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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