[osg-users] Boundingsphere precision question

[Ariasgore]

Hello,

> The bounding spheres in OSG are used as loose bounds to be able to quickly 
> do frustum culling. If you need tight bounds you should be able to use the 
> getBoundingBox() method on the Geode's of interest. This method returns a 
> bounding box that should tightly fit around the geometry data (I haven't 
> checked this, merely assuming it is a tight fit based on the geometry's 
> vertices).

I created a NodeVisitor and traversed the loaded node, the boundingbox I 
received from the Geode is indeed smaller, but it confused me a little bit, 
since it looks like the attached picture -> 
http://img225.imageshack.us/img225/3594/tankspherexgk9.gif
So obviously there are several geode in the model, but is there a quick way 
to get the "overall" geode? I tried to traverse all geodes and saving the 
geode with the biggest boundingbox radius, but then I get the center of the 
last goede's center, which is seldomly the center of the model.


Thanks