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<h1 class="short">Gmsh</h1>
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<h1>A three-dimensional finite element mesh generator with built-in pre- and
post-processing facilities <img class="title"
src="gallery/gmsh_title.png" alt=""></h1>
<h4>Christophe Geuzaine and Jean-François Remacle</h4>
<div id="toc">
<a href="#Download">Download</a>
| <a href="#Documentation">Documentation</a>
| <a href="#Licensing">Licensing</a>
| <a href="#Screenshots">Screenshots</a>
| <a href="#Links">Links</a>
| <a href="#References">References</a>
| <a href="https://www.twitter.com/OnelabModels"><img class="social"
src="gallery/twitter.png" alt="twitter"></a>
</div>
<p>
Gmsh is an open source 3D finite element mesh generator with a built-in CAD
engine and post-processor. Its design goal is to provide a fast, light and
user-friendly meshing tool with parametric input and advanced visualization
capabilities. 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, in ASCII text files using
Gmsh's own scripting language (<code>.geo</code> files), or using the C++, C,
Python or Julia Application Programming Interface (API).
</p>
<p>
See this <a href="doc/course/general_overview.pdf">general presentation</a> for
a high-level overview of Gmsh and recent developments,
the <a href="screencasts/">screencasts</a> for a quick tour of Gmsh's graphical
user interface, and the <a href="doc/texinfo/gmsh.html">reference manual</a> for
a more thorough overview of
Gmsh's <a href="doc/texinfo/gmsh.html#Overview">capabilities</a>,
some <a href="doc/texinfo/gmsh.html#Frequently-asked-questions">frequently asked
questions</a> and the documentation of
the <a href="doc/texinfo/gmsh.html#Gmsh-API">C++, C, Python and Julia API</a>.
</p>
<p>
The <a href="https://gitlab.onelab.info/gmsh/gmsh/">source code repository</a>
contains many examples written using both the built-in script language and the
API (see e.g. the
<a href="https://gitlab.onelab.info/gmsh/gmsh/tree/master/tutorials">tutorials</a>
and the additional
<a href="https://gitlab.onelab.info/gmsh/gmsh/tree/master/examples">examples</a>).
</p>
<h2><a name="Download"></a>Download</h2>
<p>
Gmsh is distributed under the terms of the <a href="LICENSE.txt">GNU General
Public License (GPL)</a>:
</p>
<ul>
<li>
<div class="highlight">
Current stable release (version 4.10.2, 13 May 2022):
<ul>
<li>Download Gmsh for
<a href="bin/Windows/gmsh-4.10.2-Windows64.zip">Windows</a>,
<a href="bin/Linux/gmsh-4.10.2-Linux64.tgz">Linux</a> or
<a href="bin/MacOSX/gmsh-4.10.2-MacOSX.dmg">macOS</a> <a href="#1"><sup>*</sup></a>
<li>Download the <a href="src/gmsh-4.10.2-source.tgz">source code</a>
<li>Download the Software Development Kit (SDK) for
<a href="bin/Windows/gmsh-4.10.2-Windows64-sdk.zip">Windows</a>,
<a href="bin/Linux/gmsh-4.10.2-Linux64-sdk.tgz">Linux</a> or
<a href="bin/MacOSX/gmsh-4.10.2-MacOSX-sdk.tgz">macOS</a> <a href="#1"><sup>*</sup></a>
<li>Download both Gmsh and the SDK with pip: '<code>pip install --upgrade
<a href="https://pypi.org/project/gmsh/">gmsh</a></code>'
</ul>
</div>
<p>
<em>Make sure to read
the <a href="doc/texinfo/gmsh.html#Tutorial">tutorials</a> before
sending questions or bug reports.</em>
</p>
<li>Development version:
<ul>
<li>Download the latest automatic Gmsh snapshot for
