Method sub

nodes.py:502–506

(self, other)

        self.s += other.s
        self.t += other.t
    def sub(self, other):
        self.e -= other.e
        self.r -= other.r
        self.s -= other.s
        self.t -= other.t
    def mul(self, value):
        self.e *= value
        self.r *= value