NURDSes Non-uniform Recursive Doo-Sabin Surfaces Coefficients c Combining the two equations,one obtains a system of linear equations with respect to cj,j=0,...,n-1.Then we have cj= oak' where 远a+-+2e Here,indices are taken modulo n. ZHuang.G Wang Non-Uniform Recursive Doo-Sabin Surfaces (NURDSes)NURDSes Non-uniform Recursive Doo-Sabin Surfaces Coefficients cj Combining the two equations, one obtains a system of linear equations with respect to cj , j = 0, . . . , n − 1. Then we have cj = αj Pn−1 k=0 αk , where αj = 1 2 ( nY−1 k=0 pj+k + nY−1 k=0 qj−k) + Xn−1 m=1 ( Ym k=1 qj+k nY−1 k=m pj+k). Here, indices are taken modulo n. Z Huang, G Wang Non-Uniform Recursive Doo-Sabin Surfaces (NURDSes)