[osg-users] osgViewer Custom Graphics Operations

[Argentieri, John-P63223]

Robert/OSG,

What is the plan for OSG to grant us the ability to insert custom
graphics operations in a controlled order? What I mean is, what if we
want to process our own application-level callbacks immediately after
makeCurrent() and immediately before swapBuffers() using
osgViewer::CompositeViewer?

There are too many things that we can't do using
osgViewer::CompositeViewer and Camera/Cull callbacks.

osgViewer::CompositeViewer doesn't permit us to do image->readPixels in
order to do a screen capture. I've read all your advice on the topic in
this forum. It just doesn't work.

We have to roll our own render loop to the point that I never even call
renderTraversals(). I made my own method that substitutes that method.
Of course, I don't have access to the barriers, so my viewer must be
single threaded.

John Argentieri
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