[Paraview] How to plot Surface StreamLines

[Richard GRENON]

Hello,

I am trying to plot streamlines on the surface of an aircraft using 
Paraview 3.40.
My data contain a multiblock structured surface grid only (no volume) 
with a 3 component vector at each point of the grid (may be the surface 
velocity vector from Euler flow computation or the skin friction vector 
from NS computations) .
I try to follow the example given in 
http://www.paraview.org/Wiki/Custom_Filters for creating a custom 
Surface Streamlines filter but I get only short lines from the seed points.
Also I can reproduce the example given in 
http://www.paraview.org/Wiki/Custom_Filters with a slice by a plane but 
this example does not work if the slice is not a plane (trying with a 
sphere). I don't undestand how to obtain surface streamlines if the 
surface is not a plane.
Is there an example or a tutorial for surface streamlines on non planar 
surfaces?
Thanks in advance.

-- 
 Richard GRENON
 ONERA
 Departement d'Aerodynamique Appliquee - DAAP/ACI
 8 rue des Vertugadins
 92190 MEUDON - FRANCE
 phone : +33 1 46 73 42 17
 fax   : +33 1 46 73 41 46
 mailto:Richard.Grenon at onera.fr
 http://www.onera.fr