Tuesday, January 18, 2022

Bouncing Balls, Beautiful Patterns



Here we see a dozen or so physics simulations in which balls are released to bounce around. The astonishing part is the point in the middle of each sequence where the balls arrange themselves in a pattern. That can't really happen, can it? It's really nice to see anyway, and here's how they did it.

Each sequence is obtained by joining two simulations, both starting from the time in which the balls are arranged regularly. One simulates forward in time, one backwards.

(via Kottke)

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