/// <summary>
/// make a more adjustive DOI algorithm
/// </summary>
/// <param name="cur"></param>
/// <param name="dest"></param>
/// <returns></returns>
int makeDOI(LineEntity cur, LineEntity dest)
{
//another hard code fix, a line 549 bug,
//if (cur == null || dest == null) return -1;
if (cur.Equals(dest)) return 0;
int dist = GetDistInAST(cur, dest);
return (-dest.LineDepth - dist); //here can be more complext formular
}
