Bounding boxes (for compound objects)

Is there any one-step way to get a bounding box for a hierarchy of objects?
The best method we could come up with is going through the bb's of each object in the hierarchy and keeping track of the outermost surfaces, then creating a bb from those, but that's kind of tedious. It's also not immediately clear to me how one would align the centers of the bb and the objects.

 

If you're going to cycle through the hierarchy then you could calculate the max and min corner as you go along.

That'd give you the two most extreme corners in all child bounding boxes and based on these co-ordinates you can calculate the box.

 

You could use this, starting with one bounding box, and doing Expand() until you have the final bounding box:

http://unity3d.com/support/documentation/ScriptReference/Bounds.html

d.