Hello Christophe, I am currently seeking information about the algorithm used in gmsh. I had a look at your homepage but did not find anything. I found a couple of papers on the tetgen homepage explaining the algorithms they used, is there something similar available for gmsh??
kind regards Jonas Biehler On Tue 1/07/08 11:16 PM , Christophe Geuzaine [EMAIL PROTECTED] sent: > [EMAIL PROTECTED] wrote: > > Hello Christophe, > > > > > > yes I can send you the stl files with which the problem > occurs. Please find two stl files > > of the same geometry but different element sizes > attached to this email > > > Hi Jonas - The problem comes from the STL import: since there is no > > connectivity in STL files, Gmsh has to use a geometrical tolerance to > > determine when vertices are identical. > > > > The default tolerance is a bit to large in your case, resulting in nodes > > being merged that shouldn't have been. Add > > > > Geometry.Tolerance = 1.e-12; > > > > at the begining of your .geo file: it will decrease the tolerance and > > should fix the problem. > > > > > > > > > > > > > > kind regards > > > jonas biehler > > > > > > > > > > > > On Thu 19/06/08 6:12 PM , Christophe Geuzaine cgeuzaine > @ulg.ac.be sent: > >> [EMAIL PROTECTED] wrote: > >>> Hi there, > > >>> i am currently using gmsh to create 3d volume meshes > > >> from an stl file, which describes the surface. In > order to create meshes > >> with different mesh sizes i can create finer or > coarser surface meshes( > >> stl's) The problem is that gmsh does not work for some > mesh sizes > >>> e.g it works for 0.002 and 0.0022 but not for 0.0019 > or > >> 0.0021. > > >>> Has anybody had similar problems in the past ? Or > knows > >> a remedy?? > > >> > > >> > > >> Could you send me the files? I cannot reproduce this > problem with our > >> > > >> benchmark suite. > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >>> thanks for your help > > >>> cheers jonas > > >>> > > >>> _______________________________________________ > > >>> gmsh mailing list > > >>> [email protected] > >>> http://www.geuz.org/mailman/listinfo/gmsh > >>> > > >> > > >> > > >> > > >> > > >> -- > > >> > > >> 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
