HDTenEightyP/NetNews huggingface dataset:
Newsgroups: comp.graphics
Subject: Re: Converting epsf to tiff or gif
From: marcello@deis20.cineca.it (Marcello Dalpasso)
Date: 6 Oct 92 17:23:37 +0100
Distribution: world
Organization: Dept. of Electronics, Computer Science & Systems, Univ. of Bologna, Italy
Keywords: epsf, gif, tiff

You can do it with the wonderful xv package (running in the XWindows environment)
developed by John Bradley.

You can ftp it as xv-2.21.tar.Z at export.lcs.mit.edu:/contrib

Hoping this can help you.

Bye
-- 
	Marcello Dalpasso (e-mail: marcello@deis16.cineca.it)
	D.E.I.S. - Department of Electronics, Computer Science and Systems
	Viale Risorgimento 2, I-40136 Bologna, Italy			
	Phone: +39-51-644-3015 (fax: +39-51-644-3073)
From: dszego@srvtech (David Szego)
Newsgroups: comp.graphics
Subject: OCR On Faxes
Date: Mon, 28 Sep 92 13:08:19 EDT
Reply-To: dszego%srvtech@canrem.com (David Szego)
Organization: The Servants Of Technology Inc. (Toronto, Canada)

There is a program by Calera called Fax Grabber which does what you want: 
OCR on faxes. It's shipped with some copies of Winfax Pro.

David Szego.
Newsgroups: comp.graphics.visualization
From: saeed@a.cs.okstate.edu (SAEED FAISEL)
Subject: what do you know about IDS model ?
Organization: Oklahoma State University, Computer Science, Stillwater
Date: Sun, 4 Oct 92 23:11:27 GMT

I need some info on the IDS model suggested by Cornsweet & Yellot.
And I want to start with a comprehensive bibliography on IDS.

Any email containing any pointers like any work done related to IDS,
specially any publications, etc will be appreciated.

I would also like to correspond with anyone currently working on it.



-- 

Faisel Saeed
Computer Science Department,   Oklahoma State University,   Stillwater, OK 
---------------------------------------------------------------------------
Newsgroups: comp.graphics.visualization
From: hollasch@kpc.com (Steve Hollasch)
Subject: Re: ?:Bouncing a ray off a sphere
Summary: How to compute the reflection vector.
Organization: Kubota Pacific Computer, Inc.
Date: Sat, 3 Oct 1992 01:00:21 GMT

paulf@halcyon.com (Paul Forgey) writes:
| Given ray heading (in normalized vector) <x, y, z> and
| Given intersection point on a sphere (x, y, z)
| 
| How do you compute the new ray vector <x, y, z> ?

    It doesn't really matter what your object is, as long as you have an
intersection point, a surface normal, and the ray that hits the intersection
point.                                                   .
                                                        /|\ N
    Ok, my crude ASCII will probably throw you,          |
but the general idea is this.  To compute the            |     _.
reflection vector R', you could do a bunch of      \     |     /| R'
hairy trig by determining the cosine of the         \    |    /
incoming vector and the surface normal, etc.,        \   |   /
etc., but there's an easier (geometric) approach      \  |  /
to this problem.                                       \ | /
                                            __________R_\|/______________
    In the diagram, I've drawn the vector                |\
R twice - once hitting the intersection point,           | \
and once going into the surface from the                 |  \
intersection point.  Well, note that if you add          |   \
2T to the vector R, you get R', where T is the           |    \
projection of the vector R onto the normal vector        V     \|
N.  So                                                  -T     ~` R

       -T = (N.R)N     (where N.R is the dot product of N and R)

and thus

       R' = R - 2(N.R)N   (all you need to know to find R' is R and N)

______________________________________________________________________________
Steve Hollasch                                   Kubota Pacific Computer, Inc.
hollasch@kpc.com                                 Santa Clara, California
From: stgprao@st.unocal.COM (Richard Ottolini)
Newsgroups: comp.graphics.visualization
Subject: Re: Q: Volume rendering of points *not* on a grid
Date: 6 Oct 92 16:19:21 GMT
Article-I.D.: unocal.1992Oct6.161921.10775
Organization: Unocal Corporation

