[vtkusers] How to insert edges?

[Petru Pau]

Thank you, Sean, and sorry to everybody: I should have checked the
archives first.

What you said, Sean, is the obvious thing to do; unfortunately, this 
occured to
me only after reading your mail. :) I am most grateful for your answer.

Regards,
Petru

Sean McInerney wrote:

> Hi Petru,
>
>   The VTK readers ... make no checks WRT the planarity of quads or 
> polygons ...
>
>   To break a given quad into two triangles, you will have to remove 
> the cell entry for the quad as well as inserting the two cell entries 
> for the triangles.