FlockI took a pass at flocking. Unfortunately, i've lost the source-code to this app. Jeeze! But the download is still fun to play with. The essence of flocking turned out to be collision prediction. With the simple rule of just avoiding Predicted Collisions, birds tend to align in self-organizing flocks! Other rules were added for Hunting, and dealing with walls has some problems, but basically it was fairly simple. Here's the download and a few screenshots.
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 collision predictions |
 Everybody's chasing the white one. Every bird has a fixed speed, and about half the chasers are faster than the chasee. so amusing! |
 more chasing |
 The faster birds in front are trying to curve around to get at the slower target behind them. |