spheresensor

SphereSensor {
  exposedField SFBool     autoOffset        TRUE
  exposedField SFBool     enabled           TRUE
  exposedField SFRotation offset            0 1 0 0
  eventOut     SFBool     isActive
  eventOut     SFRotation rotation_changed
  eventOut     SFVec3f    trackPoint_changed
}

• Used for rotating an object freely
• Geometry does not have to be spherical
• offset field used to keep track of last drag effect
• autoOffset field set to FALSE means geometry jumps to initial postion each new drag event

Example