CGAL users discussion list

[Marc Glisse <>]

On Sat, 27 Apr 2013, Evan Behar wrote:

> Hi,
> I have the following code:
>
> #include <CGAL/Polyhedron_3.h>
> #include <CGAL/Gmpq.h>
> #include <CGAL/Lazy_exact_nt.h>
> #include <CGAL/Extended_cartesian.h>
>
> typedef CGAL::Extended_cartesian< CGAL::Lazy_exact_nt<CGAL::Gmpq> > Kernel;
> typedef CGAL::Point_3<Kernel>                                       Point;

Try Kernel::Point_3 instead, that's the proper way to use a traits class.

> int main() {
>   
>   Point p(1.0f,1.0f,1.0f);
>
>   return 0;
> } 
>
> When I try to compile this program, I get the following error:
>
> In file included from /opt/local/CGAL-4.1/include/CGAL/assertions.h:34:0,
>                  from /opt/local/CGAL-4.1/include/CGAL/basic.h:42,
>                  from /opt/local/CGAL-4.1/include/CGAL/Polyhedron_3.h:24,
>                  from /home/ebehar/test/test.cpp:1:
> /opt/local/CGAL-4.1/include/CGAL/Point_3.h: In instantiation of ‘class
> CGAL::Point_3<CGAL::Extended_cartesian<CGAL::Lazy_exact_nt<CGAL::Gmpq> > >’:
> /home/ebehar/test/test.cpp:12:10:   required from here
> /opt/local/CGAL-4.1/include/CGAL/assertions.h:124:6: error: invalid
> application of ‘sizeof’ to incomplete type
> ‘boost::STATIC_ASSERTION_FAILURE<false>’
>       BOOST_STATIC_ASSERT(EX)
>       ^
> /opt/local/CGAL-4.1/include/CGAL/Point_3.h:47:3: note: in expansion of macro
> ‘CGAL_static_assertion’
>    CGAL_static_assertion((boost::is_same<Self, typename
> R_::Point_3>::value));
>
>
> Is there something additional I have forgotten to do in order to use the
> Extended_cartesian kernel with Point_3 or Vector_3?
>
> Thanks,
> Evan

--
Marc Glisse