HDTenEightyP/NetNews huggingface dataset:
From: mystical@nmt.edu (Gurupartap Davis)
Newsgroups: comp.graphics
Subject: Re: Fractint and POV
Date: 11 Nov 92 17:34:36 GMT
Article-I.D.: nmt.1992Nov11.173436.12818
Organization: New Mexico Tech

In article <taudas.721352948@ais.org> taudas@ais.org (Tony Audas) writes:
>take one of the sample .pov files ( i use axis.pov) and delete the parts you
>don't want and add your own objects. i have found that this is the best way
>to get a 'feel' for the system.  the output of the fractint 3d menu function
>can be traced by pov.

I would suggest you use the height field option rather than the 3d output
option, forspeed and size considerations.  if you are using, say, a 1024x768
fractal pic, the 3d output will be several megabytes, because the 3d output
option creates 2 triangle objects for each pixel.  If you use the GIF file,
(or even better, a POT 16bit gif) you can get the same effect, plus you can 
change the height scaling and stuff without going through fractint again.
The reason the POT files work so much better than GIFs is because you can have
32k color values, which makes much smoother output than 256 colors.

Partap
mystical@jupiter.nmt.edu

-- 
------------------------------------------------------------------------------
Gurupartap Davis         |I don't have any employers, and if I did, they
mystical@jupiter.nmt.edu |probably wouldn't care about my opinions.
------------------------------------------------------------------------------
From: Don_-_Hirschfeld@cup.portal.com
Newsgroups: comp.graphics
Subject: Re: Need 24 bits picture
Date: Sat,  7 Nov 92 12:40:12 PDT
Organization: The Portal System (TM)

I would also apprecaite FTP sites for rendered or raytraced images from all 
platforms in .tga or .tif format. So far I've seen very few around. If you are
proud of your work, please upload those images! I would also like to see
high quality textures uploaded.
Newsgroups: comp.graphics
From: x14@aix530b.urz.uni-heidelberg.de (Helmut Beisel)
Subject: Re: Visual Force Detection in Landscape
Keywords: making GPLOT
Organization: University of Heidelberg, Germany
Date: Thu, 12 Nov 92 14:21:00 GMT

hi,

I tried to make Gplot4.3b2 from calpe.psc.edu on my IBMRS6k (AIX3.2.2) and
I came out with unresolved  symbol: foreground  - if I use the IRIS GL DRIVER
igl.o . Any suggestion where I can find this symol or am'I wrong elsewhere ?

Thanks for help!
Helmut Beisel
From: bvh@cse.unl.edu (Obi-Wan)
Newsgroups: comp.graphics
Subject: Re: Drawing in the background.
Date: 10 Nov 1992 02:28:03 GMT
Organization: MicroImages, Inc.
Distribution: world
NNTP-Posting-Host: cse.unl.edu

In article <BxF4t6.AuF@CAM.ORG>, gelinas@CAM.ORG (Daniel Gelinas) writes:
> The goal of my program( in C) is to draw
> 4 laser beams(one from each corner of the screen) shooting out and
> spelling a word.  My only problem is when I try to do this normally
> I have to use 1 function to draw a line in green, and then I use the
> same function to draw another line in black.  This way the laser beam
> s can move around.  That's all fine and dandy but it won't work with
> 4 laser beams because when I write over them in black it also writes
> of everything else on the screen.

Dan,

I'm assuming you have the ability to draw by XORing the current screen
pixels with another value.  Xor has the nifty property that when you
xor A and B to get C, if you then xor B and C you get A again.  Many
programs don't actually overwrite the current screen values, they just
xor them with some value to draw the line, then xor them again with
the same value to get the previous pixel value back again.

To draw in a specific color, you first xor your expected background color
with the color you want to draw with.  The resulting pixel value is the
value you should xor with the background in order to produce your drawing
color.

Whenever 2 lines that are "drawn" in different colors cross, the resulting
color might be kind of strange, but you can be assured that erasing one
of the lines will leave behind the correct color.

Sorry if this doesn't sound too clear, let me know.  It really doesn make
sense when explained well!

