A = Point(m)
B = Point(m)
C = Point(m)
A' = Point(m)
B' = Point(m)
C' = Point(m)
a = Segment(A, B')
b = Segment(B, A')
c = Segment(A, C')
d = Segment(C, A')
e = Segment(B, C')
f = Segment(C, B')
D = Intersect(b, a)
E = Intersect(d, c)
F = Intersect(f, e)
g = Line(D, F)