[vtkusers] Arbitrary cut plane

[Maria Vatshaug Ottermo]

Hi!

I am trying to cut an arbitrary plane in a volume. To do this I use
vtkPlane and vtkCutter. I've managed to do cutting by selecting three
points in the volume and computing the plane normals. The problem is that
I would like to do the cutting by letting a user move a plane that
intersects with the volume and then return the intersection. I have tried
to do this by using vtkPlaneSource to draw a plane in the same window as
the volume. The user can select an arbitrary centerpoint for rotation of
the plane. After interaction I was hoping that I could extract the new
plane normal and then use vtkPlane and vtkCutter to do the cutting in the
same way as I did for the points, but I am not able to find the normals after
interaction. Does anybody know how this can be done?

Thank you in advance!

Maria Ottermo