Utkarsh, I believe some time ago I asked something similar regarding the having the reader making a call to RequestInformation before actually hitting the Apply button. Paul (Edwards) mentioned modifying the vtkGet/SetMacro to do this automatically. I tried it briefly and I got something to compile, but it didn't work and crashed out with segmentation fault.
Is it possible, in both cases, to achieve this by modifying some of the lower-level vtk code? Regards, Adriano =================================== Adriano Gagliardi MEng PhD Business Sector Leader Computational Aerodynamics Aircraft Research Association Ltd. Manton Lane Bedford Tel: 01234 32 4644 E-mail: [email protected] Url: www.ara.co.uk -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Utkarsh Ayachit Sent: 07 February 2011 14:50 To: Xunlei Wu Cc: [email protected] Subject: Re: [Paraview] Write a reader plugin 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 <[email protected]> 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: [email protected] > 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: '[email protected]' > 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.htm > l > 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 > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview > > _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview ********************************************************************** This email contains information that is private and confidential and is intended only for the addressee. 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