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

[庞庆源]

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 <pangqingyuan1991 at gmail.com>
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