关于二维码的一个实例，一个非常好的可以学习如何编码和解码2nd bar code

Make a point move in the 2D plane State = (x y xdot ydot). We only observe (x y). This code was used to generate Figure 17.9 of "Artificial Intelligence: a Modern Approach", Russell and Norvig, 2nd edition, Prentice Hall, in preparation.-

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2nd exercise of computer graphics course