[vtkusers] extract Principal Curvatures

[philip batchelor]

Hi

you can either use a vtkCurvatures filter with appropriate settings, but 
the principal curvatures can be unreliable for rough surfaces, as they 
are computed indirectly from mean and Gauss, or use the attached class 
for vtkCurvatureTensor which also returns the principal curvatures in a 
more direct way (with the principal directions too).
vtkCurvatureTensor->GetOutput()->GetPointData()->GetScalars() is a 2 
component data array whose components are min and max principal curvatures.

Ph
PS: Expect that the class structure for curvatureswill change future vtk's.

Zied Majdoub wrote:

> Hello,
> I need to know how to access the minimum and maximum pricipal 
> curvature in a vtkPolyData structure.
> thanks in advance
>
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