A couple of students from the University of Algarve in Portugal designed PoolLiveAid, a projector that creates real-time light predictions of billiard shots.
According to Mashable, PoolLiveAid hangs above the pool table and analyzes the position of the ball and the angle in which the cue stick is held to predict where the shot will go. The projector then shines the predicted line onto the table. (See demonstration video below.)
Ricardo Alves and Luis Sousa, electronic engineering students at the university, designed the device as a final project for one of their classes.
The students will present their design at the 21st International Conference on Computer Graphics, Visualization and Computer Vision 2013 in the Czech Republic next month.