khom loi
A free generative art piece — play it in your browser, no install. Khom Loi, Drawn — why a Yi Peng sky lantern rises, how high and long it flies, and where the wind brings it down over Chiang Mai. · โคมลอย วาดด้วยคณิต
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Open the live demo Source on GitHubFrom the README
The Yi Peng sky lantern drawn with the physics of hot air: why it rises, one flight from lighting to landing, where the wind brings forty lanterns down over Chiang Mai, and how many are up at once. English and Thai.
docs/lantern.js — the lantern: ideal-gas lift, fuel burn, heat in and out, drag, wind growing with height. docs/app.js — every drawing on the page. tools/copy_text.py — every word, both languages; tools/build.py writes the pages (--motdang for the motdang.net copy). tools/mapdata.py — cuts water and the runway out of Mot Dang's map (OpenStreetMap contributors, ODbL).
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