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<title>Gmsh: a three-dimensional finite element mesh generator with
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<h1 align="center">Gmsh: a three-dimensional finite element mesh
generator with built-in pre- and post-processing facilities</h1>
<p>
<h3 align="center">Christophe Geuzaine and Jean-Franois Remacle</h3>
<p>
<h3 align=center>Version 2.4.1, August 29 2009</h3>
<p>
<center>
  <a href="#Description">Description</a> |
  <a href="#Download"><strong>Download</strong></a> |
  <a href="#Authors">Authors and credits</a> |
  <a href="#Documentation">Documentation</a> |
  <a href="#Licensing">Licensing</a> |
  <a href="#Screenshots">Screenshots</a> |
  <a href="#Links">Links</a>
</center>

<h2><a name="Description"></a>Description</h2>

Gmsh is an automatic 3D finite element grid generator with a built-in
CAD engine and post-processor. Its design goal is to provide a simple
meshing tool for academic problems with parametric input and advanced
visualization capabilities.
<p>
Gmsh is built around four modules: geometry, mesh, solver and
post-processing. The specification of any input to these modules is
done either interactively using the graphical user interface or in
ASCII text files using Gmsh's own scripting language.
<p>
See the screencasts for a <a href="/gmsh/screencasts/">quick tour of
Gmsh's graphical user interface</a>, or the reference manual for a
more thorough <a href="/gmsh/doc/texinfo/gmsh.html#Overview">overview
of Gmsh's capabilities</a>.

<h2><a name="Download"></a>Download</h2>

Gmsh is distributed under the terms of
the <a href="http://www.gnu.org/copyleft/gpl.html">GNU General Public
License (GPL)</a>. Pre-compiled binaries are available for Windows (XP
or Vista), Linux (Intel, glibc 2.3) and Mac OS X (10.5,
Intel). Tutorial and demos files are included in all the archives.

<ul>
<li>
<span style="border: 1px dotted; padding: 3px;">
<strong>Current stable release</strong>:
<a href="/gmsh/bin/Windows/gmsh-2.4.1-Windows.zip"><strong>Windows</strong></a>,
    <a href="/gmsh/bin/Linux/gmsh-2.4.1-Linux.tgz"><strong>Linux</strong></a>,
<a href="/gmsh/bin/MacOSX/gmsh-2.4.1-MacOSX.dmg"><strong>Mac OS X</strong></a> and
<a href="/gmsh/src/gmsh-2.4.1-source.tgz"><strong>source code</strong></a>
</span>
<p>
<li>Experimental versions (these might be buggy, or might not even
launch: use at your own risk!):
<ul><li>automated nightly builds:
<a href="/gmsh/bin/Windows/gmsh-nightly-Windows.zip">Windows</a>
(<a href="/gmsh/bin/Windows/nightly.log">build log</a>),
<a href="/gmsh/bin/Linux/gmsh-nightly-Linux.tgz">Linux</a>
(<a href="/gmsh/bin/Linux/nightly.log">build log</a>),
<a href="/gmsh/bin/MacOSX/gmsh-nightly-MacOSX.dmg">Mac OS X</a>
(<a href="/gmsh/bin/MacOSX/nightly.log">build log</a>)
<li>nightly <a href="/gmsh/src/gmsh-nightly-source.tgz">cvs source
snapshot</a>
</ul>
<li>
Browse all versions: <a href="/gmsh/bin/">binaries</a>
and <a href="/gmsh/src/">sources</a>
</ul>

If you use Gmsh, we would appreciate if you could cite the following
reference in your work (books, articles, reports, etc.):
``<a href="gmsh_paper_preprint.pdf">C. Geuzaine and
J.-F. Remacle. <em>Gmsh: a three-dimensional finite element mesh
generator with built-in pre- and post-processing
facilities</em>. International Journal for Numerical Methods in
Engineering, Volume 79, Issue 11, pages 1309-1331, 2009</a>''.

