// orientation rotations listed below. This has the effect of the
// eye moving around and "looking at" the object (model) from
// different angles.
+ virtual SGVec3d getOffset_m () const { return _offset_m; }
virtual double getXOffset_m () const { return _offset_m.x(); }
virtual double getYOffset_m () const { return _offset_m.y(); }
virtual double getZOffset_m () const { return _offset_m.z(); }