Remove the existante points from cdt2.
cdt2_remove_points(ptr,x,y);
Given a pointer ptr of cdt2, cdt2_remove_points(ptr,x,y) removes (x,y) points from cdt2. All points of (x,y) points that are incidents to the constraint edges will not be removed.
This function uses the Triangulation_2 package of CGAL, which is under QPL license. See License Terms