<h2><a name="Authors"></a>Authors and credits</h2>

Gmsh is developed by Christophe Geuzaine
(<a href="http://www.ulg.ac.be/">University of Li&egrave;ge</a>) and
Jean-Franois Remacle (<a href="http://www.ucl.ac.be/">Catholic
University of Louvain</a>). The <a href="/gmsh/doc/CREDITS.txt">CREDITS</a>
file has more information.
<p>
Please use <a HREF="mailto:gmsh@geuz.org">gmsh@geuz.org</a> to send
questions or bug reports.

<h2><a name="Documentation"></a>Documentation</h2>

<ul>
  <li><a href="/gmsh/doc/texinfo/gmsh.html">Reference manual</a> 
      (also available in
      <a href="/gmsh/doc/texinfo/gmsh.pdf">PDF</a> or in
      <a href="/gmsh/doc/texinfo/gmsh.txt">plain text</a>)
  <li><a href="/gmsh/screencasts/">Screencasts</a> showing how to use
    the graphical user interface
  <li><a href="/gmsh/doc/FAQ.txt">Frequently asked questions (FAQ)</a>
  <li><a href="/gmsh/doc/VERSIONS.txt">Version history</a>
  <li>Mailing lists:
    <ul>
      <li><a href="/mailman/listinfo/gmsh/">gmsh</a> is the public
        mailing list for Gmsh users. You should send all questions,
        bug reports, requests or pleas for changes related to Gmsh to
        this list. The list is
        archived <a href="/pipermail/gmsh/">here</a>.
      <li><a href="/mailman/listinfo/gmsh-announce/">gmsh-announce</a>
        is a moderated (i.e. "read-only") list for announcements about
        significant Gmsh events. You should subscribe to this list to
        get information about software releases, important bug fixes
        and other Gmsh-specific news. The list is archived
        <a href="/pipermail/gmsh-announce/">here</a>.
    </ul>
  <li>Wiki: we need your help to build a <a href="/gmsh/wiki/FrontPage">library
       of examples</a>! (username: gmsh, password: wiki)
</ul>

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  <option value="/gmsh/doc/">Gmsh documentation
  <option value="/pipermail/gmsh">Gmsh mailing list archives
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<h2><a name="Licensing"></a>Licensing</h2>

Gmsh is copyright (C) 1997-2009 by C. Geuzaine and J.-F. Remacle and
is distributed under the terms of
the <a href="http://www.gnu.org/copyleft/gpl.html">GNU General Public
License (GPL)</a> (with an <a href="/gmsh/doc/LICENSE.txt">exception</a>
to allow for easier linking with external mesh generators).

<p>
In short, this means that everyone is free to use Gmsh and to
redistribute it on a free basis. Gmsh is not in the public domain; it
is copyrighted and there are restrictions on its distribution (see the
<a href="http://www.gnu.org/copyleft/gpl.html">license</a> and its
associated <a href="http://www.gnu.org/copyleft/gpl-faq.html">FAQ</a>).
For example, you cannot integrate this version of Gmsh (in full or in
parts) in any <em>closed-source</em> software you plan to distribute
(commercially or not).
<p>
If you want to integrate Gmsh into a closed-source software, or want
to sell a modified closed-source version of Gmsh, please contact us in
person. You can purchase a version of Gmsh under a different license,
with "no strings attached" (for example allowing you to take parts of
Gmsh and integrate them into your own proprietary code).

<h2><a name="Screenshots"></a>Screenshots</h2>

<a href="http://geuz.org/gmsh/gallery/screenshot.png"><img
src="http://geuz.org/gmsh/gallery/thumbnail.png" alt="Screenshot
thumbnail"></a>

