waashk/20ng huggingface dataset:
I am seeking some alternate solutions on how to turn a Postscript Type 1 or TrueType font outline into polygons that can be subsequently scan converted by a 3D scanline renderer.   I have been studying the problem of font conversion for a few years but have never had the need to implement such a system. Well, I now have the opportunity to write some font rendering software so I would like to have some of my questions answered before I jump into the deep end.  The main problem I face is how to use the even/odd or non-winding rules to turn the outlines into a single outline polygon (my renderer can handle complex polygons so there is no need to reduce the polygons to simple polygons). For example, in the letter "O" there are two outlines:  	1) The outside outline which is clockwise (TrueType font) 	2) The inside outline which is counterclockwise.  One common solution used by a number of rendering packages is to simply  connect the inner outline to the outer outline at the point where the two outlines are closest. This is equivalent to descibing a "polygon with holes". The renderer will then make the appropriate hole since the interior polygon edges are in the opposite direction to the outside edges.  I do not want to use this simplistic system since:  	1) It will not handle all outline fonts properly (it is not a simple 		matter to connect the outer outline to the inner outline for 		some fancy fonts). 	2) It does not properly handle the even/odd or non-winding rules.  From my research over the years the proper solution is to use a trapezoid decomposition algorithm to scan convert the outlines into trapezoids (as is done by the Postscript and TrueType font rasterizers). These trapezoidal polygons can then be easily and properly rendered by the 3D scanline renderer.  My question is: are there any better solutions to turning the outlines into polgyons other than the trapezoid decomposer? I am not fond of this solution since it creates excess number of polygons.  Another question, for those in the know: what is the best algorithm to create bevelled and/or offset curves for font outlines? I have a dozen papers on these subjects but I can't tell which method is the best to implement.  Thanks for any pointers.  --> Rob Lansdale
It was brought to my attention that there was an oversight in the SIGKids Research Showcase Call for Participation and Entry Form.  Please note that the SIGKids Research Showcase is part of  SIGGRAPH '93, August 1-6, 1993 Anaheim, California.  Thank you,  Diane Schwartz SIGKids Committee Member Institute for the Learning Sciences 1890 Maple Avenue, Suite 150 Evanston, Illinois 60201
Hi all! 	I've just recently become seriously hooked on POV, but there are a few thing that I want to do that POV won't do (penumbral shadows, dispersion etc.). I was just wondering: what other shareware/freeware raytracers are out there, and what can they do? I've heard of Vivid and Polyray and  Rayshade and so on, but I'd rather no wade through several hundred pages of  manual for each trying to work out what their capabilities are. Can anyone help? A comparison of tracing speed between each program would also be  mucho useful. 											Mark.  ------------------------------------------------------------------------------- Mark Mackey                 | Life is a terminal disease and oxygen is          mmackey@aqueous.ml.csiro.au | addictive. Are _you_ hooked?
Hi !!! This is the response for Wayne Michael...and certainly for other-one :-)   I'm sorry for...      1)  The late of the answer but I couldn't find xv221 for msdos 'cause  	I forgot the address...but I've retrieve it..      2)  Posting this answer here in comp.graphics 'cause I can't use e-mail, 	not yet....     2) My bad english 'cause I'm a Swiss and my language is french....   After a long time I retrieve the address where you can find XV for Dos...  	Site	: omnigate.clarkson.edu 	Aliases	: grape.ecs.clarkson.edu 	Number	: 128.153.4.2  	/pub/msdos/djgpp/pub  	it's xv221.zip (?) I think...   Certainly you read the other answer from Kevin Martin... He write about DV/X  (?).       What is it ?????? Could Someone answer ???? 	 	Thanx in advance....   --  --------------------------------------------------------------------- *								    * *  Pascal PERRET     		|	perret@eicn.etna.ch         * *  Ecole d'ingénieur ETS	|	(Not Available at this time)* *  2400 Le LOCLE		|				    * *  Suisse 							    * *		     !!!! Enjoy COMPUTER !!!!			    * *								    *
In article <1993Apr28.094739.25200@htsa.aha.nl> remcoha@htsa.aha.nl (Remco Hartog) writes: >I have a little question: > >I need to convert RGB-coded (Red-Green-Blue) colors into HVS-coded >(Hue-Value-Saturnation) colors. Does anyone know which formulas to >use?  I have a little answer:  See Foley, van Dam, Feiner, and Hughes, _Computer Graphics: Principles and Practice, Second Edition_.  [If people would *read* this book, 75 percent of the questions in this froup would disappear overnight...]  							spl
I was recently talking to a possible employer ( mine! :-) ) and he made a reference to a 48-bit graphics computer/image processing system.  I seem to remember it being called IMAGE or something akin to that.  Anyway, he claimed it had 48-bit color + a 12-bit alpha channel.  That's 60 bits of info--what could that possibly be for?  Specifically the 48-bit color?  That's 280 trillion colors, many more than the human eye can resolve.  Is this an anti-aliasing thing?  Or is this just some magic number to make it work better with a certain processor.  	Also, to settle a bet with my roommate, what are SGI's flagship products?  I know of Iris, Indigo, and Crimson, but what are the other ones, and which is their top-of-the-line? (sadly, I have access to none of them.  Just a DEC 5000/25.  Sigh.)
