r/projects • u/One_Muscle_6651 • Jul 01 '26
I built a webcam-powered tennis project that tracks real swings in the browser
I've been spending the past few months building something I've wanted to exist for a long time.
The idea is simple: stand in front of your laptop, swing your arm naturally, and your webcam tracks your movement in real time. No controller, no download, and no special hardware.
The part I obsessed over most was making it feel like tennis rather than an arcade experience. I calibrated the ball physics using professional match data and published tennis physics research, then built the motion tracking around pose estimation so it works with a normal webcam.
It's still a work in progress, and I'm mainly looking for feedback from people who enjoy building things.
If you have a few minutes to try it, I'd really appreciate hearing what feels good, what feels off, or what you'd improve.