GMSH_IO
Read and Write GMSH Mesh files

GMSH_IO, a MATLAB library which can read and write the files used by the GMSH meshing program.

Licensing:

The computer code and data files made available on this web page are distributed under the GNU LGPL license.

Languages:

GMSH_IO is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

DOLFIN-CONVERT, 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.

FEM_TO_GMSH, 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.

GMSH, 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).

gmsh_io_test

GMSH_TO_FEM, 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.

MSH, a data directory of examples of MSH files, the native 3D mesh format used by Gmsh.

Reference:

1. Christophe Geuzaine, Jean-Francois Remacle,
   Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities,
   International Journal for Numerical Methods in Engineering,
   Volume 79, Number 11, pages 1309-1331, 2009.

Source Code:

• ch_cap.m returns the capitalized version of a character;
• ch_eqi.m returns TRUE if a two characters are equal (ignoring case);
• gmsh_data_read.m, reads data from a GMSH data file.
• gmsh_mesh1d_write.m, writes a 1D mesh as a GMSH data file.
• gmsh_mesh2d_element_data_exmple.m, sets element data for a 2D example.
• gmsh_mesh2d_element_size_example.m, sets element sizes for a 2D example.
• gmsh_mesh2d_node_data_exmple.m, sets node data for a 2D example.
• gmsh_mesh2d_node_size_example.m, sets node sizes for a 2D example.
• gmsh_mesh2d_write.m, writes a 2D mesh as a GMSH data file.
• gmsh_mesh3d_write.m, writes a 3D mesh as a GMSH data file.
• gmsh_size_read.m, reads sizes from a GMSH data file.
• i4mat_transpose_print.m, prints an I4MAT, transposed.
• i4mat_transpose_print_some.m, prints some of the transpose of an I4MAT.
• mesh_base_one.m adjusts a mesh to use 1-based indexing.
• r8mat_transpose_print.m, prints an R8MAT, transposed.
• r8mat_transpose_print_some.m, prints some of an R8MAT, transposed.
• s_begin.m, is TRUE if two strings match, up to the end of the shorter string, ignoring spaces and capitalization;
• s_len_trim.m, returns the length of a string to the last nonblank.
• timestamp.m, prints the current YMDHMS date as a time stamp.