In such extreme cases I would precompute the desired mesh size constraints on a background mesh.
Christophe > On 26 Oct 2018, at 18:01, Max Orok <[email protected]> wrote: > > Hello Alessandro, > > I tried to add fields to an empty model using the attached program. > I think your main problem would be with the time needed to insert in a map. > > Here are some rough timings from adding the "Box" size field. > > 1 min - 50,000 > 4 min - 90,000 > 5 min - 100,000 > 6.5 min - 110,000 > 12 min - 150,000 > > For really large numbers (millions, etc.), you might need preallocation > instead of adding one-by-one. > I don't think this is possible with the current SDK. > The SDK C++ header's add function "only" has an int return value, so around 4 > billion is nominally the front-end limit. > > If the header was ever modified, I think the background meshes are tracked > with a pointer map (from BackgroundMeshManager.h): > > static std::map<GEntity *, BGMBase *> data; > > Using the max_size map method I got around 3.8e17. > The real number is probably much lower than that because of allocation > problems etc. > > Sincerely, > Max > > On Fri, Oct 26, 2018 at 6:01 AM, Alessandro Vicini > <[email protected]> wrote: > > > Hello Gmsh users, is there some limitation whatsoever to the number of fields > that can be defined for mesh size control? I think I might need a “huge” > number of fields for some automatic adaptive grid refinement… > > > > A. > > > > > > > _______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh > > > > > -- > Max Orok > Contractor > www.mevex.com > > > <bg-mesh-size.cpp>_______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh — Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine Free software: http://gmsh.info | http://getdp.info | http://onelab.info _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
