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Ask HN: Most interesting tech you built for just yourself?

1901 points l2silver | 2 comments | 27 Apr 23 15:04 UTC | HN request time: 0.786s | source

Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
1. texuf ◴[28 Apr 23 06:58 UTC] No.35738322[source]▶
I built a website that you can bring up in multiple browser windows, or on multiple adjacent monitors attached to independent computers. Each browser displays a unique QR code. A user can navigate to a second webpage, activate their camera, and point their camera at the QR codes. Each QR code will switch to a unique AR code, then the user can project a single continuous image across all the monitors. It mostly works but I’m missing some 3d math to make the image line up perfect when the angles are weird.
replies(1): >>35751303 #
2. jibbers ◴[29 Apr 23 09:00 UTC] No.35751303[source]▶
This sounds cool. Do you have it online?