NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/comp/graphics/8143

Internet Message Format | 1992-07-25 | 1.4 KB

Path: sparky!uunet!portal!cup.portal.com!Chris_F_Chiesa
From: [e-mail]
Newsgroups: comp.graphics
Subject: Re: stereoscopic images ?
Message-ID: <[e-mail]>
Date: Sat, 25 Jul 92 06:02:35 PDT
Organization: The Portal System (TM)
References:  <[e-mail]>
Lines: 22

Dirk Sturzebecher ([e-mail]) writes:

>I have a 3D wireframe object dissplayed. I would like to generate a
>stereoscopic image from the wireframe object. What is the correct way of
>doing this ? I can remember something about rotation ?

I assume you mean to render a shaded, solid version of the image, right?
I would think you could get good results by simply emulating the way
stereoscopic perception works "in real life": generate one image, then move
your "eye" ("camera") a little to one side, i.e. perpendicular to the
direction you're "looking" ("aiming the camera") and generate another image.
Two images of the same thing from slightly separated viewpoints => stereo.

If you're just interested in rendering that wireframe itself in stereo,
I've gotten fair results in the past by just doing the standard 2D-to-3D
perspective transform, but adding a "sideways shift" to points based on
their "distance from me."  Render two images with slightly different "sideways
shift" factors and you get a stereo pair.  Keep in mind this is probably
the "poor man's" way of doing this.

Chris Chiesa
  [e-mail]