Drawing trees
March 2010 (index)
The author of this post on Reddit drew all 551 unlabeled trees of order 12 by hand. I thought I'd try to do it using a program.
The end results is here.
It's using an existing list of all the trees which contains data like "0 8 0 9 1 8 1 10 2 9 2 11 3 10 4 11 5 11 6 11 7 11" (a list of edges for one tree). I use a force-directed algorithm to find a nice layout for each tree, then use PIL to draw them.
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