[Paraview] How to change the Representation within a Plugin ?

[Christian Richter]

Thank you Utkarsh,
thas does the trick.

Can you give me a hint how I can do
DataRepresentation1.RadiusArray = [None, 'radius'] //python trace
in C++ ?
Thanks,
Christian

Zitat von Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:

> Try calling the following before  src->updatePipeline() before
> attempting to create the representation. The reader hasn't been
> executed yet and hence it doesn't provide any information about what
> type of data it will produce and hence createDataRepresentation()
> cannot create any data-representation for it. updatePipeline() forces
> the reader to execute i.e. it's RequestData() will get called and then
> the rest should work as expected.
>
> Utkarsh
>
> On Tue, Jan 1, 2013 at 5:50 AM, Christian Richter
> <christian.richter at ovgu.de> wrote:
>> Hi,
>>
>> I've written a Plugin to use Paraview as "LiveView" for our simulation Data.
>> With a QFileSystemWatcher the Plugin updates the filenames of the
>> fileseries-reader everytime a new result-file was written to disk.
>>
>> Now I want to change the Representation from Point to Point Sprite
>> automaticly after the source is created and set some standard properties.
>> In Pythion I used:
>>         xreader=liggghts_Reader(guiName="liggghts_dump")
>>         xreader.FileNames=files
>>         SetDisplayProperties(xreader, Representation="Point Sprite")
>>         DataRepresentation1 = Show()
>>         DataRepresentation1.PointSpriteDefaultsInitialized = 1
>>         DataRepresentation1.Texture = []
>>         DataRepresentation1.RadiusTransferFunctionEnabled = 1
>>         DataRepresentation1.RadiusMode = 'Scalar'
>>         DataRepresentation1.Representation = 'Point Sprite'
>>         DataRepresentation1.RadiusArray = [None, 'radius']
>>         DataRepresentation1.RadiusIsProportional = 1
>>
>> And I tried this in my C++Plugin:
>>     src = builder->createReader(QString("sources"),type, files, s); //works
>>     src->rename(type);
>>
>>     pqActiveView& myActiveView=pqActiveView::instance();
>>     this->RenderView=myActiveView.current();
>>     pqDataRepresentation *repr =
>> builder->createDataRepresentation(src->getOutputPort(0), this->RenderView);
>>     vtkSMPropertyHelper(repr->getProxy(),"Representation").Set("Point
>> Sprite"); //segfault
>>
>> but get segfault at last line because repr is still NULL.
>> I attached the code and here is a video where you can see the Plugin
>> working.
>> http://youtu.be/5CGGf-kPcEQ
>>
>> best,
>> Christian
>>
>>
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