HDTenEightyP/NetNews huggingface dataset:
From: ar559@cleveland.Freenet.Edu (Jan Buitenhuis)
Subject: Re: Q: graphics lib similar to PHIGS+ for PC ?
Organization: Case Western Reserve University, Cleveland, Ohio, (USA)
Date: Sat, 25 Jul 92 07:36:58 GMT


Hello,

I would like to draw your attention to 3D RenderLib for
Windows.

3D RenderLib for Windows is a 3D graphics Dynamic-Link
Library. Some of its features are:
  

unlimited displays (windows),
unlimited viewports (display regions),
unlimited directional, point, and spot light sources,
wireframe, non-shading, flat-shading, gouraud-shading, 
and phong-shading. clipping-planes,
hierarchical object oriented data storage,
etc, etc, etc, etc....


I have uploaded a demo called, '3drender.zip' to 
ftp.cica.indiana.edu (129.79.20.84). It is in the 
'pub/pc/win3/demo' directory.

Gr. Jan

##
From: chubbard@beta.tricity.wsu.edu (Charles William Hubbard)
Newsgroups: comp.graphics
Subject: Mitsubishi Color Video Printer Programming Problem
Date: 24 Jul 92 18:52:24 GMT
Organization: Washington State University Tri-Cities, Richland

Please excuse me if this is a little off-topic, but I am desperate for
information and this seemed like an appropriate place to look.

I am having trouble programming for a Mitsubishi CP210U color video
copier and I was hoping someone here could help me out.  I want to be
able to send image data directly to the CP210U through its Centronics
parallel interface.  So far we have had only limited success.  I can get
a GIF image out that doesn't look bad but the aspect ratio is screwed up
and it's not clear to me how to select an image resolution.  So far all
my printing has been of 640x525 images because that's the only res that
doesn't bomb on me!  (I usually get a timing error (E0) whatever that
means).

I have the Mitsubishi operation manual but it is a poor translation from
the Japanese and is filled with typos and inconsistancies to boot -
worthless.  I've called a dozen different Mitsubishi numbers but
I either get directed to another department or have to leave a voice
mail message that never gets heard by anyone.

Do any of you have any experience with this printer?  Specifically, what
is the significance of the timing parameters (H-SIZ, H-RES, V-LIN, etc)
and how can I calculate them to get out images at resolutions and aspect
ratios of my choosing?  The manual really doesn't explain the meaning or
importance of these constants at all.  Any information on the theory of
operation of the copier or a little C source code would be greatly
appreciated.

Please leave me e-mail at chubbard@beta.tricity.wsu.edu as I don't
normally get a chance to read this newsgroup.

Thanks in advance,
Charlie Hubbard
Newsgroups: comp.graphics
From:  wrf@ecse.rpi.edu (Wm Randolph Franklin)
Subject: Re: Fast intersection DETECTION for convex polyhedra?
Organization: Rensselaer Polytechnic Institute, Troy, NY
Date: Wed, 22 Jul 1992 22:32:46 GMT


In article <1992Jul9.134621.20715@fel.tno.nl> on Thu, 9 Jul 92 13:46:21 GMT,
rxkc2@fel.tno.nl (R. Kiel) writes:

  > For a real-time visualisation system I need an algorithm that will
  > tell me whether or not two convex polyhedra intersect.

A separating plane for the two polyhedra exists iff they don't
intersect.  This can be formulated as a linear programming problem and
solved.  It should be reasonably fast.

This method meets your req to determine the intersectability w/o finding
the intersection, but it may be too complicated.

