[vtkusers] about polygons

[zhuo Chen]

Hi,all vtkusers
After using vtkMarchingCubes to construct 3D model,
dose the 3D model consist of a series of triangle
polygons and only consist of these polygons(not
contain other cell type)?
I also want to know how to get the normal of every
polygon and what rule to produce the normal(that means
from local point of view,does the normal point at
outer space of the model or inner space of the model?

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