<ul>
<li>Sample STEP/BREP models:
    <a href="/gmsh/gallery/bike.png">bike</a>,
    <a href="/gmsh/gallery/Zylkopf3D.png">zylkopf</a>,
    <a href="/gmsh/gallery/TapGeo.png">tap</a>,
    <a href="/gmsh/gallery/linkrods3Db.png">linkrods</a>,
    <a href="/gmsh/gallery/Block3D.png">block</a>,
    <a href="/gmsh/gallery/hammer.png">hammer</a>,
    <a href="/gmsh/gallery/propeller.png">propeller</a>,
    <a href="/gmsh/gallery/piston.png">piston</a>,
    <a href="/gmsh/gallery/pump.png">pump</a> (EDF R&amp;D).
<li>Native models: 
    <a href="/gmsh/gallery/MURUROA.png">ocean</a> (here is
    a <a href="http://perso.uclouvain.be/jonathan.lambrechts/gmsh_ocean">screencast</a>
    explaining how to create such a mesh),
    <a href="/gmsh/gallery/magnetron3.gif">magnetron 1</a>,
    <a href="/gmsh/gallery/magnetron4.gif">magnetron 2</a> (P. Lefvre),
    <a href="/gmsh/gallery/breaker.gif">circuit breaker</a> (S. K. Choi),
    <a href="/gmsh/gallery/machine.gif">electrical machine</a> (J. Gyselinck),
    <a href="/gmsh/gallery/tresse1.gif">braid 1</a>,
    <a href="/gmsh/gallery/tresse2.gif">braid 2</a> (D. Colignon).
<li>Mesh around an airplane:
    <a href="/gmsh/gallery/a319_4.png">A319 1</a>,
    <a href="/gmsh/gallery/a319_2.png">A319 2</a>.
<li>Structured vs. unstructured grids:
    <a href="/gmsh/gallery/spirale.gif">spirale</a>,
    <a href="/gmsh/gallery/piece1.gif">unstructured</a>, 
        <a href="/gmsh/gallery/piece2.gif">structured tet</a>, 
    <a href="/gmsh/gallery/piece3.gif">structured hex/pri</a>.
<li>Post-processing:
    <a href="/gmsh/gallery/f16_stream.jpg">F16 streamlines</a>,
    <a href="/gmsh/gallery/f18_stream.jpg">F18 streamlines</a>,
    <a href="/gmsh/gallery/pressure-ring.png">pressure ring</a>,
    <a href="/gmsh/gallery/boeing.jpg">Boing</a> (P. Geuzaine),
    <a href="/gmsh/gallery/blob.gif">post-pro</a>,
    <a href="/gmsh/gallery/contact.png">post-pro 2</a>,
    <a href="/gmsh/gallery/cmap.png">colormaps</a>.
<li>Miscellaneous features:
    <a href="/gmsh/gallery/lenna.gif">Lenna as background mesh</a>,
    <a href="/gmsh/gallery/spiranim.gif">animated cutting spiral</a>,
    <a href="/gmsh/gallery/select.png">selection</a>,
    <a href="/gmsh/gallery/runner.png">clipping</a>.
<li>Various screen captures:
    <a href="/gmsh/gallery/screenshot1.gif">magnetron</a>,
    <a href="/gmsh/gallery/screenshot2.gif">F16</a>,
    <a href="/gmsh/gallery/screenshot3.gif">electrical machine</a>,
    <a href="/gmsh/gallery/screenshot4.gif">neutron scattering</a>.
</ul>

<h2><a name="Links"></a>Links</h2>

<ul>
<li>Gmsh imports STEP, IGES and BREP files thanks
to <a href="http://www.opencascade.org">OpenCascade</a>.
<li>Gmsh interfaces the following additional external mesh
generators: <a href="http://www.hpfem.jku.at/netgen/">Netgen</a> from
Joachim Sch&ouml;berl
and <a href="http://tetgen.berlios.de/index.html">TetGen</a> from Hang
Si.
<li>Gmsh's high quality vector PostScript, PDF and SVG output is
produced by <a href="/gl2ps/">GL2PS</a>.
<li>Gmsh's cross-platform graphical user interface is based
on <a href="http://www.fltk.org/">FLTK</a>
and <a href="http://www.opengl.org/">OpenGL</a>.
<li>Make sure to also check out <a href="/getdp/">GetDP</a>, a rather
general finite element code that can be used right from Gmsh's
graphical user interface.
</ul>

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