[Paraview] specifying cell data

[Natalie Happenhofer]

Hi!
I´m writing a filter that has as output an Unstructured Grid. As far as I know, to specify that grid, I need to specify the points and the cells. I´m wondering how to specify the cells - I need quadrilaterals. How can I specify them? I need a routine which lets me specify the points (4 in that case) and then insert it into a vtkCellList, which I can assign to the output. 

thx,
Natalie

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