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["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le jeudi 16 mai 2013 15:14:33 Yohann a écrit :
>     typedef
> CGAL::Constrained_Delaunay_triangulation_2<T_CgalKernel,T_TriangulationTds,T
> _TriangulationItag> T_Triangulation;

Here you should probably use that:

typedef CGAL::Constrained_Delaunay_triangulation_2<
  T_CgalKernel,
  T_TriangulationTds,
  T_TriangulationItag
  > T_Triangulation_base;
typedef CGAL::Constrained_triangulation_plus_2<T_Triangulation_base>
    T_Triangulation_base;

The template class Constrained_triangulation_plus_2 behaves like the Cdt 
template class, but handles a hierarchy of constraints. And if a constraint 
is 
inserted twice (even in a different orientation), it does not try to compute 
twice the intersections with the other constraints. That could fix your 
issues, if my guess is right.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/