<a href="bin/Windows/gmsh-git-Windows64.zip">Windows</a>,
<a href="bin/Linux/gmsh-git-Linux64.tgz">Linux</a> or
<a href="bin/MacOSX/gmsh-git-MacOSX.dmg">macOS</a> <a href="#1"><sup>*</sup></a>
<li>Download the latest automatic <a href="src/gmsh-git-source.tgz">source
code</a> snapshot
<li>Download the latest automatic SDK snapshot for
<a href="bin/Windows/gmsh-git-Windows64-sdk.zip">Windows</a>,
<a href="bin/Linux/gmsh-git-Linux64-sdk.tgz">Linux</a> or
<a href="bin/MacOSX/gmsh-git-MacOSX-sdk.tgz">macOS</a> <a href="#1"><sup>*</sup></a>
<li>Access the Git repository: '<code>git clone
<a href="https://gitlab.onelab.info/gmsh/gmsh.git">https://gitlab.onelab.info/gmsh/gmsh.git</a></code>'
<li>Download the latest automatic snapshot of both Gmsh and the SDK with
pip: '<code>pip install -i https://gmsh.info/python-packages --force-reinstall
--no-cache-dir gmsh-dev</code>' (on Linux systems without X windows, use
<code>gmsh-nox-dev</code> instead of <code>gmsh-dev</code>)
</ul>
<p> </p>
<li>All versions: <a href="bin/">binaries</a>
and <a href="src/">sources</a>
</ul>
<p>
If you use Gmsh please cite the following reference in your work (books,
articles, reports, etc.): <a href="doc/preprints/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 79(11), pp. 1309-1331, 2009</a>. You can also
cite additional references for <a href="#References">specific features and
algorithms</a>.
</p>
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<div class="small">
<a name="1"><sup>*</sup></a> Binary releases require Windows 10, Linux with
glibc ≥ 2.24, or macOS ≥ 10.15
</div>
<h2><a name="Documentation"></a>Documentation</h2>
<ul>
<li><a href="doc/course/general_overview.pdf">General presentation</a> with
high-level overview of Gmsh and recent developments
<li><a href="doc/texinfo/gmsh.html">Gmsh reference manual (stable release)</a>
(also available in
<a href="doc/texinfo/gmsh.pdf">PDF</a> and in
<a href="doc/texinfo/gmsh.txt">plain text</a>)
<li><a href="dev/doc/texinfo/gmsh.html">Gmsh reference manual (development version)</a>
(also available in
<a href="dev/doc/texinfo/gmsh.pdf">PDF</a> and in
<a href="dev/doc/texinfo/gmsh.txt">plain text</a>)
<li><a href="screencasts/">Screencasts</a> showing how to use
the graphical user interface
<li><a href="https://gitlab.onelab.info/gmsh/gmsh">Gitlab development site</a> with a
<a href="https://gitlab.onelab.info/gmsh/gmsh/wikis/home">wiki</a>,
<a href="https://gitlab.onelab.info/gmsh/gmsh/commits/master">time line</a>
of changes and the <a href="https://gitlab.onelab.info/gmsh/gmsh/issues">bug
tracking</a> database
<li><a href="https://gitlab.onelab.info/gmsh/gmsh/blob/master/CHANGELOG.txt">Changelog</a>
</ul>
<p>
Please report all issues
on <a href="https://gitlab.onelab.info/gmsh/gmsh/issues"
><code>https://gitlab.onelab.info/gmsh/gmsh/issues</code></a>.
</p>
<h2><a name="Licensing"></a>Licensing</h2>
<p>
Gmsh is copyright (C) 1997-2022 by
<a href="http://people.montefiore.ulg.ac.be/geuzaine">C. Geuzaine</a> and
<a href="http://perso.uclouvain.be/jean-francois.remacle/">J.-F. Remacle</a>
(see the <a href="CREDITS.txt">CREDITS</a> file for more information) andis distributed under the terms of
the <a href="LICENSE.txt">GNU General Public License
(GPL)</a> (version 2 or later, with an exception to allow for easier
linking with external libraries).
