HDTenEightyP/NetNews huggingface dataset:
From: pecquet@ohstpy.mps.ohio-state.edu
Newsgroups: comp.graphics.explorer
Subject: Re: WriteImg SGI, How???
Date: 25 Aug 92 17:09:33 GMT
Article-I.D.: ohstpy.13498.2a9a310d

In article <BtJHEw.Dzz@news.larc.nasa.gov>, matthias@nimbus.larc.nasa.gov (Larry Matthias) writes:
> 	Sorry everybody I thought the tools were from

After a bit of experimentation, I got WriteImg to work, but _only_ for 
lattices with nDataVar = 3 (i.e. an RGB lattice).  Lattices with less 
"variables/node" or whatever they officially call it (conceptually "layers" 
makes better sense in our applications) cause segmentation faults, lattices 
with more (ARGB, etc.) have the wrong colors.  So I wrote a small module to 
convert to this format, it being faster than trying to determine if any of 
the supplied modules would do this...
-Joseph
pecquet@mps.ohio-state.edu
pecquet@ohstpy.bitnet
From: colovas@ohstpy.mps.ohio-state.edu
Newsgroups: comp.graphics.explorer
Subject: Fourier filters?
Date: 27 Aug 92 16:38:08 EDT

Does anybody know if there are modules available for simple Fourier transform
filtering, like high-pass, low-pass, notch,etc..., and if there are, where can
I get them?
Thanks,
Pete 
Newsgroups: comp.graphics.explorer
From: salter@ucs.ubc.ca (Helen Salter)
Subject: Synchronized slicing of multiple lattices
Organization: University of B.C. Computing Services
Date: Tue, 25 Aug 1992 22:16:45 GMT

I am trying to look at a very large data set (164,344 nodes) representing
fuel concentrations in a pulp boiler. The data consists of 9 "zones",
stacked horizontally, each of which is a perimeter lattice, with
lattice dimensions varying from zone to zone.

I have read the first 3 zones into perimeter lattices, and can slice them
individually using OrthoSlice. I have also tried reading them in as
curvilinear lattices and slicing them with ProbeLat. This is okay, except
I don't really understand how the Transform Input to ProbeLat works.

Anyway, what I *really* want to do is have a single slicer
(or several syncronized slicers) slice through the entire data set,
based on the coordinates of the slicer and showing the resolution of 
each of the lattices that make up the data.

I thought about converting the data set to a pyramid lattice, but I 
don't think our 32Meg machine could handle it.

Any ideas? Am I missing something obvious?

Helen Salter, Visualization Support, Computing Services
University of British Columbia, B.C. Canada.


Newsgroups: comp.graphics.explorer
Subject: Synchronized slicing of multiple lattices
Summary: 
Expires: 
References:
Followup-To: 
Distribution: 
Organization: University of B.C. Computing Services
Keywords: OrthoSlice ProbeLat Curvilinear

I am trying to look at a very large data set (164,344 nodes) representing
fuel concentrations in a pulp boiler. The data consists of 9 "zones",
stacked horizontally, each of which is a perimeter lattice, with
lattice resolution varying from zone to zone.

I have read the first 3 zones into perimeter lattices, and can slice them
individually using OrthoSlice. I have also tried reading them in as
curvilinear lattices and slicing them with ProbeLat. This is okay, except
I don't really understand how the Transform Input to ProbeLat works.

Anyway, what I *really* want to be able to do is have a single slicer
(or several syncronized slicers) slice through the entire data set,
based on the coordinates of the slicer and showing the resolution of 
each of the lattices that make up the data.

I thought about converting the data set to a pyramid lattice, but I 
don't think our 32Meg machine could handle it.

Any ideas? Am I missing something obvious?

Helen Salter, Visualization Support, Computing Services
University of British Columbia, B.C. Canada.




