Re: OGL View Matrix --> pfChan view matrix

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Angus Dorbie (dorbie++at++sgi.com)
Thu, 11 Jun 1998 13:57:09 -0700

Allen wrote:
>
> I have an OpenGL view matrix (no projection information, just positions
> the camera), and I would like to convert it directly into the equivalent
> Performer matrix so that I can use it in a pfChannel::setViewMat call.
>
> I thought this would be rather straight forward, but I have not been
> able to find a solution yet. Has anyone every done this?

Yes,

you need to invert the matrix, premultiply by a 90 degree rotation
around x and post multiply by the opposite rotation.

Voilla.

Cheers,Angus.

-- 
"Only the mediocre are always at their best." -- Jean Giraudoux 


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