Hi,  	I have a problem, I hope some of the 'gurus' can help me solve.  	Background of the problem: 	I have a rectangular mesh in the uv domain, i.e  the mesh is a  	mapping of a 3d Bezier patch into 2d. The area in this domain 	which is inside a trimming loop had to be rendered. The trimming 	loop is a set of 2d Bezier curve segments. 	For the sake of notation: the mesh is made up of cells.  	My problem is this : 	The trimming area has to be split up into individual smaller 	cells bounded by the trimming curve segments. If a cell 	is wholly inside the area...then it is output as a whole , 	else it is trivially rejected.   	Does any body know how thiss can be done, or is there any algo.  	somewhere for doing this.  	Any help would be appreciated.  	Thanks,  	Ani.
I have a 512k VRAM chip for sale. Worked fine in my LCII and will give 256 colors on 640 x 480 size screen. Asking $50. I'll cover postage. Speaking of which, does anyone know what the best way to send a chip is. I have a plastic antistatic sleeve, but what's the best way to send it? In an envelope? First class? All info appreciated.
Forgive me if this has been asked before... but here goes:  My friend recently purchased a LC III and he wants to know if there is such a demon called NuBus adapter for his PDS slot? CompUsa and ComputerCity Supercenter says they don't carry them.  Does this mean LC III is incapable of carrying a NuBus board?
From article <C5wDMK.Jrn@hawk.cs.ukans.edu>, by 3s737abg@hawk.cs.ukans.edu (Unknown Class User): >  > I think the subject title says it all. Anybody that relies on a SCSI dick > for stoarage is a pain in the ass!! >  >  Saying things like that incline one to believe that you can't get it (SCSI) to work for your setup (too bad). I've daisy-chained 4 SCSI devices off my mac without a problem (limit is 7 SCSI devices in the daisy-chain). If it isn't working for you, it's really better to state the problem (unless all you really intend to do is try to get nasty e-mail, in that case perhaps you would be better off posting to alt.masochistic type of newsgroup).   /`-_                   callan@csd4.csd.uwm.edu  {     }/ Joel E Callan             Hey, why do you think I have the answer?   \   ./  2909 N. 44th Street         May you sit on the tack of success    |___|  Milwaukee, WI  53210        and rise to the occasion!
I just bought a select 300 and rushed home to print  some grayscale pictures for my kids, when I discovered that grayscale(and photograde) are not available if you are using an SE...even if you are running with an '030 cpu. You won't see this in the printer's docs, and the Apple rep didn't mention it to our users group either. It seems that SE ROMs won't support those "features". Okay, I  guess I should have somehow known that this was the case. Let the buyer beware, huh Apple? 	Be that as it may, I have been thinking about the  problem and I'm puzzled. Why  can't a defencieny in the  ROM be made up for in software. I write software for a living (on unix platforms) and I don't understand the "it just can't be done" responses I've gotten from those I have asked so far.  Isn't Mode32, or somesuch piece of  soft- ware, just such a fix.  	Anyway, I was hoping someone knowledgeable about Mac internals could set me straight: is it simply impossible for a mac SE to print grayscale, or could someone armed with enough info and a little pro- gramming experience cook something up that would supplement the ROM's capabilities? 	Also, how does one know if one's mac can support the grayscale and photograde that the Select 300 is supposedly capable of? ( Short of buying the printer and trying it out like I did) 	Thanks for your help.