In article <1992Oct5.214710.208@mcshub.dcss.mcmaster.ca> pascal@nextasy.physics.mcmaster.ca (Pascal Gaudette) writes:
>
>Our group here at Mac is doing numerical simulation of
>astrophysical systems. We use a langragian hydrodynamical
>scheme. This means that our data is a set of points in 3D
>space that move and are NOT on any kind of grid. We would
>like to do some volume renderings of clouds of particles,
>color coding the rendering for, say, density, and also making
>the less dense parts more transparent. (Note: density is part
>of the output data, and does not have to be calculated.) 
>
>Can this be done using existing software? If so, what? (Does it run
>on SGI systems?)

Both AVS and SGI-EXPLORER have modules and data structures to do this.
Newsgroups: comp.graphics.visualization
From: stgprao@st.unocal.COM (Richard Ottolini)
Subject: Re: Databases for Visualization data?
Organization: Unocal Corporation
Date: Tue, 6 Oct 1992 16:32:49 GMT

In article <1992Oct6.021204.13460@afterlife.ncsc.mil> rmrohre@afterlife.ncsc.mil (Randile the Reptile) writes:
>
>	I haven't kept up with latest in viz databases
>but a few years ago the two leading contenders were:
>
>	- CDF (Common Data Format) from NASA Goddard
>
>	- HDF (Hierarchical Data Format) from NCSA (National Center for
>	                                    Supercomputing Applications) 
>
>I also seem to remember that there was a working group on viz data formats
>and viz databases that met at SIGGRAPH within the past couple years.
>I think that the minutes were published in one of the quarterly SIGGRAPH
>publications (not the conference proceedings).

A database contains "structures" for representing data plus methods for ordering
adding, deleting, modifying, and extracting the data within.  My main criticism
of the above two databases is that the data structures are multidimensional
grids rather than the broader set needed for scientific visualization.
The missing data structures are geometric/CAD, although in theory they can be
added as opaque chucks to the above databases.  I find that SGI-EXPLORER has
a rich set of data structures ecompassing both grids and geometry (AVS is reasonable too).
From: ruckman@oasys.dt.navy.mil (Christopher Ruckman)
Newsgroups: comp.graphics.visualization
Subject: Need help creating .HDF files on a PC
Date: 6 Oct 92 18:39:20 GMT
Reply-To: ruckman@oasys.dt.navy.mil (Christopher Ruckman)
Organization: Carderock Division, NSWC, Bethesda, MD

I recently got a copy of a MS Windows program from NCSA called Image.
It's primary function is to display raster images saved as .HDF files.  I
also got their subroutine library for creating .HDF files.  Unfortunately,
to compile the library I would need a C compiler in addition to my
FORTRAN compiler.

Does anyone know how I can get a compiled version that will work on
a 386 with MS FORTRAN 5.1?  Or ... where can I get a "free" C compiler?

Any help would be appreciated.
Newsgroups: comp.graphics.visualization
From: belaton@csgi60.dcs.leeds.ac.uk (B Belaton)
Subject: Re: IDL
Organization: School of Computer Studies, University of Leeds
Date: Sat, 3 Oct 1992 15:54:47 GMT
X-Posted-From: csgi60.leeds.ac.uk
NNTP-Posting-Host: sol.ctr.columbia.edu

In article <1992Oct3.092909.527@cine88.cineca.it>, lc1bocv1@cine88.cineca.it writes:
> I apologize for the FAQ, but can anyone explaine me what IDL is ?
> Thanks in advances to everyone.
> 
> fabrizio ravegnani
> lc1bocv1@cine88.cineca.it
> 
 IDL .... Interactive Data Language, recently its has been integrate with the
 IMSL product. A kind of script based (as opposed to visual programming based)
 visualisation package.

 bahari belaton
 belaton@scs.leeds.ac.uk
Newsgroups: comp.graphics.visualization
From: pascal@nextasy.physics.mcmaster.ca (Pascal Gaudette)
Subject: Q: Volume rendering of points *not* on a grid
Organization: McMaster University, Hamilton, Ontario.
Date: Mon, 5 Oct 1992 21:47:10 GMT


Our group here at Mac is doing numerical simulation of
astrophysical systems. We use a langragian hydrodynamical
scheme. This means that our data is a set of points in 3D
space that move and are NOT on any kind of grid. We would
like to do some volume renderings of clouds of particles,
color coding the rendering for, say, density, and also making
the less dense parts more transparent. (Note: density is part
of the output data, and does not have to be calculated.) 

