HDTenEightyP/NetNews huggingface dataset:
From: glover@elec.uq.oz.au (Stuart Glover)
Subject: Digital Image Warping - CODE
Summary: Code need for digital image warping
Organization: Prentice Centre, University of Queensland
Date: Thu, 10 Sep 1992 03:23:07 GMT

Hi,
   I have just read George Wolbergs book on Digital Image Warping
and am interested in implementing some of the code.   In particular
I would like to use the two pass mesh warp code on pp238 - 240,
however I can't get it to work properly.  When I pass it through
with a mesh that maps the input points directly on to the same
output points, it warps the top part of the image.  It also gives
lines down the right hand side of the image.  Also if I change the
mesh, there is no noticeable difference. Has anybody had these
problems or have I made a mistake in transcribing the code? I fixed
up some obvious bugs (well i hope they are bugs anyway) but don't 
know if there are there any more.  Has anyone actually used this
code and got it working?  If so could they email me with the corrected 
code or the corrections. Any help would be greatly appreciated.

Stuart Glover.
--

___________________________________________________________________________
Stuart Glover - glover@s1.elec.uq.oz.au 
                                        
Dept. Electrical Engineering            
University of Queensland                
BRISBANE 4072                           
Australia                               
                                        
tel: (07) 365 3864
From: debell@ERE.UMontreal.CA (De Bellefeuille Andre)
Newsgroups: comp.graphics
Subject: Re: XY - XYZ Projection in C
Summary: Request to post
Keywords: algorithm
Date: 10 Sep 92 17:08:14 GMT
Followup-To: comp.graphics
Organization: Universite de Montreal

Please post such algorithm for us beginers! 

Thanks in advance for your trouble

Andre De Bellefeuille
Newsgroups: comp.graphics
From: thinman@netcom.com (Technically Sweet)
Subject: Re: Need GIFs of wood-grain for mapping onto objects
Date: Tue, 08 Sep 92 23:08:01 GMT
Organization: International Foundation for Internal Freedom
Distribution: na

djb@geovision.gvc.com (Darren Burns) writes:

>Come to think of it, if you have ANY surface-type GIFs (marble, for
>example) it'd be great to get those.

1) Get the Graphics Gems II book from a book store
and the source code from princeton.edu.  It includes
3D surface generation (i.e. you generate a solid 
piece of wood and carve it away).

2) Collect naughty GIF off of alt.binaries.whatnot.
A lot of these things are scanned on very nice equipment
and you can snip out sand, wood, etc. from the backgrounds.

3) Buy wallpaper in the dollhouse section of a toystore.

-- 

Lance Norskog

Data is not information is not knowledge is not wisdom.
Newsgroups: comp.graphics
From: brianm@sco.com (Brian Moffet)
Subject: VideoBlaster
Organization: The Santa Cruz Operation, Inc.
Date: Thu, 10 Sep 1992 18:25:50 GMT
Keywords: Reviews


Anyone have information on this device they can send me?

thanks

brian moffet

brianm@sco.COM
--
"Face it, Chuck.  Taken as an aggregate, the human race is a stupid, sorry lot."
                           -- Jonathan Quist

brianm@sco.com  or uunet!sco!brianm                    Speaking for Myself
Newsgroups: comp.graphics,comp.graphics.visualization,comp.sys.ibm.pc.hardware
From: wwj@eos.arc.nasa.gov (Walter Johnson)
Subject: Re: Looking for polygon engine hardware
Organization: NASA Ames Research Center
Distribution: usa
Date: Mon, 7 Sep 1992 22:46:41 GMT

reuel@blivet.houst.sgi.com (Reuel Nash) writes:


>In article <1992Aug31.212434.23809@microunity.com>, jsw@microunity.com
>(Jeff Weinstein) writes:
>|> In article <1992Aug31.141110.12707@thunder.mcrcim.mcgill.edu>,
>panisset@lightning.mcrcim.mcgill.edu (Jean-Francois Panisset) writes:
>|> > In article <1992Aug30.033019.26946@mnemosyne.cs.du.edu>
>wdwells@nyx.cs.du.edu (David "Fuzzy" Wells) writes:
>|> > >Won't the IRISVision cards do this? 
>|> > 
>|> > I may be wrong, but I think the IRISVision product line (i.e. the
>equivalent
>|> > of Personal Iris graphics on a PC adapter) was dropped by SGI not
>long after
>|> > it was introduced. In my mind, such a product just does not make a lot
>|> > of sense when you look at the price of an Indigo...
>|> 
>|>   The IRISVision product has been picked up by pellucid, inc.  They are a
>|> startup founded by some ex-sgi employees.


