@rsm1.physics.uiuc.edu
Reply-To: d-lewart@uiuc.edu (Daniel S. Lewart)
Organization: UIUC Physics Department
Date: Thu, 7 Jan 1993 16:43:01 GMT

In article <1993Jan7.135027.6343> toy@soho.crd.ge.com (Raymond L. Toy) writes:

> When plotting a function with an xrange of [3:24], gnuplot draws a
> graph with the x-axis basically running from 3 to 24.  The tic marks,
> however, go from 5 to 20 in steps of 5.  Here's a simple picture:

> There should be some way of doing this.  Graphs look much better when
> they start and end with axis labels.

set xrange [0:25]

Daniel Lewart
d-lewart@uiuc.edu
From: kfischer@ada.seas.ucla.edu (Kevin J. Fischer)
Newsgroups: comp.graphics
Subject: Arc drawing source needed
Date: 7 Jan 93 17:03:46 GMT
Organization: SEASnet, University of California, Los Angeles

I am looking for some source code (preferably C) for drawing
an arc.  I realize that many graphics libraries have this
built-in, but I need the source to such a routine so I can
output my own way.  Thanks for any help.


-- 

Kevin Fischer
kfischer@seas.ucla.edu

Newsgroups: comp.graphics
From: cholasam@news.weeg.uiowa.edu (cholasam)
Subject: Looking for a GL viewer for Macintosh
Organization: University of Iowa, Iowa City, IA, USA
Date: Sun, 10 Jan 1993 01:38:39 GMT

I posted the previous article wrongly. 
Could some one please help me in getting a GL viewer for macintosh.
I would appreciate if someone could mail me the address of the ftp
sites where it is available.

Thanks
Bhaskar

cholasam@umaxc.weeg.uiowa.edu
From: marvil@lysator.liu.se (Martin Vilcans)
Newsgroups: comp.graphics
Subject: RGB<->HSV conversion
Date: 11 Jan 93 12:51:15 GMT
Organization: Lysator ACC at Linkoping University

This article was probably generated by a buggy news reader.
Newsgroups: comp.graphics
From: jbrown@news.weeg.uiowa.edu (Judy Brown)
Subject: Re: ACM SIGGRAPH Online Bibliography
Organization: University of Iowa, Iowa City, IA, USA
Date: Tue, 5 Jan 1993 13:28:30 GMT



Stephen Spencer recently announced the availability of the online computer
graphics bibliography database and associated tools on siggraph.org.
I have looked at it briefly and wish to express my appreciation for the
volunteer effort that made this resource possible.

Thank you, Stephen Spencer!!

Judy Brown
ACM SIGGRAPH Chair

P.S. For anyone who missed the earlier announcement, this database is
available for anonymous ftp from "siggraph.org" (128.248.245.250) in the
"publications/bibliography" directory.


Newsgroups: comp.graphics
From: mark@westford.ccur.com (Mark Thompson)
Subject: Re: Fixed point sqrt anyone?
Organization: Radiant Image Productions, Merrimack NH.
Date: Thu, 7 Jan 1993 21:13:36 GMT

> From: Adam Billyard
             ^^^^^^^^
> approximation in a 3D pool game I did a while back, and I got enough 
                        ^^^^

Hmmmm, just a coincidence? :-)
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%      `       '        Mark Thompson                 CONCURRENT COMPUTER  %
% --==* RADIANT *==--   mark@westford.ccur.com        Principal Graphics   %
%      ' Image `        ...!uunet!masscomp!mark       Hardware Architect   %
%     Productions       (508)392-2480 (603)424-1829   & General Nuisance   %
%                                                                          %
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: comp.graphics
From: astoker@nyx.cs.du.edu (Andrew Stoker)
Subject: Perspective transformation question
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Mon, 11 Jan 93 14:57:32 GMT

I suspect this will strike some people as a stupid question...

