CGAL users discussion list

[Efi Fogel <>]

Better define the traits  before hand, and use it afterwards everywhere you need it; something like the following:

typedef CGAL::Arr_segment_traits_2<Kernel>                                Arr_segment_traits;
typedef CGAL::Gps_segment_traits_2<Kernel, Container, Arr_segment_traits> Traits_2;

Traits_2 traits;

Kernel& kernel = traits;

   ____  _        ____             _
  /_____/_) o    /__________  __  //
 (____ (   (    (    (_/ (_/-(-'_(/
                         _/

On Fri, Nov 7, 2014 at 11:10 AM, Sebastien Loriot (GeometryFactory) <> wrote:

On 11/07/2014 10:01 AM, Vincent Mora wrote:

On 07/11/2014 09:48, Sebastien Loriot (GeometryFactory) wrote:

On 11/07/2014 09:33 AM, Vincent Mora wrote:

Hi,

I need to call are_holes_and_boundary_pairwise_disjoint(pwh, traits) to
check an instance pwh of CGAL::Polygon_with_holes_2<Kernel>.

I can't figure out how to obtain the traits parameter. Can someone tell
me ?

The following should work:

but does not: error: no type named ‘Polygon_with_holes_2’ in ‘class
CGAL::Epeck’

CGAL::Polygon_with_holes_2<Kernel> poly;
Kernel k;

Sorry:
CGAL::Gps_segment_traits_2<Kernel> traits;

Sebastien.

are_holes_and_boundary_pairwise_disjoint(poly, k);

The complete error:

/home/vmo/SFCGAL/src/algorithm/difference.cpp: In function
‘OutputIteratorType SFCGAL::algorithm::difference(const
CGAL::Polygon_with_holes_2<CGAL::Epeck>&, const
SFCGAL::detail::PrimitiveHandle<2>&, OutputIteratorType)’:
/home/vmo/SFCGAL/src/algorithm/difference.cpp:196:69: error: no matching
function for call to ‘are_holes_and_boundary_pairwise_disjoint(const
CGAL::Polygon_with_holes_2<CGAL::Epeck>&, SFCGAL::Kernel&)’
          if ( are_holes_and_boundary_pairwise_disjoint( primitive, k ) &&
^
/home/vmo/SFCGAL/src/algorithm/difference.cpp:196:69: note: candidate is:
In file included from /usr/local/include/CGAL/Gps_segment_traits_2.h:29:0,
                  from
/usr/local/include/CGAL/Boolean_set_operations_2.h:28,
                  from /home/vmo/SFCGAL/src/algorithm/difference.cpp:30:
/usr/local/include/CGAL/Boolean_set_operations_2/Gps_polygon_validation.h:599:6:
note: template<class Traits_2> bool
CGAL::are_holes_and_boundary_pairwise_disjoint(const typename
Traits_2::Polygon_with_holes_2&, Traits_2&)
  bool are_holes_and_boundary_pairwise_disjoint
       ^
/usr/local/include/CGAL/Boolean_set_operations_2/Gps_polygon_validation.h:599:6:
note:   template argument deduction/substitution failed:
/usr/local/include/CGAL/Boolean_set_operations_2/Gps_polygon_validation.h:
In substitution of ‘template<class Traits_2> bool
CGAL::are_holes_and_boundary_pairwise_disjoint(const typename
Traits_2::Polygon_with_holes_2&, Traits_2&) [with Traits_2 = CGAL::Epeck]’:
/home/vmo/SFCGAL/src/algorithm/difference.cpp:196:69:   required from here
/usr/local/include/CGAL/Boolean_set_operations_2/Gps_polygon_validation.h:599:6:
error: no type named ‘Polygon_with_holes_2’ in ‘class CGAL::Epeck’

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