Re: Defining point of rotation for pfChanViewOffsets

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Nathaniel Bletter (nat++at++od.sri.com)
Fri, 18 Aug 1995 09:20:39 -0700

On Aug 17, 3:03pm, Bruce Cameron wrote:
> Subject: Defining point of rotation for pfChanViewOffsets
>
> In my stereo viewing application, I use pfChanViewOffsets
> to develop the disparity between the right and left channels.
> While this works well, the rotation occurs at/near the near
> clipping plane (producing an image that is behind the screens).

Are you using a rotation offset between the two channels? This not the correct
way to do stereo pairs as it introduces vertical disparities which wrecks havoc
on your eyes after extended viewing. You should use off-axis projections
created with the pfMakePerspFrust() call, which represents how your eyes are
really positioned relative to the screen. Look at the sfly.c code on
sgigate.sgi.com ftp site for examples.

--


Nat Bletter
SRI International
nat++at++od.sri.com
http://os.sri.com/people/nat/
(415) 859-4358

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