The
SETUP button colors a few particles in the middle of the
screen and prepares the program to run.
The
GO button sends particles in motion.
The
WIGGLE slider controls the maximum amount of a particle's
random heading adjustment with each time step.
The
STICKY? slider differentiates between two alternative
detection methods for when a particle has collided with
the group. When set to 0, a particle stops moving when
any of the surrounding eight patches is occupied by
a particle; when set to 1, a particles stops moving
only when the patch directly in front of it is occupied.
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