-- 
Helen Salter; salter@ucs.ubc.ca; 
Visualization Support, Computing Services;
University of British Columbia, Canada
From: robert@texas.asd.sgi.com (Robert Skinner)
Newsgroups: comp.graphics.explorer
Subject: Re: HELP: Displace 1D Lat -> 2D?
Date: 3 Sep 92 23:58:04 GMT
Reply-To: robert@sgi.com
Organization: Silicon Graphics Inc., Advanced Systems Division

In article <1992Aug20.122428.1193@ciit85.ciit.nrc.ca>, Dick Jackson <Dick_Jackson@qm.ibd.nrc.ca> writes:
|> Hello, seasoned Explorers:
|> 
|> I may be missing something obvious, but here's what I'm trying to do:
|> 
|> First, the rationale:
|> It seems easy enough to turn a 2D Lattice of values into a 3D surface,
|> by putting the same Lattice into the Function and Displacement of a
|> DisplaceLat module.  (fine example: korea.z)
|> 
|> I have a 1D Lattice of values (intensity values of a spectrum), which
|> I want to see as a curve in space.  The Help for DisplaceLat would
|> make you think that it would have the same kind of effect as above,
|> pushing the line into the 2nd dimension.
|> 
|> To try this, I put two GenLats with 2D outputs into DisplaceLat ->
|> LatToGeom -> Render, and I got some great 3D surfaces (it helps to
|> put the Function lattice straight to Render too!).  But changing
|> the GenLats to 1D (with DataVec Length=1) gives me a straight line!
|> (DataVec Length of 2 can push the points NON-orthogonally into one
|> plane, but I want orthogonal displacement by scalar values!)
|> 
|> Help!  And thanks in advance!
|> 

You are right.  This is one of the things I hope to fix soon.
DisplaceLat tries hard to one of two functions, depending on its input
data.  As a result it (me, really) gets confused, doesn't do everything
right (as in your example), or keeps you from doing something useful.
DisplaceLat should be replaced with 2 modules:  HeightFieldLat (change coords
from N-D to N+M-D -- what you want), and OffsetLat (displace each point
non-orthogonally).

I hope to write those modules soon, but I can't make any promises about
when I acutally can.  I can send you the source to DisplaceLat with
a pointer about where I think you can patch the problem.  If so, reply
by email.

-- 

Robert Skinner
robert@sgi.com

	"The sendmail configuration file is one of those files that
	looks like someone beat their head on the keyboard. After
	working with it... I can see why!"

				-- Harry Skelton (harry@usrgrp)
From: dpr@ohm.york.ac.uk (David Rossiter)
Newsgroups: comp.graphics.explorer
Subject: repetitive render redraw ...
Keywords: render sgi explorer redraw
Date: 25 Aug 92 16:35:05 GMT
Organization: Electronics Department, University of York, UK

I can't stand it any more.... my 'render' module is obsessed with redrawing.
Can anyone help me?

Here's an example. If I have the render window at the usual expanded
size, say, 20% of the screen, and then I hit the maximise button in
the top right hand corner, I get the following:

- window expands to cover entire screen (as usual)
- in top left hand corner of window, at the same width and length as
the render window was BEFORE expanding, I get TWO complete redraws.
- THEN render redraws at the proper size.

By 'redraw' I don't mean a nice quick bit dump of the previous
screen area contents, I mean a complete geom to render
transformation. With small data sets, I wouldn't care, but now that 
I'm onto several lattice plains represented in a 3D structure, with
around a minute rendering each time, I'm getting a little tired... 

Much the same happens if I press the right mouse button for the render
menu. Render doesn't seem to have the intelligence to grab the
screen RAM before putting up the menu, and then transferring it back when
the menu pops-down. No, it has to do a complete redraw!

Surely this activity is completely unnecessary? Is there ANY way to 
stop this over-eagerness on the part of render? 

Please help! I'm thinking of start a self-help group called
'renderers anonymous'.

Dave
From: williams@casbah.acns.nwu.edu (Gus Williams)
Newsgroups: comp.graphics.explorer
Subject: Image data on 3D model (How?)
Date: 1 Sep 92 22:53:15 GMT
Organization: Northwestern University, Evanston, Illinois, USA



I have an interesting problem and would like to know
if I solve it using explorer.