				-- Obi-Wan

-- 
 |\_/|  AACK! ||  Genius may have its   ||  "Obi-Wan" (Ben Hollingsworth)
\'o.0'/       ||  limitations, but      ||  MicroImages, Inc.  Lincoln, Nebraska
=(___)=       ||  stupidity is not thus ||  University of Nebraska - Lincoln
   U   PTHAT! ||  handicapped.          ||  email:  bvh@cse.unl.edu
Newsgroups: comp.graphics
From: bbrown@infonode.ingr.com (Bailey Brown)
Subject: Re: N bit planes/pixel or N bits/pixel?
Organization: Intergraph Corporation, Huntsville, AL.
Date: Thu, 12 Nov 1992 20:11:26 GMT

tgl+@cs.cmu.edu (Tom Lane) writes:

>The other main reason for bitplane hardware is that it takes up less address
>space in cases where you don't have exactly 8, 16, or 32 bits/pixel; there
>aren't unused bits in every byte.  On real computers with 32-bit or better
>address spaces, this isn't much of a concern, but on PCs it is a big issue.

A 386 or 486 PC is a real computer with a 32bit address space.

>A PC video card driver has to do bank-swapping to get at all of the card's
>memory, so avoiding holes in the address space translates directly to fewer
>banks, less swapping.  Of course we all know that PCs are brain-damaged in
>every possible way, especially so in video hardware...

Then why do I have a $160 accelerated 640x480x24bit video board
in my pc (that also does 800x600x15bit, 1024x768x8bit and
1280x1024x4bit, and this baby can do pattern fills at
50 megabytes/sec), while I keep hearing Mac users whining about
having to pay $450 for a 640x480x24bit dumb frame buffer?
Sure, dos is brain damaged, but PCs are not (anymore).  You
can't beat them for bang for the buck in the low (less than $5000) end.

------------
Bailey Brown                               "Above all else, confusion reigns."
Intergraph Corporation                                  
bbrown@casca.b11.ingr.com                              Procol Harum
Newsgroups: comp.graphics
From: eb7018677@ntuvax.ntu.ac.sg
Subject: Re: Looking for Permissible Color Scale & JND Info.
Organization: Nanyang Technological University - Singapore
Date: Wed, 11 Nov 1992 10:55:15 GMT

To anyone,
	I'm presently involved in a project that need to generate a color
scale. I need information on how to determine whether the step from a color (in
RGB),c, to another color ,c', can occur in some Permissible Color Scale.  Also 
how to measure the change in terms of Just Noticeable Differences(JNDs) caused 
by moving from the color c to the color c'. Note that the JND information here
is based on the CIELUV Uniform Color Space (UCS).

	Those of you who have experienced in the abovementioned concept, please
write to me, or better still, send me the source code.

	My internet add is : eb7018677@ntuvax.ntu.ac.sg
	My bitnet add is : eb7018677.bitnet

Yoke Chian.
Newsgroups: comp.graphics
From: rsc@altair.csustan.edu (Steve Cunningham)
Subject: Re: SIGGRAPH Journal out?  Haven't received mine.
Organization: CSU Stanislaus
Date: Tue, 10 Nov 92 00:26:57 GMT

brianm@sco.com (Brian Moffet) says/asks:

> I have received the proceedings of the SIGGRAPH 92 "faire", but I haven't
> received the normal journal that supposed to come out.
> 
> I had heard that they were doing a review of recording options for
> computer graphics, which piqued my interest.

Hmmmm... this note piques mine a bit.  I assume "faire" ::= conference,
and indeed the SIGGRAPH '92 conference proceedings have been in the mail
for a couple of weeks now (and thanks to everyone for your patience with
the delays).  If "normal journal" means the standard issues of Computer
Graphics, these went into the mail a week after the proceedings and have
started hitting the mailboxes, at least on the U.S. east coast.  Mine has
not come yet, but I live on the SunsetSide of the continent.  But I'm not
at all sure what "recording options for computer graphics" means; the issue
that's just now out is focused on scientific visualization at the regional
level (i.e. no articles from the national centers) and includes an article
on video output, so perhaps that's what Brian means.  At any rate, if you're
a SIGGRAPH member, watch for yours Real Soon Now.

