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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 MATLAB library which
includes routines to read or write the 3D graphics information
stored in an ASCII STL (stereolithography) file.
</p>
<p>
Especially if you are reading large ASCII STL files, you might want
to consider the <b>STLA_SIZE_FAST</b> and <b>STLA_READ_FAST</b>
routines, provided by Bill Seufzer of NASA Langley. These
will run more quickly in MATLAB than the routines
<b>STLA_SIZE</b> and <b>STLA_READ</b>.
</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 ASCII STL 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>
<p>
<a href = "../../m_src/stla_to_tri_surface/stla_to_tri_surface.html">
STLA_TO_TRI_SURFACE</a>,
a MATLAB program which
reads an ASCII STL file and extracts
the surface mesh data as a TRI_SURFACE dataset.
</p>
<p>
<a href = "../../m_src/tri_surface_to_stla/tri_surface_to_stla.html">
TRI_SURFACE_TO_STLA</a>,
a MATLAB program which
reads a TRI_SURFACE dataset and extracts
the surface mesh data as an ASCII STL file.
</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 = "ch_cap.m">ch_cap.m</a>
capitalizes a character.
</li>
<li>
<a href = "ch_eqi.m">ch_eqi.m</a>
case-insensitive comparison of two characters.
</li>
<li>
<a href = "ch_is_digit.m">ch_is_digit.m</a>
is true if a character represents a digit.
</li>
<li>
<a href = "ch_to_digit.m">ch_to_digit.m</a>
converts a character to the digit it represents.
</li>
<li>
<a href = "r8vec_cross_3d.m">r8vec_cross_3d.m</a>
computes the cross product of two vectors in 3D.
</li>
<li>
<a href = "s_cat.m">s_cat.m</a>
concatenates two strings to make a third string.
</li>
<li>
<a href = "s_eqi.m">s_eqi.m</a>
is a case insensitive comparison of two strings for equality.
</li>
<li>
<a href = "s_len_trim.m">s_len_trim.m</a>
returns the length of a string to the last nonblank.
</li>
<li>
<a href = "s_to_r8.m">s_to_r8.m</a>
reads an R8 from a string.
</li>
<li>
<a href = "stla_check.m">stla_check.m</a>
checks an ASCII STL file.
</li>
<li>
<a href = "stla_face_node_print.m">stla_face_node_print.m</a>
prints the nodes making up each face in an ASCII STL
file.
</li>
<li>
<a href = "stla_face_normal_compute.m">stla_face_normal_compute.m</a>
computes normal vectors for an ASCII STL file.
</li>
<li>
<a href = "stla_face_normal_print.m">stla_face_normal_print.m</a>
prints normal vectors for an ASCII STL file.
</li>
<li>
<a href = "stla_node_xyz_print.m">stla_node_xyz_print.m</a>
prints the node coordinates.
</li>
<li>
<a href = "stla_read.m">stla_read.m</a>
reads graphics information from an ASCII STL file.
</li>
<li>
<a href = "stla_read_fast.m">stla_read_fast.m</a>
reads graphics information from an ASCII STL file;
this routine should run much faster than <b>stla_read</b>.
</li>
<li>
<a href = "stla_size.m">stla_size.m</a>
determines sizes associated with an ASCII STL file.
</li>
<li>
<a href = "stla_size_fast.m">stla_size_fast.m</a>
determines sizes associated with an ASCII STL file;
this routine should run much faster than <b>stla_size</b>.
</li>
<li>
<a href = "stla_size_print.m">stla_size_print.m</a>
prints sizes associated with an ASCII STL file.
</li>
<li>
<a href = "stla_write.m">stla_write.m</a>
writes graphics information to an ASCII STL file.
</li>
<li>
<a href = "timestamp.m">timestamp.m</a>
prints the current YMDHMS date as a time stamp.
</li>
<li>
<a href = "word_next_read.m">word_next_read.m</a>
"reads" words from a string, one at a time.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "stla_io_test.m">stla_io_test.m</a>,
commands to run all the tests.
</li>
<li>
<a href = "stla_io_test01.m">stla_io_test01.m</a>,
tests STLA_CHECK.
</li>
<li>
<a href = "stla_io_test02.m">stla_io_test02.m</a>,
tests STLA_SIZE.
</li>
<li>
<a href = "stla_io_test03.m">stla_io_test03.m</a>,
tests STLA_READ.
</li>
<li>
<a href = "stla_io_test04.m">stla_io_test04.m</a>,
tests STLA_WRITE.
</li>
<li>
<a href = "stla_io_test05.m">stla_io_test05.m</a>,
tests STLA_FACE_NORMAL_COMPUTE.
</li>
<li>
<a href = "stla_io_test06.m">stla_io_test06.m</a>,
calls MATLAB's TRIMESH routine to make an image of
an ASCII STL file.
</li>
<li>
<a href = "stla_io_test07.m">stla_io_test07.m</a>,
compares the time required by STLA_SIZE and STLA_SIZE_FAST.
</li>
<li>
<a href = "stla_io_test08.m">stla_io_test08.m</a>,
compares the time required by STLA_READ and STLA_READ_FAST.
</li>
<li>
<a href = "../../data/stla/cube.stla">cube.stla</a>,
a simple ASCII STL file that describes a cube.
</li>
<li>
<a href = "cube_new.stla">cube_new.stla</a>,
an ASCII STL file describing a cube, written by STLA_WRITE.
</li>
<li>
<a href = "cube.png">cube.png</a>,
a <a href = "../../data/png/png.html">PNG</a> image of
the cube, create by MATLAB's TRIMESH routine.
</li>
<li>
<a href = "../../data/stla/sphere.stla">sphere.stla</a>,
an ASCII STL file that describes a sphere.
</li>
<li>
<a href = "../../data/stla/teapot.stla">teapot.stla</a>,
an ASCII STL file that describes a teapot.
</li>
<li>
<a href = "stla_io_test_output.txt">stla_io_test_output.txt</a>,
the output file.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 17 February 2007.
</i>
<!-- John Burkardt -->
</body>
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</html>