I have a groundwater model I use to generate contaminate
plumes and vector fields which I view with iso-surfaces,
etc.  What I would like to do is "paste" an image of the
site on the surface of the boundbox.

I haven't even tried to do this yet,  has anyone tried
this? or is it even possible with the existing explorer
modules?

Lacking the ability to paste on picture on my boundbox, is
it possible to paste a Autocad DXF file on one of the boundaries?

Again I haven't tried this yet.  I do have a MOVIESTAR.BYU which
has a translator from DXF to MOVIE.BYU format which I suppose
I could read in with the ReadBYU module.  Would this work?  How 
would I get it on the face of the box.  The coordinate systems for
the model and the site plan do not match.  (I know I could write
a program that would translate one to the other :-(  but prefer
the easy way if possible )  Is there a way to interactively line 
one set of data up with the other?

Back to the picture question.  If I can get the picture pasted on
one side of the bounding box, is there a way to make it 
semi-transparent?

Thanks for any help.
Newsgroups: comp.graphics.explorer
From: robert@texas.asd.sgi.com (Robert Skinner)
Subject: Re: LatToGeom core dumps
Reply-To: robert@sgi.com
Organization: Silicon Graphics Inc., Advanced Systems Division
Distribution: global
Date: Fri, 4 Sep 1992 00:29:36 GMT

In article <dieter.715519092@sun-3>, dieter@sun-3.cs.uct.ac.za (Dieter Polzin) writes:
|> I have recently started using explorer. I wrote a module to read data from a
|> file into a 2D uniform lattice. This lattice and another of the same size
|> are fed into DisplaceLat which is then fed into LatToGeom. On the first run
|> everything works fine. But if I then go change the scale in DisplaceLat or
|> change something in LatToGeom, the latter usually core dumps. I must say that
|> I am using a big lattice (dims[0] = dims[1] = 300) but the strange thing is
|> that it used to work a few weeks back. We have, however, installed IRIX 4.0.2
|> in the meantime, could that be the problem?
|> I am aware that the problem could be with my module, but after its fired the
|> first time I usually don't use it again. If I fire LatToGeom more than once
|> though, it is likely to core dump.

All manner of weird and wonderful things are possible with shared memory.

I tried the same thing with GenLat as a source, and didn't have any
problem.  Set up GenLat to the primitive type and numDataVars that
simulate your module, and if it works for you, then it must be your
module.

-- 

Robert Skinner
robert@sgi.com

	"The sendmail configuration file is one of those files that
	looks like someone beat their head on the keyboard. After
	working with it... I can see why!"

				-- Harry Skelton (harry@usrgrp)
Newsgroups: comp.graphics.explorer
From: rlb@lavalite.asd.sgi.com (Robert Brown)
Subject: Explorer 2.0 Beta site solicitation
Organization: sgi
Date: Wed, 26 Aug 1992 00:34:59 GMT

The Explorer development group is looking for test sites for the beta version of
release 2.0.  Many of the features of this release were unofficially announced at
Siggraph in Chicago this year.  We are looking for "shakedown" sites to pretest the
new software.  The precise feature set will be announced soon, and the release
schedule announced around the same time.  We are expecting that the beta release
will be rock-solid, and are looking for people to verify that conclusion.

If you are interested in a jump on the release, please respond to this posting.
There are both benefits and obligations associated with being a test site, in
balance.  Release 2 has a very powerful data-typing scheme, and highly useful
application creation support, among many other features.  A new Module Writer's
Guide will be included as well.

If you want early access to this software, and are willing to work under beta
software rules, please get back to me.

Bob Brown
---------------
Robert L. Brown
Manager, IRIS Explorer
Silicon Graphics, Inc.
From: gary@enigma.asd.sgi.com (Explorer Conscience)
Newsgroups: comp.graphics.explorer
Subject: Re: Particle Tracking Module?
Date: 3 Sep 92 15:52:12 GMT
Reply-To: gary@sgi.com
Organization: Silicon Graphics Computer Systems, Mountain View, CA

In article <42987@skye.dcs.ed.ac.uk>, simultec!gr@net.uu.uunet (Gabriel Raggio) writes:
|> From: simultec!gr@net.uu.uunet (Gabriel Raggio)
|> Subject: Particle Tracking Module?

|> 
|> I would like to know if somebody has a
|> particle tracking or particle trace module?
|> 
|> In other words a module that will show
|> paths of neutral particles in a velocity
|> field (2D or 3D)

The module 'Streakline' is available on the ftp sites. It performs a
streakline calculation on a static 3D flow field. 

