From Valve Developer Community
Revision as of 00:50, 14 March 2011 by Thelonesoldier (Undo revision 146337 by Thelonesoldier (Talk))
Creates an axis-aligned bounding box used by the AI to detect collisions with the world, mostly for movement purposes.
This is also called the hull.
$bbox (min x) (min y) (min z) (max x) (max y) (max z)