Swarm
20 robots fly in a coordinated manner or coordinate.
General Robotics, Automation, Sensing and Perception Laboratory (Grasp) of the
University of Pennsylvania. The swarm behavior is covered by the
Reynolds-Algorithm which was used in movies
like "Batman Returns". The algorithm assures that individual swarm member stay
in fixed distance to each other and in the same direction.
You can experiment with the algorithm
Try it out (program by Guilherme Polo).
Sources: