3 ms·
> A photodiode picks up the raster on a CRT based monitor and with appropriate timing logic uses this to decide where to draw pixels Incidentally this is how "
by ZoFreX 14y ago
> A photodiode picks up the raster on a CRT based monitor and with appropriate timing logic uses this to decide where to draw pixels
Incidentally this is how "light guns" worked, and also why they sadly do not work on LCD or plasma screens.
- bonyt 14y agoOnce I made a program that was like duck hunt, except you held a webcam at the screen. When you fired, the screen flashed black with a patch of white where the duck was, the camera took a snapshot and looked for how close to the center of the webcam's frame the white was to decide if you had hit it or not. It worked surprisingly well.
- ZoFreX 14y agoAwesome! I think some light gun games used this method too :)