[vtkusers] extract curvature value of point.

[Mathieu Malaterre]

VTK is demand driven, if you don't call Update on the filter you are 
using, the pipeline won't execute.

HTH
Mathieu

Moti Freiman wrote:
> hello!
> i'm trying to develop some algorithm for my thesis.
> now i need to extract the curvature value at each point of 3d volume 
> which represented by vtkPolyData object.
> i found the class vtkCurvatures, but i did not understand how i get the 
> curvature value at each point.
> when i check the polydata output object i got nothing.
>  
> thank you
> moti freiman
> 
> 
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