Eric Weeks - personal pages - pictures

Santa Fe CSSS95 Picture #4

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Dave Ardell wanted to do a CA on a quasi-crystal, so I got out my quasi-crystal program that I had to write for a solid-state physics class in 1994. After learning how to fill polygons using PostScript, I wrote a simple program that would print a picture of a quasi-crystal with the colors of each tile being chosen somewhat randomly. (The algorithm for coloring is not actually random at all, although the overall affect does appear fairly random.) Picture 4 shows this tiling; this quasi-crystal is made of up two sorts of diamonds, a fat diamond and a skinny diamond.

This quasi-crystal has, to some extent, five-fold symmetry. It does not have any overall periodicity, which is why it is a quasi-crystal and not a crystal.

If you have questions send me email, email address below.

Interested in the software to create this picture? Click here. Software is public domain.

Current address:
Eric R. Weeks
Department of Physics
Emory University
Atlanta, GA 30322-2430