qhalf.c File Reference

#include "libqhull/libqhull.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>

Include dependency graph for qhalf.c:

Go to the source code of this file.

Functions
int	isatty (int)
int	main (int argc, char *argv[])

Variables
char	hidden_options [] =" d n v Qbb QbB Qf Qg Qm Qr QR Qv Qx Qz TR E V Fa FA FC FD FS Ft FV Gt Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 "
char	qh_prompt2 []
char	qh_prompt3 []
char	qh_prompta []
char	qh_promptb []
char	qh_promptc []
char	qh_promptd []
char	qh_prompte []

Function Documentation

isatty()

int isatty

(

int

)

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 252 of file qhalf.c.

Variable Documentation

hidden_options

char hidden_options[] =" d n v Qbb QbB Qf Qg Qm Qr QR Qv Qx Qz TR E V Fa FA FC FD FS Ft FV Gt Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 "

Definition at line 49 of file qhalf.c.

qh_prompt2

char qh_prompt2[]

Definition at line 171 of file qhalf.c.

qh_prompt3

char qh_prompt3[]

Initial value:

= "\n\
Qhull %s.\n\
Except for 'F.' and 'PG', upper_case options take an argument.\n\
\n\
 incidences     Geomview       mathematica    OFF_format     point_dual\n\
 summary        facet_dump\n\
\n\
 Fc_redundant   Fd_cdd_in      FF_dump_xridge FIDs           Fmerges\n\
 Fneighbors     FN_intersect   FOptions       Fp_coordinates FP_nearest\n\
 FQhalf         Fsummary       Fv_halfspace   FMaple         Fx_non_redundant\n\
\n\
 Gvertices      Gpoints        Gall_points    Gno_planes     Ginner\n\
 Gcentrums      Ghyperplanes   Gridges        Gouter         GDrop_dim\n\
\n\
 PArea_keep     Pdrop d0:0D0   Pgood          PFacet_area_keep\n\
 PGood_neighbors PMerge_keep   Poutput_forced Pprecision_not\n\
\n\
 Qbk:0Bk:0_drop Qcoplanar      QG_half_good   Qi_redundant   QJoggle\n\
 Qsearch_1st    Qtriangulate   QVertex_good\n\
\n\
 T4_trace       Tcheck_often   Tstatistics    Tverify        Tz_stdout\n\
 TFacet_log     TInput_file    TPoint_trace   TMerge_trace   TOutput_file\n\
 TWide_trace    TVertex_stop   TCone_stop\n\
\n\
 Angle_max      Centrum_size   Random_dist    Ucoplanar_max  Wide_outside\n\
"

Definition at line 210 of file qhalf.c.

qh_prompta

char qh_prompta[]

Initial value:

= "\n\
qhalf- compute the intersection of halfspaces about a point\n\
    http://www.qhull.org  %s\n\
\n\
input (stdin):\n\
    optional interior point: dimension, 1, coordinates\n\
    first lines: dimension+1 and number of halfspaces\n\
    other lines: halfspace coefficients followed by offset\n\
    comments:    start with a non-numeric character\n\
\n\
options:\n\
    Hn,n - specify coordinates of interior point\n\
    Qt   - triangulated output\n\
    QJ   - joggled input instead of merged facets\n\
    Qc   - keep coplanar halfspaces\n\
    Qi   - keep other redundant halfspaces\n\
\n\
Qhull control options:\n\
    QJn  - randomly joggle input in range [-n,n]\n\
%s%s%s%s"

Definition at line 51 of file qhalf.c.

qh_promptb

char qh_promptb[]

Initial value:

= "\
    Qbk:0Bk:0 - remove k-th coordinate from input\n\
    Qs   - search all halfspaces for the initial simplex\n\
    QGn  - print intersection if visible to halfspace n, -n for not\n\
    QVn  - print intersections for halfspace n, -n if not\n\
\n\
"

Definition at line 71 of file qhalf.c.

qh_promptc

char qh_promptc[]

Definition at line 78 of file qhalf.c.

qh_promptd

char qh_promptd[]

Initial value:

= "\
More formats:\n\
    Fc   - count plus redundant halfspaces for each intersection\n\
         -   Qc (default) for coplanar and Qi for other redundant\n\
    Fd   - use cdd format for input (homogeneous with offset first)\n\
    FF   - facet dump without ridges\n\
    FI   - ID of each intersection\n\
    Fm   - merge count for each intersection (511 max)\n\
    FM   - Maple output (dual convex hull)\n\
    Fn   - count plus neighboring intersections for each intersection\n\
    FN   - count plus intersections for each non-redundant halfspace\n\
    FO   - options and precision constants\n\
    Fp   - dim, count, and intersection coordinates\n\
    FP   - nearest halfspace and distance for each redundant halfspace\n\
    FQ   - command used for qhalf\n\
    Fs   - summary: #int (8), dim, #halfspaces, #non-redundant, #intersections\n\
                      for output: #non-redundant, #intersections, #coplanar\n\
                                  halfspaces, #non-simplicial intersections\n\
                    #real (2), max outer plane, min vertex\n\
    Fv   - count plus non-redundant halfspaces for each intersection\n\
    Fx   - non-redundant halfspaces\n\
\n\
"

Definition at line 112 of file qhalf.c.

qh_prompte

char qh_prompte[]

Initial value:

= "\
Geomview output (2-d, 3-d and 4-d; dual convex hull)\n\
    Ga   - all points (i.e., transformed halfspaces) as dots\n\
     Gp  -  coplanar points and vertices as radii\n\
     Gv  -  vertices (i.e., non-redundant halfspaces) as spheres\n\
    Gi   - inner planes (i.e., halfspace intersections) only\n\
     Gn  -  no planes\n\
     Go  -  outer planes only\n\
    Gc   - centrums\n\
    Gh   - hyperplane intersections\n\
    Gr   - ridges\n\
    GDn  - drop dimension n in 3-d and 4-d output\n\
\n\
Print options:\n\
    PAn  - keep n largest facets (i.e., intersections) by area\n\
    Pdk:n- drop facet if normal[k] <= n (default 0.0)\n\
    PDk:n- drop facet if normal[k] >= n\n\
    Pg   - print good facets (needs 'QGn' or 'QVn')\n\
    PFn  - keep facets whose area is at least n\n\
    PG   - print neighbors of good facets\n\
    PMn  - keep n facets with most merges\n\
    Po   - force output.  If error, output neighborhood of facet\n\
    Pp   - do not report precision problems\n\
\n\
    .    - list of all options\n\
    -    - one line descriptions of all options\n\
    -V   - version\n\
"

Definition at line 135 of file qhalf.c.