PoolLiveAid shows the trajectory of the billiard ball

Quantum Leap , s02e18 - Pool Hall Blues

Want to feel like a professional billiards player, but you can't play at all? The PoolLiveAid system developed at the University of the Algarve (Portugal) will provide you with this opportunity. The cameras mounted above the table read the position of the cue and the ball, then the potential trajectory is calculated, which is projected onto the table. Moreover, all this in real time!

In general, see for yourself:
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And an explanation (there are English subtitles):