I am using VTK to do some visualization of 3D meshes. The cells in my model are quadratric quads. Until now, I've cheated by using simple quads and by skipping the mid-edge nodes.
I now need to display quadratric quads instead. By simply changing the type and adding mid-edge nodes in my script I was able to make it work. However, the quadratic quads looks somewhat "folded" and new edges appeared inside.
Is there a way to get a simple curvature and remove these edges inside ?
Here is what I get. (Quadratic quad on the left, Simple quad on the right)