SphereSensor { 
      exposedField SFBool     autoOffset        TRUE
      exposedField SFBool     enabled           TRUE
      exposedField SFRotation offset            0 1 0 0  # [-1,1],(-,)
      eventOut     SFBool     isActive
      eventOut     SFRotation rotation_changed
      eventOut     SFVec3f    trackPoint_changed
    }