[vtkusers] help:how to display a nurbs surface in VTK?

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now I need to display a nurbs surface in vtk. I ance displayed a nurbs 
surface in openGL,and I found that there is a GLUnurbs class in openGL,but I 
can't find the similar class in vtk.I only find a vtkCardinalSpline and 
vtkKochanekSpline,but what I need is not only nurbs spline,but also nurbs 
surface.I am not srue whether I can use openGL's GLUnurbs class or not,if I 
can,how to transmit the information of the object of the GLUnurbs class to 
vtk?I'd really appreciate it if someone could give me some advise.

sincerely yours,
stephen
12.2




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