Tom Hyndman

Element Sketchpad

Element Sketchpad is a purely Euclidean interactive notebook with coloring, animation, and sound as first-class citizens alongside compass and straightedge constructions. Create animations, play games with your friends, or work through all of mathematics starting with Euclid’s Proposition 1.1 … in a world with no numbers and no coordinates and no words. Where touchpad users, AI agents, and Element Scheme scripts emitting the Construction Calculus all interact as purely geometric entities.

Element Sketchpad showing Euclid’s Proposition 1.1, the equilateral triangle construction

[Placeholder page. A fuller write-up — and links out to the GitHub repo and the video — are coming.]