HDTenEightyP/NetNews huggingface dataset:
From: m@jacobi.uucp (mark mccallum)
Subject: Marching Cubes Patent Info Wanted
Organization: Yale University, New Haven, CT
Date: Mon, 25 Jan 1993 22:07:03 GMT


I seem to recall previous a thread about marching cubes being patented. A
client of mine was handed specs that are close to mc to implement. Any info
would be greatly appreciated.

thanks in advance,
mark
Newsgroups: comp.graphics
From: nwatson@enuxha.eas.asu.edu (Nathan F. Watson)
Subject: EPS - Encapsulated Postscript - HOW?
Organization: Arizona State University
Date: Tue, 26 Jan 1993 03:45:29 GMT

I haven't seen this question posted in a while, and I need
to know the answer:

   How do I produce an Encapsulated Postscript (.EPS)
   file?

I can generate a PostScript file OK, but want to include the
results in an MS-Word document.  From my understanding I need
a .EPS file.  The PostScript book I have does not have details
about .EPS files.

Thank you for your attention.  E-mail would probably be better.

--
---------------------------------------------------------------------
Nathan F. Watson                             Arizona State University
nwatson@enuxha.eas.asu.edu                Computer Science Department
From: hartung@crl.ucsd.edu (Jeffrey P. Hartung)
Newsgroups: comp.graphics
Subject: Re: Millions! of colors...
Date: 26 Jan 93 16:32:26 GMT
Organization: University of California, San Diego

In article <1993Jan21.031952.4994@leland.Stanford.EDU> ledwards@leland.Stanford.EDU (Laurence James Edwards) writes:
>Well, yes you're right you can't use that many, but note there is a difference
>between most 8-bit cards and 24bit cards. Almost all 8bit cards use a lookup
>table with 24bit entries, whereas 24bit cards do not use a lookup table at all.

Very few (S)VGA cards actually have DACs that can do 8-bits per primary.  Most
only use 6-bits per primary.  The highest 2 bits are ignored in a 24-bit RGB
color specification.  A few have switchable DACs that can be made into 8-bit
per primary.  They are useful when you need to create a 256 color monochrome
gradient, for instance, or a 256 color greyscale image.

>Now all you really need is a 20bit card with a lookup table that has 24bit
>entries, and you're range of available colors would be exactly the same (on a
>1024x768 screen) as the 24bit card. But, now you've got a very large lookup
>table (3MB) in addition to you're screen memory, so it's cheaper and simpler
>from the hardware design standpoint to just go with the 24bits and no lookup
>table.

This would be silly since you'd have to send 3 bytes to specify the index
value (with the high nibble on one byte being ignored) in a 20-bit lookup
table and _then_ have the lookup table send the analog RGB signals to the
monitor.  Furthermore, with a good dithering algorithm and color optimization
routine, 256 colors can look pretty good under most circumstances if speed is
of the essence.

>Larry Edwards


-- 
 --Jeff Hartung--  	
 Disclaimer: My opinions only, etc., etc., BLAH! BLAH! BLAH!...
 InterNet - hartung@crl.ucsd.edu    	 BITNET - hartung@ucsd
 UUCP - ucsd!crl.ucsd.edu!hartung
Newsgroups: comp.graphics
From: ledwards@leland.Stanford.EDU (Laurence James Edwards)
Subject: Re: Millions! of colors...
Organization: DSG, Stanford University, CA 94305, USA
Date: Wed, 27 Jan 93 06:50:07 GMT

In article <1856@cogsci.ucsd.EDU>, hartung@crl.ucsd.edu (Jeffrey P. Hartung) writes:
|> In article <1993Jan21.031952.4994@leland.Stanford.EDU> ledwards@leland.Stanford.EDU (Laurence James Edwards) writes:
|> >Well, yes you're right you can't use that many, but note there is a difference
|> >between most 8-bit cards and 24bit cards. Almost all 8bit cards use a lookup
|> >table with 24bit entries, whereas 24bit cards do not use a lookup table at all.
|> 
|> Very few (S)VGA cards actually have DACs that can do 8-bits per primary.
|> [...]

