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global_r.c -- global variables and their functions

Qhull uses a data structure, qhT, to store globally defined constants, lists, sets, and variables. It is passed as the first argument to most functions.

Copyright © 1995-2020 C.B. Barber

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Index to global_r.c and libqhull_r.h

• Qhull's global variables
• Global variable and initialization routines

»Qhull's global variables

• qh_version version string
• qh all global variables for qhull are in qh,qhmem, and qhstat
• QHULL_LIB_CHECK Check for compatible library
• qh constants configuration flags and constants for Qhull
• qh precision constants precision constants for Qhull
• qh internal constants internal constants for Qhull
• qh facet and vertex lists lists of facets and vertices
• qh global variables minimum and maximum distances, next visit ids, several flags, and other global variables.
• qh global sets global sets for merging, hashing, input, etc.
• qh global buffers buffers for matrix operations and input
• qh static variables static variables for individual functions

»Global variable and initialization routines

• qh_appendprint append output format to qh.PRINTout
• qh_checkflags check flags for multiple frontends to qhull
• qh_clear_outputflags clear output flags for QhullPoints
• qh_freebuffers free global memory buffers
• qh_freebuild free memory used by qh_initbuild and qh_buildhull
• qh_freeqhull free memory used by qhull
• qh_init_A called before error handling initialized
• qh_init_B called after points are defined
• qh_init_qhull_command build qh.qhull_command from argc/argv
• qh_initflags set flags and constants from command line
• qh_initqhull_buffers initialize global memory buffers
• qh_initqhull_globals initialize global variables
• qh_initqhull_mem initialize Qhull memory management
• qh_initqhull_outputflags initialize flags concerned with output
• qh_initqhull_start allocate qh_qh and call qh_initqhull_start2()
• qh_initqhull_start2 initialize default values at Qhull startup
• qh_initthresholds initialize 'Pdn' and 'PDn' thresholds
• qh_lib_check check for compatible Qhull library. Invoked by QHULL_LIB_CHECK at start of each program.
• qh_option append option description to qh.global_options
• qh_restore_qhull restores a previously saved qhull
• qh_save_qhull saves qhull for a later qh_restore_qhull()
• qh_strtol duplicates strtod() and strtol()
• qh_zero zeroes qhT before first use

Up: Home page for Qhull (local)
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Comments to: qhull@qhull.org
Created: May 2, 1997 --- Last modified: see top