Xunlei,
Are you expecting to see the extents setup correctly before hitting
the Apply button the first time? That indeed won't be the case. You'll
have to hit apply and let the actual data-reading happen before the
information will be shown on the "information tab".
Utkarsh
On Sat, Feb 5, 2011 at 5:46 PM, Xunlei Wu <xunlei at renci.org> wrote:
> Hi David and All,
>
> I still have trouble seeing any updates in ParaView (ParaView Git built from source with VS2008 and Qt 4.6.3 on Windows 7 64bit) after loading a GRIB2 file. For simiplicity, I have created a skeleton version of my GRIB2 reader. I have only implemented RequestInformation() with some fabricated WHOLE_EXTENT() data. I have successfully built such reader as a plugin .dll (Windows) and loaded it into ParaView through Tool -> Manage Plugins. After you load a grib2 file also attached, RequestInformation() is called and WHOLE_EXTENT() has been updated. However, I do not see such change in "Object Inspector" -> "Information" panel.
> I am not sure what I did wrong. And is there anything special I need to do when build ParaView from source? FYI, "BUILD_SHARED_LIB" is on.
> Would you please help me? Thank you very much.
>
> Best,
> x
>
> -----Original Message-----
> From: Xunlei Wu
> Sent: Friday, January 21, 2011 12:10 PM
> To: David Doria
> Cc: paraview at paraview.org
> Subject: RE: Write a reader plugin
>
> Hi All,
> Do you have any suggestions? Thanks a lot.
> Best,
> xunlei
>
> -----Original Message-----
> From: Xunlei Wu
> Sent: Saturday, January 15, 2011 5:44 PM
> To: 'David Doria'
> Cc: 'paraview at paraview.org'
> Subject: Write a reader plugin
>
> Hi David and all,
> I am writing a reader plugin for ParaView. A test program without the VTK wrapping approves that I can get all the header (metadata) and grid data correctly. However, when I following the examples posted in http://www.vtk.org/Wiki/ParaView/Examples/Plugins/Reader
> http://www.kitware.com/products/html/WritingAParaViewReaderPlug-in.html
> and vtkStructuredGridReader.h/.cxx
>
> I got confused. Shall I subclass vtkStructuredGridAlgorithm or vtkStructuredGridReader? What are the differences? With minor differences in the code, i.e. defining char* FileName, I have both scenarios built fine.
>
> Let's say, we are subclassing vtkStructuredGridAlgorithm for now on. After I populate values as the following
>
> int vtkGRIB2Reader::RequestInformation(vtkInformation* vtkNotUsed(request), vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector *outputVector)
> {
> ...
> vtkInformation* outInfo = outputVector->GetInformationObject(0);
>
> outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), ext, 6);
> outInfo->Set(vtkDataObject::SPACING(), this->Spacing, 3);
> outInfo->Set(vtkDataObject::ORIGIN(), this->Origin, 3);
>
> return 1;
> }
>
> In ParaView Object Inspector / Information widget, I did not see any update in all the fields except Statistics / Type: Structured (Curvilinear) Grid. Would you please help me? Did I populate outInof in the wrong place? Thanks a lot.
>
> Best,
> xunlei
>
>
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