HDTenEightyP/NetNews huggingface dataset:
From: atems@igor.physics.wayne.edu (Dale Atems)
Subject: Re: Turning Indigo monitor off when unused
Organization: Wayne State University, Detroit, MI
Date: Tue, 17 Nov 1992 20:44:25 GMT

In article <TODD.92Nov17073810@todd.kastle.com> todd@kastle.com writes:
>In article <1992Nov16.203357.16203@cs.wayne.edu> atems@igor.physics.wayne.edu (Dale Atems) writes:
>>   The Mitusbishi monitor that came with our new R4K Indigo needs such a
>>   high brightness level to be readable that the glow is noticeable even
>>   when the screen is blanked, which can't be a good thing in the long
>>   term. Rather than twiddle with the brightness control (slow) every
>>   night and morning, I was wondering, is it safe to simply leave the
>>   monitor powered off when not in use?
>>
>Damn.  This is a tricky one.  Which model Mitsubishi monitor is it?  Some
>of them have rather intricate power-down sequences.  I once had one that
>had to be spun 360 degrees on its horizontal axis while chanting "I love my
>monitor, I love my monitor."  I traded that one in for a less demanding
>monitor that, although I couldn't turn it off, I could easily attach an UPS
>power supply to.  Apparently, OSHA has issued a warning against this
>particular model, stating that it has a tendency to explode after being
>left off for long periods of time.  That wouldn't be so bad, except it
>first sacrafices all family pets on its way out.

Wow, where can I get one? You see, I've been trying to persuade my
office-mate to move downstairs...

>
>I guess the bottom line is, read your manual!  You never know!  Hopefully,
>you won't have to do the rotation deal--it can be a strain on the limbs
>with some of these 60lb monitors, causing you to require physical therapy
>two or three times a week (depending on how often you DON'T spend time at
>your Indigo and need to turn the monitor off).
>
>Are you a student?  I hear discounts can be found for students at many of
>the chiropractic institutes...
>

Hmm. Wish I'd known that after setting up the Sony monitor that came
with my (student discounted :-)) R3k Indigo.

>
>P.S.  I hear that some of the new-fangled models come with a contrast
>knob...
>

"Knob"? Someone better tell Mitsubishi about those. These microswitch
controls, you hold 'em in, and about the time your finger goes into
rigor mortis, you hit the right setting.

>
>(Before I get flamed, insert about a hundred smiley faces.  Okay?)
>

Smileys inserted. However, a serious answer from someone would be
appreciated, as I doubt if my boss intends to buy support on this
system. <sigh>

------
Dale Atems
Wayne State University, Detroit, MI
Department of Physics and Astronomy
atems@igor.physics.wayne.edu
Newsgroups: comp.graphics
From: ccetky@nuscc.nus.sg (Tung Kwong Yeong)
Subject: Truevision Barvado MM card
Organization: National University of Singapore
X-Newsreader: Tin 1.1 PL4
Date: Mon, 16 Nov 1992 10:23:54 GMT

I acquired a Truevision Bravado card and the following are some problems
that I encounter:

1. I have problems running applications (eg windows 3.1, animator pro,
   etc) in 800x600 resolution mode.  The manual says that the horiz.
   scan rate = 38KHz and the vert. scan rate = 60 Hz for the card.
   However, my monitor manual says it only goes up to 35 Khz and 56 Hz
   respectively.  Is the difference in frequency that is causing the
   problems?  Are there other ways of overcoming it other than to change
   the monitor?

2. Images grabbed from the video window is stored either as a 24-bit or
   16-bit true-color targa file.  When I displayed it in 640x480 256
   colors, the images looks terrible.  The vendor claims that it is due
   to the low resolution of my display.  Is it true?  Are there any
   converter programs that can convert 32,000 colors images to 256 color
   images?

Any help to the above problems would be greatly appreciated.

