One new function :
osg::BoundingBox computeObjectBBox(osg::ref_ptr<osg::Group> node, osg::BoundingBox bbox); : gives the bounding box of the object attached to the label
One changed function :
void setLabelType(lgType labelType, osg::ref_ptr<LGAnimation> animation); : now correctly functioning
The main shows an external_top label and an external_face one.