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[* black] We can't help but experience a little ''[guide|60612|déjà vu|stepid=126454|new_window=true]'' as we unmask our latest subject.
[* black] Pulling back the outer shell on the Vive reveals a number of sensors—32 in total, according to HTC.
[* black] These photodiodes take in IR light from the two LighthousesLighthouse base stations as they flash and sweep light across the room. This enables a connected PC to [https://www.youtube.com/watch?v=J54dotTt7k0|calculate the headset's position|new_window=true] and orientation in space as a function of the time between receiving the flash and the following IR laser sweep.
[* black] These photodiodes take in IR light from the two LighthousesLighthouse base stations as they flash and sweep light across the room. This enables a connected PC to [https://www.youtube.com/watch?v=J54dotTt7k0|calculate the headset's position|new_window=true] and orientation in space as a function of the time between receiving the flash and the following IR laser sweep.
[* icon_note] This method is the exact opposite of the head-tracking technique found in the Oculus Rift. In the Rift, the desk-mounted camera tracked the IR emitters in the headset, whereas in the Vive, the headset sees light from the mounted IR emitters without actually "tracking" its location.