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<html>
<head>
<title>
TRIANGLE_TO_FEM - Convert Node and Element Files from TRIANGLE to FEM Format.
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
TRIANGLE_TO_FEM <br> Convert Node and Element Files from TRIANGLE to FEM Format.
</h1>
<hr>
<p>
<b>TRIANGLE_TO_FEM</b>
is a C++ program which
reads a pair of node and element files created by the TRIANGLE program
and writes a corresponding pair of node and element files that correspond
to the FEM format.
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>triangle_to_fem</b> <i>prefix</i>
</blockquote>
where <i>prefix</i> is the common filename prefix so that:
<ul>
<li>
<i>prefix</i><b>.node</b> contains the coordinates of the nodes;
</li>
<li>
<i>prefix</i><b>.ele</b> contains the indices of nodes forming each
element.
</li>
<li>
<i>prefix</i><b>_nodes.txt</b> will be the FEM node file created by the program.
</li>
<li>
<i>prefix</i><b>_elements.txt</b> will be the FEM element file created by the program.
</li>
</ul>
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and 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>TRIANGLE_TO_FEM</b> is available in
<a href = "../../c_src/triangle_to_fem/triangle_to_fem.html">a C version</a> and
<a href = "../../cpp_src/triangle_to_fem/triangle_to_fem.html">a C++ version</a> and
<a href = "../../f77_src/triangle_to_fem/triangle_to_fem.html">a FORTRAN77 version</a> and
<a href = "../../f_src/triangle_to_fem/triangle_to_fem.html">a FORTRAN90 version</a> and
<a href = "../../m_src/triangle_to_fem/triangle_to_fem.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/fem_io/fem_io.html">
FEM_IO</a>,
a C++ library which
reads or writes node, element and data files defining a model
associated with the finite element method (FEM).
</p>
<p>
<a href = "../../data/fem2d/fem2d.html">
FEM2D</a>,
a data directory which
contains examples of 2D FEM files, a pair of files defining the coordinates
of nodes, and the nodes that form triangular elements.
</p>
<p>
<a href = "../../cpp_src/gmsh_to_fem/gmsh_to_fem.html">
GMSH_TO_FEM</a>,
a C++ 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 = "../../cpp_src/medit_to_fem/medit_to_fem.html">
MEDIT_TO_FEM</a>,
a C++ program which
reads a mesh file created by the MEDIT program
and writes a corresponding pair of node and element files that correspond
to the FEM format.
</p>
<p>
<a href = "../../c_src/showme/showme.html">
SHOWME</a>,
a C program which
can display the POLY files uses as input to <b>TRIANGLE</b>,
and the output files that define meshes and other objects.
</p>
<p>
<a href = "../../c_src/triangle/triangle.html">
TRIANGLE</a>,
a C program which
computes Voronoi diagrams and Delaunay triangulations,
and creates and manipulates files that can be displayed by <b>SHOWME</b>.
</p>
<p>
<a href = "../../m_src/triangle_display/triangle_display.html">
TRIANGLE_DISPLAY</a>,
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.
</p>
<p>
<a href = "../../data/triangle_files/triangle_files.html">
TRIANGLE_FILES</a>,
a data directory of examples of files used by the triangle and
showme programs.
</p>
<p>
<a href = "../../cpp_src/triangle_io/triangle_io.html">
TRIANGLE_IO</a>,
a C++ library which
can read or write node and element files created by the TRIANGLE program.
</p>
<p>
<a href = "../../cpp_src/triangle_to_medit/triangle_to_medit.html">
TRIANGLE_TO_MEDIT</a>,
a C++ program which reads the NODE and ELE files created by triangle() to
describe a triangular mesh, and writes a corresponding MESH file
for input to medit().
</p>
<p>
<a href = "../../cpp_src/triangle_to_xml/triangle_to_xml.html">
TRIANGLE_TO_XML</a>,
a C++ 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.
</p>
<p>
<a href = "../../py_src/xml_to_fem/xml_to_fem.html">
XML_TO_FEM</a>,
a Python program which
reads an XML file created by FENICS or DOLFIN, describing a mesh
in 1D, 2D, or 3D, and creates corresponding FEM files, namely,
a file of node coordinates, and a file of element connectivities.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
<a href = "http://www-2.cs.cmu.edu/~quake/triangle.html">
http://www-2.cs.cmu.edu/~quake/triangle.html</a>,
the TRIANGLE web site;
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "triangle_to_fem.cpp">triangle_to_fem.cpp</a>, the source code.
</li>
<li>
<a href = "triangle_to_fem.sh">triangle_to_fem.sh</a>,
BASH commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "ell.node">ell.node</a>,
a TRIANGLE node file.
</li>
<li>
<a href = "ell.ele">ell.ele</a>,
a TRIANGLE element file.
</li>
<li>
<a href = "ell_nodes.txt">ell_nodes.txt</a>,
the FEM node file created by the program.
</li>
<li>
<a href = "ell_elements.txt">ell_elements.txt</a>,
the FEM element file created by the program.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>MAIN</b> is the main program for TRIANGLE_TO_FEM.
</li>
<li>
<b>ELEMENT_DATA_READ</b> reads the header information from an element file.
</li>
<li>
<b>ELEMENT_SIZE_READ</b> reads the header information from an element file.
</li>
<li>
<b>I4MAT_WRITE</b> writes an I4MAT file with no header.
</li>
<li>
<b>NODE_HEADER_READ</b> reads the header information from a node file.
</li>
<li>
<b>NODE_SIZE_READ</b> reads the header information from a node file.
</li>
<li>
<b>R8MAT_WRITE</b> writes an R8MAT file.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../cpp_src.html">
the C++ source codes</a>.
</p>
<hr>
<i>
Last revised on 08 December 2010.
</i>
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