Hi all,

I am constructing an urban model to visualize a quarter entire, am using data 
base spatial to get the information of the streets, squaresÂ… and each entity 
has an object 3D for its representation. As the object number is great, I only 
load in my graph of scene those objects that are near of the camera. I used the 
osgimpostor example to make my manipulator of the camera, and each movement of 
the camera I consult in the data base the objects that are near of this 
position and the loaded.

Here my problem appears, to each change in the position of the camera I all 
erase the content of mine of the scene graph and later I place all again the 
objects, and believe that is this the reason of mine framerate to fall very.

I would like to know as I make to cross the scene graph to verify which nodes 
must be removed and which must be inserted, not to be necessary to remove all 
and again place them to each movement of the camera.

Thanks,

Ronald S.Serrao,
Brasil.


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