[vtkusers] how to write vtkPoints into a vtk file?

[Yang, Yuhui]

Sorry if i have multi-posted. it keeps telling me undelieved. 
 
Hi, I am trying to write the points into a file. i have tried some methods but they don't work for me.
should I transform the vtkpoints to some other formats?
 
the purpose for writing into a file is doing point-based registration, how can i do that?
 
thanks alot
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