Re: Side views through MCO

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Adam Neale (adam.n++at++seos.co.uk)
Tue, 29 Jul 1997 16:37:36 +0100

----------
> From: Ren-Jye Yu <renjye++at++python.tamu.edu>
> To: info-performer++at++sgi.com
> Cc: drobbins++at++python.tamu.edu; renjye++at++python.tamu.edu
> Subject: Side views through MCO
> Date: 28 July 1997 23:55
>
> We are using three projectors to project our flight simulation onto three
> separate screens ,all having the same aspect ratio. Our MCO is set to
> 1280x1024 center screen resolution, and 640x480 left and right screen
> resolution.
>
> We are unable to make the center screen edge match the side screen edge.
In
> other words, center view and left or right view edges do not line up.
>
> 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.

Are the screens configured with the same angular offset as the frustum ?
(i.e. 45 degrees).
For this system to be edge-matched and geometrically correct the screen
segments
should subtend the same angle from the Design-Eye-Point as the viewing
frustum from Performer.
  
> 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?
>
>
> Any ideas?
>
>
>
> --
>
>
____________________________________________________________________________

__
>
> ("`-''-/").___..--''"`-._ Ren-Jye Yu
> `6_ 6 ) `-. ( ).`-.__.`) Email :renjye++at++python.tamu.edu
   
> (_Y_.)' ._ ) `._ `. ``-..-' Phone(O) :(409) 845-0729
> _..`--'_..-_/ /--'_.' ,' (H) :(409) 691-8570
> (il),-'' (li),' ((!.-' Address :Aerospace Engineering Department
> H.R. Bright Building
> Texas A&M University
> College Station 77840-3141
>
____________________________________________________________________________

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