A 2-D version of this might be mentioned somewhere in Preparata and
Shamos.
-- 
Wm. Randolph Franklin,  wrf@ecse.rpi.edu, (518) 276-6077;  Fax: -6261
ECSE Dept., 6026 JEC, Rensselaer Polytechnic Inst, Troy NY, 12180 USA
Newsgroups: comp.graphics,alt.book.reviews
From: mmasood@magnus.acs.ohio-state.edu (Mohammed A Masood)
Subject: Graphics book
Organization: The Ohio State University
Date: Thu, 30 Jul 1992 18:32:38 GMT

Hi, could any one on the net recommend a good book which deals with different
kinds of graphics files, .gif, tiff, rtt and so on.  I mean a book explaining
these files and telling us how to convert from one form to another
Thanks in advance
From: cthulhu@sparky.cis.ufl.edu (Mark Kupper)
Newsgroups: comp.graphics
Subject: Re: Test
Date: 24 Jul 92 14:28:02 GMT
Organization: Univ. of Florida CIS Dept.

In article <1992Jul20.032504.3489@usenet.ins.cwru.edu> aa617@cleveland.Freenet.Edu (Scott Berringer) writes:
>
>Does anyone read this group???

  Nope.
Newsgroups: comp.graphics
From: jonas-y@isy.liu.se (Jonas Yngvesson)
Subject: Re: Latest Source of XV - Please Post
Organization: Dept of EE, University of Linkoping
Date: 29 Jul 92 20:26:06 GMT

ratinox@splinter.coe.northeastern.edu (Richard Pieri/Stainless Steel Rat) writes:
>3: xloadimage is similar in functionality to XV, but XV reads more formats,
>allows all kinds of nifty colormap editing, scaling, and *saving* in a
>number of formats. XV's quantization is also much better than xloadimage's.

I'm not sure that XV reads more formats. The version installed here (xli 1.07
based on xloadimage 3.01) reads the following formats:
  FBM Image
  Sun Rasterfile
  CMU WM Raster
  Portable Bit Map (PBM, PGM, PPM)
  Faces Project
  GIF Image
  JFIF style jpeg Image
  Utah RLE Image
  X Window Dump
  McIDAS areafile
  G3 FAX Image
  PC Paintbrush Image
  GEM Bit Image
  MacPaint Image
  X Pixmap
  X Bitmap


I myself use XV however because of the very nice interactive interface.

--Jonas
-- 
------------------------------------------------------------------------------
 J o n a s   Y n g v e s s o n          email: jonas-y@isy.liu.se
Dept. of Electrical Engineering	        voice:  +46-(0)13-282162          
University of Linkoping, Sweden         fax  :  +46-(0)13-139282
Xref: sparky comp.graphics:8202 alt.graphics.pixutils:1826
From: adrianho@barkley.berkeley.edu (Adrian J Ho)
Newsgroups: comp.graphics,alt.graphics.pixutils
Subject: Re: Latest Source of XV - Please Post
Date: 27 Jul 92 11:23:28
Organization: University of California, Berkeley
NNTP-Posting-Host: barkley.berkeley.edu
In-reply-to: alexw@cyclops.intel.com's message of 27 Jul 92 04:54:22 GMT

In article <12497@inews.intel.com> alexw@cyclops.intel.com (Alex Witkowski) writes:
>Please post the source code for XV (I believe this also known as xview
>and xloadimage).  I do not have access to anonymous ftp as far as I can
>tell. 

I'd recommend against this.  The compressed tar'd XV distribution
takes up almost 2MB.  Shoveling this amount of data to *every* Usenet
site that carries either comp.graphics or alt.graphics.pixutils would
be a waste of bandwidth, to say the least.  Worse, there will likely
be requests for reposts for missing parts (possibly because local news
spools overflowed) -- haven't encountered a large posting that wasn't
accompanied by a dozen of those...