>I happen to have a business card:

>pellucid, inc 
>3180 De La Cruz Blvd., SUite 201
>Santa Clara, CA  95054
>(408)987-0315
>fax (408)986-8378

>(I'm not associated with pellucid. I work for SGI)

While we're at this does anyone have, or know how I could get, a comparative
listing of pc-based, and hopefully modular, graphics engine type hardware.
This stuff, usually priced between $5k and $50k, exists and is often 
very powerful (e.g. boards made by XTAR of San Diego).  This market is 
moving fairly slowly now, or was when I last examined it.  These systems are
often optimized for "real-time" simulation as opposed to CAD/CAM type 
visualization requirements.  The boards for the XTAR system were spec'd at
producing about 60,000 polygons/sec (non-antialiased, no texture maps,  
but with hidden surface removal, and other interesting capabilities such as 
moving objects and levels-of-detail).  These boards are also programmable 
in micro-code for adventurous types.  The cost was, however, $20k.  Have
things gotten any cheaper and/or better?

Walt Johnson
Research Psychologist
NASA Ames Research Center         (I have never spoken for NASA before,
                                   and doubt that I ever will)

-- 
__________________________________________________________________________
Walter Johnson
_________________________________
From: rounsley@jeeves.ucsd.edu (Steve Rounsley)
Newsgroups: comp.graphics
Subject: 24 bit images
Date: 11 Sep 92 19:48:57 GMT
Organization: University of California, San Diego

Hi ,
	I have recently purchased a 24bit video card -(speedstar
24x), and was hoping to get some images that can take advantage
of this.  Does anybody have any suggestions for archives of
24bit images.  Also which viewers can handle 24 bit right now?
Any input would be appreciated....
		Steve Rounsley
Newsgroups: comp.graphics
From: sej@allspice.unx.sas.com (Samuel Johnson)
Subject: clip art of a lighthouse
   I would like to get a clip art picture of a lighthouse. I want one
Originator: sej@allspice.unx.sas.com
Date: Fri, 11 Sep 1992 18:20:32 GMT
Organization: SAS Institute Inc.


of the same style as the Cape Hatteras (sp?). I would like to be able 
to read it into a graphics package and edit it. I have access to most
packages.

Thanks,
Sam
-- 
 -----------------------------------------------------------------------------
 Samuel Johnson        SAS Institute Inc. (919) 677-8000 x6264
 Computer Graphics     SAS Campus Drive      
 sej@unx.sas.com       Cary, NC 27513      
 
 the views expressed are not necessarily the views of the author
-----------------------------------------------------------------------
Newsgroups: comp.graphics
From: oberto@genes.icgeb.trieste.it (Jacques Oberto)
Subject: The nicest Earth map of all!!!
Organization: ICGEB
Date: Tue, 8 Sep 1992 10:14:37 GMT


Dear Netters,

Thanks to Barton Meeks <bmeeks@bnr.ca> I obtained what I was looking
for: the nicest picture (actually a real photograph) of an earth map.
Barton Meeks writes:
"I have an image called "cloudless.jpg" which is a image of the earth
 with all clouds removed. It was created through computer analysis and
 combination of many images.  It size is 1113 by 525 and is about
 51000 bytes...."
The original is a bit dark, but if you brighten it (I used PICLAB on
a PC), the result is so breathtaking that I couldn't resist posting
its location:     sauna.cs.hut.fi  pub/store/jpg/Misc/cloudless.jpg
There is some concern that the image is copyrighted by Mr. Meeks'
employer.  Better contact them before commercial use...

