[vtkusers] SetActiveAttribute

[Berk Geveci]

You are never allowed to modify a data object that is between two
pipeline object. You will always loose your changes when the pipeline
executes. You need to use a vtkAssignAttribute filter. I would also use
vtkMergeDataObjectFilter to append your data array.

-Berk

On Wed, 2004-02-04 at 07:03, Cleo Pau wrote:
> Hi,
> 
> We wrote an application based on vtk. The input is a dataset, for which
> we have several scalar and vector attributes. We read the geometry by
> using vtkDataSetReader, and we add the attributes with AddArray to the
> CellData.
> 
> What we want to do is to select for example one of the vectors and see
> the hedgehog for our data set and the selected vector attribute. Then,
> when selecting a new vector, to see the new hedgehog. We thought that we
> could do this with SetActiveAttribute.
> 
> But, it seems to have effect only for the first selected attribute. In
> the example, I can see the hedgehog corresponding to the initially
> selected vector (before the creation of the pipeline). Once the pipeline
> is created, I cannot update it to use the new selected vector.
> GetActiveAttribute reports though the selected vector. I tried calling
> the Update method everywhere in the pipeline with no effect.
> 
> How could we solve this problem?
> 
> Thank you in advance for any suggestion,
> Cleo
> 
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-- 
Berk Geveci <berklist at nycap.rr.com>