AFAI, rotations should not give rise to singularities in the jacobian. In fact, these orderings are equivalents as you state, they give the same normals following the "right-hand rule".
On Mon, 2016-11-14 at 11:04 +0100, Nan Li wrote: > Hello everyone, > > > I met a problem about the node ordering. I use typical 4 nodes > rectangle element and I find in some region of my mesh the element is > not ordering by the typical style > 3-----------2 > | | > | | > | | > 0-----------1 > but > 2-----------1 > | | > | | > | | > 3-----------0. > This leads to singularity of my Jacobian matrix. > For example, element 2358 (2225 2226 2235 2234) in the document .msh. > > > I have checked the normal direction of my surface and there is no > problem. > > > Thank you very much. > > > Li Nan > Doctorante > Laboratoire Roberval > Université de Technologie de Compiègne, France > Email: [email protected] > _______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
