166 lines
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166 lines
7.5 KiB
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<title>global.c -- global variables and their functions</title>
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<!-- Navigation links -->
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<p><a name="TOP"><b>Up:</b></a> <a
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href="http://www.qhull.org">Home page</a> for Qhull<br>
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<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual</a>: Table of Contents <br>
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<b>Up:</b> <a href="../../html/qh-quick.htm#programs">Programs</a>
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• <a href="../../html/qh-quick.htm#options">Options</a>
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• <a href="index.htm">Functions</a><br>
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<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
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<b>To:</b> <a href="qh-geom.htm">Geom</a> • <a href="qh-globa.htm#TOC">Global</a>
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<!-- Main text of document. -->
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<h2>global.c -- global variables and their functions</h2>
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<blockquote>
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<p>Qhull uses a global data structure, <tt>qh</tt>, to store
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globally defined constants, lists, sets, and variables. This
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allows multiple instances of Qhull to execute at the same time.
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The structure may be statically allocated or
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dynamically allocated with malloc(). See
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<a href="user.h#QHpointer">QHpointer</a>.
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</p>
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</blockquote>
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<p><b>Copyright © 1995-2015 C.B. Barber</b></p>
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<hr>
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<p><a href="#TOP">»</a> <a href="qh-geom.htm#TOC">Geom</a>
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<a name="TOC">•</a> <b>Global</b> •
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<a href="qh-io.htm#TOC">Io</a> • <a href="qh-mem.htm#TOC">Mem</a> •
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<a href="qh-merge.htm#TOC">Merge</a> • <a href="qh-poly.htm#TOC">Poly</a> •
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<a href="qh-qhull.htm#TOC">Qhull</a> • <a href="qh-set.htm#TOC">Set</a> •
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<a href="qh-stat.htm#TOC">Stat</a> • <a href="qh-user.htm#TOC">User</a> </p>
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<h3>Index to <a href="global.c">global.c</a> and
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<a href="libqhull.h">libqhull.h</a></h3>
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<ul>
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<li><a href="#ovar">Qhull's global variables</a> </li>
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<li><a href="#ofunc">Global variable and initialization
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routines</a> </li>
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</ul>
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<h3><a href="qh-globa.htm#TOC">»</a><a name="ovar">Qhull's global
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variables</a></h3>
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<ul>
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<li><a href=global.c#qh_version>qh_version</a> version string
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<li><a href="libqhull.h#qh">qh</a> all global variables for
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qhull are in <tt>qh,qhmem</tt>, and <tt>qhstat</tt></li>
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<li><a href="libqhull_r.h#qh">QHULL_LIB_CHECK</a> Check for compatible library</li>
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<li><a href="libqhull.h#qh-const">qh constants</a> configuration
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flags and constants for Qhull </li>
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<li><a href="libqhull.h#qh-prec">qh precision constants</a>
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precision constants for Qhull </li>
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<li><a href="libqhull.h#qh-codetern">qh internal constants</a>
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internal constants for Qhull </li>
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<li><a href="libqhull.h#qh-lists">qh facet and vertex lists</a>
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lists of facets and vertices </li>
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<li><a href="libqhull.h#qh-var">qh global variables</a> minimum
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and maximum distances, next visit ids, several flags, and
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other global variables. </li>
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<li><a href="libqhull.h#qh-set">qh global sets</a> global sets
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for merging, hashing, input, etc. </li>
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<li><a href="libqhull.h#qh-buf">qh global buffers</a> buffers
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for matrix operations and input </li>
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<li><a href="libqhull.h#qh-static">qh static variables</a>
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static variables for individual functions </li>
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</ul>
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<h3><a href="qh-globa.htm#TOC">»</a><a name="ofunc">Global variable and
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initialization routines</a></h3>
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<ul>
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<li><a href="global.c#appendprint">qh_appendprint</a> append
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output format to <tt>qh.PRINTout</tt> </li>