In the equations typically given for the transformation, a parameter D
representing distance to the viewing screen/plane is used:

	xs = d * x / z

What "units" is D in?  In one program I'm working on, I'm playing with
landscapes in which 1 unit equals 1 metre, so should I therefore use a D value
of 0.4 - 0.5 (distance from  my eye to monitor screen) or what?

Another point, in Newman and Sproull (about page 342), they have a similar
equation which gives a "dimensionless fraction" which they then multiply by
the size of the screen (in pixels) to get screen coordinates, I tried this,
and got an incredibly zoomed in view of my scene, I suspect a substantial part
of the displayed scene was actually off screen. odd.
--
Andrew J. Stoker | "My lord, I cannot ride!"
Leicester Uni.   | "Capital, we shall give you a horse that can't be ridden."
ajs6@leicester.ac.uk   |		      ``Wyrd Sisters'', Terry Pratchett
Newsgroups: comp.graphics
From: mmcardle@eng.auburn.edu (Mary McArdle)
Subject: Need graphics library for hardcopy support
Organization: Auburn University Engineering
Date: Wed, 6 Jan 1993 01:05:05 GMT

I am searching for a graphics package or library that 
will enable me to create output for both HP plotters and 
postscript printers.

Ideally, I need a package that will let me create my 2-D
drawing wusing virtual coordinates, then it will create the 
file for the hardcopy device.  I am also looking for something
with the ability to break my drawing into  pages.

I need to be able to call the routines from a C program running
on a Sun/Unix system.
.

--
Beth McArdle Allen            ,_~o        Geaux Saints!! 
mmcardle@eng.auburn.edu     _-\_<,        May the Wind be always
                           (*)/'(*)       at your Back.......
From: DonH@cup.portal.com (Don - Hirschfeld)
Newsgroups: comp.graphics
Subject: Re: Information on Imagine for the PC?
Date: Thu,  7 Jan 93 17:04:58 PST
Organization: The Portal System (TM)

Imagine for the PC is suppose to be coming out soon for $495 retail.
For more info call Impulse at 612-566-0221.
Newsgroups: comp.graphics
From: mark@ocsmd.ocs.com (Mark Wilson)
Subject: Viewers w/ Source?
Organization: Online Computer Systems, Inc.
X-Newsreader: Tin 1.1 PL5
Date: Fri, 8 Jan 1993 12:43:57 GMT

This is related to an earlier post which (unfortunately) elicited
no ultimately productive responses (but thanks for the tries!)

Does anyone know of a good graphics viewer WITH SOURCE CODE
for GIF, PCX, maybe some other formats?   Hoping for "C" source...
Please email responses, and I'll post a summary.

--
-------------------------------------------------------------------------------
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!
-------------------------------------------------------------------------------
Newsgroups: comp.graphics,comp.sys.sun.misc
From: wbrand@krishna.shearson.com (Willy Brandsdorfer)
Subject: Re: SUN snapshot.rs -> gif, tif ???
Organization: Lehman Brothers
Date: Tue, 12 Jan 1993 18:19:59 GMT

In article <1993Jan11.185257.23835@nosc.mil> jsmall@nosc.mil (Joel F. Small) writes:


   Is there a conversion program for an image file created using
   the snapshot program on a SPARC2 (OpenWindows 3.0) to a gif
   or tif or some other format that is readily displayable on a
   PC?


	Contact Jef Poskanzer Jef@well.sf.ca.us he'll tell you where to pick
	up his famous public domain pbm utilities. 

