Titania X3D Editor

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Titania v4.6.10

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X3D Reference



VisibilitySensor detects when user can see a specific object or region as they navigate the world. The region sensed for visibility to the user is bounded by a rectangular box.

The VisibilitySensor node belongs to the EnvironmentalSensor component and its container field is children. It is available since X3D version 3.0 or later.



SFNode [in, out] metadata NULL [X3DMetadataObject]

Metadata are not part of the X3D world and not interpreted by the X3D browser, but they can be accessed via the ECMAScript interface.

SFBool [in, out] enabled TRUE

Enables/disables node operation.

SFVec3f [in, out] size 0 0 0 [0,∞)

Size of visibility box, measured from center in meters.

SFVec3f [in, out] center 0 0 0 (-∞,∞)

Translation offset from origin of local coordinate system.

SFTime [out] enterTime

Time event generated when user's camera enters visibility region for sensor.

SFTime [out] exitTime

Time event generated when user's camera exits visibility region for sensor.

SFBool [out] isActive

IsActive true/false events are sent when triggering the sensor. isActive=true when entering visibility region, isActive=false when exiting visibility region.



  • Often used to attract user attention or improve performance.
  • This sensor detects user interactions affecting peer nodes and their child geometry.


screenshot VisibilitySensor

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