[vtkusers] Streamline in fluid flow

[Berk Geveci]

> Is it possible to perform mathematical operations on a physical field along
> a previous generated streamline?

Not using existing vtk filters. You have to get the generated streamline
data (as a vtkPolyData object) and perform the calculation yourself. It
shouldn't be too hard. Each streamline (or two, if the both integration
directions were used) is stored as one cell. All you have to do is to
get each cell and iterate over the points.

-Berk