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<html>
<head>
<title>
GMSH_IO - Read and Write GMSH Mesh files
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
GMSH_IO <br> Read and Write GMSH Mesh files
</h1>
<hr>
<p>
<b>GMSH_IO</b>
is a MATLAB library which
can read and write the files used by the GMSH meshing program.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files made available on this
web page are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>GMSH_IO</b> is available in
<a href = "../../c_src/gmsh_io/gmsh_io.html">a C version</a> and
<a href = "../../cpp_src/gmsh_io/gmsh_io.html">a C++ version</a> and
<a href = "../../f77_src/gmsh_io/gmsh_io.html">a FORTRAN77 version</a> and
<a href = "../../f_src/gmsh_io/gmsh_io.html">a FORTRAN90 version</a> and
<a href = "../../m_src/gmsh_io/gmsh_io.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../py_src/dolfin-convert/dolfin-convert.html">
DOLFIN-CONVERT</a>,
a Python program which
can convert a mesh file from Gmsh, MEDIT, METIS or SCOTCH format to an
XML format suitable for use by DOLFIN or FENICS,
by Anders Logg.
</p>
<p>
<a href = "../../m_src/fem_to_gmsh/fem_to_gmsh.html">
FEM_TO_GMSH</a>,
a MATLAB program which
reads FEM files definining a 1D, 2D or 3D mesh, namely
a file of node coordinates and a file of elements defined by
node indices, and creates a Gmsh mesh file.
</p>
<p>
<a href = "../../examples/gmsh/gmsh.html">
GMSH</a>,
examples which
illustrate the use of the Gmsh program,
a 1D, 2D or 3D mesh generator that can create meshes
suitable for use by the finite element method (FEM).
</p>
<p>
<a href = "../../m_src/gmsh_to_fem/gmsh_to_fem.html">
GMSH_TO_FEM</a>,
a MATLAB program which
reads a mesh data file created by the GMSH program
and writes a pair of node and element files that correspond
to the FEM format.
</p>
<p>
<a href = "../../data/msh/msh.html">
MSH</a>,
a data directory of examples of MSH files,
the native 3D mesh format used by Gmsh.
</p>
<p>
<a href = "../../examples/tethex/tethex.html">
TETHEX</a>,
examples which
illustrate the use of TETHEX,
a C++ program which
can read a Gmsh file defining a mesh of triangles or tetrahedrons,
and subdivide the mesh into quadrilaterals or hexahedrons, which
are suitable for use by the DEALII finite element program,
by Mikhail Artemiev.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Christophe Geuzaine, Jean-Francois Remacle,<br>
Gmsh: a three-dimensional finite element mesh generator with
built-in pre- and post-processing facilities,<br>
International Journal for Numerical Methods in Engineering,<br>
Volume 79, Number 11, pages 1309-1331, 2009.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "ch_cap.m">ch_cap.m</a>
returns the capitalized version of a character;
</li>
<li>
<a href = "ch_eqi.m">ch_eqi.m</a>
returns TRUE if a two characters are equal (ignoring case);
</li>
<li>
<a href = "gmsh_data_read.m">gmsh_data_read.m</a>,
reads data from a GMSH data file.
</li>
<li>
<a href = "gmsh_mesh1d_write.m">gmsh_mesh1d_write.m</a>,
writes a 1D mesh as a GMSH data file.
</li>
<li>
<a href = "gmsh_mesh2d_element_data_example.m">gmsh_mesh2d_element_data_exmple.m</a>,
sets element data for a 2D example.
</li>
<li>
<a href = "gmsh_mesh2d_element_size_example.m">gmsh_mesh2d_element_size_example.m</a>,
sets element sizes for a 2D example.
</li>
<li>
<a href = "gmsh_mesh2d_node_data_example.m">gmsh_mesh2d_node_data_exmple.m</a>,
sets node data for a 2D example.
</li>
<li>
<a href = "gmsh_mesh2d_node_size_example.m">gmsh_mesh2d_node_size_example.m</a>,
sets node sizes for a 2D example.
</li>
<li>
<a href = "gmsh_mesh2d_write.m">gmsh_mesh2d_write.m</a>,
writes a 2D mesh as a GMSH data file.
</li>
<li>
<a href = "gmsh_mesh3d_write.m">gmsh_mesh3d_write.m</a>,
writes a 3D mesh as a GMSH data file.
</li>
<li>
<a href = "gmsh_size_read.m">gmsh_size_read.m</a>,
reads sizes from a GMSH data file.
</li>
<li>
<a href = "i4mat_transpose_print.m">i4mat_transpose_print.m</a>,
prints an I4MAT, transposed.
</li>
<li>
<a href = "i4mat_transpose_print_some.m">i4mat_transpose_print_some.m</a>,
prints some of the transpose of an I4MAT.
</li>
<li>
<a href = "mesh_base_one.m">mesh_base_one.m</a>
adjusts a mesh to use 1-based indexing.
</li>
<li>
<a href = "r8mat_transpose_print.m">r8mat_transpose_print.m</a>,
prints an R8MAT, transposed.
</li>
<li>
<a href = "r8mat_transpose_print_some.m">r8mat_transpose_print_some.m</a>,
prints some of an R8MAT, transposed.
</li>
<li>
<a href = "s_begin.m">s_begin.m</a>,
is TRUE if two strings match, up to the end of the shorter string,
ignoring spaces and capitalization;
</li>
<li>
<a href = "s_len_trim.m">s_len_trim.m</a>,
returns the length of a string to the last nonblank.
</li>
<li>
<a href = "timestamp.m">timestamp.m</a>,
prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "gmsh_io_test.m">gmsh_io_test.m</a>
calls all the tests.
</li>
<li>
<a href = "gmsh_io_test01.m">gmsh_io_test01.m</a>
writes sample data to a file.
</li>
<li>
<a href = "gmsh_io_test02.m">gmsh_io_test02.m</a>
reads data from a file.
</li>
<li>
<a href = "gmsh_io_test_output.txt">gmsh_io_test_output.txt</a>,
the output file.
</li>
<li>
<a href = "example_2d.msh">example_2d.msh</a>,
the example data file created by the program.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 23 October 2014.
</i>
<!-- John Burkardt -->
</body>
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</html>