Is there a way in VTK to create from an spline a 2DMesh ?
What we usually do is to warp a disk using thin-plate spline transform, by transforming the disk circumference points to the curve points. It creates a soap-bubble-like surface. See it in action here:
Source code is available here: https://github.com/SlicerHeart/SlicerHeart/blob/master/BafflePlanner/BafflePlanner.py