There's a better alternative for those of you without ftp: DEC offers
an FTP-by-mail service which may be listed in the FAQ (I haven't
looked at it recently).  In case it isn't, send mail containing the
single word "help" to:

	ftpmail@decwrl.dec.com

The location of XV?

	export.lcs.mit.edu:/contrib/xv-2.21.tar.Z
--
-----------------------------------------------------------------------------
Adrian Ho, He With The Embarrassingly *Dead* Passion ** Phone: (510) 642-5563
System Manager, CFD Lab, ME Dept, UC Berkeley * adrianho@barkley.berkeley.edu
Maintainer, Tcl/Tk Contrib Archive ---- barkley.berkeley.edu [128.32.142.237]
  Send all Tcl/Tk Archive-related stuff to tcl-archive@barkley.berkeley.edu
From: laborel@zig.inria.fr (Louis Laborelli)
Newsgroups: comp.graphics
Subject: in-betweening for cartoons .
Date: 28 Jul 92 15:07:33 GMT
Organization: INRIA, Sophia-Antipolis (Fr)

Hi netland,
I would like to know more about computer aided cartoons, 
ie the use of a program to interpolate between different frames.
Is the process completly automated now ? 
Any references or addresses of companies doing that ?
How different it is from morphing ? 
Thank you for any information. 


-- 
 Louis Laborelli
 Universite de Nice Sophia Antipolis  / phone: (33) 92 94 26 89	       
 I3S LISAN - CNRS Batiment 4          \	telex: GRP 970006F
 250 rue Albert Einstein	      / fax: (33) 92 94 28 98
 Sophia Antipolis	              \ e-mail:laborel@zig.inria.fr
 06560 Valbonne FRANCE                / or laborell@mimosa.unice.fr
From: mjb@netcom.com (Martin Brown)
Newsgroups: comp.graphics
Subject: looking for world *map* bitmap
Date: 31 Jul 92 16:31:56 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

The msg subject says it all.  I'm looking for a public domain bitmap of a
map (not globe from outter space) of the world.

Any pointers where to look would be appreciated.

Thanx.
-- 

                                   - mjb -

                                mjb@netcom.com
From: scavanag@neumann.une.edu.au (Steven Cavanagh)
Newsgroups: comp.graphics
Subject: More on Borland's putimage()
Date: 21 Jul 92 05:48:37 GMT

I'm just getting the hang of Borland's C++ 3.0, and I want to know:

is there any way you can draw pictures with a paint program, and
then use them in your programs with getimage() and putimage()
(or any other method, for that matter)

if so, how? and what sort of paint program should you use?



_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-
                                |
Steven Cavanagh                 |        So many women-
(Cav)                           |
                                |                      -So little charisma.
scavanag@neumann.une.oz.au      |
                                |
_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-

Newsgroups: comp.graphics
From: abucior@ugly.UVic.CA (Alan  Bucior)
Subject: Deriving texture maps
Organization: University of Victoria, Victoria, BC, Canada
Date: Thu, 30 Jul 92 22:59:51 GMT

OK. Everyone (well, almost everyone) is familiar with the idea of texture
mapping in the context of computer graphics. I.E. You have a 3D object that
you wish to render, and you wrap a texture or image onto that object to create
a more realistic image.  With ray-tracing, the whole process is not entirely
difficult to program if you know what you're doing.

Anyway, the idea I had was: Given that you have a ray traced, rendered image,
and that you have the original object and viewing information regarding the
rendered scene, it should be possible to derive the original texture map.
I can think of one fairly simple algorithm that could do it.

What I was wondering is: Has this been done before? Is this a new idea?
It obviously has more far reaching applications than creating pretty 
pictures, and before I go and start work on something like that, I was
interested in finding out about previous work in this area.

Any help would be appreciated.
Al.

-- 
 Alan Bucior             |  University of Victoria  
 abucior@sirius.uvic.ca  |  Victoria, British Columbia, CANADA
From: pcb@gunfight.austin.ibm.com (Peter C. Bahrs)
Newsgroups: comp.graphics
Subject: Very nice color printer wanted, preferably Postscript
Date: 23 Jul 92 19:59:15 GMT
Organization: IBM, Austin

The title says it all.  If you make or know of a company who makes very
nice color printers, hopefully postscript compatible.

