On Sat, Jan 02, 2010 at 09:58:10AM -0800, David Fotland wrote:
> You say radius = 3, then 3x3 patterns.  Which is it?  Radius 3 would be 5x5
> to 7x7, depending on how you define the radius.

I use it in the CrazyStone/Stern sense, where they use what I call the
"gridcular" metric: d = dx + dy + max(dx, dy) - it creates circle-like
structures on the grid, and d<=3 corresponds to the 3x3 patterns:

d=0:

  +

d=2:

  +
 +.+
  +

d=3:

 +.+
 ...
 +.+

d=4:

  +
 ...
+...+
 ...
  +

d=5:

 +.+
+...+
.....
+...+
 +.+

etc.

                                Petr "Pasky" Baudis
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