[osg-users] about drawing only in the front buffer

2011-02-22 Thread Gianluca Natale
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

Re: [osg-users] about drawing only in the front buffer

2011-02-22 Thread Robert Osfield
Hi Gianluca, If you new exactly what objects needed updating then you could compute combined bounding volume of the modified objects in the current and the previous frame and then project these combined bounding volume into screen space to find out the region of the screen that will need to be