The ftp sites are :

129.215.56.29           ftp.epcc.ed.ac.uk
139.88.54.33            swedishchef.lerc.nasa.gov
-- 

Gary Griffin			I just hope I'm still dreamin'
gary@sgi.com			'cause if this is for real
				I'm gonna get very depressed
Think WORLDWIDE		
						Howard T Duck
From: rlb@lavalite.asd.sgi.com (Robert Brown)
Newsgroups: comp.graphics.explorer
Subject: Re: Changing option menu selection from SW?
Date: 28 Aug 92 16:19:59 GMT
Organization: sgi

In article <1992Aug26.093955@betsy.gsfc.nasa.gov>, hagedorn@betsy.gsfc.nasa.gov (John Hagedorn) writes:
|> 
|> I notice when I use the GenLat module that when I select
|> one of the curvilinear choices from the "Coord Type" 
|> menu that the "Coord Representation" option menu changes
|> itself to curvilinear.  I haven't been able to find a 
|> call for changing the current selection in an option 
|> menu.  How is this done?

The routine GenLat uses is cxInWdgtLongSet.  The line of code, specifically
from GenLat.c, is

        cxInWdgtLongSet("Coord Representation", CoordTypeNeeded);

Where CoordTypeNeeded is a long.
---------------
Robert L. Brown
Silicon Graphics, Inc.
From: williams@casbah.acns.nwu.edu (Gus Williams)
Newsgroups: comp.graphics.explorer
Subject: Volume rendering on a 4D35
Date: 27 Aug 92 21:00:47 GMT
Organization: Northwestern University, Evanston, Illinois, USA


I can't seem to get volume rendering to work correctly.  I've
played with the splat sizes, adjusted the colormaps, prayed
to the computer gods, but nothing works.  I've decided that
I just don't have the hardware for it (low computer self image).

The problem is I get solid splats.  I can't seem to make them
semi-opaque (sp?).


I have a 4D35/TG and hinv gives me 

Graphics board: GR1.2 Bit-plane, Z-buffer, Turbo options installed

Do I need something else? or am I just an underachiever?


Thanks for any help, or any recomendation of a good therapist that
specilizes in computer caused mental disorders.
Newsgroups: comp.graphics.explorer
From: hagedorn@betsy.gsfc.nasa.gov (John Hagedorn)
Subject: Changing option menu selection from SW?
Reply-To: hagedorn@betsy.gsfc.nasa.gov (John Hagedorn)
Organization: NASA/GSFC
Date: Wed, 26 Aug 1992 13:39:55 GMT


I notice when I use the GenLat module that when I select
one of the curvilinear choices from the "Coord Type" 
menu that the "Coord Representation" option menu changes
itself to curvilinear.  I haven't been able to find a 
call for changing the current selection in an option 
menu.  How is this done?

Thanks.

John Hagedorn   NASA/GSFC   hagedorn@betsy.gsfc.nasa.gov
Newsgroups: comp.graphics.explorer
From: tds@world.std.com (Textron TDS)
Newsgroups: comp.graphics.explorer
Subject: Problem relaunching map that employed P-Func editor
Date: 1 Sep 92 20:51:56 GMT
Organization: The World Public Access UNIX, Brookline, MA
	
	I am new, enthusiastic explorer user with one small problem.  When

creating a parameter function relationship using the P-Function Editor, all
of my variables get assigned to the same alias after relaunching the map.
All of the aliases seem to have been saved in the map file.
	Is there a known fix for this?
Newsgroups: comp.graphics.explorer
From: dieter@sun-3.cs.uct.ac.za (Dieter Polzin)
Subject: LatToGeom core dumps
Organization: Computer Science Department, University of Cape Town
Distribution: global
Date: Thu, 3 Sep 1992 11:18:12 GMT

