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Diffstat (limited to 'xs/src/qhull/src/qconvex/qconvex_r.c')
| -rw-r--r-- | xs/src/qhull/src/qconvex/qconvex_r.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/xs/src/qhull/src/qconvex/qconvex_r.c b/xs/src/qhull/src/qconvex/qconvex_r.c new file mode 100644 index 000000000..abf68ce37 --- /dev/null +++ b/xs/src/qhull/src/qconvex/qconvex_r.c @@ -0,0 +1,328 @@ +/*<html><pre> -<a href="../libqhull/qh-qhull.htm" + >-------------------------------</a><a name="TOP">-</a> + + qconvex.c + compute convex hulls using qhull + + see unix.c for full interface + + Copyright (c) 1993-2015, The Geometry Center +*/ + +#include "libqhull_r/libqhull_r.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <math.h> + +#if __cplusplus +extern "C" { + int isatty(int); +} + +#elif _MSC_VER +#include <io.h> +#define isatty _isatty +/* int _isatty(int); */ + +#else +int isatty(int); /* returns 1 if stdin is a tty + if "Undefined symbol" this can be deleted along with call in main() */ +#endif + +/*-<a href="../libqhull/qh-qhull.htm#TOC" + >-------------------------------</a><a name="prompt">-</a> + + qh_prompt + long prompt for qconvex + + notes: + restricted version of libqhull.c + + see: + concise prompt below +*/ + +/* duplicated in qconvex.htm */ +char hidden_options[]=" d v H Qbb Qf Qg Qm Qr Qu Qv Qx Qz TR E V Fp Gt Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 "; + +char qh_prompta[]= "\n\ +qconvex- compute the convex hull\n\ + http://www.qhull.org %s\n\ +\n\ +input (stdin):\n\ + first lines: dimension and number of points (or vice-versa).\n\ + other lines: point coordinates, best if one point per line\n\ + comments: start with a non-numeric character\n\ +\n\ +options:\n\ + Qt - triangulated output\n\ + QJ - joggled input instead of merged facets\n\ + Qc - keep coplanar points with nearest facet\n\ + Qi - keep interior points with nearest facet\n\ +\n\ +Qhull control options:\n\ + Qbk:n - scale coord k so that low bound is n\n\ + QBk:n - scale coord k so that upper bound is n (QBk is %2.2g)\n\ + QbB - scale input to unit cube centered at the origin\n\ + Qbk:0Bk:0 - remove k-th coordinate from input\n\ + QJn - randomly joggle input in range [-n,n]\n\ + QRn - random rotation (n=seed, n=0 time, n=-1 time/no rotate)\n\ +%s%s%s%s"; /* split up qh_prompt for Visual C++ */ +char qh_promptb[]= "\ + Qs - search all points for the initial simplex\n\ + QGn - good facet if visible from point n, -n for not visible\n\ + QVn - good facet if it includes point n, -n if not\n\ +\n\ +"; +char qh_promptc[]= "\ +Trace options:\n\ + T4 - trace at level n, 4=all, 5=mem/gauss, -1= events\n\ + Tc - check frequently during execution\n\ + Ts - print statistics\n\ + Tv - verify result: structure, convexity, and point inclusion\n\ + Tz - send all output to stdout\n\ + TFn - report summary when n or more facets created\n\ + TI file - input data from file, no spaces or single quotes\n\ + TO file - output results to file, may be enclosed in single quotes\n\ + TPn - turn on tracing when point n added to hull\n\ + TMn - turn on tracing at merge n\n\ + TWn - trace merge facets when width > n\n\ + TVn - stop qhull after adding point n, -n for before (see TCn)\n\ + TCn - stop qhull after building cone for point n (see TVn)\n\ +\n\ +Precision options:\n\ + Cn - radius of centrum (roundoff added). Merge facets if non-convex\n\ + An - cosine of maximum angle. Merge facets if cosine > n or non-convex\n\ + C-0 roundoff, A-0.99/C-0.01 pre-merge, A0.99/C0.01 post-merge\n\ + Rn - randomly perturb computations by a factor of [1-n,1+n]\n\ + Un - max distance below plane for a new, coplanar point\n\ + Wn - min facet width for outside point (before roundoff)\n\ +\n\ +Output formats (may be combined; if none, produces a summary to stdout):\n\ + f - facet dump\n\ + G - Geomview output (see below)\n\ + i - vertices incident to each facet\n\ + m - Mathematica output (2-d and 3-d)\n\ + n - normals with offsets\n\ + o - OFF file format (dim, points and facets; Voronoi regions)\n\ + p - point coordinates \n\ + s - summary (stderr)\n\ +\n\ +"; +char qh_promptd[]= "\ +More formats:\n\ + Fa - area for each facet\n\ + FA - compute total area and volume for option 's'\n\ + Fc - count plus coplanar points for each facet\n\ + use 'Qc' (default) for coplanar and 'Qi' for interior\n\ + FC - centrum for each facet\n\ + Fd - use cdd format for input (homogeneous with offset first)\n\ + FD - use cdd format for numeric output (offset first)\n\ + FF - facet dump without ridges\n\ + Fi - inner plane for each facet\n\ + FI - ID for each facet\n\ + Fm - merge count for each facet (511 max)\n\ + Fn - count plus neighboring facets for each facet\n\ + FN - count plus neighboring facets for each point\n\ + Fo - outer plane (or max_outside) for each facet\n\ + FO - options and precision constants\n\ + FP - nearest vertex for each coplanar point\n\ + FQ - command used for qconvex\n\ + Fs - summary: #int (8), dimension, #points, tot vertices, tot facets,\n\ + for output: #vertices, #facets,\n\ + #coplanar points, #non-simplicial facets\n\ + #real (2), max outer plane, min vertex\n\ + FS - sizes: #int (0) \n\ + #real (2) tot area, tot volume\n\ + Ft - triangulation with centrums for non-simplicial facets (OFF format)\n\ + Fv - count plus vertices for each facet\n\ + FV - average of vertices (a feasible point for 'H')\n\ + Fx - extreme points (in order for 2-d)\n\ +\n\ +"; +char qh_prompte[]= "\ +Geomview output (2-d, 3-d, and 4-d)\n\ + Ga - all points as dots\n\ + Gp - coplanar points and vertices as radii\n\ + Gv - vertices as spheres\n\ + Gi - inner planes 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 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\ +"; +/* for opts, don't assign 'e' or 'E' to a flag (already used for exponent) */ + +/*-<a href="../libqhull/qh-qhull.htm#TOC" + >-------------------------------</a><a name="prompt2">-</a> + + qh_prompt2 + synopsis for qhull +*/ +char qh_prompt2[]= "\n\ +qconvex- compute the convex hull. Qhull %s\n\ + input (stdin): dimension, number of points, point coordinates\n\ + comments start with a non-numeric character\n\ +\n\ +options (qconvex.htm):\n\ + Qt - triangulated output\n\ + QJ - joggled input instead of merged facets\n\ + Tv - verify result: structure, convexity, and point inclusion\n\ + . - concise list of all options\n\ + - - one-line description of all options\n\ + -V - version\n\ +\n\ +output options (subset):\n\ + s - summary of results (default)\n\ + i - vertices incident to each facet\n\ + n - normals with offsets\n\ + p - vertex coordinates (includes coplanar points if 'Qc')\n\ + Fx - extreme points (convex hull vertices)\n\ + FA - report total area and volume\n\ + FS - compute total area and volume\n\ + o - OFF format (dim, n, points, facets)\n\ + G - Geomview output (2-d, 3-d, and 4-d)\n\ + m - Mathematica output (2-d and 3-d)\n\ + QVn - print facets that include point n, -n if not\n\ + TO file- output results to file, may be enclosed in single quotes\n\ +\n\ +examples:\n\ + rbox c D2 | qconvex s n rbox c D2 | qconvex i\n\ + rbox c D2 | qconvex o rbox 1000 s | qconvex s Tv FA\n\ + rbox c d D2 | qconvex s Qc Fx rbox y 1000 W0 | qconvex s n\n\ + rbox y 1000 W0 | qconvex s QJ rbox d G1 D12 | qconvex QR0 FA Pp\n\ + rbox c D7 | qconvex FA TF1000\n\ +\n\ +"; +/* for opts, don't assign 'e' or 'E' to a flag (already used for exponent) */ + +/*-<a href="../libqhull/qh-qhull.htm#TOC" + >-------------------------------</a><a name="prompt3">-</a> + + qh_prompt3 + concise prompt for qhull +*/ +char qh_prompt3[]= "\n\ +Qhull %s.