2nd order tensor storage inconsistency
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Some places in VTK use a C/row-major ordering of 2nd order tensors (vtkGradientFitler, vtkCell::Derivative()) and others assume a Fortran/column major ordering (vtkCellDerivatives, some of the numpy interface code). It's been decided that for consistency that VTK will go with C/row-major ordering.