On 27 Sep 2013, at 17:58, Christophe Geuzaine <[email protected]> wrote:
> > On 17 Sep 2013, at 16:12, Michael Scheerer <[email protected]> > wrote: > >> Dear Prof. Christophe Geuzaine, >> >> I'm Michael Scheerer and we meet us during the last Gmesh workshop. I've a >> short question about parametric nodes (instead of normal nodes). >> Is there any documentation about? It would be very help full. I've seen, >> that in available Gmesh importer source code of scientists is only a "not in >> the spec, not supported" exception, if a msh file contains parametric nodes >> stuff. >> > > Hi Michael, > > There's no documentation yet. Currently the parametric information is stored > like this: > > node_num x y z entity_id < dimension parameter ... > > > If entity_id == 0, no dimension and no parameters are given (there's no > parametric info) > > If entity_id != 0, the next integer is the dimension of the entity (== the > number of parameters that follow), followed by the parameters. > PS: this describes the scheme in the forthcoming MSH3 format. In MSH2, 'entity_id' and 'dimension' are swapped, and parametric coordinates are not saved if dimension==3. > >> Another question is about mixed elements. Performance-wise it would be >> helpful, if we could use non curved elements in cases, that there are nearly >> no differences between straight looking curved elements and possible non >> curved “replacement” elements. Can you verify the statement, that such a >> replacement is impossible, because of the fact, that if once one element is >> curved, all other must be curved too, because of a domino effect? > > It is indeed, unless we allow non-conformal meshes. > > Cheers, > > Christophe > >> >> Best regards, >> Michael Scheerer >> >> ---------------------------------------------------- >> Dipl.-Ing. Michael Scheerer >> TU Darmstadt, Department of Mechanical Engineering Chair of Fluid Dynamics >> Petersenstr. 30, 64287 Darmstadt, Germany >> Phone: ++ 49 (0)6151-16-70960 >> E-Mail: [email protected] >> Home-Page: http://www.fdy.tu-darmstadt.de/ >> >> > > -- > Prof. Christophe Geuzaine > University of Liege, Electrical Engineering and Computer Science > http://www.montefiore.ulg.ac.be/~geuzaine > > > -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
