hpp-fcl: rbox.c Source File

Go to the documentation of this file.
 /*<html><pre>  -<a                             href="../libqhull/index.htm#TOC"
   >-------------------------------</a><a name="TOP">-</a>
 
    rbox.c
      rbox program for generating input points for qhull.
 
    notes:
      50 points generated for 'rbox D4'
 
 */
 
 #include "libqhull/libqhull.h"
 #include "libqhull/random.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\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) {
   char *command;
   int command_size;
   int return_status;
 
   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 non-reentrant rbox was linked to 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");
 
   command_size= qh_argv_to_command_size(argc, argv);
   if ((command= (char *)qh_malloc((size_t)command_size))) {
     if (!qh_argv_to_command(argc, argv, command, command_size)) {
       qh_fprintf_stderr(6264, "rbox internal error: allocated insufficient memory (%d) for arguments\n", command_size);
       return_status= qh_ERRinput;
     }else{
       return_status= qh_rboxpoints(stdout, stderr, command);
     }
     qh_free(command);
   }else {
     qh_fprintf_stderr(6265, "rbox error: insufficient memory for %d bytes\n", command_size);
     return_status= qh_ERRmem;
   }
   return return_status;
 }/*main*/
 