Hi, if you just want simulation results at defined points in space, you could also try to use interpolation in your postprocessing process.
HTH, Matthias > -----Ursprüngliche Nachricht----- > Von: David Colignon [mailto:[email protected]] > Gesendet: Freitag, 9. November 2012 16:00 > An: [email protected]; [email protected] > Betreff: Re: [Gmsh] Question about Gmsh > > > On 08/11/12 15:04, [email protected] wrote: > > > Hi, David, > > > > Thank you for the advice. > > > > The method did work for plane surface, but when the model contains > topography, problem comes again. I have to define the curved surface first > with GPS data, and then embed the detecting points in the surface. If I still > use the command Point | Line { expression-list } In Surface { expression };, > it > doesn't create a surface with topography. > > > > So the problem is the same as mentioned in my last email: If I have a large > number of control points(like GPS data), is there a simple way to create a > surface with topography using these points? > > Hi, > > do you know about the "Triangulate" plug-in ? > > Plugin(Triangulate) triangulates the points in the view `View', assuming that > all the points belong to a surface that can be projected one-to-one onto a > plane. > If `View' < 0, the plugin is run on the current view. > Plugin(Triangulate) creates one new view. > > and the corresponding "Tetrahedralize" plug-in ? > > Plugin(Tetrahedralize) tetrahedralizes the points in the view `View'. > If `View' < 0, the plugin is run on the current view. > Plugin(Tetrahedralize) creates one new view. > > > > > By the way, is there a command or combined technique to embed points in > a volume like the one for surface? > > No, it is much more difficult to implement in the 3D meshing algorithms than > in the 2D's > > Regards, > > Dave > > > > > > Best Regards, > > > > Jun Yang > > > > > > > >> -----Original E-mail----- > >> From: "David Colignon" <[email protected]> Sent Time: > >> 2012-11-8 17:40:25 > >> To: [email protected] > >> Cc: [email protected] > >> Subject: Re: [Gmsh] Question about Gmsh > >> > >> Hi, > >> > >> did you see or try this: > >> > >> https://geuz.org/gmsh/doc/texinfo/gmsh.html#Miscellaneous-mesh- > comman > >> ds > >> > >> Point | Line { expression-list } In Surface { expression }; > >> > >> Embed the point(s) or line(s) in the given surface. The surface > >> mesh will conform to the mesh of the point(s) or lines(s). Note that > embedded lines only work with the MeshAdapt 2-D algorithm. > >> > >> > >> Regards, > >> > >> Dave > >> > >> -- > >> David Colignon, Ph.D. > >> Collaborateur Logistique du F.R.S.-FNRS CÉCI - Consortium des > >> Équipements de Calcul Intensif ACE - Applied & Computational > >> Electromagnetics Université de Liège Sart-Tilman B28 10, Grande > >> Traverse > >> 4000 Liège - BELGIQUE > >> Tél: +32 (0)4 366 37 32 > >> WWW: http://www.ceci-hpc.be/ > >> Agenda: > >> > http://www.google.com/calendar/embed?src=david.colignon%40gmail.com > >> > >> On 08/11/12 05:56, [email protected] wrote: > >>> Dear Professor Christophe Geuzaine and Professor Jean-François > >>> Remacle, > >>> > >>> I'm a graduate student from University of Science and Technology of > China. My major is geophysics and I am now using Gmsh to build models for > modeling geoeletric field. > >>> > >>> These models are quite simple. The structure of the model is a cuboid > space with some simple bodies whose properties differ from the cuboid > space(We call them anomalies) inside it. Then when I try to specify large > amount of points that regularly spread on the surface of the model for > measuring the eletric potential, it seems that it's not going to be an easy > task. > I have to define all these points, then create line segments between every > two adjacent points, followed by forming line loops to define plane surfaces, > and finally put them into a part of the volume in order to execute the 3D > mesh. If I don't do it in this way, the produced grid will have nothing to do > with these deteting points. However, I need to make sure that these points > on the surface are nodes of the elements. > >>> > >>> So is there an easy technique to accomplish this operation? More > generally, is there an elementary classification for stand-alone control > points > which is going to be the nodes of the elements when execute the mesh > operation, like the ones I described above? I'm not sure if I miss some > important information in the Gmsh Reference Manual, but till now I can't find > a simple way. > >>> > >>> The attachment is the .geo file that describes the model I want to build. > Only the points, and lines are defined in the file. If these elementaries have > to be defined manually, thousands of operations are needed. > >>> > >>> The Gmsh with GUI is quite easy to operate. Thanks for offering us this > excellent software! > >>> > >>> Best Regards, > >>> Jun Yang > >>> University of Scinece and Technology of China Heifei,China > >>> Email: [email protected] > >>> > >>> > >>> > >>> _______________________________________________ > >>> gmsh mailing list > >>> [email protected] > >>> http://www.geuz.org/mailman/listinfo/gmsh > >>> > >> > > > > _____________________________________________________________________ ERBE Elektromedizin GmbH Firmensitz: 72072 Tuebingen Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede Registergericht: Stuttgart HRB 380137 _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
