DrawTrSurf_BSplineSurface
9 1 1 0 0 2 3 3 4 2 2 0 0 0  2 0 10 2  3 0 20 10  1 0 30 0  2 
10 0 5  1 10 10 3  1 10 20 20  1 10 30 0  1 
20 0 0  2 20 10 2  3 20 20 10  1 20 30 0  1 

0 3
1 3

0 4
1 4


0

