<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">I'm playing with vtk using unstructured grids composed with polyhedron elements. I used some algorithms such as vtkPolyDataNormals and vtkExtractUnstructuredGrid and they didn't seem to work with polyhedrons. (For example, take a look at <a href="http://www.paraview.org/Bug/bug_relationship_graph.php?bug_id=14594">http://www.paraview.org/Bug/bug_relationship_graph.php?bug_id=14594</a>).</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Question is: How do I know which algorithms will work with polyhedrons?</div></div>