VTK expects that the tensor fields generated by the gradient of a vector field
to have FORTRAN ordering instead of C ordering.
Discovering this actually uncovered bugs in the Vorticity and QCriterion
implementation where they presumed FORTRAN ordering, and would generate
incorrect results.
Basically we can run the gradient worklet and compute the Divergence, Vorticity,
and QCriterion without ever having to store the gradient tensor in global memory