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

[Utkarsh Ayachit]

Try:

vtkSMPropertyHelper(repr->getProxy(), "RadiusArray").Set(4, "radius");
  ...
repr->getProxy()->UpdateVTKObjects();

Utkarsh

On Wed, Jan 2, 2013 at 2:57 PM, Christian Richter
<christian.richter at ovgu.de> wrote:
> 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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>>
>
>
>