[vtkusers] Cannot access to functions in vtkCurvatures class!!!

[Francois Bertel]

Hello,

VTK/Graphics/vtkCurvatures is a filter. As any filter in VTK, you are
supposed to feed its input with some dataset (or some output port of
another filter), update it (to perform an execution) and get the
result in its output.

There is a test in VTK/Graphics/Testing/Cxx/TestCurvatures.tcl that
shows how to use it:

Here the C++ version of it:

vtkCurvatures *curve1=vtkCurvatures::New();
curve1->SetInputConnection(cleaner->GetOutputPort());
curve1->SetCurvatureTypeToGaussian();

vtkCurvatures *curve2=vtkCurvatures::New();
curve2->SetInputConnection(cleaner->GetOutputPort());
curve2->SetCurvatureTypeToMean();

then call Update() on the filter to make sure its output is up-to-date
and look at it:

curve1->Update();
vtkPolyData *result=curve1->GetOutput();

BTW, I didn't know about this class. I just performed a grep about
vtkCurvatures in the VTK source dir. In general, if you wonder how to
use a class just look for the class name in any VTK/<package>/Testing/
directory.
Or just google about it, I found this message also about
TestCurvatures.tcl
http://osdir.com/ml/lib.vtk.user/2002-10/msg00630.html


On Thu, Oct 2, 2008 at 5:29 PM, B. C. <butterfly.1688 at yahoo.fr> wrote:
> Good evening everybody.
> I'm using vtkCurvatures class to extract curvatures from a polydata object.
> I'm refering to 'VTK vtkCurvatures Class Reference.mht'
>
> When i try to extract maximum curvatures using 'GetMaximumCurvature' , i
> have this error message:
> 'GetMaximumCurvature' : is not a member of 'vtkCurvatures'
> And, when i try to extract mean curvatures using 'GetMeanCurvature' , i have
> this error message:
> 'GetMeanCurvature' : cannot access protected member declared in class
> 'vtkCurvatures'
>
> What should i do for each case?? I'm using vtk 4.4
>
> Thank you so much
>
>
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-- 
François Bertel, PhD  | Kitware Inc. Suite 204
1 (518) 371 3971 x113 | 28 Corporate Drive
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