// Bounds extents functions // give the extent of the object's bounding box #declare Obj = sphere { 0, 1 } #declare Min = min_extent (Obj); #declare Max = max_extent (Obj); // i.e.: #declare Center = 0.5*(min_extent (Obj) + max_extent (Obj)); #declare Length_X = (max_extent(Obj).x - min_extent (Obj).x);