Project Tango doesn't just use a camera to track position, it uses structured light - like the first kinect - with an infrared projector and camera to build up

Project Tango doesn't just use a camera to track position, it uses structured light - like the first kinect - with an infrared projector and camera to build up a 3D model of the environment. https://www.ifixit.com/Teardown/Project+Tango+Teardown/23835 https://www.ifixit.com/Teardown/Project+Tango+Teardown/23835