----------------------------------------------------------------------
William Brandsdorfer            | UUCP:    !uunet!shearson.com!wbrand
Lehman Brothers                 | INET:    wbrand@shearson.com
388 Greenwich St.               | Voice:   (212) 464-3835
New York, N.Y. 10013            | 
----------------------------------------------------------------------
Newsgroups: comp.graphics,alt.graphics.pixutils
From: thomas@plxsun (Thomas Leibold)
Subject: Re: Your one stop GRAPHICS shop!
Organization: PLEXUS Software, a division of REI
X-Newsreader: TIN [version 1.1 PL6]
Date: Wed, 6 Jan 1993 09:15:22 GMT

MCCORMICK JOSHUA C (jmccorm@a.cs.okstate.edu) wrote:
: From article <bobl.aw4c@bobsbox.rent.com>, by bobl@bobsbox.rent.com (Bob Lindabury - SysAdmin):
: 
: > > Do people use GIF images anymore?  I have gone to JPEG myself with
: > > important 24bit images saved at 100% boosted quality settings.
: 
: You bet they do. Outside of the internet world, GIF is still *the* method for
: storing pictures. I hate to start any kind of flame war here, but JPG's a
: a lossy compression method that is often used improperly, resulting in
: pictures with severly butchered quality. 
: 
: Because of the quality loss, I don't touch JPG unless I have to. Usually, if 
: I'm wanting to save some space, I'll use a program on the PC called GIFLITE.
: It usually reduces the size of pictures by 30%, quality loss is completely
: unnoticeable, and most importantly, the pictures stay in GIF format so that
: large amounts of time don't have to be spent in order to convert the pictures
: to a format that can be easily viewed. 

I agree that JPEG is a lossy picture compression, that when used incorrectly
will reduce the picture quality. However, when used properly it will give
previously unheard of compression ratios without noticeable loss in quality.
Now the worst thing that you can do to a continous tone (real life) picture
after removing most of the color information (by putting it into the 8-bit
GIF format) is to reduce the image content with GIFLITE.
I have yet to see a side by side comparison where it isn't obvious which 
picture is GIFLITE damaged. 

If you reject JPEG because it's lossy, I don't understand why you use GIFLITE.


Thomas

P.S.: There is at least one GIF-compressor that achieves avg. 20% lossfree 
compression (GIFBLAST). It also has the advantage to be available for other
plattforms besides DOS. However it requires de-compression prior to viewing.

--
Thomas Leibold   +1-408-7434388   thomas@plx.com   {uupsi,sun}!plx!thomas
PLEXUS Software, a division of REI. 1310 Chesapeake Terrace, Sunnyvale CA 94089
Newsgroups: comp.graphics,comp.graphics.visualization,comp.parallel
From: haggas@kean.ucs.mun.ca
Subject: Re: Synchro problem with TARGA board
Organization: Memorial University. St.John's Nfld, Canada
Date: Tue, 12 Jan 1993 18:56:42 GMT

In article <C0pK51.DL1@ireq.hydro.qc.ca>, regie@nelligan.ireq-robot (Regis Houde) writes:
> I can't get my TARGA+ board to synchronize properly when it's
> connected to a VCR in pause, fasf or rewind mode. Play mode or
> live from a camera work just fine. 
> 
> Any ideas?
> 
> --------------------------------------------------------------------
> Regis Houde                             regie@ireq-robot.hydro.qc.ca
> Institut de recherche d'Hydro-Quebec    regie@ireq-robot.uucp
> 1800, montee Sainte-Julie		(514) 652-8107
> Varennes, Que., Canada   J3X 1S1	FAX : (514) 652-8435
> --------------------------------------------------------------------
> 
Do you have the toolkit?
Does the lack of synchronization occur with composite video input from 
as well as composite video output to the VCR? Is your VCR a standard NTSC
machine(as opposed to S video)?
Here are two ideas: allow the SET TARGASET to default to Composite 
Video Input (rather than 'R' for RGB input), and use the SetDisplay 
Mode () 'C' library function in your program as 
SetDisplayMode(dispModeLive);	/* places TARGA+ in live mode */
				/* requires #include file <targraf.h> 
*/

