Hi everyone,

I’m new about rhino and i want to model a surface which i draw the shape in the attached jpg file. The knot vectors are U={0,0,0,0.5,1,1,1} (degree of the knot vector U is p=2) and in the other direction the knot vector V={0,0,0,1,1,1} (degree of the knot vector V is q=2). Therefore the total number of control points are n x m = 4 x 3 = 12 and it is seen that i want to model a two element surface.

Could you examine the attached file and give an idea about how it could be done in the Rhino.

Best regards,

Çetin CUMA