Re: Large FOV

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Angus Dorbie (dorbie++at++sgi.com)
Mon, 14 Jun 1999 13:04:57 -0700

Devrim Erdem wrote:
>
> Hi,
>
> I have to determine the number of channels to draw a 130 degrees hor. FOV
> view. Is there a math model to compute the distortion caused by rendering
> large FOV to a channel ?

There is no distortion for the correct display system. See my
presentation in the whitepapers section of the performer web pages.

The image when displayed on a rectangular screen and viewed from the
correct vantage point will reproduce the virtual environment as oriented
with the modelview matrix.

Problems arise when you try and do something else, like display the
image on a cylindrical screen.

Look through this presentation:

http://www.sgi.com/software/performer/presentations/geometry/index.htm

Sorry that it suffers from few words, it really needs my voiceover, but
I hope there's enough there to push you in the right direction.

If not please repost with a description of your display.

Cheers,Angus.

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