[vtkusers] vtkPolyDataNormals how to compute points' normal

[Bill Lorensen]

Marching Cubes computes the normals from the gradients of the image data.

vtkPolyDataNormals computes the normal; at a point by averaging all of
the cell normals that use the point.

On Fri, Dec 18, 2009 at 11:07 PM, renlishen <renlishen at gmail.com> wrote:
>
> hi everyone
> Does anyone knows how the vtkPolyDataNormals to compute the points'
> normal..?
> like "Marching Cubes: A high resolution 3D surface construction algorithm"
> says that?
> http://old.nabble.com/file/p26852626/kkk.png
> I really want to know..
>
> thanks again...
>
> renli shen
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