Ulam
By wjm - uploaded on 2008-8-10 264 views (5 in the last 7 days)
Tags: demo with-source
Please download Ulam_1_02_full source
code so that you can use Actors to do
a lot of extra stuff.
Download the source for this scenario.
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davmac writes (on 2008-8-12):
That looks interesting. Can you explain a little about the pattern it generates? (I know the source is available, it would be nice to have a little explanation here though).
wjm writes (on 2008-8-12):
Thanks for taking a look. The pattern is made up of natural (1+ integers) numbers that are 'wrapped' in a square-like spiral like this:
5 4 3
6 1 2
7 8 9 10
In the image, each non-prime is a white pixel and each prime is a
dark (gray) pixel. There is a concentration of primes along certain
diagonals (and a few horizontal and vertical) lines. This surprises
most people upon first viewing (there is actually a very simple reason
for it). Try downloading the full scenario and you will be able to
have more control over your patterns (called Ulam spirals after their discover. See http://en.wikipedia.org/wiki/Stanislaw_Marcin_Ulam).
davmac writes (on 2008-8-13):
Ah yes, I understand. Thanks!
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