Viewpoint { 
      eventIn      SFBool     set_bind
      exposedField SFFloat    fieldOfView    0.785398  # (0,)
      exposedField SFBool     jump           TRUE
      exposedField SFRotation orientation    0 0 1 0   # [-1,1],(-,)
      exposedField SFVec3f    position       0 0 10    # (-,)
      field        SFString   description    ""
      eventOut     SFTime     bindTime
      eventOut     SFBool     isBound
    }