Hi there, I hope someone of you can help me on this issue. I have a very complicated scene graph, that takes a very long time to be completely redrawn (>200 ms).
But the most frequent use case I have is to redraw only a very small part of the model at a time (suppose for example that I would need to redraw only the object under the mouse). So, I could increase performances a lot by simply redrawing that object in the front buffer without clearing the depth buffer, in order to keep it in the right position WRT the other object of the model. And without swapping front and back buffers at the end of drawing. Is this possible? If I'm not wrong, sometimes ago I received an email from you saying that the drawing traversal of OSG always clean the depth and back buffers, redraws the complete scene graph and then swap the buffers. This works pretty well when the scene changes dynamically, but in my case where there is a static drawing for a long time, I would need a way to tell the drawing traversal to draw in the front buffer, and not to perform the swapping of buffers at the end. Is there a way to do that? Thanks in advance Gianluca Natale
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