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qhull_interface.cpp
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Sat, Jul 6, 19:50

qhull_interface.cpp
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/*<html><pre> -<a href="qh-user.htm"
>-------------------------------</a><a name="TOP">-</a>
*/
#include <iostream.h>
#include <conio.h>
//--- Include qhull, so it works from with in a C++ source file
//---
//--- In MVC one cannot just do:
//---
//--- extern "C"
//--- {
//--- #include "qhull_a.h"
//--- }
//---
//--- Because qhull_a.h includes math.h, which can not appear
//--- inside a extern "C" declaration.
//---
//--- Maybe that why Numerical recipes in C avoid this problem, by removing
//--- standard include headers from its header files and add them in the
//--- respective source files instead.
//---
//--- [K. Erleben]
#if defined(__cplusplus)
extern "C"
{
#endif
#include <stdio.h>
#include <stdlib.h>
#include <qhull/qhulllib.h>
#include <qhull/mem.h>
#include <qhull/qset.h>
#include <qhull/geom.h>
#include <qhull/merge.h>
#include <qhull/poly.h>
#include <qhull/io.h>
#include <qhull/stat.h>
#if defined(__cplusplus)
}
#endif
/*********************************************************************/
/* */
/* */
/* */
/* */
/*********************************************************************/
void compute_convex_hull(void)
{
int dim; /* dimension of points */
int numpoints; /* number of points */
coordT *points; /* array of coordinates for each point */
boolT ismalloc; /* True if qhull should free points in qh_freeqhull() or reallocation */
char flags[]= "qhull Tv"; /* option flags for qhull, see qh_opt.htm */
FILE *outfile= stdout; /* output from qh_produce_output()
use NULL to skip qh_produce_output() */
FILE *errfile= stderr; /* error messages from qhull code */
int exitcode; /* 0 if no error from qhull */
facetT *facet; /* set by FORALLfacets */
int curlong, totlong; /* memory remaining after qh_memfreeshort */
/* initialize dim, numpoints, points[], ismalloc here */
exitcode= qh_new_qhull(dim, numpoints, points, ismalloc,
flags, outfile, errfile);
if (!exitcode) { /* if no error */
/* 'qh facet_list' contains the convex hull */
FORALLfacets {
/* ... your code ... */
}
}
qh_freeqhull(!qh_ALL);
qh_memfreeshort(&curlong, &totlong);
if (curlong || totlong)
fprintf(errfile, "qhull internal warning (main): did not free %d bytes of long memory(%d pieces)\n",
totlong, curlong);
};
/*********************************************************************/
/* */
/* */
/* */
/* */
/*********************************************************************/
void main()
{
cout << "Hello world" << endl;
cout << "Press any key..." << endl;
while (!_kbhit());
};

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