Hello, i needed a device that calculates X, Y and Z of an object. So, i thought of using a Wiimote(Nintendo). Using that, i can get X and Y, but i cannot problem the "Z" of a single IR source. i found this device: http://www.robokits.co.in/datasheets/gp2y0a02yk.pdf It says here that we can can calculate the Z information. The Wiimote uses built in Image processing to calculate the X and Y of the source and using 2 Wiimotes, its possible to calculate the Z. But this device seemed to be interesting. Can anyone please tell what mechanism this uses?