CGAL users discussion list

[Laurent Rineau <>]

On Thursday 25 September 2008 04:30:02 HAQUE, AKTER_HASNINE (GE Healthcare) 
wrote:
> Hi.
> This is Hasnine from Japan. according to the advice of Laurent I have
> modified the CGAL/examples/Surface_mesher/mesh_an_implicit_function.cpp
> by Adding #include <CGAL/Random.h> and CGAL::default_random =
> CGAL::Random(0);
>
> however, I have faces an compilation error. Do you have the same problem
> !! Please advice me how to fix this.

Right, my advice was false. 

Line 308 of <CGAL/Surface_mesher/Implicit_surface_oracle_3.h>, there is:

        typename CGAL::Random_points_on_sphere_3<Point,
          Point_creator> random_point_on_sphere(CGAL::to_double(radius));
        typename CGAL::Random_points_in_sphere_3<Point,
          Point_creator> random_point_in_sphere(CGAL::to_double(radius));

Those lines creates to points generators. Just turn those lines to:

 CGAL::Random random(0); // choose seed=0;
 typename CGAL::Random_points_on_sphere_3<Point,
   Point_creator> random_point_on_sphere(CGAL::to_double(radius), random);
 typename CGAL::Random_points_in_sphere_3<Point,
   Point_creator> random_point_in_sphere(CGAL::to_double(radius), random);

I hope this time that is correct! (Not tested) Anyway, you see the point: if 
CGAL::default_random cannot be change, just create another CGAL::Random 
object, and use that one.

-- 
Laurent Rineau, PhD
Engineer at GeometryFactory
http://www.geometryfactory.com/