Hi Daniel,
On Thu, 2005-07-14 at 14:29 +0200, Daniel Grest wrote:
> Hello OpenSG developers,
>
> we are in the need to set a principal point in the perspective camera.
>
> This is usually unneccasry for most graphics applications, but
> when dealing with real images like for augmentation purposes, it is
> usually the case that the optical axis of the real camera is
> not at the middle of the image.
OK, makes sense.
> We were thinking of how it is best to inlcude that in our OpenSG
> framework. At first we thought of switching to the MatrixCamera,
> but the better way is probably to add a setPrincipalPoint(px,py)
> function to the perspective camera. I was really wondering why there
> isn't such a function yet, but probably nobody doing just graphics is
> missing that.
>
> We thought of specifying px and py in normalized device coordinates,
> such that px,py is in [-1,1], if the optical axis is in the image, where
> (0,0) is the default (as it is now).
>
> We would like to extend the current OSGPerspectiveCamera by such a
> function and hope that somebody of the developers is going to evaluate
> the functionality and includes it in the CVS?
Sounds good to me, I would gladly accept it.
> We believe that this functionality may be of interest to other people as
> well.
Yup, I believe that. Many people who do AR would probably like to have
something like that.
Thanks
Dirk
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