Thanks for your time.
Peter
-- 
/*--------- These are my own opinions....Thanks in advance...  --------------+
|     Peter C. Bahrs         internet: pcb@gunfight.austin.ibm.com           | 
|     AIX PS/2 R&D                     peterb@bcrvmpc1.vnet.ibm.com          |
+---  Boca Raton, Florida ------ vnet: peterb at bcrvmpc1 ------------------*/
Newsgroups: comp.graphics
From: canau@colombo.puug.pt (Carlos Canau)
Subject: LINE TESTING FOR PROFESSIONAL ANIMATION
Followup-To: canau@ul.pt
Summary: software for the IBM-PC
Originator: canau@colombo
Keywords: line-testing, animation
Organization: PUUG - Grupo Portugues de Utilizadores de Sistemas UNIX(tm)
Date: Fri, 31 Jul 1992 09:13:55 GMT



   Hi, there!

   I'm looking for software for the IBM-PC capable of doing
    "LINE TESTING FOR PROFESSIONAL ANIMATION".
   I've heard about "TOKI LINE TESTING", but it is for the Atari-ST.

   I'm looking for contacts, company addresses, software names, etc...
   If anyone could help me I would be very gratefull...

   Thanks,
   by(e) khanau

>----------------------------------------------------+------------------------<
> -@-                                            -@- | Carlos Canau           <
>  I When I was dreaming, I was still falling...  I  |                 ,   ,  <
>  I ...when I was falling, I was still dreaming. I  |                  9 3   <
> -@-                                            -@- |  canau@ul.pt      '    <
>----------------------------------------------------+------------------------<
Xref: sparky comp.graphics:7982 comp.windows.x:14128
From: aak@media03.UUCP (Arjen van den Akker)
Newsgroups: comp.graphics,comp.windows.x
Subject: ColorMaps / Palettes
Keywords: colormap
Date: 21 Jul 92 07:56:58 GMT
Organization: Mediasystemen, Netherlands


Hello world,

In spite of some fruitless attempts I'll try it again:

Does anybody know where to find predefined colormaps / palettes with
256 entries of RGB values (or some other color model)? I don't believe
there is nobody out there using some sort of colormap. Especially I'm
looking for a colormap with as many perceptually distinct colors as 
possible. If you have any information, please let me know. I've been 
trying to find some maps for a long time already. I will post useful 
responses to this newsgroup.

please E-mail: sun4nl!media03!aak


Thanks a lot,

            Arjen van den Akker
From: kassel@oasys.dt.navy.mil (Ben Kassel)
Newsgroups: comp.graphics
Subject: Initial Graphics Exchange Specification
Date: 23 Jul 92 03:08:18 GMT
Reply-To: kassel@oasys.dt.navy.mil (Ben Kassel)
Organization: Carderock Division, NSWC, Bethesda, MD

I am looking for anyone who has experience with the exchange of data
between CAD systems using IGES.  Most specifically

the name of the systems
Version of the IGES preprocessor
Version of the IGES postprocessor
Successes
Failures
Custom implementations
Experience with IGES/PDES Organization

Thanks in advance

-- 
       Ben Kassel  [kassel@oasys.dt.navy.mil]     |                     
            David Taylor Research Center          |    WORLD CHAMPION 
             CAD/CAM Integration Branch           |  WASHINGTON REDSKINS 
                 (301) 227-1355                   |
From: S.Marshall@sequent.cc.hull.ac.uk (Simon Marshall)
Newsgroups: comp.graphics
Subject: Pointer to concave->convex polygon & travelling salesman anyone?
Date: 21 Jul 92 10:17:47 GMT

Hi, all.  Please can anyone give me a quick hand?  (And a don't mean clap,
						    clap, clap...)

I would be greatful if anyone could point me to where I could get information
on converting planar polygons with concave boundaries to planar polygons with
convex ones (I was sure it was in Graphics GEMS I or II, but...).  I'd be happy
to be pointed with a ref or two.