Can this be done using existing software? If so, what? (Does it run
on SGI systems?)

If not, I guess that we will have to interpolate our data to a grid
"manually" first, before feeding it to a standard visualization package
like Explorer... Any tips/suggestions for a good interpolating algorithm?

Thanks for any help/info,
--
Pascal "The Rascal" Gaudette       pascal@nextasy.physics.mcmaster.ca
MacNUG president                      | *NeXTmail encouraged* 
graduate student, McMaster university | Je ne suis pas infaillible.
Physics and astronomy dep.            | Vive le Quebec LIBRE!
From: ruckman@oasys.dt.navy.mil (Christopher Ruckman)
Newsgroups: comp.graphics.visualization
Subject: Where can I get info on epiGRAF?
Date: 6 Oct 92 16:19:14 GMT
Reply-To: ruckman@oasys.dt.navy.mil (Christopher Ruckman)
Organization: Carderock Division, NSWC, Bethesda, MD

Anybody know where I can get more information on the visualization package
epiGRAF that has been discussed here recently?
From: g-kwok@cs.yorku.ca (Bernard Kwok)
Newsgroups: comp.graphics.visualization
Subject: Radiosity Package Available
Keywords: radiosity, ray tracing
Date: 30 Sep 92 19:18:50 GMT
Distribution: comp
Organization: York University, Dept. of Comp. Sci. - Toronto

In case there is any interest, I have placed a simple public-domain 
radiosity package that I wrote for my masters thesis.

AVAILABLE AT:

The package is available at the following anonymous ftp site:

	nexus.yorku.ca in /pub/reports/Radiosity_code.tar.Z

This site will be changed to ftp.yorku.ca in the near future.

THE PACKAGE:

The package contains C code for a progressive refinement solution
using the following algorithms:

	Wallace (Ray-traced form-factors), 
	Haines (Shaft Culling), using automatric hieriarchical 
	bounding creation (Salmon 87)
	Chen (Progressive refinement with jitter hemicubes)
	A partial implementation of Hanrahans BF-Refinement algorithm.
	
Additionally, there are model preprocessors for conversion from
QuickModel and OFF formats, with geometric contraints of Baum's
91 Siggraph paper partially included; and a scene walk through program
with simple Gouaraud shading.

The solution can be run stand-alone on any Unix box, but the walk-through
requires a SGI 4D.

Please feel free to gripe, fix, or (hopefully) improve :-) the package.
I intend to update the package with some new techniques from this years
papers, time providing.

DOCUMENTATION:

There is some basic documentation provided with the package, as well as
explantations of the algorithms used in my masters thesis, also posted
at the same site in /pub/reports/Radiosity_thesis.ps.Z

Anyways, hope this package is of some use.

(P.S. Just a plug for the graduate program at York: The York CS graduate 
program is new, but up and coming. For those interested, more thesis reports
should become available at the above site. Current there is, in addition,
Edith Li's "Shape from Rotation" thesis presented at this years Vision
Interface '92 conference in Vancouver.)

Cordially,

	Bernard Kwok
	g-kwok@cs.yorku.ca
	Department of Computer Science
	York University, Toronto, Canada.
Newsgroups: comp.graphics.visualization
From: bpb9204@tamsun.tamu.edu (Brent)
Subject: Re: Macintosh Software seeked
Keywords: macintosh, 3D
Organization: Texas A&M Univ., Inc.
Date: Sun, 27 Sep 1992 22:34:26 GMT

I'm interested in hearing about freely-distributable (public domain or
shareware) software that is available on the Macintosh to do graphics.
I'm specifically looking for 3D-related graphics programs.