yes that already has been pointed out, sorry I've been in the workstation world
for too long, its been 7 years since I worked on a PC ... most workstations
use 8 bits per primary.

|> >Now all you really need is a 20bit card with a lookup table that has 24bit
|> >entries, and you're range of available colors would be exactly the same (on a
|> >1024x768 screen) as the 24bit card. But, now you've got a very large lookup
|> >table (3MB) in addition to you're screen memory, so it's cheaper and simpler
|> >from the hardware design standpoint to just go with the 24bits and no lookup
|> >table.
|> 
|> This would be silly [...]

obviously ... that was the point of my little thought experiment.

Larry Edwards
Newsgroups: comp.graphics
From: bandy@netnews.jhuapl.edu (Mike Bandy)
Subject: Re: Need FAST hidden line removal
Organization: JHU/Applied Physics Laboratory
Date: Tue, 26 Jan 1993 17:25:36 GMT

mal4@ns1.cc.lehigh.edu (Marty Lamb) writes:

>Hi -

>     For a side project I'm working on, I'm doing some wireframe animation -
>     the only problem is that I can't think of any ways to do hidden line
>     removal FAST. . . any suggestions?

Check out David Rogers' "Procedural Elements of Computer Graphics".  He
covers the basic algorithms in a manner that's fairly easy to implement.

-- 

	Mike Bandy
	bandy@aplcomm.jhuapl.edu
	Johns Hopkins University / Applied Physics Lab
Newsgroups: comp.graphics
From: laeeb@rivm.nl (Erminio Ballerini)
Subject: Re: S3 chips data books & VESA drivers
Keywords: S3 VESA
Organization: RIVM, Bilthoven, The Netherlands
Date: Tue, 26 Jan 1993 13:25:21 GMT

In article <C1Gp12.7BD@rivm.nl> laeeb@rivm.nl (Erminio Ballerini) writes:
>In article <1993Jan25.161236.14026@jussieu.fr> manson@ble.ecoledoc.ibp.fr (Richard MANSON) writes:
>>  Hello,
>>
>> I am looking to the specifications for the S3 chip ( esp. 86C911 ). It
>>look close from the 8514/A, but not exactly the same.
>>
>> I search as well a VESA driver for this chip ( I have an awfull collection of  
>>VESA drivers, but no-one for my card, ie S3-based ).
>>
>> Actually, if you have an email address for S3 inc. it would be fine ...
>>
>>--
>>Richard Manson, Universite Pierre et Marie Curie ( Paris VI )
>>Email : manson@ecoledoc.ibp.fr
>>
>>PS : 32k colors drivers for windows for S3, anyone ?
>      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
I meant to say:  Yes please !



--
Erminio Ballerini             laeeb@rivm.nl               Phone +31 30-743681
Laboratory for Waste Materials and Emissions (LAE)        Fax   +31 30-293651
National Institute of Public Health and Environmental Protection
PO Box 1, 3720 BA Bilthoven, The Netherlands
Newsgroups: comp.graphics
From: clarke@ug.cs.dal.ca (Steven Clarke)
Subject: VHS/Computer Graphics
Organization: Math, Stats & CS, Dalhousie University, Halifax, NS, Canada
Date: Wed, 27 Jan 1993 17:20:27 GMT

I am not sure if this is off topic for this net group but I was wondering..

I have a VHS camcorder and a couple of VCR's.  I also have a 386 IBM clone.
WHat kind of hardware and software is necessary to transfer graphic images from the computer to the video tape.  SOme sort of interfaces (i.e genlock).
Any information would be greatly appreciated.  I prefer e-mail.         
clarke@ug.cs.dal.ca


Thanks
-Steve Clarke

Newsgroups: comp.graphics,comp.sys.mac.programmer
From: mcentral@netcom.com (Media Central)
Subject: simple graph routines on MAC: WANTED
Followup-To: poster
Keywords: MPW C, source code, MAC
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Fri, 29 Jan 1993 01:41:32 GMT

Hi folks,
	I looked everywhere(i think so) for some simple graph routines to do
BarGraphs, PieChart, LineGraphs etc but iam unable to locate any.

