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<html>
<head>
<title>
TRIANGLE_IO - Read and Write TRIANGLE Files
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
TRIANGLE_IO <br> Read and Write TRIANGLE Files
</h1>
<hr>
<p>
<b>TRIANGLE_IO</b>
is a C++ library which
can read or write some simple versions of some of the files
used by Jonathan Shewchuk's triangle() program.
</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_IO</b> is available in
<a href = "../../c_src/triangle_io/triangle_io.html">a C version</a> and
<a href = "../../cpp_src/triangle_io/triangle_io.html">a C++ version</a> and
<a href = "../../f77_src/triangle_io/triangle_io.html">a FORTRAN77 version</a> and
<a href = "../../f_src/triangle_io/triangle_io.html">a FORTRAN90 version</a> and
<a href = "../../m_src/triangle_io/triangle_io.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/fem_to_triangle/fem_to_triangle.html">
FEM_TO_TRIANGLE</a>,
a C++ program which
reads FEM files defining a 2D mesh of triangles, namely
a file of node coordinates and a file of elements defined by
node indices, and creates a corresponding pair of node
and element files for use by Jonathan Shewchuk's triangle program.
</p>
<p>
<a href = "../../data/poly/poly.html">
POLY</a>,
a data directory which
contains a description and examples of the POLY file 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 which
contains examples of files used by the
<a href = "../../c_src/triangle/triangle.html">triangle</a> and
showme programs.
</p>
<p>
<a href = "../../cpp_src/triangle_to_fem/triangle_to_fem.html">
TRIANGLE_TO_FEM</a>,
a C++ 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.
</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>
<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_io.cpp">triangle_io.cpp</a>, the source code.
</li>
<li>
<a href = "triangle_io.hpp">triangle_io.hpp</a>, the include file.
</li>
<li>
<a href = "triangle_io.sh">triangle_io.sh</a>,
BASH commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "triangle_io_prb.cpp">triangle_io_prb.cpp</a>
a sample calling program.
</li>
<li>
<a href = "triangle_io_prb.sh">triangle_io_prb.sh</a>,
BASH commands to compile and run the sample program.
</li>
<li>
<a href = "triangle_io_prb_output.txt">triangle_io_prb_output.txt</a>,
the output file.
</li>
<li>
<a href = "example.ele">example.ele</a>,
an example ".ele" file created by the program.
</li>
<li>
<a href = "example.node">example.node</a>,
an example ".node" file created by the program.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>I4_MAX</b> returns the maximum of two I4's.
</li>
<li>
<b>I4_MIN</b> returns the minimum of two I4's.
</li>
<li>
<b>I4MAT_COPY</b> copies one I4MAT to another.
</li>
<li>
<b>I4MAT_TRANSPOSE_PRINT_SOME</b> prints some of an I4MAT, transposed.
</li>
<li>
<b>I4VEC_COPY</b> copies an I4VEC.
</li>
<li>
<b>R8MAT_COPY</b> copies one R8MAT to another.
</li>
<li>
<b>R8MAT_TRANSPOSE_PRINT_SOME</b> prints some of an R8MAT, transposed.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
<li>
<b>TRIANGLE_ELEMENT_DATA_EXAMPLE</b> returns the element information for the example.
</li>
<li>
<b>TRIANGLE_ELEMENT_DATA_READ</b> reads the header information from an element file.
</li>
<li>
<b>TRIANGLE_ELEMENT_SIZE_EXAMPLE</b> returns the element size information for the example.
</li>
<li>
<b>TRIANGLE_ELEMENT_SIZE_READ</b> reads the header information from an element file.
</li>
<li>
<b>TRIANGLE_ELEMENT_WRITE</b> writes a TRIANGLE ".ele" file.
</li>
<li>
<b>TRIANGLE_NODE_DATA_EXAMPLE</b> returns the node information for the example.
</li>
<li>
<b>TRIANGLE_NODE_HEADER_READ</b> reads the header information from a node file.
</li>
<li>
<b>TRIANGLE_NODE_SIZE_EXAMPLE</b> returns the sizes of node information for the example.
</li>
<li>
<b>TRIANGLE_NODE_SIZE_READ</b> reads the header information from a node file.
</li>
<li>
<b>TRIANGLE_NODE_WRITE</b> writes a TRIANGLE ".node" file.
</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 16 October 2014.
</i>
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