center of projection

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From: DAVID Philippe (philippe.david++at++sncf.fr)
Date: 04/05/2001 01:04:24


hello pfUser

I use performer for a Virtual Reality application where the user is on
front of a big screen (2m x 3m). His head is tracked by an ascension'
tracker.
So I move the point of view function of the head position behind the
screen. I rotate the point of view to keep the same frustrum and I adapt
the FOV too. but I need to change the projection in order to keep the
center in front of the user.
Have you any idea of how to change this.
It must be down by changing the projection matrix but I don't know how.

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Philippe DAVID
SNCF- Direction de la Recherche et de la Technologie (DRT)
Unité Nouvelles Technologies de l'Information et de la Communication
(TIC)
45, rue de Londres
75379 PARIS cedex 08 (interne : CRT Paris Saint Lazare)
Tél : 01 53 42 93 09 (interne : 31 93 09)
Fax : 01 53 42 93 14 (interne : 31 93 14)
Mél : philippe.david++at++sncf.fr
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