CGAL users discussion list

[Clément Jamin <>]

Hi,

On Fri, May 5, 2017 at 7:39 AM, GSBicalho 
<>
 wrote:
>
> What I want to do seems simple, just create 1000 points in a 4D sphere and
> then triangulate them. Yet, for some reason, the code below only works
> aproximately 1 in 20 times, perhaps less.
>
> ---CODE---
>
> const int D = 4; // we work in Euclidean 4-space
> typedef CGAL::Dimension_tag< D > Dim_tag;
> typedef CGAL::Epick_d< Dim_tag >  Kernel;
> typedef CGAL::Triangulation< Kernel > Triangulation;
> typedef Triangulation::Point Point_4;
> typedef CGAL::Delaunay_triangulation<Kernel> DenTriangulation;
>
> int main() {
>         CGAL::Random_points_in_ball_d<Point_4> rand_it(D, 1.0);
>         std::vector<Point_4> points;
>         CGAL::cpp11::copy_n(rand_it, 1000, std::back_inserter(points));
>
>         Triangulation t(D);                      // create triangulation
>         CGAL_assertion(t.empty());
>         t.insert(points.begin(), points.end());  // compute triangulation
>         CGAL_assertion(t.is_valid());
> }
>
> ----------
>

Your code works fine on my machine. Are you sure it is crashing inside
this piece of code?

>
> Whenever it doesn't work, it throws the exception:
>
> Exception thrown at 0x6ACD835A (libgmp-10.dll) in array_convex_hull_2.exe:
> 0xC0000005: Access violation reading location 0x011C3000. occurred

"array_convex_hull_2.exe"? Is it normal? Are you launching the right 
executable?

> It looks to me that whenever the code does work, it was lucky that the
> points fell in places that allowed /something/ specific to happen. I just
> don't know what.
>
> Can anyone confirm that this also happens to them?
> Do the points of a triangulation require some arcane property to them that I
> don't know about?
>
>
>
>
> --
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> Sent from the cgal-discuss mailing list archive at Nabble.com.
>
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