Jacques Oberto  <oberto@genes.icgeb.trieste.it>

Newsgroups: comp.graphics,comp.os.ms-windows.misc,comp.sys.ibm.pc.hardware
From: curtis@cs.berkeley.edu (Curtis Yarvin)
Subject: Re: Addressing two independent monitors from one PC
Keywords: Dual monitors, windows
Organization: CS Dept. Snakepit - Do Not Feed.
Date: Wed, 9 Sep 1992 05:07:55 GMT

In article <1992Aug25.225953.21677@ccu1.aukuni.ac.nz> elemjm@ccu1.aukuni.ac.nz (Michael Miles) writes:
>PROBLEM TIME...
>
>I need to use two SVGA monitors from the same computer. The problem is
>rather than simply displaying identical information, I want to be able to run
>Windows 3.1 on one, and send simple patterns to the other, controlled from a
>program running under Windows. I will be using either a standard or laptop 
>386 PC with coprocessor, 4Meg RAM.
>
>Question 1. Is this possible at all - even using a separate graphics card for
>            each monitor?

Get a vanilla SVGA card and an ATI 8514/Ultra - the model
_without_ built-in VGA.  Dell sells 'em for $299 US.

There's no command overlap.  Bloody dandy.

c
From: hlr@aber.ac.uk (Hazel Marie Davey)
Newsgroups: comp.graphics
Subject: VP Graphics (File Conversion)
Date: 13 Sep 92 12:32:34 GMT
Organization: University of Wales, Aberystwyth

Does anyone know if there is a file conversion utility for
converting .VPG files from VP Graphics (NewStar Software)
into anyting that the rest of the world recognises?

I would like to be able to get these files eventually into
my Word for Windows documents, possibly via Corel Draw.

Is this Possible?

Thanks in advance,

Hazel
Xref: sparky comp.graphics:9727 comp.windows.misc:1429
From: cheeyong@kolmogoroff.iss.nus.sg (Lim Chee Yong)
Newsgroups: comp.graphics,comp.windows.ms.programmer,comp.windows.misc
Subject: Request info for TIFF class f to DIB/BMP format conversion program source
Date: 15 Sep 92 11:09:27 GMT
Organization: Institute of Systems Science, NUS, Singapore
Originator: cheeyong@kolmogoroff

I am looking for a TIFF class F to MS-WINDOWS DIB / BMP format 
conversion program with source codes. Would anyone out there
happen to have some or can tell me where I could get one?

Thanks and regards.

-- 
Lim Chee Yong				 Phone    : 65 - 772 - 3695
Institute of Systems Science  		 Fax      : 65 - 778 - 2571 
National University of Singapore         Internet : cheeyong@iss.nus.sg
Kent Ridge, Singapore 0511               Bitnet   : isslcy@nusvm.bitnet
From: earhart+@CMU.EDU (Rob Earhart)
Newsgroups: comp.graphics
Subject: Re: GIFS with xwindows?
Date: 12 Sep 92 19:20:15 GMT
Organization: Sophomore, Physics, Carnegie Mellon, Pittsburgh, PA

npearl@magnus.acs.ohio-state.edu (Nathan Y Pearlstein) writes:
> Could someone please tell me how to display gifs with xwindows on a sun?

  There's a program called "xv" that'll display gifs under x-windows on
a Sun... (there are faster utilities, but xv seems to be the most
widespread).

  -Rob
Organization: Queen's University at Kingston
Date: Saturday, 12 Sep 1992 22:16:54 EDT
From: <JIANGY@QUCDN.QueensU.CA>
Newsgroups: comp.graphics
Subject: Re: 3d line through 3d polygon

The most intuitive (not necessarily efficient) solution is:
   (1) compute the coefficient (A, B, C, D) of the polygon plane
       using Newell (?) method. See Gems I (or II or III, cann't
       remember exactly) for the code.
   (2) compute the intersection point between the infinite line
       and the plane.
   (3) test if the point is in the polygon. The code for this can be
       found in the latest Raytracing news (ftp: princeton.edu, in
       pub/Graphics/RTNews/RTNv5n3).
   (4) if the answer to (3) is yes, determine if this point lies
       between the two end points of the line segment. If yes, the
       line segment intersect the polygon and the point is what you
       are looking for.

Yaohong Jiang
Queen's U


(Sorry, I missed one step between steps 2 and 3: you have to rotate
the polygon and the intersection point so that all the polygon vertices
and the intersection point have the same z coordinates, since the point-in-
polygon test in RTNews works only for 2D point and polygons.