-- Steve Cunningham
Newsgroups: comp.graphics
From: sloan@cis.uab.edu (Kenneth Sloan)
Subject: Re: polyhedron/polyhedron intersection
Keywords: 3d graphics, intersection
Organization: CIS, University of Alabama at Birmingham
Date: Thu, 12 Nov 1992 01:19:52 GMT

In article <2371@usna.NAVY.MIL> dfr@usna.navy.mil (PROF D. Rogers (EAS FAC)) writes:
>In article <1992Nov11.040142.9570@cis.uab.edu> sloan@cis.uab.edu (Kenneth Sloan) writes:
>!In article <1992Nov10.221943.18792@sophia.smith.edu! orourke@sophia.smith.edu (Joseph O'Rourke) writes:
>!!In article <1992Nov10.192804.13981@zip.eecs.umich.edu! katkere@engin.umich.edu writes:
>!!!I am looking for code/ideas for finding if two polyhedrons intersect.
>!!
>!!@article{CD
>!!, author =	"B. Chazelle and D. P. Dobkin"
>!!, title =	"Intersection of convex objects in two and three dimensions"
>!!, journal =	"J. ACM"
>!!, volume =	34
>!!, year =	1987
>!!, pages =	"1--27"
>!!}
>!
>!But Joe...what if the polyhedra aren't convex?  
>
>Make them convex!!

Well, PROF Rogers, that may be the Navy way, but it's not the right way.
It's not even the *wrong* way.

Is it possible that someone on comp.graphics has finally posed a
question which cannot be answered by citing an ISBN number?

Here's a nice simple question to keep everyone occupied (sit down Joe -
this one's not for you).  

GIVEN an arbitrary, simple polyhedron, P.

FIND the largest (greatest volume) convex polyhedron completely
contained in P.




-- 
Kenneth Sloan                   Computer and Information Sciences
sloan@cis.uab.edu               University of Alabama at Birmingham
(205) 934-2213                  115A Campbell Hall, UAB Station 
(205) 934-5473 FAX              Birmingham, AL 35294-1170
From: scotts@math.orst.edu (Scott Settlemier)
Newsgroups: comp.graphics
Subject: REQUEST: Options for true color on pc compatibles
Date: 11 Nov 92 20:13:41 GMT
Article-I.D.: news.BxKIuw.9qz
Organization: Oregon State University Math Department

I'm having lots of difficulty determining just what my options are for
diplaying realistic images. I had thought that it would just be a matter
of going out and buying one of the new vga cards that can display 24 bit
deep images, but no one that I've talked to yet knows the complete list
of such cards, their capabilities (specifically resolutions and their
maximum number of colors per pixel.) and prices. And to confuse me more
there is some question as to the "chip" that drives the card, another
question as to whether the card can drive all types of monitors, and yet
another as to whether you even need 16.7 million colors in such low
resolutions. Can anyone make a comprehensible summary of the options?

(Specifically, I'm really interested in one of the 24bit cards still so
what are they and what resolutions can they do at 24bits per pixel?)

Please email me and I'll collect and post a summary of what I get, or post
if you think it warrants so.
Thanks folks.
Newsgroups: comp.graphics
From: L618347@LMSC5.IS.LMSC.LOCKHEED.COM
Subject: RGB to PICT Conversion
Organization: Lockheed Missiles & Space Company, Inc.
Date: Fri, 13 Nov 92 16:09:54 GMT

I have raw RGB data (eight bit) at 1024 x 1024 resolution that I would
like to convert into Macintosh PICT format.  Does anyone have anything
that converts RGB to PICT?  I would prefer uncompiled C or FORTRAN.  I
need to incorporate RGB to PICT conversion into an IBM
mainframe environment.

Thanks
-tom
L618347@lmsc5.is.lmsc.lockheed.com
Newsgroups: comp.graphics.avs
From: schiano@vega.acs.uci.edu (Allen V. Schiano)
Subject: Manipulating geometries as input
Newsgroups: comp.graphics.avs
Reply-To: schiano@vega.acs.uci.edu (Allen V. Schiano)
Organization: University of California, Irvine
Keywords: AVS geoms, input
Date: 6 Nov 92 20:44:13 GMT


  We're contemplating creating a module that is supposed to read an
AVS geometry from other modules, extract the vertices (we're assuming that it's a POLYLINE type), and compute some shaping information.

