Version: 2017.1 (switch to 2017.2b)
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.


Suggest a change


Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.


Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.



public delegate SurfaceChangedDelegate(surfaceId: VR.WSA.SurfaceId, changeType: VR.WSA.SurfaceChange, bounds: Bounds, updateTime: DateTime): void;
public delegate void SurfaceChangedDelegate(VR.WSA.SurfaceId surfaceId, VR.WSA.SurfaceChange changeType, Bounds bounds, DateTime updateTime);


surfaceId The ID of the surface that has changed.
changeType The type of change this event represents (Added, Updated, Removed).
bounds The bounds of the surface as reported by the device.
updateTime The update time of the surface as reported by the device.


The SurfaceChanged delegate handles SurfaceChanged events as generated by calling Update on a SurfaceObserver. Applications can use the bounds, changeType, and updateTime to selectively generate mesh data for the set of known surfaces.