Group Animation is a difficult technology problem which always has not been solved in computer Animation
technology, All current methods have their limitations. This paper put forward a method: the Motion Coordinate and
Motion Speed of true fish group was collected as sample data, reverse cloud generator was designed and run,
expectation, entropy and super entropy are gotten. Which are quantitative value of qualitative concept. These parameters
are used as basis, forward cloud generator was designed and run, Motion Coordinate and Motion Speed of two-dimensional
fish group animation are produced, And two spirit state variable about fish group : the feeling of hunger,
the feeling of fear are designed. Experiment is used to simulated the motion state of fish Group Animation which is
affected by internal cause and external cause above, The experiment shows that the Group Animation which is designed
by this method has strong Realistic.
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