Today is not my most successful in that I’m spending it hiding in a hostel room in a temple on a mountaintop south of Osaka, and skipping my nightly bath because it’s a communal ladies room; but sometimes those are just the pragmatics. Happy day to all of you out there, I hope you’re just as visible as you’re able to be and that we all keep widening that horizon.

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Basic models of flocking behavior are controlled by three simple rules: 1) separation: avoid crowding neighbours (short range repulsion); 2) alignment: steer towards average heading of neighbors; 3) cohesion: steer towards average position of neighbors (long range attraction). With these three simple rules, the flock moves in an extremely realistic way.