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<title>global_r.c -- global variables and their functions</title>
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<!-- Navigation links -->
<p><a name="TOP"><b>Up:</b></a> <a
href="http://www.qhull.org">Home page</a> for Qhull<br>
<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual</a>: Table of Contents <br>
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<!-- Main text of document. -->
<h2>global_r.c -- global variables and their functions</h2>
<blockquote>
<p>Qhull uses a data structure, <tt>qhT</tt>, to store
globally defined constants, lists, sets, and variables. It is passed as the
first argument to most functions.
</p>
</blockquote>
<p><b>Copyright © 1995-2015 C.B. Barber</b></p>
<hr>
<p><a href="#TOP">»</a> <a href="qh-geom_r.htm#TOC">Geom</a>
<a name="TOC">•</a> <b>Global</b> •
<a href="qh-io_r.htm#TOC">Io</a> • <a href="qh-mem_r.htm#TOC">Mem</a> •
<a href="qh-merge_r.htm#TOC">Merge</a> • <a href="qh-poly_r.htm#TOC">Poly</a> •
<a href="qh-qhull_r.htm#TOC">Qhull</a> • <a href="qh-set_r.htm#TOC">Set</a> •
<a href="qh-stat_r.htm#TOC">Stat</a> • <a href="qh-user_r.htm#TOC">User</a> </p>
<h3>Index to <a href="global_r.c">global_r.c</a> and
<a href="libqhull_r.h">libqhull_r.h</a></h3>
<ul>
<li><a href="#ovar">Qhull's global variables</a> </li>
<li><a href="#ofunc">Global variable and initialization
routines</a> </li>
</ul>
<h3><a href="qh-globa_r.htm#TOC">»</a><a name="ovar">Qhull's global
variables</a></h3>
<ul>
<li><a href=global_r.c#qh_version>qh_version</a> version string
<li><a href="libqhull_r.h#qh">qh</a> all global variables for
qhull are in <tt>qh,qhmem</tt>, and <tt>qhstat</tt></li>
<li><a href="libqhull_r.h#qh">QHULL_LIB_CHECK</a> Check for compatible library</li>
<li><a href="libqhull_r.h#qh-const">qh constants</a> configuration
flags and constants for Qhull </li>
<li><a href="libqhull_r.h#qh-prec">qh precision constants</a>
precision constants for Qhull </li>
<li><a href="libqhull_r.h#qh-codetern">qh internal constants</a>
internal constants for Qhull </li>
<li><a href="libqhull_r.h#qh-lists">qh facet and vertex lists</a>
lists of facets and vertices </li>
<li><a href="libqhull_r.h#qh-var">qh global variables</a> minimum
and maximum distances, next visit ids, several flags, and
other global variables. </li>
<li><a href="libqhull_r.h#qh-set">qh global sets</a> global sets
for merging, hashing, input, etc. </li>
<li><a href="libqhull_r.h#qh-buf">qh global buffers</a> buffers
for matrix operations and input </li>
<li><a href="libqhull_r.h#qh-static">qh static variables</a>
static variables for individual functions </li>
</ul>
<h3><a href="qh-globa_r.htm#TOC">»</a><a name="ofunc">Global variable and
initialization routines</a></h3>
<ul>
<li><a href="global_r.c#appendprint">qh_appendprint</a> append
output format to <tt>qh.PRINTout</tt> </li>
<li><a href="global_r.c#freebuffers">qh_freebuffers</a> free
global memory buffers </li>
<li><a href="global_r.c#freeqhull">qh_freeqhull</a> free memory
used by qhull </li>
<li><a href="global_r.c#init_A">qh_init_A</a> called before
error handling initialized </li>
<li><a href="global_r.c#init_B">qh_init_B</a> called after
points are defined </li>
<li><a href="global_r.c#init_qhull_command">qh_init_qhull_command</a>
build <tt>qh.qhull_command</tt> from <tt>argc/argv</tt></li>
<li><a href="global_r.c#initflags">qh_initflags</a> set flags
and constants from command line </li>
<li><a href="global_r.c#initqhull_buffers">qh_initqhull_buffers</a>
initialize global memory buffers </li>
<li><a href="global_r.c#initqhull_globals">qh_initqhull_globals</a>
initialize global variables </li>
<li><a href="global_r.c#initqhull_mem">qh_initqhull_mem</a>
initialize Qhull memory management </li>
<li><a href="global_r.c#initqhull_start">qh_initqhull_start</a>
allocate qh_qh and call qh_initqhull_start2()
<li><a href="global_r.c#initqhull_start2">qh_initqhull_start2</a>
initialize default values at Qhull startup </li>
<li><a href="global_r.c#initthresholds">qh_initthresholds</a>
initialize 'Pdn' and 'PDn' thresholds </li>
<li><a href="global_r.c#lib_check">qh_lib_check</a> check for compatible Qhull library. Invoked by QHULL_LIB_CHECK at start of each program.</li>
<li><a href="global_r.c#option">qh_option</a> append option
description to <tt>qh.global_options</tt> </li>
<li><a href="global_r.c#restore_qhull">qh_restore_qhull</a>
restores a previously saved qhull </li>
<li><a href="global_r.c#save_qhull">qh_save_qhull</a> saves
qhull for a later qh_restore_qhull() </li>
<li><a href="global_r.c#strtol">qh_strtol</a> duplicates
strtod() and strtol() </li>
<li><a href="global_r.c#zero">qh_zero</a> zeroes qhT before first use</li>
</ul>
<p><!-- Navigation links --> </p>
<hr>
<p><b>Up:</b>
<a href="http://www.qhull.org">Home page for
Qhull</a> <br>
<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual: Table of Contents</a> <br>
<b>Up:</b> <a href="../../html/qh-quick.htm#programs">Programs</a>
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• <a href="../../html/qh-optc.htm#prec">Precision</a>
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• <a href="index.htm">Functions</a><br>
<b>Up:</b> <a href="../../html/qh-code.htm#TOC">Qhull code: Table of Contents</a> <br>
<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
<b>To:</b> <a href="qh-geom_r.htm">Geom</a> •
<a href="qh-globa_r.htm">Global</a> • <a href="qh-io_r.htm">Io</a>
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• <a href="qh-poly_r.htm">Poly</a> • <a href="qh-qhull_r.htm#TOC">Qhull</a>
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• <a href="qh-user_r.htm">User</a><br>
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<p><a href="http://www.geom.uiuc.edu/"><img
src="../../html/qh--geom.gif" align="middle" width="40" height="40"></a><i>The
Geometry Center Home Page </i></p>
<p>Comments to: <a href=mailto:qhull@qhull.org>qhull@qhull.org</a>
</a><br>
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