int main() { CDT cdt; cdt.insert_constraint(Point(2, 5), Point(8, 5)); cdt.insert(Point(5, 6)); cdt.insert(Point(5, 4)); std::pair<Vertex_handle,Vertex_handle> p; for(CDT::Subconstraint_iterator sit = cdt.subconstraints_begin(); sit != cdt.subconstraints_end(); ++sit){ p = (*sit).first; Vertex_handle vh1 = p.first; Vertex_handle vh2 = p.second; std::cerr << "subconstraint: " << vh1->point() << " -- " << vh2->point() << std::endl; } std::cerr << "\nMake Gabriel" << std::endl; CGAL::make_conforming_Gabriel_2(cdt); int counter = 0; for(CDT::Subconstraint_iterator sit = cdt.subconstraints_begin(); sit != cdt.subconstraints_end(); ++sit){ ++counter; p = (*sit).first; Vertex_handle vh1 = p.first; Vertex_handle vh2 = p.second; std::cerr << "subconstraint: " << vh1->point() << " -- " << vh2->point() << std::endl; } assert(counter>1); return 0; }