CGAL users discussion list

[Winnie Hellmann <>]

Hi again,

I just stumbled over inserting a point which lies on the edge of a 
constrained Delaunay triangulation. I tried to use insert_in_edge(point, 
face, edge), but checking is_valid() of the triangulation afterwards 
fails an assertion in the following lines:

result = result && !is_flipable(fit,i, false);
CGAL_triangulation_assertion( result );

(inside Constrained_Delaunay_triangulation_2.h)

Interestingly the following call with same point, same face and same 
edge index (and lt = EDGE) works:
insert(point, lt, face, edge);

I will now use the latter one, but just out of curiosity: What is the 
difference between those two calls? I am running CGAL 3.9.

Winnie Hellmann