I am currently developing a tool to create a 3D mesh or volume from two non-closed surface using vtk.
For illustration: Imagine a Digital Elevation Model (surface model) that lies on top of another DEM with a vertical distance between them (the first has an average altitude of 200 m, and the second is 100 m above sea level).
The problem is, I was successfully visualize both surfaces using vtkDelaunay2D (input file XYZ points), but I had a problem when i am going to fill (or close) the space between them, since I need to get a closed surface (or volume).
I have tried using vtkExtractSurface, vtkDelaunay3D, and vtkUnstructuredGridVolumeRayCastMapper, unfortunately non of them give a decent result.
Do you guys have a suggestion which vtk filter fits best for my case? Any suggestion will be very helpful.