GetPointOutAt
fPath->GetPointOutAt(index - 1, previousOut);
fPath->GetPointOutAt(fIndex - 1, fPreviousOut);
|| !fPath->GetPointOutAt(fIndex - 1, fPreviousOut)
fPath->GetPointOutAt(fIndex, fPointOut);
fPath->GetPointOutAt(fIndex - 1, fPreviousOut);
bool GetPointOutAt(int32 index, BPoint& point) const;