Rotating the polygon is equivalent to rotating the x-y-z coordinate system
as following: Given a point P(x,y,z) in x-y-z coordinate system, Let
(x', y', z') be the coordinates W.R.T the second coordinate system x'-y'-z'
Assume the two systems have the same origin and :
   x' has direction cosine t11, t21, t32      W.R.T  x-y-z system
   y' has ................ t12, t22, t32      ...................
   z' has                  t13, t23, t33      ...................
( This also means that:
   x has direction cosine t11, t12, t13      W.R.T x'-y'-z' system
   y                      t21, t22, t23
   z                      t31, t32, t33
  t11, t12, etc. can be computed from the polygon plane easily.

Then we have : x' = t11*x + t21*y + t31*z
               y' = t12*x + t22*y + t32*z
               z' = t13*x + t23*y + t33*z

And lastly, remember to rotate the polygon and the intersection back
after the point-in-polygon test before the last step above.

Y. Jiang
From: eanv20@castle.ed.ac.uk (John Woods)
Newsgroups: comp.graphics
Subject: Re: X-rated GIFs
Keywords: GIF,sex
Date: 15 Sep 92 08:13:01 GMT
Organization: Edinburgh University

>>>Can anyone help me find the internet address of an anonymous ftp site
>>>for x-rated gifs?  Any advice will be warmly welcomed.


My advice is to stick to the high resolution hardcopy form known as
Porno Mags.  I should imagine the quality compares favourably, they're
portable and readily available.  Also, buying them in a newsagent
won't jeopardize the serious press --- it cannot be guaranteed that
the net will be retained as an almost-right if it becomes a clearing
house for this sort of stuff.

*******

This should not be taken as an endorsement of pornography in any way,
merely a recommendation that care should be taken to preserve the net
and its reputation.

				...John Woods

-- 
 /******* cut here ******* John Woods ******* cut here ********
 * Philosophy: Forsan et haec olim meminisse iuvabit (Virgil) *
 * Disclaimer: Every statement in this file is possibly !true *
 ******** cut here ******* John Woods ******* cut here *******/
From: hdnea@usho92.hou281.chevron.com (David Neal)
Newsgroups: comp.graphics.animation
Subject: more on the virtual reality book
Summary: isbn number for virtual reality ibm pc software
Keywords: isbn virtual reality ibm pc 3d
Date: 15 Sep 92 19:17:02 GMT
Distribution: na
Organization: Chevron


A few people wrote me about the 3d VR/wireframe software
for the PC.

Here's the reference

Virtual Reality Playhouse, Nicholas Lavroff
ISBN1-878739-19-0: $22.95

Published by Waite Group Press (415) 925-2575
Distributed by Publishers Group West, (800) 788-3123 (calif: 510-658-3453)


In the back are several ads for other books published by the Waite
Group about fractals, raytracing and the like. Also one of the
demos on the disk is actually a crippled version of a commercial
product. 

Fractal Creations, ISBN 1-878739-05-0, disk, poster, 3d glasses, $34.95
Image Lab, ISBN 1-878739-11-5, disk, poster $39.95
Ray Tracing Creations, ISBN 1-878739-27-1, disk, 3d glasses, $39.95


Dimension International
Zephyr One, Calleva Park
Aldermaston, Berkshire England RG7 4QZ
+44 (0) 734 810077




-- 
--
David Neal -- hdnea@hou281.chevron.com 
Conserve water, California's deserts need more cotton farms.
Newsgroups: comp.graphics.animation
From: msmith%peruvian.utah.edu@cs.utah.edu (Matthew Smith)
Subject: Re: Hi,
Date: 15 Sep 92 15:50:44 MDT
Organization: University of Utah CS Dept

In article <1992Sep15.145135.54760@qut.edu.au> bub@qut.edu.au writes:
>Why no people have interest in this group.
>

Call me a nobody.. *sniff* *sniff* *cry*

;)

What good books can we prescribe for all of the low-level routines behind 
3d graphics?  I've got my 3:

My engineer's calculus textbook.  One of the *most* handy sources for trying
to find all of the little tricks you can do with vectors.

Computer Graphics Principles and Practices (??) by Foley, Van Dam, et. al.
Not for the fient of heart, but would be good for the sleepless.  Jam packed
full of information.