Question:  Can we do this?  I know we can bring a GEOM in as input but there
don't seem to be any calls in the GEOM library to extract data from the edit list.
I know it can be done because how would the TUBE module work without this!
We run AVS on a variety of machines (all at AVS4 or ConvexAVS 3.9).  ANybody
have any experience with this?

			Allen
Newsgroups: comp.graphics.avs
From: avs@ncsc.org (Terry Myerson)
Subject: New module at IAC
Organization: North Carolina Supercomputing Center
Date: Thu, 5 Nov 1992 15:02:32 GMT

Name        : string_example  Version      : 1.000     Mod Number : 1553 
Author      : Larry Gelberg, Advanced Visual Systems
Submitted   : 11/05/92        Last Updated : 11/05/92  Language   : C        
Ported to   : DEC Kubota Convex HP IBM
Description : The string example module sends a single user-specified
              filename string to one or more string parameter ports on one
              or more receiving modules. Its purpose is to allow you to
              simultaneously control filename parameter input to more
              than one module using only a single File Browser input
              widget. This code was based on the AVS "file browser"
              module.
-- 
International AVS Center
North Carolina Supercomputing Center
avs@ncsc.org
From: wes@ux6.lbl.gov (Wes Bethel)
Newsgroups: comp.graphics.avs
Subject: Re: Hedgehog,Streamlines, et. al.
Date: 13 Nov 1992 16:40:03 GMT
Organization: Lawrence Berkeley Laboratory
Reply-To: wes@ux6.lbl.gov (Wes Bethel)
NNTP-Posting-Host: ux6.lbl.gov

In article <1992Nov11.182829.13248@sol.ctr.columbia.edu> larryg@avs.com (Larry Gelberg) writes:
>There is no 'straight-forward' way of doing what you're looking for
>because of all the squid-brained restrictions on field data types
>that hedgehog imposes on both the input field as well as the sampler
>field, but here is an ugly work-around for you. 
>

There is a way cool module at the IAC called "show flow", courtesy
of Phil McDonald (NOAA/ERL/Forecase Systems Lab) which has no such
input restrictions (at the expense of some of the flexibility gained
by using the samplers module), does a pretty good job of generating
vector glyphs.  It is a pain in the wazoo to compile though, what
with subdirectories and libraries and what-not.

I recently used this module as part of a visualization of turbulence
in a combustion experiment (I finally get to get that pyro-tech bug
out of my system!!! ;-) ;-).  It works great.

wes
From: prokop@soft14.acri.fr (Marc Prokop)
Newsgroups: comp.graphics.avs
Subject: Re: Reduced colors warning due to .Xdefaults pec
Date: 5 Nov 92 15:15:48 GMT
Reply-To: prokop@soft14.acri.fr
Organization: Sun Microsystems, Inc.


Could somebody e-mail me the ftp site (Internet address) for the AVS group FAQ.

Thanks

Marc
prokop@acri.fr
From: tony@syzygy.co.uk (Tony Ford)
Newsgroups: comp.graphics.avs
Subject: read_dyna3d
Date: 13 Nov 92 10:55:50 GMT
Reply-To: tony@syzygy.co.uk
Organization: Meiko Scientific.

Hi AVS'ers,


We're currently trying to port this module (from IAC) to AVS 4.0 on 
a Sun. After getting the thing to compile and behave itself we are
stuck at the point of loading the module. The process never seems to 
get into the module description procedure, although 'ps' shows that 
it does start to execute. 

Has anyone else tried to port this, why is it getting nowhere. 
Any input would be appreciated.

Of course, if we get this thing going we'll resubmit it to IAC.

Regards Tony.

--

my .sig module is in for a service.
Newsgroups: comp.graphics.avs
From: larryg@avs.com (Larry Gelberg)
Subject: colormap ramp not linear?
Organization: Advanced Visual Systems Inc.
Date: Thu, 5 Nov 1992 21:18:49 GMT
X-Newsreader: Tin 1.1 PL4
X-Posted-From: aurora.avs.com
NNTP-Posting-Host: sol.ctr.columbia.edu

A recent net inquiry asked about the apparent non-linearity of the
alpha channel in the default colormap.  You are correct, sir!  We 
initially had a linear hue and opacity ramp, but early on discovered
that we wanted more 'sensitivity' in the lower range than was afforded
by the linear ramp so we replaced it with a logrithmic one.  

