Brian's Brain as a brain-teaser...
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Was just playing around with implementing "Brian's Brain" in Numpy/Pygame it's a "life" style automata where there are just 3 rules:
- if cell is dying, cell dies
- if cell is alive, cell starts dying
- if cell is dead and > 2 neighbours are on, cell becomes alive
there was a post about doing this in Clojure which had the nice side-effect of making the whole thing run in parallel. I mistakenly started out thinking that numpy had data-parallel vector operations... oops. Guess that's not there (yet?) Anyway, the code is hacked together very quickly, you can play with it here:
bzr branch http://www.vrplumber.com/bzr/briansbrain
Click to restart with a new random data-set, Alt-F4 to exit. The code to calculate the "neighbours" (effectively a rolling sum/window of the 8 cells adjacent to each cell) wound up far less efficient than I'd originally planned. Originally I was mutating the one array in-place and basically running it in a trail around the core cell, but that wasn't at all clear looking in the code.Anyway, not at all what I was needing to get done this evening, but there it is.
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