[Paraview] [EXTERNAL] Some doubt about function: int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *outVec);

[Moreland, Kenneth]

I don't know if there is any point in subclassing those classes, but to answer your question, the object you get in the output vector is the same object created in a previous call to RequestDataObject.

-Ken

Sent from my iPad so blame autocorrect.

On Sep 15, 2013, at 8:44 AM, "庞庆源" <pangqingyuan1991 at gmail.com<mailto:pangqingyuan1991 at gmail.com>> wrote:

If my reader inherit from vtkPolyDataAlgorithm,then outVec->GetInformationObject(0)->Get(vtkDataObject::DATA_OBJECT()) will return a vtkPolyData pointer.
else if my reader inherit from vtkUnstructuredGridAlgorithm,then outVec->GetInformationObject(0)->Get(vtkDataObject::DATA_OBJECT()) will return a vtkUnstructuredGrid pointer.
else if my reader inherit from vtkMultiBlockDataSetAlgorithm,then outVec->GetInformationObject(0)->Get(vtkDataObject::DATA_OBJECT()) will return a vtkMultiBlockDataSet pointer.
And so on.
But what will return if my reader inherit from the subclass of above algorithm?
For example,vtkSampleFunction,vtkSphereSource.
--
庞庆源<mailto:pangqingyuan1991 at gmail.com>
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