[vtkusers] allocate in vtkUnstructuredGrid

[Amitesh Agarwal]

Hi all,

I have a small question.

What does extSize in
Allocate<http://www.vtk.org/doc/nightly/html/classvtkUnstructuredGrid.html#aeee14c44136d7e7e50a62837eb01598>(
vtkIdType<http://www.vtk.org/doc/nightly/html/vtkType_8h.html#20bd6b6dedfe1bbb096c50354d52cc7e>numCells,
int extSize) does while creating a vtkUnstructured Grid? Do we
have to explicitly declare numCells and extSize while allocating or will
InsertNextCell<http://www.vtk.org/doc/nightly/html/classvtkUnstructuredGrid.html#c2052de346ce05d14aea6f01330ab4bb>will
take care of it??

Thanks

Amitesh
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