Also, where could I get some information on optimum ways of visiting a network
of nodes (ie. the old travelling salesman chestnut).  Again, pointers would be
just fine.

Many thanks...  If anyone is also interested, I'll forward anything I get, just
let me know.

Simon.
_______________________________________________________________________________
Simon Marshall, Dept. of Computer Science, University of Hull, Hull HU6 7RX, UK
  "Football isn't about life and death.  It's more important than that." Bill
Email: S.Marshall@Hull.ac.uk    Phone: +44 482 465181    Fax: 466666   Shankley
From: kenb@amc.com (Ken Birdwell)
Newsgroups: comp.graphics
Subject: fitting to a NURBS surface
Date: 23 Jul 92 03:58:36 GMT
Distribution: na
Organization: Applied Microsystems, Redmond, WA


I'm looking for some code (or at least a good reference) that will fit a NURBS
surface to a bunch of 3D points (ie. X,Y,Z data).  I've orginized the points 
so that they all have reasonable U,V coordinates (rangeing from 0 to 1), so 
everything is ready for spline surface fitting.  I'm currently fitting a 
parametric polynomial surface, and it works fine, but I would much rather 
generate a NURBS surface.  

I have a lot of points (around 10,000), so I need an algorithm that 
generates far fewer nodes than the number of points.  I know this will only 
appoximate the surface, but since the data's fairly noisy, this turn out to 
be a good thing.

I've found a lot of papers that discuss specific things like "blossoming" 
and other node selection methods at a fairly sophisticated level, but I need 
something that talks about fitting NURBS at a much more basic level.  
Something along the lines of pseudo-code would be great, I'm not much of a 
mathematician.  The only papers I've been able to find at that basic of a 
level only deal with lines, and I'm at a loss as to how to extend their 
descriptions into surfaces.  Any help would be greatly appreciated.


--
From: zmcg0c@trc.amoco.com (Maurice C. Gehin)
Newsgroups: comp.graphics
Subject: Re: 24 bit display of 24 bit images in X on DECStation 5000/240
Keywords: 24 bit
Date: 22 Jul 92 22:46:31 GMT
Organization: Amoco Production Company, Tulsa Research
Originator: zmcg0c@gpss20


I'm interested to do the same thing but on a silicon graphics !

Thank for any help !
From: kam@rangkom.MY (Kamsuriah bt. Ahmad)
Newsgroups: comp.graphics
Subject: Skeletonizes of a Binary Image
Keywords: Binary Image
Date: 22 Jul 92 03:16:08 GMT
Organization: MIMOS, Malaysia

I need more information on the easiest approach to skeletonized of a binary
image. Should I use a neighbourhood operation or a kernel. If I have
to use a kernel what is the value of the kernel.
From: rdlankes@rodan.acs.syr.edu (Virtual Dave)
Newsgroups: comp.graphics
Subject: Convert to SGO, Flip Iris
Date: 23 Jul 92 16:00:18 GMT
Organization: Syracuse University, Syracuse, NY

I'm starting to work on the Iris and Showcase specifically. There is
a function that allows you to import SGO and Flip 3D models. My
question is, are there any utilities for converting other 3D formats
to these. i.e. dxf to SGO or flip.

This would be a great help.

Thanks in advance,


-------------------------------------------------------------------------------
|R.David Lankes (Virtual Dave)| Virtual Realities/Synaesthatic Communication  |
|  rdlankes@rodan.acs.syr.edu |     "We'll solve VIRTUALLY any problem"       |
-------------------------------------------------------------------------------
Newsgroups: comp.graphics
From: mdf+@cs.cmu.edu (Mike Fox)
Subject: Foley, Van Dam... errata file
Date: Tue, 21 Jul 92 14:42:31 GMT
Organization: School of Computer Science, Carnegie Mellon
Distribution: comp.graphics


Hi. Someone mentioned an errata file for Computer Graphics: Principles and
Practice which is supposed to be located at

graphtext@cs.brown.edu

(this address is also mentioned in the back of the book).

