Hi all,<br><br>I have a small question.<br><br>What does <span style="font-weight: bold;">extSize</span> in <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkUnstructuredGrid.html#aeee14c44136d7e7e50a62837eb01598">
Allocate</a> (<a class="el" href="http://www.vtk.org/doc/nightly/html/vtkType_8h.html#20bd6b6dedfe1bbb096c50354d52cc7e">vtkIdType</a> numCells, int extSize) does while creating a vtkUnstructured Grid? Do we have to explicitly declare 
<span style="font-weight: bold;">numCells</span> and <span style="font-weight: bold;">extSize </span>while allocating or will <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkUnstructuredGrid.html#c2052de346ce05d14aea6f01330ab4bb">
InsertNextCell</a> will take care of it??<br><br>Thanks<br><br>Amitesh<br>