Old lightguns used CRT monitors to work, and are not compatible with modern systems anymore.
I've com up with an idea and would like to know if it's doable and what problems there could be.
The idea is to stick a Infrared Laser inside the gun, and fit a webcam right underneath the laser.
When you shoot the webcam sees the monitor (brighter than the surrounding) and sees a bright spot from the laser where you shot. With some graphic modules it could straighten the image and calculate where you have shot. With the modern quad-core raspberries it might be powerfull enough to calculate this fast enough and send the coordinates to the console/pc.
Would it be possible?