X3DEnvironmentalSensorNode : X3DSensorNode {
  SFVec3f [in,out] center    0 0 0 (-Inf,Inf)
  SFVec3f [in,out] size      0 0 0 (-Inf,Inf)
  SFTime  [out]    enterTime
  SFTime  [out]    exitTime
}

ProximitySensor : X3DEnvironmentalSensorNode {
  SFVec3f    [out]    centerOfRotation_changed
  SFRotation [out]    orientation_changed
  SFVec3f    [out]    position_changed
}

TransformSensor : X3DEnvironmentalSensorNode {
  SFNode     [in,out] targetObject        NULL  [X3DGroupingNode|X3DShapeNode]
  SFRotation [out]    orientation_changed
  SFVec3f    [out]    position_changed
}

VisibilitySensor : X3DEnvironmentalSensorNode {
}

