Hi HN and สวัสดีครับ! I remember seeing this the first time in Vienna by a friend of mine, Michi who came back from NYC and I believe he learned about it at the local hacker space at the time: NYC resistor. I knew Michi through the Metalab, our hacker space in Vienna. Originally the idea seems to have been from the Graffiti Research Lab, which is also what I've linked to on my page and in the repo's Readme. I think t…
Here's a video [0] of Bre Pettis talking with Michi about Laser Tagging from the Graffiti Research Lab in Austria [1].
And the app by Michi and oneup (my other YC cofounder!) was written in Processing.
[0] https://youtu.be/isfrCIhQ5HE [1] https://graffitiresearchlab.at