</p>
<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 license and the
related <a href="https://www.gnu.org/copyleft/gpl-faq.html">frequently asked
questions</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). If you want to integrate parts of Gmsh into a
closed-source software, or want to sell a modified closed-source version of
Gmsh, you will need to obtain a commercial license: please
<a href="http://www.montefiore.ulg.ac.be/~geuzaine">contact us</a>
for details.
</p>
<h2><a name="Screenshots"></a>Screenshots</h2>
<p>
These are two screenshots of the Gmsh user interface, with either the light or
dark user interface theme. See the <a href="http://onelab.info">ONELAB</a> web
site for more.
</p>
<p>
<a href="gallery/screenshot.png">
<img class="screenshot" src="gallery/thumbnail.png"
alt="screenshot">
</a>
<a href="gallery/screenshot2.png">
<img class="screenshot" src="gallery/thumbnail2.png"
alt="screenshot">
</a>
</p>
<h2><a name="Links"></a>Links</h2>
<ul>
<li>Gmsh uses <a href="http://www.opencascade.org">OpenCascade</a> for
constructive geometry features, and interfaces the optional external mesh
and mesh adaptation librairies <a href="http://ngsolve.org/">Netgen</a> and
<a href="https://www.mmgtools.org/">Mmg3d</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>Gmsh's high quality vector PostScript, PDF and SVG output is produced
by <a href="http://geuz.org/gl2ps/">GL2PS</a>.
<li>Gmsh implements a <a href="http://onelab.info">ONELAB</a> server to drive
external solvers such as the open source finite element
solver <a href="https://getdp.info">GetDP</a>. Gmsh and GetDP are bundled in
the ONELAB app for
<a href="https://itunes.apple.com/us/app/onelab/id845930897">iPhone, iPad</a> and
<a href="https://play.google.com/store/apps/details?id=org.geuz.onelab">Android</a>
devices.
<!-- li>We organized the <a href="http://tetrahedron.montefiore.ulg.ac.be">fifth
Tetrahedron</a> workshop in Liège on July 4-5 2016. -->
</ul>
<h2><a name="References"></a>References</h2>
<div class="small">
Gmsh
<ul class="small">
<li>C. Geuzaine and
J.-F. Remacle. <em><a href="doc/preprints/gmsh_paper_preprint.pdf">Gmsh: a
three-dimensional finite element mesh generator with built-in pre- and post-processing facilities</a></em>. International Journal for Numerical
Methods in Engineering 79(11), pp. 1309-1331, 2009.
</li>
</ul>
Cross-patch and STL meshing (Compounds)
<ul class="small">
<li>J.-F. Remacle, C. Geuzaine, G. Compère and
E. Marchandise. <em><a href="doc/preprints/gmsh_stl_preprint.pdf">High-quality
surface remeshing using harmonic maps</a></em>. International Journal for
Numerical Methods in Engineering 83(4), pp. 403-425, 2010.
<li>E. Marchandise, C. Carton de Wiart, W. G. Vos, C. Geuzaine and
J.-F. Remacle. <em><a href="doc/preprints/gmsh_stl2_preprint.pdf">High
quality surface remeshing using harmonic maps. Part II: surfaces with high
genus and of large aspect ratio</a></em>. International Journal for Numerical
Methods in Engineering 86(11), pp. 1303-1321, 2011.
<li>E. Marchandise, J.-F. Remacle and
C. Geuzaine. <em><a href="doc/preprints/gmsh_stl3_preprint.pdf">Optimal
parametrizations for surface remeshing</a></em>. Engineering with
Computers, December 2012, pp. 1-20.
</ul>
Quad meshing
<ul class="small">
<li>
J.-F. Remacle, J. Lambrechts, B. Seny, E. Marchandise, A. Johnen and
C. Geuzaine. <em><a href="doc/preprints/gmsh_quad_preprint.pdf">Blossom-Quad:
a non-uniform quadrilateral mesh generator using a minimum cost perfect
matching algorithm</a></em>. International Journal for Numerical Methods
in Engineering 89, pp. 1102-1119, 2012.