If you are using something or writing software, please let me know
about it.  Also, what hardware requirements (RAM, math coprocessor)
the software has.

Also, what is this "vogl" that I've seen mentioned?  Is it portable
software and if so, is it available on the mac?

I appreciate any and all clues.

-Brent

-- 
------------------------------------------------------------------------------
Brent P. Burton, N5VMG                          Department of Computer Science
bpb9204@tamsun.tamu.edu                                   Texas A&M University
      What are typical family values?      Good buys at WalMart.
From: wirehead@thedeck.Eng.Sun.COM (Mark Koch)
Newsgroups: comp.graphics.visualization
Subject: Re: 3D visualization in XView
Date: 1 Oct 1992 21:02:33 GMT
Organization: Sun Microsystems
Distribution: world
Reply-To: wirehead@thedeck.Eng.Sun.COM
NNTP-Posting-Host: thedeck

Try XGL from Sun.  It is a 'C' based toolkit that runs great in Xview.
Talk to your Sun Sales rep. or call SunExpress to order it.


---
				____      _________
Mark Koch			\   \    /   __    \
Born again Hacker.		 \   \  /   /  \    | 
				  \   \/   /   /   /
wirehead@thedeck.Eng.Sun.COM	   \      /   /   /
				    \    /    \   \
				     \__/      \___\



Newsgroups: comp.graphics.visualization,comp.os.ms-windows.programmer.win32
From: rimelsjj@piston.detroit.ingr.com (Jim Rimelspach)
Subject: Re: Ray-tracers for Windows and Windows NT (existing and announced)
Organization: Intergraph
Date: Wed, 30 Sep 1992 18:58:12 GMT

In article <RUJO.92Sep28152342@ulrik.uio.no>, rujo@ulrik.uio.no (Rune J|rgensen) writes:
> 
> I tried a post on this subject in comp.graphics and I got a reference to
> RenderLib, but as I understand it, the package can do rendering/shading,
> but not ray-tracing. So, is there announced any ray-tracing application or
> OEM kit for Windows or Windows NT? (I got a lot of email from people who
> were looking for the same.)
> 
> -Rune Jorgensen
>  rujo@ulrik.uio.no

Intergraph has a software package called ModelView, which is Windows based 
ray-tracing package.  Includes features for animation and video in/out.
Newsgroups: comp.graphics.visualization
From: mikwe@isy.liu.se (Mikael Wedin)
Subject: 3D visualization in XView
Reply-To: mikwe@isy.liu.se
Organization: Linkoping University
Date: Wed, 30 Sep 1992 14:47:02 GMT

Hi !

I'm looking for a 3D-toolkit that works with XView. I have an application
that visualize colourspaces that I want to convert to 3D-visualization.

Any ideas, I don't want to port it to Athena and use Xaw3d.

Mail me.


O+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+O
O    Mikael Wedin                                    Email: mikwe@isy.liu.se O
O    Image Processing in Graphics Art                Phone: +46-13-281301    O
O    Department of EE                                Fax:   +46-13-282599    O
O    Link|ping University                                                    O
O    S-581 83 LINK\PING      "I'm dancing barefoot, heading for a spin       O
O    Sweden                   some strange music drags me in..." -N. Young   O
O+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+-oo-+O



Newsgroups: comp.graphics.visualization,comp.os.ms-windows.programmer.win32
From: rujo@ulrik.uio.no (Rune J|rgensen)
Subject: Ray-tracers for Windows and Windows NT (existing and announced)
Organization: University of Oslo, Norway
Date: Mon, 28 Sep 1992 14:23:42 GMT


I tried a post on this subject in comp.graphics and I got a reference to
RenderLib, but as I understand it, the package can do rendering/shading,
but not ray-tracing. So, is there announced any ray-tracing application or
OEM kit for Windows or Windows NT? (I got a lot of email from people who
were looking for the same.)

