Hi Gianluca,

On Tue, May 31, 2011 at 10:58 AM, Gianluca Natale
<[email protected]> wrote:
> The front and back clipping planes are updated by OSG during the cull 
> traversal,
> based upon the bounding volumes of all the objects in the scene.
> What happens if the farthest object (WRT the eye position) in the scene is 
> out of the viewing volume?
> Is it still taken into count to determine the far clipping plane, or is it 
> excluded since out
> of the frustum?
>
> Same question for the nearest object. If out the viewing volume, is it 
> ignored for computing the near clipping plane?

If the a drawables bounding box intersections with the view frustum
then it will be treated as though the whole object intersections and
the computation of the near/far planes will use it whole extents.
Drawables that a completely outside the view frustum will be culled
and won't take any part in the computation of the near/far planes.

Robert.
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