hpp-fcl: rbox_r.c Source File

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    rbox.c
      rbox program for generating input points for qhull.
 
    notes:
      50 points generated for 'rbox D4'
 
 */
 
 #include "libqhull_r/libqhull_r.h"
 #include "libqhull/random_r.h"
 
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #ifdef _MSC_VER  /* Microsoft Visual C++ -- warning level 4 */
 #pragma warning( disable : 4706)  /* assignment within conditional function */
 #endif
 
 char prompt[]= "\n\
 -rbox- generate various point distributions.  Default is random in cube.\n\
 \n\
 args (any order, space separated):                    Version: 2016/01/18 r\n\
   3000    number of random points in cube, lens, spiral, sphere or grid\n\
   D3      dimension 3-d\n\
   c       add a unit cube to the output ('c G2.0' sets size)\n\
   d       add a unit diamond to the output ('d G2.0' sets size)\n\
   l       generate a regular 3-d spiral\n\
   r       generate a regular polygon, ('r s Z1 G0.1' makes a cone)\n\
   s       generate cospherical points\n\
   x       generate random points in simplex, may use 'r' or 'Wn'\n\
   y       same as 'x', plus simplex\n\
   Cn,r,m  add n nearly coincident points within radius r of m points\n\
   Pn,m,r  add point [n,m,r] first, pads with 0, maybe repeated\n\
 \n\
   Ln      lens distribution of radius n.  Also 's', 'r', 'G', 'W'.\n\
   Mn,m,r  lattice(Mesh) rotated by [n,-m,0], [m,n,0], [0,0,r], ...\n\
           '27 M1,0,1' is {0,1,2} x {0,1,2} x {0,1,2}.  Try 'M3,4 z'.\n\
   W0.1    random distribution within 0.1 of the cube's or sphere's surface\n\
   Z0.5 s  random points in a 0.5 disk projected to a sphere\n\
   Z0.5 s G0.6 same as Z0.5 within a 0.6 gap\n\
 \n\
   Bn      bounding box coordinates, default %2.2g\n\
   h       output as homogeneous coordinates for cdd\n\
   n       remove command line from the first line of output\n\
   On      offset coordinates by n\n\
   t       use time as the random number seed(default is command line)\n\
   tn      use n as the random number seed\n\
   z       print integer coordinates, default 'Bn' is %2.2g\n\
 ";
 
 /*--------------------------------------------
 -rbox-  main procedure of rbox application
 */
 int main(int argc, char **argv) {
   int return_status;
   qhT qh_qh;
   qhT *qh= &qh_qh;
 
   QHULL_LIB_CHECK_RBOX
 
   if (argc == 1) {
     printf(prompt, qh_DEFAULTbox, qh_DEFAULTzbox);
     return 1;
   }
   if (argc == 2 && strcmp(argv[1], "D4")==0)
     qh_fprintf_stderr(0, "\nStarting the rbox smoketest for qhull.  An immediate failure indicates\nthat reentrant rbox was linked to non-reentrant routines.  An immediate\nfailure of qhull may indicate that qhull was linked to the wrong\nqhull library.  Also try 'rbox D4 | qhull T1'\n");
 
   qh_init_A(qh, stdin, stdout, stderr, argc, argv);  /*no qh_errexit, sets qh->qhull_command */
   return_status= qh_rboxpoints(qh, qh->qhull_command); /* Traps its own errors, qh_errexit_rbox() */
   return return_status;
 }/*main*/
 