Are their any commercial packages available on MAC which do the job.

BTW, they should work on MPW C.

Does anyone has any pointers to this problem of mine ?

cheers,
shahid


Newsgroups: comp.graphics,news.answers,comp.answers
From: torbenm@diku.dk (Torben AEgidius Mogensen)
Newsgroups: comp.graphics
Subject: Re: 256 color faster than 16 color ...why?
Date: 26 Jan 93 10:47:41 GMT
Organization: Department of Computer Science, U of Copenhagen

tef@acsu.buffalo.edu (Tom Frisinger) writes:

>Hello,
>	I've done some tests and found out that 256 is indeed much faster
>than 16 color at the same resolution.  Why is this?  I tested
>320x200x16 vs. 320x200x256, and 640x480x16 vs. 640x480x256, and
>800x600x16 vs. 800x600x256.  I figure that that covered all the
>memory ranges pretty well.  The 256 color out performed the 16 color
>by anywhere from 10%-40%!!!   The only possible explantion I can
>think of is that with 256 color they can to fast byte operations on
>memory vs. messing around with 4bits and shifting and all that.  Is
>this theory at all on the right track?

You haven't specified what system you ran the tests on and which
operations you tried. But, yes, I do believe your theory is right.
Operations that require access to individual pixels (e.g.
line-drawing) will be sped up if you can avoid masking operations at
every step. Bitmap moves etc. will usually be faster with 4bpp than
8bpp, as masking needs only be done at the edges.

	Torben Mogensen (torbenm@diku.dk)
From: israel@dvinci.USask.Ca (Israel Oznovich)
Newsgroups: comp.graphics
Subject: Re: Image Acquisition for 486 running Unix
Date: 28 Jan 1993 16:27:46 GMT
Organization: University of Saskatchewan, Saskatoon, Canada
NNTP-Posting-Host: dvinci.usask.ca
Keywords: Image Acquisition 486/Unix

In article <1993Jan26.214305.7828@eplrx7.es.duPont.com> rogerskm@eplrx7.es.duPont.com (Karen Rogers) writes:
>Does anyone know of image acquisition hardware/device drivers that
>will work on a 486 running Unix?
>
>We have been using a PC running DOS with Data Translation's Frame grabber
>and Multiplexer to capture RGB images. We then transfer the images to
>a Unix workstation and perform processing/analysis with the Khoros
>software.
>
>We'd like to know if it is possible to combine the functionality of these
>machines onto 1 486 running Unix?
>
>Thanks,
>
>Karen Rogers
>rogerskm@eplrx7.es.dupont.com

ATEK Information Systems, Inc. (formerly Redlake Corp.) sells
a frame grabber called SPECTRUM NTSC+ for 286/386/486 PCs.
They have device drivers for DOS, MS-WINDOWS, and Unix SYS V
(compatible with ISC Unix V. Rel 3.2 and X11/R3. We run it under
DOS. I highly recommend the card - its the best I've tested in terms
of $/performance. No, I have no association with the company. I just
bought one frame grabber, and intend to buy more in the near future.
Their technical assistance on the phone is great and they are friendly
enough to send you free software updates and new manuals by request.
I have to admit that I am a little tired of the high nose/high price
approach by Data Translation, which one of the reasons for recommending
'other venders'.
yours,
Israel Oznovich.
israel@dvinci.usask.ca
Newsgroups: comp.graphics
Subject: Help
From: serhienk@cobber.cord.edu (David Serhienko)
Date: Thu, 28 Jan 1993 08:00:18 GMT
Organization: Concordia College, Moorhead, MN

BTW, what do you know about scanners?  I am looking to scan a large amount
of data because I can't afford photocopy costs and there are other motives as
well, but I was looking to scan a lot of data and hopefully convert it into
some text/editable form.  What I don't want is to end up with massive 
graphic files for each page.  What I want to know is the following:
	How much is a scanner to buy/rent?  Amiga or 3/486 compat?
	How good is character recognition software?  Is anything worthwhile
		available free/shareware?  On the net?
	How long does the software/hardware take to work?
	Do you know anyone willing to rent/loan/sell the necessary gear?
		Preferrably in that order...B->
	Other considerations...?

