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3.11 Flocking with Teeth: Predators and Prey 335
selves, particularly if one were to try to adopt this code for a game. Although only flies can reproduce in the demo, it's a simple matter to allow both sparrows and hawks to do so. Another potential improvement that could help "close the loop" ecology-wise might be to give the flies something to feed on as well, perhaps hawk feathers.
Finally, an excellent book that addresses the topic of artificial life in general, in addition to discussing both flocking and boids, is Steven Levy's Artificial Life [Levy93].
[ReynoldsOO] Reynolds, Craig, maintains an extensive reference on flocking and steering behavior at www.red3d.com/cwr/boids/ and has presented a wide variety