We are having a problem with a Quadra 950 that has stumped a couple of techs sent to us by the vendor, as well as us :-) This Quadra is 'stuffed' with 64Mb RAM, 2Mb VRAM and some large disk (400Mb I think). What happens is that after a certain variable interval of time the video circuitry 'loses' vertical sync. It is quite apparent that the Mac CPU is still ok, and the problem really seems to lie with the video circuitry, since you can still save your documents, quit your aplpications, even pull down menus etc. (only the display is scrolling lik crazy, so it's pretty hard to hit menu items ;-) We had the original logic board replaced twice now, and the same problem has been occurring on all boards although the inteval between occurrences has varied. The first board had this problem every about 1hr, more often if the cache was turned OFF (yes OFF).  This is the only symptom that is not obviously related to the video circuitry (after all the cache is on the CPU right?). The second board had the problem every about 10 minutes (we did not keep it, rather we put the original back), the current board we have has this problem a lot less often (has gone about a week without doing it, but did it twice within an hour yesterday). The technicians that have come out to try to figure it out seemed pretty sharp and tried a number of sensible things (most of which we had previously tried ourselves anyway). These included: -swapping the RAM -swapping the VRAM -swapping monitors (3 different 13" Apple RGB and 2 16" Apple RGB) -swapping cables -disconnecting HD and booting from floppy -sacrificing various small mammals Here are some other facts: -when we put a RasterOps ProColor 32 on the NuBus, the problem is fixed  (it does not occur with the internal video or the ProColor video out) -the vendor cannot reproduce the problem back in their shop on the boards  that exhibit it in our lab -Apple is said to be getting a little bit pissed off at shipping us boards  that they cannot find anything wrong with, and getting them shipped back as  faulty according to us. Here are some speculations: -I bet that neither Apple nor the vendor has tested these boards with that  much RAM and VRAM on them simultaneaously, which may have something to do  with their finding it hard to reproduce the problem (though we can  reproduce it with just 4Mb of RAM, so this is probably a red herring). -the vendor's representative blames 'metal in your walls' - claims that our  walls have metal in them which interferes with the Mac's operation. We  have another 950 in the lab which works like a charm (though it's not in  the exact same spot....) Please don't tell me this is probably it, I do  not want to believe it. -it's probably not poltergeists, since they do not have badges to get past  security at the entrance to our site.  Has anyone any ideas? Please? Please email as well as posting cause I seem to be spending a lot of time rebooting my mac lately and have a lot less time available to read news! :-) Thank you in advance. Carlo Tiana NASA Ames Research Center carlo@vision.arc.nasa.gov
<stuff deleted>   > Also, I am not interested in Quicktime.  I would merely like to > use my Mac as a television from time to time.  I have a nice > Sony 1430 monitor, and I would like to use it as a second TV > when my wife is watching sitcoms on our regular TV.   >  					<other stuff deleted>  Wouldn't it be cheaper to just buy a little fourteen inch colour tv? Just  curious...  >  > George Micahels     --
In article <bauer-060493101758@134.60.68.23>, bauer@informatik.uni-ulm.de (Christian Bauer) writes: > In article <Afi9sHS00VohMrYlEe@andrew.cmu.edu>, "Donpaul C. Stephens" > <deathbird+@CMU.EDU> wrote: > >  > > What is the difference? > > I want a double-spin CD-ROM drive by May > >  > > looking into NEC and Apple, doublespins only > > what is the best? >  > Nec Toshiba and Sony (Apple) nearly deliver the same speed. > As apples prices are very low (compared to there RAM SIMMS) > You should buy what is inexpencive. But think of Driver revisions. > It is easier to get driver kits from Apple than from every other > manufacturer >  > Christian Bauer >  > bauer@informatik.uni-ulm.de   	I thought NEC and Toshiba CD-ROM mechanism have an average  access time of less than 200 ms.  While the SONY-APPLE CD-ROM  drive has an access time of 300 ms for the doublespin models.
