[Gmsh] Mapped meshing

[Atanas Pavlov]

Yes, I had not understand the concept of Transfinite grids, it is exactly
what I need. Thank you very much.
I have a few other questions, if someone happens to have an answer to them
:)

  1) I have not been able to find an Offset command in Gmsh (generate curve
which is offset from another curve by a given distance). Any suggestions?

  2) I am considering integrating Gmsh in a simple application, which
generates a certain geometrical configuration and meshes it. I have not been
able to find any example how to do that, my attempts to compile anything
against libGmsh.a (generated by make install-lib) have been fruitless ( I
cannot check the archive content with nm either, it seems to be archive made
of other archives and I do not know how to compile against it). When I try
to compile anything also against the full set of libraries created in the
lib build directory, I get a lot of error messages about unresolved
references. Is there any example anywhere, which shows how to use Gmsh API
to create and mesh geometries?

Thanks a lot,
Atanas

2008/4/21 Christophe Geuzaine <cgeuzaine at ulg.ac.be>:

> Atanas Pavlov wrote:
>
> > Hello,
> >
> > I am trying to create a mesh for an axisymmetric geometry, which is
> > relatively simple, defined by a few points, resp curves connecting them. I
> > would like, however, to perform mapped meshing where I partition the curves,
> > then use these partitions on 4-side surface regions to partition the
> > regions, and then revolve-extrude the mesh around the symmetry axis. As far
> > as I can see, the first step is currently not possible in GMSH, because for
> > surface mesh it can only generate triangle mesh (or extrude 1D mesh, which
> > however is not possible in this case). Is there any workaround? Is mapped
> > meshing planned to be implemented in GMSH, and for simple cases like that,
> > can it be a short term feasible task?
> >
> >
> Could you use a Transfinite grid like this?
>
> Point(1) = {0,0,0,0.1};
> Point(2) = {1,0,0,0.1};
> Point(3) = {0,1,0,0.1};
> Point(4) = {3,0,0,0.1};
> Point(5) = {3,3,0,0.1};
> Point(6) = {0,3,0,0.1};
> Line(1) = {3,6};
> Line(2) = {6,5};
> Line(3) = {5,4};
> Line(4) = {4,2};
> Circle(5) = {2,1,3};
> Line Loop(6) = {3,4,5,1,2};
> Plane Surface(7) = {6};
> Transfinite Line {1} = 20 Using Progression 1.2;
> Transfinite Line {4} = 20 Using Progression 1./1.2;
> Transfinite Line {3,2} = 10 Using Progression 1;
> Transfinite Line {5} = 19 Using Progression 1;
> Transfinite Surface {7} = {3,6,4,2} Alternated;
> Recombine Surface {7};
>
>
>
>  Cheers,
> > Atanas
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > 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<http://www.montefiore.ulg.ac.be/%7Egeuzaine>
>
>


-- 
Atanas Pavlov
Luitfriedstr. 18, München 80995
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