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<title>global.c -- global variables and their functions</title>
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<h2>global.c -- global variables and their functions</h2>
<blockquote>
<p>Qhull uses a global data structure, <tt>qh</tt>, to store
globally defined constants, lists, sets, and variables. This
allows multiple instances of Qhull to execute at the same time.
The structure may be statically allocated or
dynamically allocated with malloc(). See
<a href="user.h#QHpointer">QHpointer</a>.
</p>
</blockquote>
<p><b>Copyright &copy; 1995-2015 C.B. Barber</b></p>
<hr>
<p><a href="#TOP">&#187;</a> <a href="qh-geom.htm#TOC">Geom</a>
<a name="TOC">&#149;</a> <b>Global</b> &#149;
<a href="qh-io.htm#TOC">Io</a> &#149; <a href="qh-mem.htm#TOC">Mem</a> &#149;
<a href="qh-merge.htm#TOC">Merge</a> &#149; <a href="qh-poly.htm#TOC">Poly</a> &#149;
<a href="qh-qhull.htm#TOC">Qhull</a> &#149; <a href="qh-set.htm#TOC">Set</a> &#149;
<a href="qh-stat.htm#TOC">Stat</a> &#149; <a href="qh-user.htm#TOC">User</a> </p>
<h3>Index to <a href="global.c">global.c</a> and
<a href="libqhull.h">libqhull.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.htm#TOC">&#187;</a><a name="ovar">Qhull's global
variables</a></h3>
<ul>
<li><a href=global.c#qh_version>qh_version</a> version string
<li><a href="libqhull.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.h#qh-const">qh constants</a> configuration
flags and constants for Qhull </li>
<li><a href="libqhull.h#qh-prec">qh precision constants</a>
precision constants for Qhull </li>
<li><a href="libqhull.h#qh-codetern">qh internal constants</a>
internal constants for Qhull </li>
<li><a href="libqhull.h#qh-lists">qh facet and vertex lists</a>
lists of facets and vertices </li>
<li><a href="libqhull.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.h#qh-set">qh global sets</a> global sets
for merging, hashing, input, etc. </li>
<li><a href="libqhull.h#qh-buf">qh global buffers</a> buffers
for matrix operations and input </li>
<li><a href="libqhull.h#qh-static">qh static variables</a>
static variables for individual functions </li>
</ul>
<h3><a href="qh-globa.htm#TOC">&#187;</a><a name="ofunc">Global variable and
initialization routines</a></h3>
<ul>
<li><a href="global.c#appendprint">qh_appendprint</a> append
output format to <tt>qh.PRINTout</tt> </li>
<li><a href="global.c#freebuffers">qh_freebuffers</a> free
global memory buffers </li>
<li><a href="global.c#freeqhull">qh_freeqhull</a> free memory
used by qhull </li>
<li><a href="global.c#init_A">qh_init_A</a> called before
error handling initialized </li>
<li><a href="global.c#init_B">qh_init_B</a> called after
points are defined </li>
<li><a href="global.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.c#initflags">qh_initflags</a> set flags
and constants from command line </li>
<li><a href="global.c#initqhull_buffers">qh_initqhull_buffers</a>
initialize global memory buffers </li>
<li><a href="global.c#initqhull_globals">qh_initqhull_globals</a>
initialize global variables </li>
<li><a href="global.c#initqhull_mem">qh_initqhull_mem</a>
initialize Qhull memory management </li>
<li><a href="global.c#initqhull_start">qh_initqhull_start</a>
allocate qh_qh and call qh_initqhull_start2()
<li><a href="global.c#initqhull_start2">qh_initqhull_start2</a>
initialize default values at Qhull startup </li>
<li><a href="global.c#initthresholds">qh_initthresholds</a>
initialize 'Pdn' and 'PDn' thresholds </li>
<li><a href="global.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.c#option">qh_option</a> append option
description to <tt>qh.global_options</tt> </li>
<li><a href="global.c#restore_qhull">qh_restore_qhull</a>
restores a previously saved qhull </li>
<li><a href="global.c#save_qhull">qh_save_qhull</a> saves
qhull for a later qh_restore_qhull() </li>
<li><a href="global.c#strtol">qh_strtol</a> duplicates
strtod() and strtol() </li>
</ul>
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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>
Created: May 2, 1997 --- <!-- hhmts start --> Last modified: see top <!-- hhmts end --> </p>
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