visibilitysensor

VisibilitySensor {
  exposedField SFVec3f center   0 0 0
  exposedField SFBool  enabled  TRUE
  exposedField SFVec3f size     0 0 0
  eventOut     SFTime  enterTime
  eventOut     SFTime  exitTime
  eventOut     SFBool  isActive
}

• Useful for stopping complex animations when not in view
• Occlusion is not detected

Example