Hi Bane,
Thanks a lot for your advice. That is really helpful.
Now I can build a 3D mesh by extruding the upper surface using vtkLinearExtrusionFilter. I also have managed to clip the mesh with a plane simply by using vtkClipClosedSurface (though that is not what I need).
However, it always failed when turns to the clipping the 3D mesh using the surface underneath, I have also tried to use vtkClipPolyData but neither giving an expected result.
Do you think those methods could do the task with surface / delaunay2D as an input? Or do I need another method/filter type?
