[vtkusers] interpolation

[Oliver Gloth]

Hello,

What would be the best way to interpolate attributes of a
vtkUnstructuredGrid? I have a given point (x,y,z) which is not a node of the
grid and I want to interpolate the values of point attributes for this
position.

It is not a visualisation task -- I am rather "abusing" the VTK data
structures for unstructured mesh generation.

Thanks,
Oliver