[vtkusers] Create Structured Point Set?

[David Doria]

I am reading in a vtp file and then trying to run the vtkMarchingCubes
filter. It says the input is of type vtkPolyData, but a vtkImageData is
required.

I tried to use vtkMarchingContourFilter and it says no data to contour.

It makes sense that the points should be on a structured grid, but how do I
create one?

Thanks,

David
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