[vtkusers] read a stack of images (as numpy array) into marching cubes

[alex.braun]

I have a stack of PNGs that I'm reading into a numpy array (3D tensor) and
then into a vtk array via: 

    data = numpy_to_vtk(num_array=data.ravel(), deep=True,
array_type=vtk.VTK_INT) 

I would like to feed this into vtkDiscreteMarchingCubes and then pump the
output back to numpy or an obj file, but marching cubes takes a DataObject
and I have no idea how to convert an array into one. 

Any suggestions? 



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