MaybeDiff Difference(const Edge& lhs, const Edge& rhs) {
if (IsAdherable(lhs, rhs)) {
return rhs.End() - lhs.Begin();
} else {
return boost::none;
}
}
bool IsSameEnough(const Edge& lhs, const Edge& rhs) {
if (IsSameEnough(lhs.Center(), rhs.Center()) &&
lhs.Length() == rhs.Length()) {
Q_ASSERT((IsSameEnough(lhs.Begin(), rhs.Begin()) &&
IsSameEnough(lhs.End(), rhs.End()) &&
!IsSameEnough(lhs.Begin(), rhs.End()) &&
!IsSameEnough(lhs.End(), rhs.Begin()) &&
AngleDistance(lhs, rhs) == 0.0) ||
(!IsSameEnough(lhs.Begin(), rhs.Begin()) &&
!IsSameEnough(lhs.End(), rhs.End()) &&
IsSameEnough(lhs.Begin(), rhs.End()) &&
IsSameEnough(lhs.End(), rhs.Begin()) &&
AngleDistance(lhs, rhs) == 180.0));
return true;
} else {
return false;
}
}