[osg-users] osgViewer help needed

[Argentieri, John-P63223]

All,

I need to have a callback from within osgViewer::CompositeViewer that
happens just before each graphics context's renderer does cull_draw().
It can't be part of the cull traversal or the camera's pre-draw
traversal, or the update traversal. Single threaded, and right before
the cull traversal. Does anyone know of a way that this can be done
without gutting osgViewer?

Many thanks,
John Argentieri
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