Regards,

Tung, Kwong Yeong
Analyst Programmer
National University of Singapore
Computer Centre
Internet: ccetky@nuscc.nus.sg
Fax: (65) 778-0198
Tel: (65) 772-6423
Newsgroups: comp.graphics
From: dedmunds@selkirk.sfu.ca (Darran Edmundson)
Subject: volume visualization on a PC?
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Thu, 19 Nov 1992 19:00:27 GMT

Does anyone know of volume visualization packages that will run on a PC
under DOS?  My data set are scalar values on a 128x128x256 mesh.  I would
like to render this as either equipotential surfaces or using opaqueness to
see inside my box.

I'm doing collision simulations with 3d optical solitons (light bullets)
and I'd like at least one figure for an upcoming paper that really looks
three-dimensional (so far I've been plotting 2d slices through the middle
of my box).  I've got a relatively powerful 486 with 16Mb of RAM and lots
of hard disk space.  There are lots of such packages for unix and the mac
but I've yet to see anything for the PC.

Any ideas?
 
-- 

Darran Edmundson
darran@chaos.phys.sfu.ca

Xref: sparky comp.graphics:12014 ba.seminars:711
From: jeg@Apple.COM (Julian Gomez)
Newsgroups: comp.graphics,ba.seminars
Subject: Bay Area SIGGRAPH final meeting 11/24
Date: 18 Nov 92 07:12:28 GMT
Followup-To: poster
Organization: Apple Computer Inc., Cupertino, CA


Skeletal Design of Natural Forms

Jules Bloomenthal
Xerox PARC

Tuesday, November 24, 1992
8PM
Xerox PARC Auditorium
Palo Alto


We examine the notion that complex, natural appearing shapes are most
easily defined via their inner structure (`skeleton').  We will review
the implicit methods developed at PARC for `fleshing' the skeleton into
a smooth, macroscopic surface; these include various implicit blending
and surface tiling techniques.

An interesting variation on these methods involves the `exo-skeleton',
in which the parametrically defined skeleton extends beyond the
implicitly defined surface.

We will also consider surface detail, its relation with the skeleton,
and the need for and implementation aspects of multi-resolution surface
representation.

The software environment for this work will be outlined, and the talk
will include some thoughts concerning the importance and significance
of shape design.


Bay Area ACM/SIGGRAPH meetings have always been open to the public, no
admission charge.


This is the last meeting of Bay Area ACM/SIGGRAPH. Since there are no
candidates for president, no election can be held, and without
officers, no meetings can be held. Likewise there will be no more
issues of Chroma. For further information on the no longer future of
Bay Area ACM/SIGGRAPH, contact Lou Katz or Julian Gomez.
From: lilleyc@cs.man.ac.uk (Chris Lilley)
Newsgroups: comp.graphics
Subject: Re: CIE chromaticity diagram
Date: 17 Nov 92 04:38:08 GMT
Organization: Dept Computer Science, University of Manchester, U.K.

In article <1992Nov14.174740.25347@watson.ibm.com>
gaitat@gaitat.kgn.ibm.com (Saki) writes:

>I am trying to generate the CIE chromaticity diagram. 

In what way 'generate' it? Perhaps you could be more specific.

>In all the
>books that I have looked they offer RGB <-> CIE conversion
>matrices but they never say what are the max values for X, Y, Z.

There arent any. The colours just get brighter as you move from the
origin. Remember these are measured light intensities. The sun for
example, measured close to the surface, would be _very_ bright and
have _very_ large X Y and Z values.

In other words, CIE XYZ is an open cone with the apex at the origin,
but unbounded at the other end.

In general, relative values are sufficient. What is done is to take
whatever is being treated as white, and give that a fixed, arbitrary Y
value - 1,o, say, or 100 (%). Other colours are then given relative to
this white.
 
>Given the triple (x,y,Y) = (0.628,0.346,67.2) you get 
>(r,g,b) = (255,0,0).  

No, wrong. You may get that with your particular monitor, but other
monitors will give different values. In other words, their R
correcponds to a different colour. Or another way to look at it, other
monitors use different (rgb) values to generate the same colour as is
generated by (255,0,0) on yours.

It is a mistake to try and equate RGB and CIE colours. CIE can express
any colour that can be seen, regardless of the hardware that is used
to produce it. RGB is a device dependent way of expressing the limited
range of colours that a monitor can display.

