[vtkusers] The vtkFillHolesFilter doen't work.

[zhaoxu1015]

Hello,
I'm trying to Fill a big hole in a surface model created in marchingcubes method.The surface  has a irregular  body ,and a big hole on the bottom,just like the hole of a sock(weared on the foot).What I'm trying to do is to make the suface a closed one.So I tried the vtkFillHolesFilter.But it doesn't make any difference.
I simply use the SetInput() and GetOutput() method of the class.So I wonder if there is any setting that should has been made to make it work to fill the big hole.
Thank you,
Charles.
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