# Messy data file

nodeset
 {
node A (-10, # comment
 10)
node B(10,
 10 )
node C ( 10, -10)
node D(-10, -10 )  node E ( 0, 0)
node F( #comment
0, 15)
node G (10 , 0) # this node is on edge b
node H(5,0)
node I(15,0)
node J(5,-5)
node K(15,5)
node L(0,13)
node M(0,16)
#node N(-11,10)
#node O(11,10)
}

edgeset          {
    edge a(A,
 B)
edge b(B,C ) edge c(C,D )
edge d( #comment
D,A)
edge e(E, F) # intersects edge a (vertical, non-vertical)
#edge f(H, I) # intersects edge b (non-vertical, vertical)
edge g(J, K) # intersects edge f (non-vertical, non-vertical - node G is intersect)
#edge h(L, M) # intersects edge e (vertical, vertical - overlap)
#edge i(N, O) # intersects edge a (non-vertical, non-vertical - overlap)
edge j(A, A) # zero length edge
}

faceset
{
face S{c, a, b, d}
face T{a, b, d}
}