Dear getfem project Could you merge devel-tetsuo-xml? This branch is addition of vtu_export class. By using this class we can export xml unstructured grid format vtk (only ascii format and write_point_data). I tested it by using meshio package (https://github.com/nschloe/meshio). In the future, the binary format and write_cell_data method may be extended.
Thank you for reading. BR Tetsuo