Unfortunately, there is an outstanding bug in that it is DRAWN as a
linear map.  What should probably be the case is (a) having the option
for linear vs. logrithmic mapping and (b) regardless, displaying it
the correct way.   We're sorry if this is a real annoyance to you - 
hopefully it'll be fixed in AVS5.  But at least your suspicions are 
right on.

larryg

--
=== Larry Gelberg ============================ larryg@avs.com =======
      Advanced Visual Systems Inc. (AVS Inc.)
      300 Fifth Ave, Waltham, MA 02154
===== Tel: 617-890-4300 = Fax: 617-890-8287 =========================
From: prokop@soft14.acri.fr (Marc Prokop)
Newsgroups: comp.graphics.avs
Subject: AVS newsgroup FAQ
Date: 5 Nov 92 16:16:36 GMT
Reply-To: prokop@soft14.acri.fr
Organization: Sun Microsystems, Inc.

Could somebody e-mail me the ftp site (Internet address) for the AVS newsgroup FAQ.

Thanks

Marc
prokop@acri.fr
Newsgroups: comp.graphics.avs
From: ykrz08@rhrk.uni-kl.de ()
Subject: Problems with testing AVS (testlicense)
Followup-To: ykrz08@rhrk.uni-kl.de
Organization: University of Kaiserslautern, Germany
Date: Thu, 5 Nov 1992 13:44:06 GMT

Hello AVS users

We have irregulare points in 3D space and want to display
them with mesh or surface and contour.
How can I read them, and manipulate them, that I get the wished
picture?
Thanks for your help. 

Best regards
Dr. Reinhard Corr
From: rcion@rw5.urc.tue.nl (Ion Barosan)
Newsgroups: comp.graphics.avs
Subject: ucd-contour lines
Date: 9 Nov 92 10:41:59 GMT
Reply-To: rcion@urc.tue.nl

Hello all,

I have been working for a while with UCD structures but I don't see
a way to produce a contour plot and a vector plot of a 2D slice from
a UCD structure.

My UCD structure is a 3D structure having one 3-element vector
component(velocity_x, velocity_y, velocity_z).
I want to extract 2D slices from the UCD structure, and to produce
a contour and a vector plot of the slices.


Is there a module(s) which can help me to do this, or another
way of approaching the problem using the AVS's available modules ?

Thanks in advance,

- Ion Barosan.


-- 
internet: rcion@urc.tue.nl      | Ion Barosan         Room  RC 1.88
fax:      +31 (0)40 434438      | Eindhoven University of  Technology
phone:    +31 (0)40 472154      | P.O. Box 513, 5600 MB Eindhoven, NL
Newsgroups: comp.graphics.avs
From: ykrz08@rhrk.uni-kl.de (Reinhard Corr)
Subject: Hilfe beim Arbeiten mit einer Testlizenz von AVS
Organization: University of Kaiserslautern, Germany
Distribution: de
Date: Fri, 13 Nov 1992 14:49:52 GMT



Liebe AVS-Nutzer!


Jeder faengt mal klein an. Ich weiss aber nicht, ob man alleine mit AVS
ueberhaupt anfangen kann. 

1.) Ich habe Messdaten, irregulaer ueber eine XY-Flaeche verteilt und moechte
sie als Netz oder Flaeche im Raum darstellen.
2.) Ich moechte die eingelesenen Daten mittels eines Filters manipulieren
koennen. Wie haengt man also eigene Routinen in AVS ein.

Wer Zeit hat soll sich bitte melden, damit ich telefonisch oder per e-mail
Kontakt aufnehmen kann. Wer ist von AVS so begeistert, dass er fuer AVS
Tester ebenfalls begeistert?

Vielen Dank im voraus.

