Hopalong Attractor. An old classic with a new perspective in 3D
In plain words
Hopalong Attractor is a 3D visualization tool that reimagines a mathematical classic. It generates dynamic, interactive fractal patterns based on the Hopalong algorithm, allowing users to explore complex geometric forms from multiple angles. The software is designed for anyone interested in mathematics, generative art, or visual experimentation. It's available as open source on GitHub, making it accessible to both casual explorers and developers who want to understand or modify the underlying code.
written from the facts on this page · September 2026
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
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Launched alongside, March 2026
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AI · Mar 2026 · claude.com
