Merge pull request #4439 from oleg-alexandrov/expand_example

Add to the user manual example a parameter described in the text

Advancing_front_surface_reconstruction/examples/Advancing_front_surface_reconstruction/reconstruction_fct.cpp

@@ -60,6 +60,8 @@ int main(int argc, char* argv[])
 {
   std::ifstream in((argc>1)?argv[1]:"data/half.xyz");
   double per = (argc>2)?boost::lexical_cast<double>(argv[2]):0;
+  double radius_ratio_bound = (argc>3)?boost::lexical_cast<double>(argv[3]):5.0;
+
   std::vector<Point_3> points;
   std::vector<Facet> facets;
 
@@ -71,7 +73,8 @@ int main(int argc, char* argv[])
   CGAL::advancing_front_surface_reconstruction(points.begin(),
                                                points.end(),
                                                std::back_inserter(facets),
-                                               perimeter);
+                                               perimeter,
+                                               radius_ratio_bound);
 
   std::cout << "OFF\n" << points.size() << " " << facets.size() << " 0\n";
   std::copy(points.begin(),