Dear Yves, Thanks a lot for your answer, that's perfectly clear now.. and works!
One more question: working on triangulated (curved) surface in R^3, I am interested to evaluate the gradient of a fem function at some point of this curved mesh. When my mesh was flat I used to build a model and call the interpolation of "Grad_u" on my mesh at a point P which was inside of the mesh.
Now that the mesh is curved, it is more tricky to produce a point which is exactly on the curved mesh like, for instance, the center of a curved triangle. Here are my (I hope last) questions:
1) Is it possible to generate points inside of a curved convex cell described by a mesh? 2) How to interpolate the gradient at these points. Does the same procedure work even if the point is never exactly on the curved mesh ?
Thanks a lot for your work and Happy new Year !!! Best, Edouard. Le 29/12/2018 à 20:47, Yves Renard a écrit :
Dear Edouard, The point ordering is the same that the corresponding fem. You can see the dof ordering of fem in the page http://getfem.org/userdoc/appendixA.html And yes, of course, it is possible to also mesh curved surfaces in 3D. Best regards, Yves ----- Original Message ----- From: "EDOUARD OUDET" <[email protected]> To: "getfem-users" <[email protected]> Sent: Saturday, December 29, 2018 8:05:04 PM Subject: [Getfem-users] quadratic mesh, step 2 I answer to the first part of my question: curved mesh seem to be implemented regarding examples in the tests/meshes folder. Great!! My remaining questions are: 1) How/where is defined the ordering point sequence which defines a curved convex cell in a getfem-mesh file? 2) curved mesh seem to be implemented in 2D, 3D but is it also the case for surfaces (triangulation in 3D)? Thanks!
-- Edouard Oudet : http://www-ljk.imag.fr/membres/Edouard.Oudet/ IMAG - Bureau 164 700 avenue Centrale 38400 Saint Martin d'Hères +33 (0)4 57 42 17 71 (office LJK) +33 (0)4 79 68 82 06 (home)
