Jason (jcreed) wrote,

Here's a nice easy way to get natural-looking coastline shapes:

It's just alternating two steps:
(1) set the value of each pixel to the median value of a short random walk from the current point
(2) zoom in a little

Plus a little fine-tuning that adds some random black pixels if the center of the image has too many white pixels, and vice-versa, so the image stays "interesting" as it continues to zoom in.
Tags: javascript, maps

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