[vtkusers] assigning scalar values to gridpoints

[Steffen Oeltze]

Dear VTK-users,

I've got a grid an I'd like to assign scalar values to certain 
gridpoints. At the moment I'm using
grid->GetPointData()->SetScalars("vtkFloatArray"); for that purpose. My 
scalar-array is of
the same size as my grid. That 's been ok as long as I visited each 
gridpoint in a for-loop. However,
I have improved my algorithm and now, I calculate values only at certain 
gridpoints.
Is there a way to assign a certain value to a specific gridpoint and to 
set all the other gridpoint
values to zero ?

Thank you very much in advance for your help.

Steffen