I have recently started using explorer. I wrote a module to read data from a
file into a 2D uniform lattice. This lattice and another of the same size
are fed into DisplaceLat which is then fed into LatToGeom. On the first run
everything works fine. But if I then go change the scale in DisplaceLat or
change something in LatToGeom, the latter usually core dumps. I must say that
I am using a big lattice (dims[0] = dims[1] = 300) but the strange thing is
that it used to work a few weeks back. We have, however, installed IRIX 4.0.2
in the meantime, could that be the problem?
I am aware that the problem could be with my module, but after its fired the
first time I usually don't use it again. If I fire LatToGeom more than once
though, it is likely to core dump.

If anybody has any ideas, I would appreciate hearing them.
Thanks
Dieter
Newsgroups: comp.graphics.explorer
From: hashimoto@sgi.com (Roy Hashimoto)
Subject: Re: Volume rendering on a 4D35
Organization: Silicon Graphics, Inc.
Date: Fri, 28 Aug 1992 04:45:22 GMT

In article <1992Aug27.210047.29058@news.acns.nwu.edu> williams@casbah.acns.nwu.edu (Gus Williams) writes:
>I can't seem to get volume rendering to work correctly.  I've
>played with the splat sizes, adjusted the colormaps, prayed
>to the computer gods, but nothing works.  I've decided that
>I just don't have the hardware for it (low computer self image).

You're right.  Rendering the transparent splats requires blending
capability.  For linear or gaussian splats, you also need hardware
that supports interpolating alpha across polygons.  I believe your
PI is not capable of either of these functions.

Roy Hashimoto
hashimoto@sgi.com
From: gjm@gserv1.dl.ac.uk (g.j.milne)
Newsgroups: comp.graphics.explorer
Subject: contour/render crash
Date: 3 Sep 92 13:17:10 GMT
Reply-To: gjm@gserv1.dl.ac.uk
Organization: Daresbury Laboratory, UK

I've set up a simple network with ReadLat, GenerateColormap, Contour
and Render and used the example data in
/usr/explorer/data/lattice/testVol.lat. After a couple of modifications
to the Contour panel everything seems to hang (ie no more redraws). The
machine appears to lock up, but remote access shows that Render is
hogging the CPU. Eventually, Contour dies (segmentation violation) and
disappears from the Map editor.

Has anyone got any ideas? (I have seen this problem on two machines).
---
S.E.R.C. Daresbury Laboratory, Warrington, WA4 4AD, United Kingdom.
e-mail     : g.j.milne@dl.ac.uk (INTERNET)  g.j.milne@uk.ac.daresbury (JANET)
Opinions expressed are my own, not necessarily those of my employer!
From: colovas@ohstpy.mps.ohio-state.edu
Newsgroups: comp.graphics.explorer
Subject: Fourier filters 2
Date: 1 Sep 92 10:38:32 EDT

Hello,
 This is a followup to the question of filters for fourier transforms. Barring
the existence of simple filter modules for explorer ( low pas, etc), is there a
way to set the existing filters, gaussian or exponential, to be a low pass or
high pass filter?  Any help on this subject would br greatly appreciated.
x 
________________________________________________
___________________________________________
___________________________________

Peter W. Colovas
Department of Physics
Ohio State University
colovas@ohstpy.mps.ohio-state.edu
From: crawfis@ramius.ocf.llnl.gov (Roger Crawfis)
Newsgroups: comp.graphics.explorer
Subject: Re: contour/render crash
Date: 3 Sep 92 23:10:53 GMT
Reply-To: crawfis@ramius.ocf.llnl.gov (Roger Crawfis)
Organization: Lawrence Livermore National Laboratory

I can not answer your specific question, but I too have noticed
hand-ups, core dumps, obtuce messages, etc. I seems that one
needs to know a lot of system stuff to run Explorer effectively.
Which is to be expected for the power and flexibility it offers.
So here are some observations. Let's have people add their own and
maybe we can start a FAQ.