In article <C508BJ.6E2@imag.fr>, you write: >  > hillman (hillman@plk.af.mil) wrote: > : deathbird+@CMU.EDU (Donpaul C. Stephens) > :  > : kind of slated wouldn't you say?)  Who is going to throw all that to  the  > : side and get the Mac OS for 486???  Not Quite the point to be considdered here! Fact: If/When Apple release system 7 (or what ever is current at the time  of release) then you will see shortly afterwards Apple no longer producing  Hardware...Look at Next with their NextStep486 to see what happens. Who is going to pay Apples Prices when they can get the same thing cheaper  else where! (Heck we can get a Sun Workstation cheaper than a Quadra, and  infact we have a number of times!!!, it ALL comes down to $$$$)  > : If Apple released this before windows 3.0 was released I'd be behind  them, > : they missed the boat.  So why is Apple continued development.  Will it > : support the P5 to its fullest capabilities?  Run faster than Windows?   It > : must do something significantly better than Windows and OS2 to warrent > : being released.   No the continued develeopment is because there is becomming less and less  profit in Hardware, So the Next Step (no pun intended...well sort of), is  to make the money in software (look at Microsoft if you think it can't  happen!), after all you can sell multiple pieces of software to ONE  hardware platform.  As you also said Windows is a nightmare for programmers, so will the  temptation to sell system 7 to a couple of MILLION dos users be too much  for Apple! (50 million copies @ $100 is SERIOUS money!).  --
In the MacUser article on the new centris and quadra machines mentioned that the C650 and the Q800, and not the C610, had ROM accelerated video.  It didn't seem to make much difference in their "benchmark" test.  What is it?  I don't recall seeing it in Dale Adams post.  -Erik Speckman
In article <katinka@FenK.wau.nl> (Katinka van der Linden) writes: } I would like more info on this if anybody has it. Our Exabyte } 8500 tapedrive has never been working from the Quadra 950. } We have been trying it since September 1992, replaced cabling, } inits, I don't know what all. All the "industry experts" we } phoned (the tapedrive dealer, our Apple dealer, the software } dealer) all say it's our fault, or they don't know. The last } thing they said was that we needed a special Quadra SCSI terminator } (???). Anybody know more? Thanks,  In article <1993Apr19.131311.25871@mintaka.lcs.mit.edu>, nodine@lcs.mit.edu (Mark H. Nodine) wrote: >  > In article <C5L39p.2qz@news.udel.edu>, johnston@me.udel.edu (Bill Johnston) writes: > |> In article <1993Apr16.144750.1568@mintaka.lcs.mit.edu> nodine@lcs.mit.edu (Mark H. Nodine) writes: > |> >I don't know about the specific problem mentioned in your > |> >message, but I definitely had SCSI problems between my > |> >Q700 and my venerable Jasmine Megadrive 10 cartridge > |> >drives.  My solution was to get Silverlining.  None of > |> >the loops that involved blind writes worked to the drives; > |> >in fact the only loop that worked was the "Macintosh > |> >Software" loop (whatever that means). > |>  > |> I doubt this is a Quadra-specific problem.  I had to get > |> rid of my "venerable" Bernoulli 20 last year (with enough  > |> cartridges purchased at ~$90 each to make the whole thing  > |> worth more than my whole computer ;).  The tech support guys > |> at Ocean Microsystems suggested that some third-party drivers  > |> might fix the problem - in my case the cartridges wouldn't  > |> format/mount/partition for A/UX.   >  > All I know is that the Megadrives worked perfectly on both my > Mac Plus and my Powerbook 140.  It was for this reason I assumed > the problem had something to do with the Quadra.  Even with the > Quadra, they mostly worked OK.  The problem occurred when I ejected > a cartridge from a drive: it would start popping up dialog boxes > saying "This cartridge must be formatted with Jasmine Driveware" > even though there was no cartridge in the drive. >  > 	--Mark  I have been using the PLI (SONY) 3.5" MO drive and now a Sharp color scanner using standard SCSI cables and STANDARD $20 terminator on my Q700.  No problems.  If you were using a IIfx, that might be another story.  Make sure there is only one terminator in the cabling and it must be at the end.  Some boxes have internal terminators; some can be switched out and others are socketted.  These count.  If the box with internal terminations cannot be put on the end to terminate the cabling, they have to be disabled, ie, switched out or pulled out of their sockets.  If you have 2 boxes with internal terminations, the terminations in one box has to be disabled...., etc.  I am sure that this has been covered by the "experts".  My experience with SCSI boxes that connect to the Mac indicates that they must have some software package for the Mac to 'talk' to them.  My PLI MO drive and Sharp scanner has one for each.  Good luck.
