This one has been sitting in my backlog for a while and its been a while since I’ve gotten to write a programming post¹, but now seems as good time as ever: Twitter puzzle

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Last Thursday I wrote a post about generating Perlin/simplex noise in Racket. Later that day, I posted to the Racket mailing list asking how I could make it faster. What resulted was a whole sequence of responses (primarily about Typed Racket) and a bit of a rabbit hole that I’m still trying to wrap my head around.

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Many games need noise. No, not that noise–this noise. Or better yet, this noise. More seriously, noise in this context refers to psuedo-randomly generated images that can be used for natural looking terrain generation¹. Something like this:

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