-Rune Jorgensen
 rujo@ulrik.uio.no
From: fowlerc@CS.ColoState.EDU (Christopher Fowler)
Newsgroups: comp.graphics.visualization
Subject: Graphic format algorithms
Date: 7 Oct 92 01:06:16 GMT
Distribution: usa
Organization: Colorado State University

I am looking for some basic algorithms for gif, mac, tif, and other 
common graphic formats.  If you have, or know where I can find these
algorithms and/or routines written in C, please send me some email.

            Thanks in advance,


            Christopher Fowler
            fowlerc@handel.cs.colostate.edu
                   (129.82.102.32)

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*  Chris Fowler ~  There are no problems - just interfaceing opportunities *
  Feel free to 'talk', 'finger', or 'mail' to me at anytime.              .
*        fowlerc@handel.cs.colostate.edu, fowlerc@129.82.102.32            *
Newsgroups: comp.graphics.visualization
From: stgprao@st.unocal.COM (Richard Ottolini)
Subject: Re: 3D visualization in XView
Organization: Unocal Corporation
Date: Thu, 1 Oct 1992 22:36:45 GMT

In article <lcmpr9INNn7m@exodus.Eng.Sun.COM> wirehead@thedeck.Eng.Sun.COM writes:
>Try XGL from Sun.  It is a 'C' based toolkit that runs great in Xview.
>Talk to your Sun Sales rep. or call SunExpress to order it.

This product runs only on Suns (it runs well).
It is essentially PHIGS without the database.
Sun is encouraging all graphics boards vendors to provide XGL drivers
and software vendors to use XGL routines and the other two Sun graphics libraries.
SunPEX, SunPHIGs, SunOpenGL are or will soon be written on top of XGL.
Use one of these other products if you want portability.
Xref: sparky comp.graphics.visualization:1420 comp.os.ms-windows.programmer.win32:1258
From: cp14@clark.edu (Will Pickering)
Newsgroups: comp.graphics.visualization,comp.os.ms-windows.programmer.win32
Subject: Re: Ray-tracers for Windows and Windows NT (existing and announced)
Date: 30 Sep 92 21:36:30 GMT
Article-I.D.: clark.1992Sep30.213630.18645
Organization: Clark College, Vancouver, Wa.  USA

In article <1992Sep30.185812.10065@piston.detroit.ingr.com> rimelsjj@piston.detroit.ingr.com (Jim Rimelspach) writes:
>In article <RUJO.92Sep28152342@ulrik.uio.no>, rujo@ulrik.uio.no (Rune J|rgensen) writes:
>> 
>> I tried a post on this subject in comp.graphics and I got a reference to
>> RenderLib, but as I understand it, the package can do rendering/shading,
>> but not ray-tracing. So, is there announced any ray-tracing application or
>> OEM kit for Windows or Windows NT? (I got a lot of email from people who
>> were looking for the same.)
>> 
>> -Rune Jorgensen
>>  rujo@ulrik.uio.no
>
>Intergraph has a software package called ModelView, which is Windows based 
>ray-tracing package.  Includes features for animation and video in/out.


Hi,  Also there is a new pacage called PLAYMATION for Windows.  This program
is a 3D Charactor Animation package.  It includes modeling, animation and 
ray-tracing tools.  The modeling uses patch-based spline construction which
allows for smooth organic animation.

For more info contact Hash Enterprises, 2800 E. Evergreen Bv, Vancouver WA
98661.  Or BBS (206) 574-5619

Will Pickering:  cp14@Clark.edu
Newsgroups: comp.graphics.visualization
From: spiff@bert.eecs.uic.edu (Jason Leigh)
Subject: Morphing distribution
Organization: University of Illinois at Chicago
Date: Sat, 3 Oct 1992 00:15:17 GMT

To everyone who recently got copies of the morphing package from me, please
email me back to get a new version of the program 'cross.c'.  There is a
bug in the version you currently have.

Thanks.

Jason


-- 
---------------------------------------------------------  ___
| The opinions expressed above are necessarily those of | \\     \\  | \\
| the Electronic Visualization Laboratory, NAAAT!       |  \\---  \\ |  \\
| Send Replies to: spiff@bert.eecs.uic.edu (Jason Leigh)|   \\____ \\|   \\____
Newsgroups: comp.graphics.visualization
From: kramer@ilight.com (Steve Kramer)
Subject: Color Postscript Printer
Organization: none
Date: Tue, 6 Oct 1992 18:01:28 GMT

I am interested in getting people's opinions about
Color Postscript printers.  Specifically, which printers
you would recommend for quality hard copies, and what
kind of speed I can expect?