Mit freundlichen Gruessen
Dr. Reinhard Corr

Tel.: 0631/205-3075
e-mail: ykrz08@rhrk.uni-kl.de
From: hsu@crl.dec.com (William Hsu)
Newsgroups: comp.graphics.avs
Subject: Re: Custom User Interface to AVS
Keywords: AVS, User Interface,
Date: 13 Nov 92 17:29:03 GMT
Organization: DEC Cambridge Research Lab

Yes, Jeff Saltz at DEC's Paris Research Lab has used AVS to model financial data.
The people he showed it to didn't like the "techie" look of AVS, so Jeff replaced
the interface with Motif widgets.  It's a bit more programming, but you do what you
gotta do in order for people to use your work.

William
Newsgroups: comp.graphics.avs
From: larryg@avs.com (Larry Gelberg)
Subject: Re: Problems with testing AVS (testlicense)
Organization: Advanced Visual Systems Inc.
Date: Fri, 6 Nov 1992 13:33:48 GMT
X-Newsreader: Tin 1.1 PL4
X-Posted-From: aurora.avs.com
NNTP-Posting-Host: sol.ctr.columbia.edu

ykrz08@rhrk.uni-kl.de () writes:
: We have irregulare points in 3D space and want to display
: them with mesh or surface and contour.
: How can I read them, and manipulate them, that I get the wished
: picture?

AVS5 (entering beta soon) has a module called 'scatter to ucd' which
performs a Delauney 'triangularization' to derive a set of tetrahedra
from randomly scattered data points in 3-space.  This sounds like it
would do the trick for you.  There are no AVS5-specific requirements 
on this module so it should be able to run under AVS4 easily.  Please
contact your support group (Vistec? KPC? AVS Inc?) to have them help
you get ahold of it.

larryg

--
=== Larry Gelberg ============================ larryg@avs.com =======
      Advanced Visual Systems Inc. (AVS Inc.)
      300 Fifth Ave, Waltham, MA 02154
===== Tel: 617-890-4300 = Fax: 617-890-8287 =========================
Newsgroups: comp.graphics.avs
From: luca@ncsc.org (Tony Luca)
Subject: AVS ucd data
Keywords: ucd data
Reply-To: luca@ncsc.org (Tony Luca)
Organization: North Carolina Supercomputing Center
Date: Tue, 10 Nov 1992 19:15:16 GMT

	I am working on a module that reads data from a file and loads 
it into a ucd structure.  The data seems go into the structure ok and 
I can look into the structure using dbx and see that all the data
is there.  However, when I try to retrieve the data using a ucd get function
such as UCDstructure_get_node_positions() the module aborts with a
segmentation 
fault.  This also happens to any downstream modules of I remove the get
function
from my own code ( except for the "print ucd" module, which seems to like 
everything just fine, probably because it does use any of get functions
to access the data).  Does anybody out there have clue as to what I am
doing wrong to cause this problem? 


Newsgroups: comp.graphics.avs
From: tbowman@nmsu.edu (Todd Wayne Bowman)
Subject: display tracker 2d
Organization: New Mexico State University
Date: Wed, 11 Nov 1992 20:20:37 GMT

I am trying to port the module "display tracker 2d", (track2d) to a
gs2000 and I am running into some problems.  The module does the following
things before it dies:
          
         -accepts the image
         -creates a window of the size of the picture.
It doesn't go any farther than that.  If someone has done this port
before and knows the solution to the problem, I would greatly appreciate
your assistance.  Or if there is an alternative module that outputs 
cursor positions inside an image could someone tell me where is located.

Thank you very much.

Todd Bowman
tbowman@nmsu.edu
From: bolstad@blad.rtpnc.epa.gov (Mark Bolstad)
Newsgroups: comp.graphics.avs
Subject: Hedgehog,Streamlines, et. al.
Date: 10 Nov 92 16:25:29 GMT
Article-I.D.: rtpnc.1992Nov10.162529.22316
Organization: United States Environmental Protection Agency


So, why is this so hard:

All I want to do is step the hedgehog release points through the grid.
I've read up on the samplers module, but it still doesn't seem to do 
what I would like.

Is there a way to take the output from ortho slicer torque it into
sampler, and feed those points to hedgehog?  When I try this, the
hedgehog object doesn't move.  Maybe this is because the output of
ortho is 2D and samplers wants a 3D.

It seems like a simple thing to do, or am I being a bozo?

Thanks,
Mark
Newsgroups: comp.graphics.avs