>My question is what is the reange for Y
>and what happens lets say if I specify Y = 100.  What color,
>if any, do I get?

I think you will now see why you don't need an answer to this question
anymore.

--
Chris Lilley
---------------------------------------------------------------------------
Technical Author, ITTI Computer Graphics and Visualisation Training Project
Computer Graphics Unit, Manchester Computing Centre, Manchester, UK
Internet:   lilley@cgu.mcc.ac.uk        Janet:   lilley@uk.ac.mcc.cgu
Voice:      +44 (0)61 275 6095          Fax:     +44 (0)61 275 6040
---------------------------------------------------------------------------
From: lilleyc@cs.man.ac.uk (Chris Lilley)
Newsgroups: comp.graphics
Subject: Re: What is this Grayscaling Formula called ??
Date: 19 Nov 92 14:05:05 GMT
Organization: Dept Computer Science, University of Manchester, U.K.

In article <1992Nov18.180859.25901@netcom.com> kudzu@netcom.com (Michael Sierchio) writes:

>In article <6760@m1.cs.man.ac.uk> lilleyc@cs.man.ac.uk (Chris Lilley) writes:

>>Remember you must first gamma correct the RGB values so the light
>>levels are linear. Then try working around the following values

>Bzzzt.  You mean so that the log luminance is linear (or near linear).

No, I mean so that the light levels - the luminance - is linear. Not
log linear. Linear linear. Bzzzt yourself ;-)

The transfer function from input voltage to output luminance of a
monitor can be roughly modelled by a power law. The exponent of this
law is called gamma. So a correction function is applied using the
inverse of the gamma value, producing a luminance which is linear. In
other words, producing the values that the input signal would have
produced if the transfer function were linear.


>>Technical Author, ITTI Computer Graphics and Visualisation Training Project
>
>You could use some of that training yourself...

I will let you figure out who needs the training most: the person that
wrote the training materials, or the person he is patiently explaining
basic concepts to  ;-) 


--
Chris Lilley
---------------------------------------------------------------------------
Technical Author, ITTI Computer Graphics and Visualisation Training Project
Computer Graphics Unit, Manchester Computing Centre, Manchester, UK
Internet:   lilley@cgu.mcc.ac.uk        Janet:   lilley@uk.ac.mcc.cgu
Voice:      +44 (0)61 275 6095          Fax:     +44 (0)61 275 6040
---------------------------------------------------------------------------
Newsgroups: comp.graphics
From: mjs7529@tamsun.tamu.edu (Michael J Stumpf)
Subject: UNREAL-like effects
Organization: Texas A&M University, College Station
Date: Mon, 16 Nov 1992 00:36:34 GMT

Please respond by mail:

Can anyone point me to some techniques to do marquees smoothly, as well as
effects seen in the demo "unreal" for MSDOS?

thanks

-- 

First things first, but not necessarily in that order.            -Doctor Who


Newsgroups: comp.graphics
From: beckerd@juliet.ecs.csus.edu (David Becker)
Subject: Looking for AutoCad *.DXF Files
Followup-To: beckerd@athena.ecs.csus.edu 
Summary: See subject  
Keywords: Cars, Engines, Computer Equiptment 
Organization: California State University, Sacramento
Date: Fri, 20 Nov 1992 03:49:49 GMT


Greetings all!
  
   I am looking for AutoCad *.DXF files of cars (preferably sports
cars), car engines (any kind), and computer equiptment for a project
I am working on.  If anyone out there knows where I can find such
things, please let me know.  Or better yet, if any of you HAVE such
things and would care to UUENCODE them to me in a message, that would
be great.  I need these as quickly as possible.  If this is not the
right
place for this message, I appologize, and kindly point me in the right
direction.  Also, please respond by E-MAIL ONLY as I don't normally
subscribe to this newsgroup.  Thanks in advance!

