Geometry::BoundingBox<float, 3> bbox;
for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
bbox = bbox|(*i)->get_bounding_box();
Geometry::BoundingBox<float, 3> bbox;
for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
bbox = bbox|(*i)->get_bounding_box();