TRIANGLE_TO_MEDIT
Convert TRIANGLE Node and Element Files to MEDIT Mesh File.

TRIANGLE_TO_MEDIT is a FORTRAN77 program which reads a pair of node and element files created by the TRIANGLE program and writes a corresponding mesh file suitable for viewing with the MEDIT program.

Usage:

triangle_to_medit prefix

• prefix.node contains the coordinates of the nodes;
• prefix.ele contains the indices of nodes forming each element.
• prefix.mesh will be the MEDIT Mesh file created by the program.

Licensing:

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

Languages:

TRIANGLE_TO_MEDIT is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

FEM_TO_MEDIT, a FORTRAN77 program which reads a pair of FEM files defining node coordinates and elements, and creates a corresponding MEDIT mesh file.

MEDIT, a data directory which contains examples of MEDIT 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.

MEDIT_IO, a FORTRAN77 library which can read or write MEDIT mesh files.

POLY, a data directory which contains a description and examples of the POLY file format.

SHOWME, a C program which can display the POLY files uses as input to TRIANGLE, and the output files that define meshes and other objects.

TRIANGLE, a C program which computes Voronoi diagrams and Delaunay triangulations, and creates and manipulates files that can be displayed by SHOWME.

TRIANGLE_DISPLAY, a MATLAB program which displays the nodes and elements of a triangulation on the MATLAB graphics screen, assuming the data has been stored in NODE and ELE files by the TRIANGLE program.

TRIANGLE_FILES, a data directory of examples of files used by the triangle and showme programs.

TRIANGLE_IO, a FORTRAN77 library which can read or write node and element files created by the TRIANGLE program.

TRIANGLE_TO_FEM, a FORTRAN77 program which reads the NODE and ELE files created by TRIANGLE to describe a triangular mesh, and writes a corresponding pair of node and element files in the 2D FEM format.

TRIANGLE_TO_XML, a FORTRAN77 program which reads the NODE and ELE files created by triangle() to describe a triangular mesh in 2D, and writes out a corresponding XML mesh file for use by DOLFIN or FENICS.

Reference:

1. Pascal Frey,
   MEDIT: An interactive mesh visualization software,
   Technical Report RT-0253,
   Institut National de Recherche en Informatique et en Automatique,
   03 December 2001.

Source Code:

• triangle_to_medit.f, the source code.
• triangle_to_medit.sh, BASH commands to compile the source code.

Examples and Tests:

• ell.node, a TRIANGLE node file.
• ell.ele, a TRIANGLE element file.
• ell.mesh, a MEDIT mesh file created by the program.

List of Routines:

• MAIN is the main program for TRIANGLE_TO_MEDIT.
• CH_CAP capitalizes a single character.
• CH_EQI is a case insensitive comparison of two characters for equality.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• GET_UNIT returns a free FORTRAN unit number.
• MESH_WRITE writes sizes and data to a MESH file.
• 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.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• TRIANGLE_ELEMENT_DATA_READ reads the data from an element file.
• TRIANGLE_ELEMENT_SIZE_READ reads the header information from an element file.
• TRIANGLE_NODE_DATA_READ reads the data from a node file.
• TRIANGLE_NODE_SIZE_READ reads the header information from a node file.

You can go up one level to the FORTRAN77 source codes.