One more thought, is the monitor that you are using with the TARGA+ 
interlaced(NTSC format)?
John Haggas
Chief Medical Technologist
Multidiscipline Laboratories
Faculty of Medicine
Memorial University of Newfoundland
haggas@kean.ucs.mun.ca
From: pigeon@access.digex.com (Terry Myers)
Newsgroups: comp.graphics
Subject: ventura publishing to wpg
Date: 13 Jan 93 00:39:10 GMT
Organization: Express Access Online Communications, Greenbelt MD USA
NNTP-Posting-Host: access.digex.com
Summary: converting ventura publishing files to wpg
Keywords: graphics

Is it possible to convert ventura publishing files to wpg. Appreciate
any responses via e-mail - thanks


Terry Myers    ---   pigeon@digex.com
Newsgroups: comp.graphics
From: trimble@ph-meter.beckman.uiuc.edu (Chris Trimble)
Subject: Re: Attendance at SIGGRAPH
Organization: University of Illinois at Urbana
Date: Fri, 8 Jan 1993 21:39:54 GMT

orourke@sophia.smith.edu (Joseph O'Rourke) writes:

>Can anyone tell me the attendance at the last SIGGRAPH conference,
>say to the nearest thousand?  Thanks!

 The estimate that I heard at the end of the conference was
 somewhere in the ballpark of 35,000 people.

    - C

--
Chris Trimble	         | I'll tell you why 
B.I. Systems Services    | But you wouldn't believe me 
chris1@uiuc.edu          | You just haven't earned it yet, baby    - The Smiths 
Newsgroups: comp.graphics.animation
From: ohnielse@oersted.ltf.dth.dk (Ole Holm Nielsen)
Subject: Re: animating sun raster files...
Reply-To: ohnielse@oersted.ltf.dth.dk
Organization: Lab of Applied Physics, Tech. Univ. of Denmark
Date: Wed, 6 Jan 1993 14:11:06 GMT

In article 3388@cs.brown.edu, kal@lems.brown.edu (Kaleem Siddiqi) writes:
>I'm just wondering if anyone knows of any public
>domain animation programs that will work with
>sun raster files. I'm interested in playing
>several stored sunraster files back and forth
>at various speeds.

Three years ago I wrote Movietool for the SunView window system
(Sorry, no X version available).  It does what you want, and it is
very fast (depending on your CPU etc.).  Get it by anonymous-FTP to:
oersted.ltf.dth.dk (129.142.66.16) in /pub/movietool-1.3.1.shar.Z

With best regards,

Ole H. Nielsen
Laboratory of Applied Physics, Building 307
Technical University of Denmark, DK-2800 Lyngby, Denmark
E-mail: Ole.Holm.Nielsen@ltf.dth.dk
Telephone: (+45) 42 88 24 88 ext. 3187
Telefax:   (+45) 45 93 23 99

Newsgroups: comp.graphics.animation
From: nowinski@sciborg.uwaterloo.ca (Andrew Nowinski)
Subject: Questions
Organization: University of Waterloo
Date: Tue, 12 Jan 1993 21:06:36 GMT


Hi,
   my name is Mark Nowinski and I have some questions on the
Video Toaster & computer graphics companies. Can you colorize
blank & white movies with the Video Toaster? Are there other
animation programs like LightWave 3D to the Video Toaster and to
the PC? How many colors does LightWave 3D? What is the highest
recordable resolution from the computer graphics company
Wavefront use? What kind of hardware & software does Robert Abel
& Associates use?.

Thanks in advance!

--
Mark Nowinski
E-Mail: nowinski@sciborg.uwaterloo.ca
From: wlt4326@ritvax.isc.rit.edu (William L.M. Trainor)
Newsgroups: comp.graphics.animation
Subject: Autodesk Animator Pro prices, please!
Date: 7 Jan 93 18:20:05 GMT
Reply-To: wlt4326@ritvax.isc.rit.edu
Organization: Rochester Institute of Technology

I'm trying to find the best mailorder price on Autodesk Animator Pro.  So far
I've found it at CCSI in Georgia for $645.  Has anyone found it for less?  Is
there a mailorder place or two that generally has good prices and extensive
titles?

Thanks!

