Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Tue, 29 Jul 1997 01:00:00 -0700
> We ran without the MCO (to the monitor) and the edges matched but as we
rolled
> the horizon did not remain parallel across both screens. The right view had
a
> larger roll angle than the center view.
>
> Within Performer, we set each chan to have a horizontal FOV of 45 degrees and
a
> default vertical FOV. We set the side channels to have a 45 degree
horizontal
> offset.
>
> We tried playing with the FOV and offset to make the views match but
shouldn't
> Performer align the views as long as the FOV are the same for each channel
and
> the offsets are correct?
>
Performer can't read your mind, if the pixel aspect is the same then
you'll get lucky, but with any projection system you should set hvof
& vfov explicitly to match your physical display as viewed from the
design eyepoint.
You need to think about your display GEOMETRY in relation to your
frustum GEOMETRY.
Don't expect things to work sitting three monitors side by side if you
use channel heading offsets. The geometry of the display is just wrong,
you'd have to rotate the monitors to face a common viewing position in
the middle and stick your head there for viewing.
What is the geometry of your display surface like?
Cheers,Angus.
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