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[houes <>]

Dear Adrien,

Thank you very much！ Your method works well for me!

A follow up question:

If I use the definition you provide:
/typedef CGAL::Extended_cartesian< CGAL::Lazy_exact_nt<CGAL::Gmpq> > Kernel;
typedef CGAL::Nef_polyhedron_2<Kernel>   Nef_polyhedron;
typedef Nef_polyhedron::Line  Line;
typedef Nef_polyhedron::Point Point;/

I notice I cannot convert from Kernel::Point_2 to Nef_polyhedron::Point or
Kernel::Line_2 to Nef_polyhedron::Line. It seems the point and line type are
different. If there any way to do the cast?

In fact, I am using Epick::Point_2 and Epick::Line_2, neither of them can be
directly assigned to Nef_polyhedron::Point or Nef_polyhedron::Line, I wonder
if any type cast can do the trick.

The reason I need to do the type cast is that all my data is in stored Epick
kernel and I need to transfer them into the Nef_polyhedron Kernel type to do
polygon union/intersection.

One last question, does your method also applies to Nef_polyhedron_3?

Thank you very much!

houes



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