CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 02/04/2015 02:07 AM, Yuetong Luo wrote:
> Dear all,
>
> I am trying to to use "CGAL::To_double()" , but I am suffering from
> compile error. My compiler is MicroSoft Visual studio 2010
>
> The code:
>
> #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
> struct Kernel : public CGAL::Exact_predicates_exact_constructions_kernel
> {};
> typedef Kernel::Point_2 Point_2;
> int main ()
> {
> Point_2 point(3,5);
> CGAL::To_double(point.x());
> return 0;
> }
>
> complile error:
>
> ErrorC2955: Use of Class template reuires argument list
> error C2440: '<function-style-cast>' : cannot convert from
> 'CGAL::Lazy_exact_nt<ET_>' to 'CGAL::To_double'

try CGAL::to_double(point.x());

All functions in CGAL are lowercase.

If you want to converter objects between kernel, you can use
the cartesian converter like this:

CGAL::Cartesian_converter<K1,K2> to_K2;
K1::Point_3 p1;
K2::Point_3 p2 = to_K2(p1);

Sebastien

> Could anyone tell me how to modify the code to let it pass the compling
> and building?
>
> Thanks