Life & fun · November 29, 2020
Ghost Seeker
Hide & Seek meets augmented reality
What it does
Play hide & seek in AR with your family and friends. Thanks to the LiDAR sensor in the iPhone 12 pro, you can hide ghosts behind real world objects.
Does the same job
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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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