Interactive Computer Graphics by Peter Burger and Duncan Gillies.  Kind of 
a lighter, less-filling, tastes-great, new and lemon scented version of 
Foley's book.  Easier to read.

I've also heard that the Graphics Gems series is a must have, unfortunately,
BookStar wants $50 for it, and they don't even have any on the shelves that
I can look at right now before shelling out the dough.  They're getting a
shipment, but I have no idea when it's coming in.  I remember looking through
a book that seemed to be what people describe GG as being, however I didn't 
take note at the time. *sigh*  If it was, then it's basically an encyclopedia
of 2-dimensional and 3-dimensional forulas.  

Thoughts, comments, FAQ requests?  Flames not need reply.


Matt Smith
msmith@peruvian.utah.edu
Student - University of Utah Department of Computer Science
Newsgroups: comp.graphics.animation
From: kaw4t@fulton.seas.Virginia.EDU (Kent A. Watsen)
Subject: Animation on the NeXT
Organization: University of Virginia
Date: Tue, 15 Sep 1992 03:13:07 GMT

Hi, I am writing a raytracer and I want to be able to animation 
a sequence of frames on the NeXT.  As of the moment, the only
method I know of is to save all these files as tiff images
and use Movie.app. However, this seems like a terrible way
of doing so due to the amount of overlap from one frame to the
next.  Does anyone know of a better way to do this, say like
using mpeg or something.

KeNT@virginia.edu
Computer Science Engineering
University of Virginia
Newsgroups: comp.graphics.animation
From: fullmer@rice.edu (Robert Fullmer)
Subject: Re: hello out there.  First post?
Organization: The Bavarian Illuminati
Distribution: na
Date: Tue, 15 Sep 1992 00:21:08 GMT

In article <mumble> nesiusra@sage.cc.purdue.edu (Rob Nesius) writes:

>  Hey, what's this group for?  Animation gifs or something?

Yes, you got the first post. This group is probably about the animation
of computer graphics, given that its name is comp.graphics.animation.

>  what was wrong with ftp sites?

They're difficult to carry a conversation and exchange ideas on.

>  Rob

Rob Fullmer    :    celine@athena.mit.edu    :    celine@rice.edu
Newsgroups: comp.graphics.animation
From: bryson@nas.nasa.gov (Steve T. Bryson)
Subject: visualization '92 and volvis92 call for student volunteers
Organization: Applied Research Office, NASA Ames Research Center
Date: 14 Sep 92 17:24:38
Distribution: comp.graphics.animation



   Visualization '92 and the 1992 Boston Workshop on Volume Visualization
			
	****	CALL FOR STUDENT VOLUNTEERS		****

1992 Boston Workshop on Volume Visualization:	
		   Oct 17 and 18 1992, 	       Boston, Mass.
Visualization '92: 
		   Oct 18 through Oct 23 1992, Boston, Mass.

The Visualization '92 conference and the 1992 
Boston Workshop on Volume Visualization are seeking student volunteers. 
Volunteers will work  twenty hours or less in exchange for
complete free registration in the conference.  As the two
conferences are being held at the same location on
successive dates, the same students may volunteer  for both
conferences.  Come learn about the state of the art in 
volume visualization and the use of computer graphics to
study complex scientific phenomena.  

Student volunteers will be responsible for their own
transportation and lodging for the conferences.  To assist
in costs, limited shared rooms will be made available on a
first-come first-serve basis.  All students who are enrolled
full time in the fall 1992 are eligible.  

For more information, send dates of availability and 
field of study to:

For Visualization '92:
	Steve Bryson
	MS T045-1
	NASA Ames Research Center
	Moffett Field, Ca. 94035-1000
	(415) 604-4524 fax: (415) 604-3957
	bryson@nas.nasa.gov

For the Workshop on Volume Visualization:
	Roni Yagel
	Department of Computer and Information Science
	The Ohio State University
	228 Bolz Hall
	2036 Neil Av. Columbus, Ohio 43210-1277
	(614) 292-0060, fax: (614) 292-2911
	yagel@cis.ohio-state.edu




--

Steve Bryson
MS T045-1
NASA Ames Research Center
Moffett Field, Ca. 94035
(415) 604-4524
bryson@nas.nasa.gov

Newsgroups: comp.graphics.animation
From: ferg@unixg.ubc.ca (Barry Douglas Ferg)
Subject: Re: Temporal aliasing
Organization: University of British Columbia, Vancouver, B.C., Canada
Distribution: na
Date: Wed, 16 Sep 1992 00:26:47 GMT

In <1992Sep15.200225.15851@jato.jpl.nasa.gov> dave@jato.jpl.nasa.gov (Dave Hayes) writes:
>So how does one view the output of a rayshade animation run in real
>time? Is there software for this?

