From 43ae475b2c8d0389112085a3fc11ff27f9869b32 Mon Sep 17 00:00:00 2001
From: Brad Barber <bradb@shore.net>
Date: Mon, 11 Jan 2010 22:21:33 -0500
Subject: [PATCH] Restore qhull_interface.cpp. It may be useful for simple
integrations.
--Brad
---
cpp/qhull_interface.cpp | 96 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
create mode 100644 cpp/qhull_interface.cpp
diff --git a/cpp/qhull_interface.cpp b/cpp/qhull_interface.cpp
new file mode 100644
index 0000000..9b008e0
--- /dev/null
+++ b/cpp/qhull_interface.cpp
@@ -0,0 +1,96 @@
+/*<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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