Hi Nathan,
For active stereo with shutter glasses, if you use the merged image then it
will not work. Active stereo works on the principle that scene is rendered
at min 120 Hz and each alternate frame is for the left eye and right eye.
the shutter glasses are in sync in the 3D moniter so that each frame is
either seen by the left eye of right eye. if you see without the shutter
glasses then you will see the merged images. but if you merge the right and
left frames before and then display the scene then you will still see the
merged images with the shutter glasses but not the 3D effect as both eyes
will see the same image.

-Nishant

On Fri, Jan 29, 2010 at 3:27 PM, Nathan Schofield <
[email protected]> wrote:

> I thought that if the image looked the same as that on screen i.e. with the
> offset and two images merged together, displaying this on a 3D monitor with
> shutter glasses would produce the same effect as displaying it via software,
> maybe I was wrong.
>
> As for capturing the image I tried setting glReadBuffer to GL_BACK_LEFT
> then capturing one image, changing glReadBuffer to GL_BACK_RIGHT capturing
> the second image, and using copySubImage to combine the two. However the
> second image from GL_BACK_RIGHT is always black.
>
> Cheers,
> Nathan
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=23403#23403
>
>
>
>
>
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