class Vector2D(EUDStruct):
    _fields_ = ['x', 'y']

    def __init__(self, x=None, y=None):
        if y is None:
            super().__init__(x)
        else:
            super().__init__([x, y])

    def lengthsq(self):
        return self.x * self.x + self.y * self.y

    def length(self):
        return f_sqrt(self.lengthsq())

    def dot(self, rhs):
        return self.x * rhs.x + self.y * rhs.y

    # Operator support

    def add(self, rhs):
        t = self.clone()
        t += rhs
        return t

    def sub(self, rhs):
        t = self.clone()
        t -= rhs
        return t

    def mul(self, rhs):
        t = self.clone()
        t *= rhs
        return t

    def div(self, rhs):
        t = self.clone()
        t //= rhs
        return t

    def __iadd__(self, rhs):
        self.x += rhs.x
        self.y += rhs.y
        return self

    def __isub__(self, rhs):
        self.x -= rhs.x
        self.y -= rhs.y
        return self

    def __imul__(self, rhs):
        self.x *= rhs
        self.y *= rhs
        return self

    def __ifloordiv__(self, rhs):
        if EUDIf()(self.x >= 0x80000000):
            self.x = -(-self.x // rhs)
        if EUDElse()():
            self.x //= rhs
        EUDEndIf()

        if EUDIf()(self.y >= 0x80000000):
            self.y = -(-self.y // rhs)
        if EUDElse()():
            self.y //= rhs
        EUDEndIf()

        return self