<li>J.-F. Remacle, F. Henrotte, T. Carrier-Baudouin, E. Béchet,
E. Marchandise, C. Geuzaine and
T. Mouton. <em><a href="doc/preprints/gmsh_quad2_preprint.pdf">A frontal
Delaunay quad mesh generator using the L∞ norm</a></em>.
International Journal for Numerical Methods in Engineering, 94(5),
pp. 494-512, 2013.
</ul>
High-order meshing
<ul class="small">
<li>A. Johnen, J.-F. Remacle and
C. Geuzaine. <em><a href="doc/preprints/gmsh_curved_preprint.pdf">Geometric
validity of curvilinear finite elements</a></em>. Journal of
Computational Physics 233, pp. 359-372, 2013.
<li>A. Johnen, J.-F. Remacle and
C. Geuzaine. <em><a href="doc/preprints/gmsh_curved2_preprint.pdf">Geometric
validity of high-Order triangular finite elements</a></em>. Engineering
with Computers 30 (3), pp. 375-382, 2014.
<li>T. Toulorge, C. Geuzaine, J.-F. Remacle,
J. Lambrechts. <em><a href="doc/preprints/gmsh_untangling_preprint.pdf">Robust
untangling of curvilinear meshes</a></em>. Journal of Computational
Physics 254, pp. 8-26, 2013.
</ul>
High-order visualization
<ul class="small">
<li>J.-F. Remacle, N. Chevaugeon, E. Marchandise and
C. Geuzaine. <em><a href="doc/preprints/gmsh_visu_preprint.pdf">Efficient
visualization of high-order finite elements</a></em>. International Journal
for Numerical Methods in Engineering 69(4), pp. 750-771, 2007.
</ul>
Homology solver
<ul class="small">
<li>M. Pellikka, S. Suuriniemi, L. Kettunen and
C. Geuzaine. <em><a href="doc/preprints/gmsh_homology_preprint.pdf">Homology
and cohomology computation in finite element modeling</a></em>. SIAM
Journal on Scientific Computing 35(5), pp. 1195-1214, 2013.
</ul>
<!--
Ocean meshing
<ul class="small">
<li>J. Lambrechts, R. Comblen, V. Legat, C. Geuzaine and
J.-F. Remacle. <em><a href="doc/preprints/gmsh_ocean_preprint.pdf">Multiscale
mesh generation on the sphere</a></em>. Ocean Dynamics, 58, pp. 461-473, 2008.
</ul>
Biomedical meshing
<ul class="small">
<li>E. Marchandise, G. Compère, M. Willemet, G. Bricteux, C. Geuzaine and
J-F Remacle. <em><a href="doc/preprints/gmsh_bio_preprint.pdf">Quality
meshing based on STL triangulations for biomedical simulations</a></em>.
International Journal for Numerical Methods in Biomedical Engineering
26(7), pp. 876-889, 2010.
<li>E. Marchandise, P. Crosetto, C. Geuzaine, J.-F. Remacle and
E. Sauvage. <em><a href="doc/preprints/gmsh_bio2_preprint.pdf">Quality
open source mesh generation for cardiovascular flow simulations</a></em>,
in Modelling Physiological Flow, Springer Series on Modeling, Simulation
and Applications (Editors: D. Ambrosi, A. Quarteroni,
G. Rozza). Springer-Verlag, Berlin Heidelberg, 2011.
<li>E. Marchandise, C. Geuzaine and
J.-F. Remacle. <em><a href="doc/preprints/gmsh_bio3_preprint.pdf">Cardiovascular
and lung mesh generation based on centerlines</a></em>. International
Journal for Numerical Methods in Biomedical Engineering, submitted,
2012.
</ul>
-->
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