_DAVE_BECKER_


Xref: sparky comp.graphics:11994 comp.multimedia:3405
From: kkaempf@didymus.rmi.de (Klaus Kaempf)
Newsgroups: comp.graphics,comp.multimedia
Subject: What is Digital Video Interactive (DVI) exactly ??
Summary: Where is Digital Video Interactive defined ?
Keywords: Digital Video Interactive
Date: 17 Nov 92 13:37:17 GMT
Organization: Klaus Kaempf Softwareentwicklung


Hi there !

Looking trough all the FAQ's and other material didn't help me,
so i'm asking the net:

What exactly is the definition for 'Digital Video Interactive' (DVI) ?

Please DON'T send me huge amount of mail, just a few sentences or the
adress of a ftp-server is sufficient !

Thanks,

Klaus

-- 
Klaus Kaempf                 E-Mail: kkaempf@didymus.rmi.de
Jakobstr. 181                Fax:    0241-403407
D-5100 Aachen                Voice:  0241-403446
Newsgroups: comp.graphics,comp.lang.c
From: rdippold@qualcom.qualcomm.com (Ron Dippold)
Subject: Re: Please Help Me Keep My Job!
Organization: Qualcomm, Inc., San Diego, CA
Date: Fri, 20 Nov 1992 00:41:33 GMT

ted@oz.plymouth.edu (Ted Wisniewski) writes:
>In article <1992Nov19.173301.3870@kpc.com> hollasch@kpc.com (Steve Hollasch) writes:
>>    My manager has asked me to finish several projects by the end of this
>>year, and they're really hard!  I told her I could do them, but now I don't
>>know; they're pretty tricky.  I'm sure other people have done stuff like
>>this, so why should I reinvent the wheel?  Why not use the resources of the
>>net?

>more than happy to take it.  This is sort of like asking someone else to
>do you homework for you.  Isn't that like 'plagiarism'?  Sounds to me
 ^^^^^^^^^^^^^^^^^^^^^^^

Yep.  If you picked this up on comp.graphics instead of comp.lang.c,
you missed the following gem:


|From: 2644danticoj@vms.csd.mu.edu
|My name is Cetera and I am new to this network. I am anxiously awaiting
|graduating Marquette this December, but there is an obstacle in my way. I must
|first pass this math class in which I must program in C. I don't know this
|language, and now must write several programs before the end of the year. The
|course teaches data structures, which I have no problems understanding.
|However, all homework is programmed in C and because of an adminstrative
|loop-hole, I was enrolled in the class with no knowledge of the needed
|programming language. So, can you help me write these programs, thereby
|allowing me to graduate and go on to serve my country as an officer on a
|nuclear submarine? Please???? My future depends on it. By the way, I will be
|using a UNIX machine with a STUDSYS compiler. Help!!!!!!!!!!!!!!!!!!!!!
| [his homework list which he wants us to do for him]

I don't see the problem with picking up "Rookie Programming" or other
good introductory programming books and learning the basics of C.  On
the other hand, hey, what could go wrong on a nuclear sub?
-- 
I do the work of three men - Larry, Moe, and Curly.
Newsgroups: comp.graphics,comp.graphics.animation,alt.3d,alt.graphics
From: ph14@cunixb.cc.columbia.edu (Pei Hsieh)
Subject: Info Wanted: Alias, Softimage, Pixar, et al.
Organization: Columbia University
Date: Wed, 18 Nov 1992 00:24:52 GMT

Can anyone tell me the addresses and telephone numbers of the above-named
companies?  I read somewhere that they offer their software to educational 
institutions for free (or close to it) if you have the hardware and if you
are offering a class that would use it.  Anyone know anything more specific
than that or who or what division to contact for more information?

I also heard that the newest version of Unix that runs on NeXT machines
comes equipped with Renderman.  Is this true?!

Any and all replies will be _greatly_ appreciated! {8+)

Thanks in advance.

Pei     (ph14@cunixb.cc.columbia.edu)
From: aron@archangel.ced.berkeley.edu (aron bonar)
Newsgroups: comp.graphics
Subject: POV in Silicon Graphics workstations
Date: 18 Nov 92 23:23:39 GMT
Organization: University of California, Berkeley
NNTP-Posting-Host: archangel.ced.berkeley.edu

I was wondering if anyone out here has compiled POV for a SGI.
I was thinking about trying it. 