I can't seem to ftp to that site, or various permutations of that site. Is
it normally possible to do this, or do you have to send email requesting the
errata file. Just how do you get your hands on this stuff? 

(if someone has the file and would volunteer to send it to me that would be
nice too)

-mike

##############################################################################
  The preceding has been carefully doctored to not contain a single opinion.
   Michael Fox  (mdf@maps.cs.cmu.edu) work: 412-268-8801 home: 412-422-6714
           Carnegie Mellon University - School of Computer Science.
                   5000 Forbes avenue, Pittsburgh, PA 15213.
                        (but originally from Montreal)
##############################################################################
Newsgroups: comp.graphics
From: sjm@miles.com (Scott Mark)
Subject: Re: Angle between two coordinate locations
Organization: Miles Inc., Diagnostics Division, Elkhart, IN
Date: Fri, 24 Jul 1992 12:42:53 GMT

In article <1992Jul22.234146.5571@uniwa.uwa.edu.au> watson@maths.uwa.oz.au (David Watson) writes:

[Many interpretations of picture given]

I think by now someone should have guessed that the angle intended is between
the line <X2,Y2>-><X1,Y1> and the line <X2,Y2>-><infinity,Y2>.



The original image, embellished with 3rd point:

>>>I have a problem where I need to obtain the angle between two points
>>>on the screen.  For instance:
>
>>>        +------------------------------------------+
>>>        |   * <-point 1                            |
>>>        |                                          |
>>>        |                                          |
>>>        |                                          |
>>>        |                                          |
>>>        |                                          |
>>>        |                                          |
>>>        |                   * <-point 2            |   * <-point 3
>>>        |                                          |
>>>        +------------------------------------------+
>
>>>I would expect the function to return the angle as being 135 degrees
>>>( or should if my picture was accurate )  Any help would be greatly
>>>appreciated.  Thanks
>
>>I'm a little confused, How do you define an angle between two points without
>>first defining the location of the vertex.  Is the vertex just assumed to be
>>the origin (0,0)?
>>Edward M.Starczewski       email: stare@lonex.rl.af.mil
>
>I wondered about that too, but if it were (0,0) the angle returned
>would be less than 135 degrees.
>Give us a clue, Randi


Scott Mark
sjm@miles.com
From: idf@cs.bham.ac.uk (Ian Fitchet)
Newsgroups: comp.graphics
Subject: Apparent loss of colour info
Date: 24 Jul 92 16:28:11 GMT
Distribution: comp
Organization: School of Computer Science, University of Birmingham

Hi,

	I would be grateful if someone would explain/give me some
pointers as to why I am losing colours with some image filtering.

	I have a 8bit colour TIFF file produced on a Mac.  I used  the
Apple File Conversion routines to get a 8bit TIFF file on UNIX - point
one here is that it is now a grayscale image :-(.

	I have the xtiff package and that displays the image quite
well - at least I assume so as its now in b+w not colour but at least
there seems to be plenty of shades.

	I have compiled up the ImageMagick filters and converted my
TIFF to MIFF.  When I display the MIFF it looks dark in comparison
(see later) but converting it back it looks ok (slightly lossy
perhaps).

	When I convert the MIFF to GIF, xwd, rasterfile etc the
picture looks like the MIFF displayed ie has lost a load of colour
(now greyscale) information, and is down to approx 60 colours (it
varies with the filter).

	My question is, given that MIFF hasn't actually lost any (or
much) information, what has happened in the filters - is it not
possible to transfer the colour data?

--
Cheers,

	Ian

-------------------------------------------------------------------------------
Ian Fitchet     				      I.D.Fitchet@cs.bham.ac.uk
School of Computer Science
Univ. of Birmingham, UK, B15 2TT
Newsgroups: comp.graphics