_closest_point_on_circle(p, radius, center)
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_disperse(particles, field_size)
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_distance_to_circle(p, radius, center)
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_move_to_rings(particles, radii, center)
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_random_nearby_point(p)
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_rotate_around_center(p, center, theta)
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_settle(particles, text)
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_spin_rings(radius_to_particles, center[, ...])
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ring_effect(text)
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Create a ring effect. |