[vtkusers] Use of vtkGradientFilter..??

[siqi chen]

 Probably distance filed can be used to illustrate the gradient direction. I
upload a signed distance field to
www.rpi.edu/~chens/download/fastMarching.vti

siqi

On Sat, Feb 6, 2010 at 9:30 AM, David Doria
<daviddoria+vtk at gmail.com<daviddoria%2Bvtk at gmail.com>
> wrote:

> 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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