===
william l.m. trainor    wlt4326@ritvax.isc.rit.edu
animation - cinematography - graphics
"Low budget is Good budget."
Newsgroups: comp.graphics.animation
From: nowinski@sciborg.uwaterloo.ca (Andrew Nowinski)
Subject: POV Questions
Organization: University of Waterloo
Date: Tue, 12 Jan 1993 21:13:08 GMT


Hi,
   my name is Jack Nowinski, two days ago I was rendering a scene
on POV-RAY when I accidentally intrerupted the computer and it
stoped rendering, is there a way I could finish the rest of the
image? I remembered the line number it was 237 of 480.

How many colors does Dave's Targa Animation support? Will it
display 32k images in full color without no problem? What
resolution does it use?

Is POV animation or pictures used in any TV shows? Could
animations like Pixar, Wavefront be produced by Dave's Targa
Animation?  

Is there a paint program that can make Targa images, and have 32k
color at one time? What is is called? And can I get it at any FTP
sites?

Thanks in advance.

--
Jack Nowinski
Xref: sparky comp.graphics.animation:1489 comp.graphics:13464
From: horvath@cygnus.hks.com ()
Newsgroups: comp.graphics.animation,comp.graphics
Subject: .FLI file format
Date: 6 Jan 1993 18:20:29 GMT
Organization: HKS, Inc.
Distribution: world
Reply-To: horvath@cygnus.hks.com ()
NNTP-Posting-Host: cygnus.hks.com


Does anyone know where I can find a program that writes XImages
or XPixmaps to the .FLI file format? I have some X-windows images
I want to animate under xflick.

			Thanks,
				Mark

horvath@cygnus.hks.com

================================================================================
"Och, You didn't tell him how long it would *really* take, did you?"

horvath@cygnus.hks.com   "Often wrong, never in doubt"

================================================================================
From: Marc Bernatchez Thank's in advance for your reply
Newsgroups: comp.graphics.animation
Subject: Re: Babble from Marc Bernatchez
Summary: HELP ...
Date: 9 Jan 93 06:30:38 GMT
Organization: Universite Laval


Date:  9 Jan 93 06:30:38 GMT
Newsgroups: comp.graphics.animation
Subject: Re: Babble from Marc Bernatchez
Distribution: world
Summary: HELP ...
From: Marc Bernatchez
 
Can somebody tell me if it's possible to send multiple uuencoded files on the
net ? I would like to send a couple of animations (.fli) here but I have over
1 MEG of it to send splited into about 25 ascii files (uuencoded). Is it
possible to specify wildcard like "?" and "*" ?
 
Any suggestion will be greatly appreciated...
 
        Thank's in advance for your reply
 
====================================================================
== Marc Bernatchez          =        gel24@gel.ulaval.ca          ==
== Universite LAVAL         =                                     ==
== Quebec, Canada           = graphics is the future of computers ==
====================================================================
 
Newsgroups: comp.graphics.animation
From: dhumphre@comanche.ess.harris.com (David Humphreys)
Subject: Re: 3D Studio vs. Lightwave
Date: Tue, 12 Jan 1993 21:31:38 GMT
Reply-To: dhumphre@comanche.ess.harris.com
Organization: Harris Corporation, Government Aerospace Systems Division

One thing I havn't seen anybody mention about 3D Studio is its interface
which allows stuff like procedural shaders and modelers to be easily
incorporated into it.  There is a fairly large supply of third party add-ons
which use this interface. For example, I have seen add-ons for 3D studio that
will do things like particle systems (exploding objects with gravity,
tornadoes, fireworks, etc), additional procedural material shaders, melting
objects, enhanced morphing capabilites, snow and rain simulations, etc.
Most of these add-ons are fairly inexpensive (at least the ones that I have
seen) and do add a lot to the program's capabilities.

I have no idea what capabilities Lightwave has in this area, this was just
something that I really liked about 3D Studio.

David Humphreys

Xref: sparky comp.graphics.animation:1494 rec.video:15536