Jason Daly wrote:
> 
> Correct.  Also, note that there are four different places to attach 
> Camera::DrawCallbacks (Initial, PreDraw, PostDraw, and Final).  Which 
> one you use will depend on what you're doing in the callback.
> 
> For example, a FinalDrawCallback is a good place to capture the image of 
> what the camera just drew.  This is what the osgscreencapture example 
> demonstrates.
> 

Ok, but what do these 4 types exactly mean?

I guess a PreDraw callback gets called BEFORE the camera renderes and PostDraw 
AFTER the camera has been rendered its subtree. But what means Initial? And 
whats the difference between PostDraw and Final?

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