[comp.archives] [sci.virtual-worlds] Re: 3D glasses for Macintosh

jmunkki@hila.hut.fi (Juri Munkki) (11/28/90)

Archive-name: sega3d/25-Nov-90
Original-posting-by: jmunkki@hila.hut.fi (Juri Munkki)
Original-subject: Re: 3D glasses for Macintosh
Archive-site: vega.hut.fi [130.233.200.42]
Archive-directory: /pub/mac/finnish/sega3d
Reposted-by: emv@ox.com (Edward Vielmetti)


In article <11579@milton.u.washington.edu> bkuo@girtab.usc.edu (Benjamin Kuo) wr
ites:
>In the same line, has anyone had any success with the schematics/docs about
>hooking up the Nintendo 3D vision glasses that floated out on the net
>about a half a year ago?

I don't know about Nintendo (I haven't seen anything that would even
indicate that Nintendo has 3D glasses), but for Sega 3D glasses, you
can find documentation, schematics, source code and binaries from
vega.hut.fi in the /ftp/pub/mac/finnish/sega3d directory. Remember
to use binary mode.

>I imagine you could get quite impressive 3D action by defining
>two screens for each eye and manually do animation in a program (I believe
>John Calhoun, the programmer of the Mac games Glypha, Pararena, and Glider
>also did a one-screen 3D game...).

You can do impressive things with these glasses, but it requires some
careful timing and screen switching. The demos source code for the 3D
glasses doesn't assume that the machine has multiple hardware frame
buffers and uses copybits to do the changes in the display. Of course
this affects the performance of the machine.

>It seems that this should be an "easy" addition to the Mac, since all it
>involves is a bit of wiring and software. Even just playing with blue/red
>glasses and a Mac II (w/Videoworks) significantly makes for a more "real"
>environment.

The Macintosh is not well suited for stereo animation, if you want to
use a classic-style Macintosh (only two buffers) or if you want more
than four colors from an 8 bit video card. Even with the 8 bit video
card, you have to know how to access the video drivers directly and
for that you need to read the "Designing Cards and Drivers..." book.

>We had the idea of a "3D Finder", where alternate screens would shift
>certain images the proper pixels/colors to achieve 3D windows, maybe a
>3D mouse (left-right, up-down, back-forth).

Go ahead, if you can do it, but it's not trivial.

>Also, if anyone has the complete text to those schematics/etc. could they
>please mail me? Thanks.

If you really need mail and can not use ftp, mail me and I'll mail you
the files.

   ____________________________________________________________________________
  / Juri Munkki     /  Helsinki University of Technology   /  Wind  / Project /
 / jmunkki@hut.fi  /  Computing Center Macintosh Support  /  Surf  /  STORM  /
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~