\n\ +Except for 'F.' and 'PG', upper-case options take an argument.\n\ +\n\ + incidences mathematica normals OFF_format points\n\ + summary facet_dump\n\ +\n\ + Farea FArea_total Fcoplanars FCentrums Fd_cdd_in\n\ + FD_cdd_out FFacet_xridge Finner FIDs Fmerges\n\ + Fneighbors FNeigh_vertex Fouter FOptions FPoint_near\n\ + FQhull Fsummary FSize Fvertices FVertex_ave\n\ + Fxtremes FMaple\n\ +\n\ + Gvertices Gpoints Gall_points Gno_planes Ginner\n\ + Gcentrums Ghyperplanes Gridges Gouter GDrop_dim\n\ +\n\ + PArea_keep Pdrop d0:0D0 PFacet_area_keep Pgood PGood_neighbors\n\ + PMerge_keep Poutput_forced Pprecision_not\n\ +\n\ + QbBound 0:0.5 QbB_scale_box Qcoplanar QGood_point Qinterior\n\ + QJoggle Qrandom QRotate Qsearch_1st Qtriangulate\n\ + 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\ +"; + +/*-<a href="../libqhull/qh-qhull.htm" + >-------------------------------</a><a name="main">-</a> + + main( argc, argv ) + processes the command line, calls qhull() to do the work, and exits + + design: + initializes data structures + reads points + finishes initialization + computes convex hull and other structures + checks the result + writes the output + frees memory +*/ +int main(int argc, char *argv[]) { + int curlong, totlong; /* used !qh_NOmem */ + int exitcode, numpoints, dim; + coordT *points; + boolT ismalloc; + qhT qh_qh; + qhT *qh= &qh_qh; + + QHULL_LIB_CHECK /* Check for compatible library */ + + if ((argc == 1) && isatty( 0 /*stdin*/)) { + fprintf(stdout, qh_prompt2, qh_version); + exit(qh_ERRnone); + } + if (argc > 1 && *argv[1] == '-' && !*(argv[1]+1)) { + fprintf(stdout, qh_prompta, qh_version, qh_DEFAULTbox, + qh_promptb, qh_promptc, qh_promptd, qh_prompte); + exit(qh_ERRnone); + } + if (argc > 1 && *argv[1] == '.' && !*(argv[1]+1)) { + fprintf(stdout, qh_prompt3, qh_version); + exit(qh_ERRnone); + } + if (argc > 1 && *argv[1] == '-' && *(argv[1]+1)=='V') { + fprintf(stdout, "%s\n", qh_version2); + exit(qh_ERRnone); + } + qh_init_A(qh, stdin, stdout, stderr, argc, argv); /* sets qh->qhull_command */ + exitcode= setjmp(qh->errexit); /* simple statement for CRAY J916 */ + if (!exitcode) { + qh->NOerrexit = False; + qh_checkflags(qh, qh->qhull_command, hidden_options); + qh_initflags(qh, qh->qhull_command); + points= qh_readpoints(qh, &numpoints, &dim, &ismalloc); + if (dim >= 5) { + qh_option(qh, "Qxact_merge", NULL, NULL); + qh->MERGEexact= True; /* 'Qx' always */ + } + qh_init_B(qh, points, numpoints, dim, ismalloc); + qh_qhull(qh); + qh_check_output(qh); + qh_produce_output(qh); + if (qh->VERIFYoutput && !qh->FORCEoutput && !qh->STOPpoint && !qh->STOPcone) + qh_check_points(qh); + exitcode= qh_ERRnone; + } + qh->NOerrexit= True; /* no more setjmp */ +#ifdef qh_NOmem + qh_freeqhull(qh, qh_ALL); +#else + qh_freeqhull(qh, !qh_ALL); + qh_memfreeshort(qh, &curlong, &totlong); + if (curlong || totlong) + qh_fprintf_stderr(6263, "qhull internal warning (main): did not free %d bytes of long memory(%d pieces)\n", + totlong, curlong); +#endif + return exitcode; +} /* main */ + |