If anyone has please post about your experiences...was it a pain to compile...etc..etc

Thanx

Aron
Newsgroups: comp.graphics
From: jh507@rollgeosc.psu.edu (John Hammer for GEOSC 507)
Subject: Graphics Formats
Keywords: SunRaster GIF binary
Organization: Penn State Geosciences
Date: Mon, 23 Nov 1992 23:11:38 GMT

Hi,

I have some binary data (~100Mb) that I would like to put into
some standard graphics format so that I can annotate and print
some of the images.  I have a program that a former professor
here wrote that will make PostScript out of them, but I'm not
happy with the results upon translation.  The PostScript looks
great printed, so I have been making "overlays" and merging
PostScript files. (Well, I just take out the showpage.)

If anyone could help with a good reference on SunRaster or GIF
format, I would be greatly indebted!  If there is another,
simpler option, I'd love to hear that, too!

I will be making a movie with the data in the not to distant
future.  I'd be thankful for personal opinions on the best way
to go about this.  I am using a UNIX based SUN system, and am
currently planning to use a TAAC board for the project.  I have
access to PV-Wave.  Should I learn this for my project?  I also
have access to a Silicon Graphics machine on the network.  I 
don't know what software we have for it, but I could check if 
that would be my best bet.

Thanks in advance,

John Hammer
EMAIL: hammer@geosc.psu.edu
Penn State Seismology
Grad Student
From: skp@skp.asd.sgi.com (Scott Pritchett)
Newsgroups: comp.graphics.animation
Subject: Re: Stupid Question: What Resolution Do I Render At?
Date: 23 Nov 92 22:32:03 GMT
Reply-To: skp@skp.asd.sgi.com (Scott Pritchett)
Organization: Silicon Graphics Inc., Mountain View, CA
NNTP-Posting-Host: skp.asd.sgi.com


Back by popular demand...

> Is there a standard resolution to render at when doing work for video?  If
> so... what is it?  And, if not... on what does it depend ?

The following video formats are in common use:

STD TV:
NTSC	Composite analog format with 525 total lines, and 485 active
59.94Hz	lines.  Since this format contains half-line definitions, one
	normally renders 486 full-sized lines.  The horizontal resolution
	depends on your video system.  Since this format has a 4/3 aspect
	ratio, you would expect to render 4/3*486 = 648 pixels in a
	square-pixel format.  The CCIR601 digital standard uses 720x486
	non-square pixels (still 4/3 aspect ratio).  If you wanted to use
	4Fsc digital (D2) you would have yet-another resolution.

PAL	Composite analog format with 625 total lines, and 575 active
50Hz	lines.  Since this format contains half-line definitions, one
	normally renders 576 full-sized lines.  The horizontal resolution
	depends on your video system.  Since this format has a 4/3 aspect
	ratio, you would expect to render 4/3*576 = 768 pixels in a
	square-pixel format.  The CCIR601 digital standard used 720x576
	non-square pixels (still 4/3 aspect ratio)


HDTV:
SMPTE	There is really only one digital resolution used here.
240M	1920 pixels by 1035 lines at 16/9 aspect ratio.
60Hz	This is a non-square pixel format.

Eureka	Once again, only one digital resolution is used.
1250	1920 pixels by 1152 lines at 16/9 aspect ratio.
50Hz	This is a non-square pixel format.


When producing material for video, you should be aware of the "TV Safe"
area which is inset 5% from the edges of active video.  You should not
have any important data outside this region of the picture.

Additionally, the "Safe Title" area is inset 10% from the edges.  You
should not have any text etc. that you want the viewer to see outside
this region.


