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[cdoucet <>]

Hello,

I am trying to compute intersections following this  section
<http://doc.cgal.org/latest/Kernel_23/group__intersection__linear__grp.html>  
of the documentation.

My version of CGAL is 4.4.
My version of boost is 1.46.1

My implementation is based on the definitions above:
------------------------------------------------
typedef CGAL::Exact_predicates_inexact_constructions_kernel         K;
typedef Delaunay::Ray Ray;
typedef Delaunay::Triangle Triangle;
typedef CGAL::cpp11::result_of<K::Intersect_3(Ray, Triangle)>::type
RayTriangleIntersection;
------------------------------------------------

I have a compilation error with this line:
      RayTriangleIntersection
intersection(currentRay,facetOppositeToVisiblePoint);
where
  currentRay is a Ray,
  facetOppositeToVisiblePoint is a Triangle obtained from  triangle
<http://doc.cgal.org/latest/Triangulation_3/classCGAL_1_1Triangulation__3.html#a4672fcd04d571aee926741920d0aba30>
  
function

When I try to compile, I get the following error message:

erreur: no matching function for call to
‘boost::optional<boost::variant&lt;CGAL::Point_3&lt;CGAL::Epick>,
CGAL::Segment_3<CGAL::Epick>, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_> >::optional(Ray&, Triangle&)’
/home/cdoucet/local/mvs/demo/triangulation/delaunay.cpp:274:82: note:
candidates are:
/usr/include/boost/optional/optional.hpp:564:5: note:
boost::optional<T>::optional(const boost::optional<T>&) [with T =
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>,
boost::optional<T> =
boost::optional<boost::variant&lt;CGAL::Point_3&lt;CGAL::Epick>,
CGAL::Segment_3<CGAL::Epick>, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_> >]
/usr/include/boost/optional/optional.hpp:564:5: note:   candidate expects 1
argument, 2 provided
/usr/include/boost/optional/optional.hpp:559:14: note: template<class Expr>
boost::optional::optional(const Expr&)
/usr/include/boost/optional/optional.hpp:539:14: note: template<class U>
boost::optional::optional(const boost::optional<U>&)
/usr/include/boost/optional/optional.hpp:530:5: note:
boost::optional<T>::optional(bool, boost::optional<T>::argument_type) [with
T = boost::variant<CGAL::Point_3&lt;CGAL::Epick>,
CGAL::Segment_3<CGAL::Epick>, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_>, boost::optional<T>::argument_type = const
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>&]
/usr/include/boost/optional/optional.hpp:530:5: note:   no known conversion
for argument 1 from ‘Ray {aka CGAL::Ray_3<CGAL::Epick>}’ to ‘bool’
/usr/include/boost/optional/optional.hpp:526:5: note:
boost::optional<T>::optional(boost::optional<T>::argument_type) [with T =
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>,
boost::optional<T>::argument_type = const
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>&]
/usr/include/boost/optional/optional.hpp:526:5: note:   candidate expects 1
argument, 2 provided
/usr/include/boost/optional/optional.hpp:522:5: note:
boost::optional<T>::optional(boost::none_t) [with T =
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>, boost::none_t
= int boost::detail::none_helper::*]
/usr/include/boost/optional/optional.hpp:522:5: note:   candidate expects 1
argument, 2 provided
/usr/include/boost/optional/optional.hpp:518:5: note:
boost::optional<T>::optional() [with T =
boost::variant<CGAL::Point_3&lt;CGAL::Epick>, CGAL::Segment_3<CGAL::Epick>,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_,
boost::detail::variant::void_, boost::detail::variant::void_>]
/usr/include/boost/optional/optional.hpp:518:5: note:   candidate expects 0
arguments, 2 provided

Do you see where I make a mistake?

Best,

Cédric 
Inria Paris-Rocquencourt






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