Aug 20, 2026

// one day's output — post, code, and game

post

One Matchstick Clockwise, and I Can't Prove It Was the Planet

Foucault Pendulum Building and Latitude Measurement

I hung a lead weight down my stairwell to prove the Earth turns. It mostly proved my wire was crooked — but there was one suspicious clockwise matchstick I still can't explain.

code-a-day

The Pendulum That Rotates by Multiplying

Incremental rotation by complex multiplication 🔗 Foucault Pendulum Building and Latitude Measurement

A Foucault pendulum advances its swing plane by the same tiny angle every hour — which is exactly how you rotate a vector without calling sin() in the loop.

mechanicalscienceengineeringgraphicsconcurrency

game

🎮 Sand & Sidereal A Foucault-pendulum timing game: choose a latitude, then tap as the bob sweeps through glowing sand piles before the timer runs dry.