Check these things when things go haywire:
   df  - check to see that your not running out of Arena or swap space
   tail -40 /usr/adm/SYSLOG  - this keeps a log of system errors

If your getting messages such as "Can not connect to named pipe", or
a slew of others. Go to another window and pwd, ls, df, etc might
give you a message such as too many open files. You need to rebuild
the kernel with better system variables - see /usr/explorer/unsupported/
Installation. Worse yet, anytime you install something?, the operating
system, you need to redo this.

Finally, I have noticed that explorer just won't work when you set
up the arena in a NFS mounted file system. I had it set to my scratch
disk which was fine, until I logged onto our 320/VGX which is cross-
mounted and uses the same ~/.explorerc file. They may actual document
this, but this is a reminder.

Let's see, any others?

Roger Crawfis
Lawrence Livermore National Laboratory
(crawfis@llnl.gov)
From: simultec!gr@net.uu.uunet (Gabriel Raggio)
Newsgroups: comp.graphics.explorer
Subject: Particle Tracking Module?
Date: 2 Sep 92 02:47:47 GMT



I would like to know if somebody has a
particle tracking or particle trace module?

In other words a module that will show
paths of neutral particles in a velocity
field (2D or 3D)

Thank you,
Gabriel Raggio
Lincoln, Massachusetts, USA
gr@simultec.com
   or
simultec@uunet.UU.NET
From: crawfis@ramius.ocf.llnl.gov (Roger Crawfis)
Newsgroups: comp.graphics.explorer
Subject: Re: contour/render crash
Date: 3 Sep 92 23:06:12 GMT
To: gjm@gserv1.dl.ac.uk
Cc: crawfis

Shoot. I always mess that up.
I meant to post that, not reply. Oh well, sorry about that. I
will post it to the net now.

Roger

Newsgroups: comp.graphics
From: dennis@daneel.rdt.monash.edu.au (Dennis Medina (hons))
Subject: looking for world bank
Keywords: cartography, world bank
Organization: Monash University, Melb., Australia.
Date: Thu, 3 Sep 1992 09:32:49 GMT

Hi,

I am currently looking into 'computer assisted cartography' and I have
heard of a data base called 'world bank'.  Can anyone tell me where I
can get hold of it (If it is at all possible), and can anyone tell me
what exactly it contains and how to make use of it.

Any form of assistance will be greatly appreciated.  Thanks

Newsgroups: comp.graphics
From: hafey@capitol.com (Rob Hafey)
Subject: Convert 24 bit to 8 bit ??
Organization: Capitol Disc Interactive
Date: Thu, 3 Sep 1992 11:30:51 GMT

I am looking for a few good algorithms for converting 24 bit color into 8 bit 
color.  I'm not looking for utilities to do the conversion but the actual
algorithms.  If anyone can part with some code or direct me to some text I
would appreciate it.  Please EMAIL.

Thanks in advance,

Rob

-- 
 Rob Hafey
 Capitol Disc Interactive (CD-I) 
 2121 Wisconsin Ave NW, Washington D.C. 20007   (202)625-0141 
 hafey@capitol.com
Newsgroups: comp.graphics
From: astoker@nyx.cs.du.edu (Andrew Stoker)
Subject: Format for storing map data
Keywords: maps formats
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Thu, 3 Sep 92 15:37:47 GMT


Not sure if this is the right group, but it's the best I could think of.

Is there a widely used/accepted file format for storing data on maps?  At the
moment, I'm mostly interested in storing height information.  I've a homemade
3D viewer, and I "converted" a map for this by simply reading heights at grid
intersections, from one particular map, this has given me 231 xyz-tuples.

What I'd also be interested in is a viewer for such data files (for PC or
else for X Windows), and also some sample data files (or an anon ftp site 
where they can be found).

	Andy
--
Andrew J. Stoker | "But my lord, I cannot ride a horse!"
Leicester Uni.   | "Capitol, we shall give you a horse that cannot be ridden!"
ajs6@leicester.ac.uk   |		      ``Wyrd Sisters'', Terry Pratchett
Newsgroups: comp.graphics