FEM_TO_MESH
Convert finite element mesh data from FEM to MESH format {#fem_to_mesh-convert-finite-element-mesh-data-from-fem-to-mesh-format align="center"}
FEM_TO_MESH is a C++ program which reads a set of FEM files defining the node coordinates, boundary nodes, and elements of a finite element mesh, and rewrites the data as a MESH file.
The program can convert 2D meshes of triangles, or 3D meshes of tetrahedrons.
fem_to_mesh prefix
where prefix is the file name prefix, so that:
- prefix**_nodes.txt** is a file containing node coordinates;
- prefix**_boundary_node_mask.txt** is a file listing a "0" for each interior node and a "1" for each boundary node; (This file can be created by the triangulation_boundary_nodes or tet_mesh_boundary programs.)
- prefix**_elements.txt** is a file listing the nodes forming each element;
- prefix**.mesh** is the name of the MESH file to be created.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
FEM_TO_MESH is available in a C++ version and a FORTRAN90 version and a MATLAB version.
FEM_TO_TEC, a FORTRAN90 program which converts FEM models into TECPLOT ASCII files.
FEM2D, a data directory which contains examples of 2D FEM files, text files that describe a 2D finite element geometry and associated nodal values;
FEM3D, a data directory which contains examples of 3D FEM files, three text files that describe a 3D finite element geometry and associated nodal values.
ICE_TO_MESH, a C++ program which reads a NETCDF file containing an ICE dataset and rewrites the information as a MESH file.
MESH, a data directory which contains examples of MESH files, which can be used to define the geometry of a finite element mesh in 2D or 3D, using triangles, quadrilaterals, tetrahedrons or hexahedrons.
TET_MESH_BOUNDARY, a C++ program which returns the nodes and faces of the boundary of a tetrahedral mesh, which themselves form a 3D triangular mesh or "TRI_SURFACE".
TRIANGULATION_BOUNDARY_NODES, a C++ program which reads data defining a triangulation, determines which nodes lie on the boundary, and writes their coordinates to a file.
- Pascal Frey,
MEDIT: An interactive mesh visualization software,
Technical Report RT-0253,
Institut National de Recherche en Informatique et en Automatique,
03 December 2001.
- fem_to_mesh.cpp, the source code.
ELL is a 2D L-shaped region, with a grid of 65 nodes and 96 elements of order 3 triangles.
- ell_nodes.txt
- ell_elements.txt
- ell_elements.png, an image of the triangulation.
- ell_boundary_node_mask.txt
- ell.mesh, the MESH file.
P01 is 3D FEM data for a rectangular channel of dimensions 3x1x1 physical units, using 584 nodes and 2568 tetrahedral elements.
- p01_nodes.txt, defines the FEM nodes.
- p01_elements.txt, defines the FEM elements.
- p01.png, an image of the mesh.
- p01_boundary_node_mask.txt
- p01.mesh, the MESH file.
- MAIN is the main program for FEM_TO_MESH.
- CH_CAP capitalizes a single character.
- CH_EQI is true if two characters are equal, disregarding case.
- CH_TO_DIGIT returns the integer value of a base 10 digit.
- FILE_COLUMN_COUNT counts the columns in the first line of a file.
- FILE_ROW_COUNT counts the number of row records in a file.
- I4MAT_DATA_READ reads data from an I4MAT file.
- I4MAT_HEADER_READ reads the header from an I4MAT file.
- MESH_WRITE writes mesh data to a MESH file.
- R8MAT_DATA_READ reads the data from an R8MAT file.
- R8MAT_HEADER_READ reads the header from an R8MAT file.
- S_LEN_TRIM returns the length of a string to the last nonblank.
- S_TO_I4 reads an I4 from a string.
- S_TO_I4VEC reads an I4VEC from a string.
- S_TO_R8 reads an R8 from a string.
- S_TO_R8VEC reads an R8VEC from a string.
- S_WORD_COUNT counts the number of "words" in a string.
- TIMESTAMP prints the current YMDHMS date as a time stamp.
You can go up one level to the C++ source codes.
Last revised on 09 December 2010.