Competition Rule and Community Evolution of Artificial Fish

Artificial fish is researched in this paper. Artificial life´s characteristic of self-evolution is introduced in computer animation. Efficiency and automation level of animation of artificial fish is improved. An evolution model of artificial fish based on competition rule is put forward and built. Fitness function of artificial fish is given. These provide foundation for artificial fish to live in the virtual environment simulating natural competition. A community evolution model based on energy conservation law is put forward and built. The model represents natural selection. The size of fish´s community is changed periodically restricted by the model, and fish community could automatically evolution of goal-oriented.