[vtkusers] Functions are not accessible!!!

[B. C.]

Hi,
I want to compute maximum curvature at each point of my polydata. To do this, i use 'vtkCurvatures' class. 
 
I found the function called 'GetMaximumCurvature' which takes a polydata as input an gets a polydata with maximum curvatures as output.
The call of this function for my polydata gives this error message: 'Cannot access to protected members of vtkCurvatures class'!!!
 
Can someone telle me how to do this and if there is another method to compute maximum curvatures at each point?
I made a search at the messages of the mebers but i didn't found a helpful thing.
 
Thank you. 
 
 


      
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