Hi Will,
Thanks for your comment. However I think that I need something different. As I understand the tool that you are pointing to is a mesh generator right?
My problem is that: I have a Ansys Fluent results and I want to post process them in Paraview. There are couple of readers, that I can try to use, like: Ensight files, Tecplot files or directly Fluent Case files, but this solution for me is unreliable because I have already noticed that with different releases of Fluent or Paraview it may work or not. This is why I wanted to find work around by myself.
For my simplified case, in Fluent I just have in the file the coordinates of the nodes and some scalar and vector data (I skip the differentiation between nodes and cell values for now). With PolyData and Delaunay 2D I was able to visualize all of the results in Paraview but this triangulation is not the best option (I am aware of that).
So what I want to do is to use the nodes coordinates that I store in file and to create the unstructured grid with the usage of vtk libriaries. But currently I am struggling with the convection used for nodes numbering during unstructured mesh generation in VTK because I cannot find any logic there that can be programmed with for example for loops which I see as a must if I have thousands of points.
Are any of the forum members has any experience with that?