[vtkusers] How to get points from VtkPolyData

[Alejandro Galindo Mateo]

Hello VTK users,

I have a vtkPolyData with points, polygons and scalars and I only want the 
points with the scalars.  I tried with:

vtkPolyData data

data SetPoints [[Filter GetOutput] GetPoints]

for the points and:

[data GetPointData] SetScalars [[[Filter GetOutput] GetPointData] 
GetScalars]

for the scalars. [Filter GetOutput] is a vtkPolyData and it´s not empy 
because I can render it with a mapper and the data is represented correctly.

But the result is that the vtkPolyData data is empty.  I would like to know 
if I need to do another thing to copy the points.

Thanks for all,