Thanks in advance for you advice.

Sincerely,

Steve Kramer
kramer@ilight.com

Newsgroups: comp.graphics.visualization
From: m23141@mwunix.mitre.org (Patrick Jones)
Subject: Mac Visualization ?
Summary: What 3D Mac visualization software is available
Keywords: 3D visualization
Organization: The MITRE Corporation
Date: Tue, 29 Sep 1992 13:35:36 GMT

	What 3D visualization software is available on a Mac?  I know about
Spyglass.  My problem is I have 3D volumemetric data underground, I also
have vector maps on the ground surface.  I would like to be able to show
both at the same time.  Also I would like to show my wells which are going
into the ground (also vectors).


					Thanx,


					Patrick Jones
					plj@mitre.org
					(703)-883-1761
Newsgroups: comp.graphics.visualization
From: hirt@itsnova.mach.uni-karlsruhe.de (Markus Hirt)
Subject: Re: satellite pics
Organization: Institut fuer Thermische Stroemungsmaschinen, Uni-Karlsruhe
Date: Tue, 29 Sep 1992 18:02:33 GMT


> Does anyone know of an ftp site with any kind of pics of satellite photos of
> the US or other countries? any format would be fine.
>
> Dan Pape

Look into the FAQ of sci.geo.meteorology, recently posted 
in news.answers as 'Sources of Meteorological Data FAQ'

--
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Markus Hirt				 + hirt@itsnova.mach.uni-karlsruhe.de +
+ Institute for Thermal Turbomachinery	 +                                    +
+ University of Karlsruhe, Germany	 +                                    +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++




Newsgroups: comp.graphics.visualization
From: paulf@halcyon.com (Paul Forgey)
Subject: ?:Bouncing a ray off a sphere
Organization: Northwest Nexus Inc. (206) 455-3505
Date: Fri, 2 Oct 1992 22:33:57 GMT

I have a fairly simple question:

Given ray heading (in normalized vector) <x, y, z> and
Given intersection point on a sphere (x, y, z)

How do you compute the new ray vector <x, y, z> ?
It doesn't appear to be as simple as I thought!

-paulf@halcyon.com
From: lakerb@rcwusr.bp.com
Newsgroups: comp.graphics.visualization
Subject: Re: Macintosh Software seeked
Date: 28 Sep 92 09:42:14 -0500
Organization: BP Research, Cleveland, OH (USA)

In article <1992Sep27.223426.16096@tamsun.tamu.edu>, bpb9204@tamsun.tamu.edu (Brent) writes:
> I'm interested in hearing about freely-distributable (public domain or
> shareware) software that is available on the Macintosh to do graphics.
> I'm specifically looking for 3D-related graphics programs.
> 
> If you are using something or writing software, please let me know
> about it.  Also, what hardware requirements (RAM, math coprocessor)
> the software has.
> 
> Also, what is this "vogl" that I've seen mentioned?  Is it portable
> software and if so, is it available on the mac?
> 
> I appreciate any and all clues.
> 
> -Brent
> 
> ------------------------------------------------------------------------------

Here's what I find on my system:

Mac Gnuplot   Readme file indicates it came from brentb@cs.tamu.edu 10/91

Mac DIGS      A library of C routines for doing line drawings and polygon
		fills in 2 and 3 dimensions.  3/91 
		ocas@godzilla.cgl.rmit.oz.au

CGM Plot

DKBTrace	Ray tracer.  dbuck@ccs.carleton.ca

POV-Ray		Persistence of Vision ray tracer.  jimn8@aol.com

The Archie archive directory server should tell you where you might find
these on the Internet.

There are also several new commercial packages for 3-D visualization that
appear to be quite useful.

Rob Lake
BP Research
lake@rcwcl1.dnet.bp.com