Christophe Geuzaine wrote: > Fabian Braennstroem wrote: > >> Hi Christophe, >> >> * On 20 Jul 2008 * Christophe Geuzaine wrote: >> >> >>> Fabian Braennstroem wrote: >>> >>>> Hi, >>>> >>>> I have a small problem, when importing an igs (exported by >>>> ICEM) geometry. Actually the import works well, >>>> but as soon as I save it as a geo file, I get a lot more >>>> points then in the igs file. I attach to snapshots. Do I >>>> do anything wrong? >>>> >>> Not really: the geo export is pretty much there for debugging purposes >>> only. The reason you get more points is probably that the straight lines >>> in the iges files are represented e.g. by splines instead of line >>> segments. >>> >>> Our goal is to mesh iges/step files directly, without converting them >>> into geo format first... >>> >> Did not know that; sounds nice. >> >> >>>> The view is an extraction of a simple diffuser, which I >>>> want to mesh with hexa elements. >>>> >>>> >>> ...but indeed, for this you would have to convert the iges file into geo >>> format, since we haven't (yet) interfaced the structured meshing commands >>> with general CAD files. >>> >> Sounds even better. >> >> >>> Why is having more control points a problem? >>> >> It is actually not a problem, but the geo file gets >> completely messy and I am not able to do the definition of >> the mesh by hand!? >> > > to generate hexas with Gmsh you'll currently need to define either > transfinite volumes (cf. demos/transfinite.geo) or use extrusion (sweeping). > > Forgot to say: thanks! Fabian
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