<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div>Hello,<br></div><div><br></div><div> I would like to create an ASCII output files in vtk (unstructured) format from a CFD code written in fortran.<br></div><div><br></div><div> The main parts of cells are cartesian hexa (cube) but the boundary cells can be polyhedral (convex and concave).<br></div><div><br></div><div> Then, I want to use polyhedron cell type (referred as 42 in vtk) but it seems difficult to find examples ?<br></div><div><br></div><div> I guess polyhedron cells need more informations as there is no specific order for the nodes ?<br></div><div><br></div><div>Thanks,<br></div><div>-- <br></div><div><span name="x"></span>David <br></div></div></body></html>