// Edit By TigerCN
define {

    pow = Pow
    sqr = SquareRoot
    exp(x) = Pow(bj_E,x)
    mod = ModuloInteger
    sin(r) = Sin(r * bj_DEGTORAD)
    cos(r) = Cos(r * bj_DEGTORAD)
    tan(r) = Tan(r * bj_DEGTORAD)

}