	I know htis seems to be coming out of the blue, but what can I say?
I have an idea and I act on it if possible...  What I am asking is for the      
possibility...  Ask anyone you can think of.  

advaTHANKSnce
David "I don't KNOW what the hell a Cobber is!" Serhienko
serhienk@cobber.cord.edu
From: af774@cleveland.Freenet.Edu (Chad Cipiti)
Newsgroups: comp.graphics
Subject: DMORF V. 0.12
Date: 22 Jan 1993 17:52:15 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


Has anyone out there used DMORF?  I'm having problems with it.....
 I cannot get it to make another line in the mesh.  Is there
 a problem with the program, or is the version I have just
 crippled in that respect until I register it?

Thanks alot!

Chad


-- 
    ....                  SHARK ENCOUNTER
~ ~  :::::. ~~~  ~   ~      new in 1993             Chad Cipiti
 ~~ ::::::::. ~   ~~     Sea World of Ohio   af774@cleveland.freenet.edu
~~.:::::::::::.~ ~~~ ~    "Make Contact."
From: slzg4@cc.usu.edu
Newsgroups: comp.graphics
Subject: Help me, need GUI for IBM and UNIX.
Date: 22 Jan 93 09:38:24 MDT
Organization: Utah State University

I am looking for a free GUI shareware for IBM and UNIX. Would anyone give me a
direction ?
Thank you.

K.Suwat, Utah State University
From: hartung@crl.ucsd.edu (Jeffrey P. Hartung)
Newsgroups: comp.graphics
Subject: Re: Multiple Images within a GIF datastream
Date: 21 Jan 93 05:29:50 GMT
Organization: University of California, San Diego

In article <710@esun179.gdc.com> haggerty@gdc.com writes:
>
>   I'm writing a program which takes two GIF files and concatinates them into
>one GIF file with multiple images. According to the GIF format specification,
>a GIF datastream can contain more than one image....

[stuff deleted]

>However, the decoders I am using to display the GIF file, do not seem to
>support multiple images in a GIF data stream. I have browsed the code of
>these programs and they ignore whatever follows the first image.
>Can anyone tell me if multiple images within a single GIF datastream  
>is supported? I am not experienced in Graphics... Am I missing something?

Your understanding of the format is correct, but it is also the case that few
GIF viewers / decoders actually handle multiple images.  There used to be a
Turbo C library (with source code) called something like GIFLIB on
wsmr-simtel20.army.mil in the PD1:<MSDOS.GIF> directory.  Look for a file
called GIFLIB12.ZIP.  However, as I recall, it supported Hercules graphics
adaptors only, os you'll have to adapt the code to your hardware.  I also
recall that it was pretty slow code, but you might want to look at it to see
how multiple images are handled, then apply the information to your own code.



-- 
 --Jeff Hartung--  	
 Disclaimer: My opinions only, etc., etc., BLAH! BLAH! BLAH!...
 InterNet - hartung@crl.ucsd.edu    	 BITNET - hartung@ucsd
 UUCP - ucsd!crl.ucsd.edu!hartung
Newsgroups: comp.graphics
Subject: Re: GIF display for Microsft Windowsdir
From: djlewis@ualr.edu
Date: 25 Jan 93 15:47:46 GMT
Distribution: world
Organization: University of Arkansas at Little Rock

In article <1jndr7INN17v@cs.widener.edu>, YOUNG@tattoo.cs.widener.edu (Rob Young) writes:
> 
> 	I am posting this for a friend that doesn't have net access (yet).
> 	I believe he is referring to a PD version.  Thanks in advance.
> 
> 
> 	I have a program (off the Net) which loads the GIF image of my choice
> into the root window of my VAXStation.  I have a friend who has an MS-DOS
> or MicroSoft Windows machine, who would like to do the same thing.  Are you
> aware of any programs out on the Net which will accomplish this?  Thanks!
> 
> 
>                                                      young@tattoo.cs.widener.edu
> "Men are conservatives when they are least vigorous, or when they are most 
>  luxurious.  They are conservatives after dinner."
> 	--Ralph Waldo Emerson	 
Convert the image to a .bmp file and use Windows control panel and select
the .bmp file for wallpaper. Is this what you mean?
Don Lewis
<djlewis@ualr.edu>
From: chribeag@w254zrz.zrz.tu-berlin.de (Christian Klass)
Newsgroups: comp.graphics
Subject: Needing 3D Studio 2.0 Objects
Date: 25 Jan 1993 14:41:07 GMT
Organization: ZRZ der TU-Berlin
Distribution: world
NNTP-Posting-Host: w254zrz.zrz.tu-berlin.de