Rayshade will spit out a bunch of frames.  Merely convert this series of
frames into your favorite animation file format, and view with any number
of public domain viewers.  I usually use the FLI format, with a program
called DTA (Dave's Targa Animator) for making the animation file, and 
the widely available AAPLAY for viewing.  All this stuff is executed on
a PC, so you'll have to find your own methods if your platform is different.
(Programs are available via anonymous ftp; check with archie for where,
although wuarchive.wustl.edu:graphics/graphics is probably a good place
to start.)

Barry Ferg
Newsgroups: comp.graphics.animation
From: jblaine@fsu1.cc.fsu.edu (Jeff Blaine)
Subject: Re: Animation
Followup-To:  poster
Summary: Donations are being accepted...
News-Software: VAX/VMS VNEWS 1.3-4   
Reply-To: jblaine@fsu1.cc.fsu.edu
Organization: Florida State University
Distribution: na
Date: 14 SEP 92 22:06:34    

In article <1992Sep14.235239.10103@kpc.com>, hollasch@kpc.com (Steve Hollasch) writes...

>[First kick ass flame on comp.graphics.animation!  Nyah nyah, nyah-nyah-nyah!]
> 
>    B^)
> 
>______________________________________________________________________________
>Steve Hollasch                                   Kubota Pacific Computer, Inc.
>hollasch@kpc.com                                 Santa Clara, California

Donations are also welcome for Steve to figure out how to properly say:

	Nyah nyah nuh nyah nyah.

----------------------------------------------------------------------------
Jeff Blaine - jblaine@fsu1.cc.fsu.edu - Jr. CS Major - Whee  ---------------
----------------------------------------------------------------------------
From: hdnea@usho92.hou281.chevron.com (David Neal)
Newsgroups: comp.graphics.animation
Subject: Re: Temporal aliasing
Date: 16 Sep 92 00:08:32 GMT
Distribution: na
Organization: Chevron

In article <1992Sep15.200225.15851@jato.jpl.nasa.gov> dave@jato.jpl.nasa.gov writes:
>ferg@unixg.ubc.ca (Barry Douglas Ferg) writes:
>>You might try using Rayshade.  It supports motion blur and animation in a
>>limited way, although I don't know if anyone has ported it to Macs yet.
>
>So how does one view the output of a rayshade animation run in real
>time? Is there software for this?
>
>-- 
>Dave Hayes - Network & Communications Engineering - JPL / NASA - Pasadena CA
>dave@elxr.jpl.nasa.gov       dave@jato.jpl.nasa.gov         ...usc!elroy!dxh
>
>   People who think they know all are often insufferable.
>            Rather like those who imagine that they know nothing.

I'm assuming you mean _playback_ a rayshade animation in realtime,
as Rayshade does not output individual frames anywhere near realtime.

But, if that's really what you meant, the getx11 program (mentioned
below) will sit on a pipe and paint data onto the screen of
your choice almost as fast as it gets it.

Usually, Rayshade renders into RLE (Utah Raster Toolkit) files. 
If you're using an X11 workstation, URT's getx11 program supports 
animating the Rayshade files at whatever speed your hardware will support.  

Unfortunately, since we are talking about X here, you need to
load the entire animation into X server memory. If it doesn't
fit, your animation's frame rate will suffer as getx11 loads
frames from disk.


I'm not sure what frame rate you would consider real-time playback.

If you want a subjective datapoint, I've had very nice results
using a 17" NCD color terminal driven by a DEC 5000. In fact,
we watched 3 days worth of data on Hurricane Andrew and it
was truly impressive.

If you want another subjective datapoint, playback to the local 
framebuffer on a high-end RS/6000 (sorry, don't know the model #) 
is 'kick-ass'. 


-- 
--
David Neal -- hdnea@hou281.chevron.com 
Conserve water, California's deserts need more cotton farms.