[vtkusers] vtkCellDerivatives

[Andy Bauer]

Hi Martin,

Changing the name of the SetTensorModeToComputeStrain method to something
else would break backward compatibility which is generally avoided in VTK.
Other options for this include deriving a class to compute non-linear
strain from vtkCellDerivatives if it shares enough of the algorithm with
the linearized version or maybe just creating a new filter.

Cheers,
Andy

On Sat, Dec 26, 2015 at 4:36 PM, Martin Genet <
martin.genet at polytechnique.edu> wrote:

> Dear VTK users:
>
> I realize that the vtkCellDerivatives filter, when
> SetTensorModeToComputeStrain is activated, returns the symmetric part of
> the gradient of the input vector field, which is the linearized strain
> tensor, i.e., not a proper measure of deformation when large displacements
> are involved. Would that make sense to have two different modes,
> SetTensorModeToComputeLinearizedStrain or
> SetTensorModeToComputeSymmetricGradient, and SetTensorModeToComputeStrain
> or SetTensorModeToComputeGreenLagrangeStrain? Thanks!
>
> Martin
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