In article <1993Apr1.054820.3942@siemens.co.at> Kurt Netzer, kurt@siemens.co.at writes: >Is it possible to install a 2nd 3 1/2" 100 MB HD in a Mac II with a >5 1/4" 40 MB Qunatum HD? >Can i us a 50 pin cable with 3 connectors for the internal motherboard >SCSI-Connector and the 2 SCSI-HD Connectors. The first HD is'nt terminated >the second will be. >Whats about the power supply. Where can i connect a 3 1/2" AMP-Connector >to supply my 3 1/2" HD?  It is very possible to connect another internal hard disk in any macintosh if you can find the space to put it. I have a IIsi that came with a Quantum 80 meg drive. When I ran into space problems, I slapped in another 40 meg quantum that I had sitting on a shelf. Here is what I did.   First off, I was concerned about space. Since both drives are Quantum quarter height drives, I finally decided that the logical place for them was stacked one upon the other. Fine, they fit snugly. (I have not had a problem with heat yet, and these drives have been running together for over two months.  The next problem was connecting the drive. If you have a spare internal hard disk power cable as I did, then half of your troubles are over. just splice in the extra cable so that you get one square motherboard connector and two hard disk power connectors. If you don't have a spare cable, you will have to buy the wires and connectors which can be found in any good electronics store for about $10. I would suggest properly soldering/heatshrinking the connections to reduce the possibility of shorts or bad connections.  Next, you need a ribbon cable connection. Again, I had a spare hard disk ribbon cable, and I wanted to be careful in case this didn't word so what I did was purchase a crimp on 50 pin cable connector that gave me another male connector in the middle of my spare cable. The part cost $10 again, and is easily attached with any good wood vice. The theory behind using a crimp on connector is that if this doesn't work, my original cable is not damaged, and I can go back to the original setup.  Having done all that, I couldn't be bothered to check the dev notes for power consumption so I plugged it in and it works like a charm to this day.   In a mac II, everything should work the same. Be careful with the ID's of the drive, and ensure that the terminating resistors on both drives are intact. I did not try this without the terminating resistors but it seemed logical that if I am splitting the SCSI chain, that the signal should be terminated at all the ends.  Let me know if you have any more questions.
Wanted:  	Digidesgn Audiomedia Card for the Mac 	Email if you have one for sale.  Thanks
D> I am going to purchase a Modem with a S/R FAX capability. Currently I   D> am considering Suprav.32bis or Global Village Teleport-Gold.  D>    D> The Global Village averages about $100 more, is there an advantage?  D>    D> Concerning FAX:  Do I need to be present when there are incoming FAX   D> i.e., will the modem software recognize an incoming FAX and store the   D> information. Once received, can I use Mac applications on the image.  D>    My telephone line seems pretty stable and I have the Supra as well.  Works  great but with every passing day I fall behind on how many great 14.4s are  out.  Zoom is out of the question from what I'm hearing.  AT&T has a great  product from what I hear and the Sportster is really cheap now too.  If you want to receive a fax, your computer will have to be on, but not  the monitor and of course the modem.  You can set the number of rings that  will receive the fax on a specific ring you set with Fax STF software.   It's entirely up to you how to arrange that.  I've had faxes sent to me  which is great but I've been home to set it.  I don't have a need to set  fax receiving up all day.  Also I hear there is a device that can channel  all incoming phone signals for about $70.  Rumor also that the phone  company can hook you up with the same gizmo for about $5 if that's what  you need.  Best of luck and write back if you'd like more feedback.   * Freddie 1.2.5 * Clinton:  The Tax Man Cometh & Cometh & Cometh & keeps on coming
Hi there!  What is your recommendation for a good hard-disk driver software for non-Apple drives? I would mainly need it for a SyQuest removable media drive, but maybe for some normal drives too. I have heard and seen good things about SilverLining, but don't know any competitors. It does not need to be fancy, filled with features... I more like it affordable.  Thanks