Description: Let P (m, n) is the initial control point of the column, i.e. the original surface of the point (m rows n columns). Q (m, n) is the control node of the surfaces one after subdivision. This function takes a Catmull-Clark subdivision surface algorithm, the bi-cubic B-spline surface subdivision, ie m = n = 4. Using knowledge in Chapter 13, section IV, formula MQM, ' = SMPM' S' , wherein M, S by courseware known structure the initial control point of the column (p1, p2), where p1 is the row coordinate of P, p2 column coordinates of P
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Catmull-Clark 细分曲面.fig
13章 Catmull-Clark 细分曲面.m
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