Hello there,
I`m desperatly looking for 3D objects, which I can use for
3D Studio (from Autodesk). Is there a site where I can get
those objects or programs which can convert between different
object-formats?

Please help me...

Greetings,
           Chris

Btw. are there any Star Wars 3d objects???
From: jregehr@vulcan.ksu.ksu.edu (John David Regehr)
Newsgroups: comp.graphics
Subject: Summary: how to render shadows but not objects in PoV
Date: 27 Jan 1993 14:12:39 -0600
Organization: Kansas State University
Distribution: world
NNTP-Posting-Host: vulcan.ksu.ksu.edu


Thanks to all the people who replied with email and to this group.
	
There seem to be two easy ways to render just the shadows of 
objects:

1.  Put the camera and light source at the same point, and color
    the objects black.  This method does constrain the possible
    viewing angles, or course.

2.  Move the objects away from the plane that the shadows are to
    be cast on.  If the light source is far enough away, the
    magnification of the shadows becomes negligible.

Both of these methods work fine.  Another way (which I'm not sure
will work) is to cast shadows against a "frosted glass" plane
and place the camera so that it looks at the side of the plane
opposite the objects.

Finally, if one wanted to alter the code some, it seems like it
would be possible to add a keyword analagous to "no_shadows" that
would cause an object to be transparent to camera-rays but opaque
to shadow rays.

                                      - John Regehr

Newsgroups: comp.graphics
From: manson@ble.ecoledoc.ibp.fr (Richard MANSON)
Subject: S3 chips data books & VESA drivers
Keywords: S3 VESA
Organization: Universite Paris VI/Paris VII
Date: Mon, 25 Jan 1993 16:12:36 GMT

  Hello,

 I am looking to the specifications for the S3 chip ( esp. 86C911 ). It
look close from the 8514/A, but not exactly the same.

 I search as well a VESA driver for this chip ( I have an awfull collection of  
VESA drivers, but no-one for my card, ie S3-based ).

 Actually, if you have an email address for S3 inc. it would be fine ...

--
Richard Manson, Universite Pierre et Marie Curie ( Paris VI )
Email : manson@ecoledoc.ibp.fr

PS : 32k colors drivers for windows for S3, anyone ?
Newsgroups: comp.graphics,uiowa.comp.mac,uiowa.comp.ibm-pc,biz.comp.hardware,alt.graphics.pixutils
From: jlavelle@dsurgery (John P. W. M. Lavelle)
Subject: Re: Waddda ya like 'n Digitalizer Pads?
Date: Fri, 22 Jan 1993 04:37:53 GMT
Distribution: usa
Organization: University of Iowa, Iowa City, IA, USA
X-Newsreader: Tin 1.1 PL3

tclark@news.weeg.uiowa.edu (Terry Clark) writes:
: Does anyone have any recommendations on Digitilizer Pads?
: I'm looking for 12"x12" or slightly larger pad to use for 
: art work/image manipulations.  All suggestions appreciated.
: ____________________________________________________________

The Watcom digitiser board works quite well and is available for 12x12" 
Xref: sparky comp.graphics:14165 alt.graphics.pixutils:2969 alt.binaries.pictures.utilities:2694 alt.binaries.pictures.d:6309 alt.binaries.pictures.erotica.d:11291 comp.answers:9 news.answers:5416
Newsgroups: comp.graphics
Subject: Re: jobs in computer graphics
From: rsc@altair.csustan.edu (Steve Cunningham)
Date: Mon, 25 Jan 93 23:11:05 GMT
Organization: CSU Stanislaus
Summary: Here's how you get the handbook

mavuduru@peca.cs.umn.edu (Rama Mavuduru) writes:

> In <1993Jan22.181922.13624@wam.umd.edu> slt@wam.umd.edu (Sarah Louise Timko)
> writes:
> 
> >Hi, I'm not sure if this is the right place to ask this but it
> >doing art and animation on the computer.  Other than playing with
> >packages, how do I learn enough to get a job in this field,
> >Is there any good way to get a job, and in what area are most
> >of the companies?
> 
> 
> 
>         The best place to look for answers to such questions is:
> 
>                 SIGGRAPH Computer Graphics CAREER HANDBOOK,
>                 published in 1991.
> 
>         It has information about schools, courses, companies,
>         career profiles, etc.

This can be ordered from:

		Publications Marketing Manager
		ACM Press
		1515 Broadway
		New York, NY  10036
		1-800-342-6626
		1-410-528-8596 fax single-copy orders
		+1 410-528-4261 customer service, or orders outside 
			the USA or in MD or AK (8:15 - 4:15 M-F US 
			Eastern Time.)
		e-mail inquiries: ACMPUBS@ACMVM.BITNET
Newsgroups: comp.graphics
From: helgeaa@colargol.edb.tih.no (helgeaa)
Subject: 3D package for Win 3.x wanted
Organization: Colargol, Trondheim College of Engineering
X-Newsreader: TIN [version 1.1 PL8]
Date: Mon, 25 Jan 93 19:04:02 GMT

Does anybody know about any 3D-package for MS Windows? 
- or do I have to make it myself?

--
Helge O Aarstein |                                 | Helge O-)
Sverresgt. 8     |---------------------------------|----------- 
N-7013 Trondheim | You will still be here tomorrow | helgeaa at
Phone: 07-502782 | - but your dreams may not. (CS) | edb.tih.no
From: l137939@lehtori.cc.tut.fi (Lahti Jani)
Newsgroups: comp.graphics
Subject: Re: POVRAY made easy
Date: 25 Jan 1993 20:15:06 +0200
Organization: Tampere University of Technology, Computing Centre
Distribution: world
NNTP-Posting-Host: cc.tut.fi

In <1jpkf1$3ni@agate.berkeley.edu> aron@taos.ced.berkeley.edu (aron bonar) writes:

>PV3D is a front end modeler for POVRAY. Shareware, I believe. I haven't seen
>it on the net but you can get off a couple of BSS's... The Graphics
>Alternative or You Can Call Me Ray...sorry..don't have the numbers on me.

Is there any kind person who would post it to some binary group or send it to
me, because I (and many more) find it quite displeasing to pay for long inter-
continental phone calls...

-- 
_____________________________________________________________________________
Internet: l137939@cc.tut.fi  AXsh-net: ace@tap.tre.fi    Fidonet: 2:222/352.3
------------ for Pretty Good Privacy, use your finger or mail me ------------
Newsgroups: comp.graphics
From: lineber@lonestar.utsa.edu (Jerry M. Lineberry)
Subject: POVRAY made easy
Organization: University of Texas at San Antonio
Date: Fri, 22 Jan 1993 17:25:05 GMT


Hello, I was wondering if there is an easy way to learn povray. I've read the
documents that come with POVRAY. I did a few very simple examples that the
document gives. Not much of a problem. But I would like a syntax checker or a
program that will assist me in writing my first images. I tried to run the
program called AEWIRE but, was unable to get it to work. I'm not sure why.
The other day I saw a post about a program called PV3D, and would like to know
what it does. What would be the best utility for me? I have a 386SX-20Mz (no
math co-processor) and 2Mb of RAM. My computer has no problem drawing the
sample images.
-- 
--------------------------------Jerry M. Lineberry-----------------------------
lineber@lonestar.utsa.edu --------------------------- 71221.3015@compuserve.com
-------------------------------------------------------------------------------
Xref: sparky comp.graphics:14325 comp.windows.x.pex:709 comp.graphics.opengl:283