[vtkusers] Use of vtkGradientFilter..??

[David Doria]

On Thu, Feb 4, 2010 at 12:04 PM, Rakesh Patil <rakeshthp at in.com> wrote:

> Hi.
>
> Can any one explain me the exact use of vtkGradientFilter.?? What it is
> used for..?
>
> Thanks
>
>
It sounds like it computes the gradient of a scalar field defined at the
points or cells of any data set (ImageData, StructuredGrid,
UnstructuredGrid, PolyData).

I got a usage example from a test and adapted it a little bit (got rid of
the CREATEMACROS):
http://www.vtk.org/Wiki/VTK/Examples/GradientFilter

The gradient on this data set is hard to interpret. If someone has a data
set that would illustrate a gradient better it would be much appreciated.

Thanks,

David
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