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<li><a href="global.c#freebuffers">qh_freebuffers</a> free
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global memory buffers </li>
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<li><a href="global.c#freeqhull">qh_freeqhull</a> free memory
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used by qhull </li>
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<li><a href="global.c#init_A">qh_init_A</a> called before
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error handling initialized </li>
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<li><a href="global.c#init_B">qh_init_B</a> called after
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points are defined </li>
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<li><a href="global.c#init_qhull_command">qh_init_qhull_command</a>
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build <tt>qh.qhull_command</tt> from <tt>argc/argv</tt></li>
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<li><a href="global.c#initflags">qh_initflags</a> set flags
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and constants from command line </li>
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<li><a href="global.c#initqhull_buffers">qh_initqhull_buffers</a>
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initialize global memory buffers </li>
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<li><a href="global.c#initqhull_globals">qh_initqhull_globals</a>
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initialize global variables </li>
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<li><a href="global.c#initqhull_mem">qh_initqhull_mem</a>
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initialize Qhull memory management </li>
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<li><a href="global.c#initqhull_start">qh_initqhull_start</a>
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allocate qh_qh and call qh_initqhull_start2()
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<li><a href="global.c#initqhull_start2">qh_initqhull_start2</a>
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initialize default values at Qhull startup </li>
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<li><a href="global.c#initthresholds">qh_initthresholds</a>
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initialize 'Pdn' and 'PDn' thresholds </li>
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<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>
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<li><a href="global.c#option">qh_option</a> append option
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description to <tt>qh.global_options</tt> </li>
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<li><a href="global.c#restore_qhull">qh_restore_qhull</a>
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restores a previously saved qhull </li>
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<li><a href="global.c#save_qhull">qh_save_qhull</a> saves
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qhull for a later qh_restore_qhull() </li>
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<li><a href="global.c#strtol">qh_strtol</a> duplicates
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strtod() and strtol() </li>
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</ul>
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<p><!-- Navigation links --> </p>
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<hr>
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<p><b>Up:</b>
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<a href="http://www.qhull.org">Home page for
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Qhull</a> <br>
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<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual: Table of Contents</a> <br>
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<b>Up:</b> <a href="../../html/qh-quick.htm#programs">Programs</a>
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• <a href="../../html/qh-quick.htm#options">Options</a>
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• <a href="../../html/qh-opto.htm#output">Output</a>
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• <a href="../../html/qh-optf.htm#format">Formats</a>
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• <a href="../../html/qh-optg.htm#geomview">Geomview</a>
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• <a href="../../html/qh-optp.htm#print">Print</a>
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• <a href="../../html/qh-optq.htm#qhull">Qhull</a>
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• <a href="../../html/qh-optc.htm#prec">Precision</a>
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• <a href="../../html/qh-optt.htm#trace">Trace</a>
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• <a href="index.htm">Functions</a><br>
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<b>Up:</b> <a href="../../html/qh-code.htm#TOC">Qhull code: Table of Contents</a> <br>
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<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
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<b>To:</b> <a href="qh-geom.htm">Geom</a> •
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<a href="qh-globa.htm">Global</a> • <a href="qh-io.htm">Io</a>
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• <a href="qh-mem.htm">Mem</a> • <a href="qh-merge.htm">Merge</a>
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• <a href="qh-poly.htm">Poly</a> • <a href="qh-qhull.htm#TOC">Qhull</a>
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• <a href="qh-set.htm">Set</a> • <a href="qh-stat.htm">Stat</a>
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• <a href="qh-user.htm">User</a><br>
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<p><!-- GC common information --> </p>
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<hr>
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<p><a href="http://www.geom.uiuc.edu/"><img
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src="../../html/qh--geom.gif" align="middle" width="40" height="40"></a><i>The
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Geometry Center Home Page </i></p>
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<p>Comments to: <a href=mailto:qhull@qhull.org>qhull@qhull.org</a>
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</a><br>
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Created: May 2, 1997 --- <!-- hhmts start --> Last modified: see top <!-- hhmts end --> </p>
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