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[\-max\-cracks \fInummax\fP]
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[\-sand\-grains \fInumgrains\fP]
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[\-circle\-percent \fIcirclepercent\fP]
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Lines like crystals grow on a computational substrate. A simple
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perpendicular growth rule creates intricate city-like structures. Optionally, cracks may also be circular, producing a cityscape more familiar to places for which city planning is a distant, theoretical concern.