[Paraview-developers] Get data from server to client (helper?)

[Utkarsh Ayachit]

John,

How are you expecting this to work in parallel? Is the "Histogram"
supposed to fetched from the root node alone?

Utkarsh

On Tue, Sep 24, 2013 at 11:14 AM, Biddiscombe, John A. <biddisco at cscs.ch> wrote:
> A filter generates some data and makes it available via
>
> GetHistogramData() - it could be a vtkInt/DoubleArray or even a vtkImageData
> depending on use.
>
>
>
>         <ProxyProperty name="Histgram"
>
>                        command="GetHistogramData"
>
>                        informationonly=1>
>
>         </ProxyProperty>
>
>
>
> How can I access this in the client?
>
>
>
> Trying this …
>
>
>
>   vtkSMProperty *histoarray = repr->getProxy()->GetProperty("Histogram");
>   if ( histoarray != 0) {
>       vtkSMProxyProperty *temp =
> vtkSMProxyProperty::SafeDownCast(histoarray);
>       temp->GetProxy(0)->UpdatePropertyInformation();
>
>       vtkIntArray *histogramvalues =
> vtkIntArray::SafeDownCast(temp->GetProxy(0)->GetClientSideObject());
>       std::cout << "Here" << std::endl;
>   }
>
>
>
> results in a segfault at the GetClientSideObject. I was hoping that I could
> get the data transferred across using a vtkDataObject and then access it,
> but it doesn’t work as I had hoped.
>
>
>
> I’m aware that I could use an vtkIntVectorProperty and then an
> simpleIntVectorPopertyHelper, but this was much too slow when I tried
> before, so I hoped to be able to use a dataset or data array directly. There
> doesn’t seem to be a helper for a vtkDataSet (imagedata would be lovely as I
> want to transfer some 2D arrays as well).
>
>
>
> Is there an example in the source that does this?
>
>
>
> ta
>
>
>
> JB
>
>
>
> --
>
> John Biddiscombe,                        email:biddisco @.at.@ cscs.ch
>
> http://www.cscs.ch/
>
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
>
> Via Trevano 131, 6900 Lugano, Switzerland   | Fax:  +41 (91) 610.82.82
>
>
>
>
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