GitLab

To reproduce:

• Source -> Sphere -> Apply
• Filter-> Curvature -> Apply (the default curvature displayed is Gaussian, and is working fine )
• Switch the curvature type to Mean, nothing is displayed, and the legend caption remain Gauss_Curvature.

In filters_filtersgeneral.xml we have

      <IntVectorProperty command="SetCurvatureType"
                         default_values="0"
                         name="CurvatureType"
                         number_of_elements="1">
        <EnumerationDomain name="enum">
          <Entry text="Gaussian"
                 value="0" />
          <Entry text="Mean"
                 value="1" />

If we switch default_values="0" to default_values="1", the opposite happen: the Mean curvature is working, but not the Gaussian.

So this is not a problem in the implementation of the Mean curvature.

In vtkCurvatures::GetGaussCurvature(vtkPolyData* output) we have something equivalent to:

gaussCurvature->SetName("Gauss_Curvature");
output->GetPointData()->AddArray(gaussCurvature);
output->GetPointData()->SetActiveScalars(gaussCurvature->GetName());

and in vtkCurvatures::GetMeanCurvature(vtkPolyData* output) we have something equivalent to:

meanCurvature->SetName("Mean_Curvature");
output->GetPointData()->AddArray(meanCurvature);
output->GetPointData()->SetActiveScalars(meanCurvature->GetName());

If both names "Mean_Curvature" and "Gauss_Curvature" are renamed with the same name as for instance "Curvature", things are working fine.

So the problem would be that SetActiveScalars is not working correctly, or that the filter is not loading the active scalar. But I don't know where this happen.

Any thought?