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<html>
<head>
<title>
STLA_IO - Read and Write Routines for ASCII STL 3D Graphics Files
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
STLA_IO <br> Read and Write Routines <br> ASCII STL 3D Graphics Files
</h1>
<hr>
<p>
<b>STLA_IO</b>
is a FORTRAN90 library which
reads or writes the 3D graphics information
stored in an ASCII STL (stereolithography) file.
</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>STLA_IO</b> is available in
<a href = "../../cpp_src/stla_io/stla_io.html">a C++ version</a> and
<a href = "../../f_src/stla_io/stla_io.html">a FORTRAN90 version</a> and
<a href = "../../m_src/stla_io/stla_io.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../cpp_src/ivcon/ivcon.html">
IVCON</a>,
a C++ program which
can convert graphics information between ASCII STL and other formats.
</p>
<p>
<a href = "../../f_src/ivread/ivread.html">
IVREAD</a>,
a FORTRAN90 program which
can convert graphics information between ASCII STL and other formats.
</p>
<p>
<a href = "../../data/stla/stla.html">
STLA</a>,
a data directory which
contains some examples of STLA 3D graphics files.
</p>
<p>
<a href = "../../m_src/stla_display/stla_display.html">
STLA_DISPLAY</a>,
a MATLAB program which
can read an ASCII STL file and display it on the screen.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
3D Systems, Inc,<br>
Stereolithography Interface Specification,<br>
October 1989.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "stla_io.f90">stla_io.f90</a>, the source code.
</li>
<li>
<a href = "stla_io.csh">stla_io.csh</a>,
commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "stla_io_prb.f90">stla_io_prb.f90</a>,
a sample calling program.
</li>
<li>
<a href = "stla_io_prb.csh">stla_io_prb.csh</a>,
commands to compile and run the sample program.
</li>
<li>
<a href = "../../data/stla/cube.stla">cube.stla</a>,
a simple STLA file that describes a cube.
</li>
<li>
<a href = "cube_new.stla">cube_new.stla</a>,
an STLA file describing a cube, written by STLA_WRITE.
</li>
<li>
<a href = "stla_io_prb_output.txt">stla_io_prb_output.txt</a>,
the output file.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>CH_CAP</b> capitalizes a single character.
</li>
<li>
<b>CH_EQI</b> is a case insensitive comparison of two characters for equality.
</li>
<li>
<b>CH_TO_DIGIT</b> returns the integer value of a base 10 digit.
</li>
<li>
<b>GET_UNIT</b> returns a free FORTRAN unit number.
</li>
<li>
<b>R8VEC_CROSS_3D</b> computes the cross product of two vectors in 3D.
</li>
<li>
<b>S_CAT</b> concatenates two strings to make a third string.
</li>
<li>
<b>S_EQI</b> is a case insensitive comparison of two strings for equality.
</li>
<li>
<b>S_TO_R8</b> reads an R8 from a string.
</li>
<li>
<b>STLA_CHECK</b> checks an ASCII StereoLithography file.
</li>
<li>
<b>STLA_FACE_NODE_PRINT</b> prints the node indices for each face.
</li>
<li>
<b>STLA_FACE_NORMAL_COMPUTE</b> computes normal vectors for an ASCII StereoLithography file.
</li>
<li>
<b>STLA_FACE_NORMAL_PRINT</b> prints the normal vectors.
</li>
<li>
<b>STLA_NODE_XYZ_PRINT</b> prints the node coordinates.
</li>
<li>
<b>STLA_READ</b> reads graphics information from an ASCII StereoLithography file.
</li>
<li>
<b>STLA_SIZE</b> determines sizes associated with an STLA file.
</li>
<li>
<b>STLA_SIZE_PRINT</b> prints sizes associated with an STLA file.
</li>
<li>
<b>STLA_WRITE</b> writes graphics information to an ASCII StereoLithography file.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
<li>
<b>WORD_NEXT_READ</b> "reads" words from a string, one at a time.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 15 February 2007.
</i>
<!-- John Burkardt -->
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