---------------------------------------------------
Scott Pritchett                    Silicon Graphics
Video Software Manager	 Advanced Graphics Division
skp@sgi.com                            415-390-3080
___________________________________________________




---------------------------------------------------
Scott Pritchett                    Silicon Graphics
skp@sgi.com                            415-390-3080
___________________________________________________
Newsgroups: comp.graphics.animation
From: yuaw@undergrad.math.waterloo.edu (Aw Yang Uei)
Subject: **Animation -- Games**
Organization: University of Waterloo
Date: Mon, 23 Nov 1992 14:45:24 GMT

Hi,

  I am wondering anyone here know any package that has 'Good' build in
function for creating games?

  Or anyone here is a game programmer? (I would like to learn something
from you :-)

  And the following may sound 'too easy' for you, but :
    Is that true we can use a scanner to scan in a picture and display it
or 'animate' it on the screen just like what they did for all the games?



  Thanks very much for answering my question.




  Uei.
    
Newsgroups: comp.graphics.animation
From: zap@lysator.liu.se (H}kan Andersson)
Subject: New Xflick available: All sizes and Colors!
Summary: Zap did it again
Keywords: fli xflick
Organization: Lysator Academic Computer Society, Linkoping University, Sweden
Date: Mon, 16 Nov 1992 15:00:31 GMT

In phoenix.oulu.fi, in /incoming you will find zaps_xflick.tar.Z that
is a FLI viewer for X windows.

It will view any resolution FLI animations (animations are available
at phoenix.oulu.fi /RayTracker_demos directory and at other places)
and use the public colormap, i.e. no need to click the window as in
older versions of Xflick.

I'm no X guru, nor am I a UNIX wizard, so take it for what it is :-)

Enjoy the hack, and keep 'em comments comming :-)


-- 
!! The ANSWER   : 42     ("Hitchhikers Guide to the Galaxy" - Douglas Adams) 
!! The QUESTION : 0x2b | ~0x2b   ("Hamlet" - William Shakespear) | Dont Worry -
!! The EMAIL    : zap@lysator.liu.se  The PHONE: +46 16 96460    | Mail Zappie!

--
!! The ANSWER   : 42     ("Hitchhikers Guide to the Galaxy" - Douglas Adams) 
!! The QUESTION : 0x2b | ~0x2b   ("Hamlet" - William Shakespear) | Dont Worry -
!! The EMAIL    : zap@lysator.liu.se  The PHONE: +46 16 96460    | Mail Zappie!
From: gt3021b@prism.gatech.EDU (Eric Zundel Ayers)
Newsgroups: comp.graphics.animation
Subject: Re: 3D Studio - Books?
Keywords: 3DS 3D Studio
Date: 17 Nov 92 19:39:21 GMT
Organization: Georgia Institute of Technology

In article <17NOV199208011536@reg.triumf.ca> wilmshurst@reg.triumf.ca (WILMSHURST, PETER) writes:
> 	I'm pleased with the program (3DS 2.0), however I too am having problems
>  generating mirrored surfaces. I've even used the same material CUB100 
>  (as found in CUBEDEMO.3DS materials library) and I get no mirror effect.
>  WHY... WHY... WHY...  Unfortunately, I don't get enough time on my friends
>  machine (486-25) to try many combinations= of materials/properties/etc.
>
>				Thanks in advance... Pete
>
>  PS:  Please reply here,  I think this info may help others. =:)
>
> _________________________________
>| email: wilmshurst@reg.triumf.ca |
> ---------------------------------

I think that, in order to get a mirrored looking surface, you have to map
your own reflection into the material... So if you wanted to see a reflection
of the rest of your model in a mirrored surface, you'd have to render your
drawing from a different vantage point, then map that image into your mirrored
surface, and then render the model again from your desired viewpoint...

It takes a lot of fiddling around (with this method) to get the perspective 
and color effects you want.  

I don't know how you would deal with animation in this respect.  I guess you
would need some sort of raytracing to get an "honest" mirrored effect.  
But what is honest about animation anyway?

Eric.
-- 
                                   \\||//
Eric Zundel Ayers                  +----+
Georgia Institute of Technology    |----|         College of Architecture
gt3021b@prism.gatech.edu           +----+    Home of the House of Suicide
Xref: sparky comp.graphics.animation:1058 alt.binaries.pictures.d:5465