[Gmsh] handling stp file (example attached)

[Sangpil Yoon]

 Oh....Thanks for your input....
i thought i read all options in the manual, but clearly i did not.

"Geometry.OCCSewFaces=1" worked partially.....
in some other tests, i still have duplicated nodes..

my question now is that how to use "Coherence Mesh"

i now know "Coherence" only works for generic .geo file.

once i generate mesh, though, if i have duplicate nodes, i should be able
to clear it with  "Coherence Mesh" command.

Could you please make some comments on it?

how about all gmsh experts here?
is there someone who has some experience on the issue?

as always thank YOU very much well in advance.


On Fri, Feb 17, 2012 at 12:31 AM, Christophe Geuzaine
<cgeuzaine at ulg.ac.be>wrote:

>
> Hi,
>
> "Coherence" only applies to native .geo models. Geometry.OCCSewFaces seems
> to repair your open cascade model:
>
> =====
> Mesh.CharacteristicLengthFactor=0.25;
> Mesh.Algorithm=1; // 2D mesh algorithm  (1) MeshAdapt (default)(5)
> Delaunay (6) Frontal
> Mesh.ElementOrder=1; // 1=linear elements, N (<6) = elements of higher
> order
> Geometry.OCCSewFaces = 1;
>
> Merge "Volume1.STEP";
> =====
>
>
>
> On 16 Feb 2012, at 23:54, Sangpil Yoon wrote:
>
> > Dear Gmsh experts;
> >
> >
> > previous post was a kind of general question....
> >
> > here i attached a .STEP and .geo file
> >
> > i did the following in command line
> >
> >
> > > gmsh test.geo -2 -format msh -o test.msh
> >
> >
> > the geometry is pretty simple; a cylinder shape on one side of a box.
> >
> > you will see duplicate nodes are there.....because there ARE duplicate
> lines and points.
> >
> > did I do something wrong in using .geo file?
> >
> > Or, do i need to do something before exporting .STEP file?
> >
> >
> > any comments are welcome.
> >
> >
> > NOTE: If i do the same thing in the following manner, no duplicate nodes
> are found.
> >
> > 1. read .STEP file
> > 2. save it as .geo file
> > 3. add one line 'Coherence' at the end of .geo file
> > 4. do mesh
> >
> > i strongly believe I am not properly using .geo file or command.....
> >
> > <test.zip>_______________________________________________
> > gmsh mailing list
> > gmsh at geuz.org
> > 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
>
>
>
>
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