Resets the readonly variables.

def reset(self):
        """ Resets the readonly variables.
        """
        self.p_from = 0.0
        self.p_to = 0.0
        self.q_from = 0.0
        self.q_to = 0.0

        self.mu_s_from = 0.0
        self.mu_s_to = 0.0

        self.mu_angmin = 0.0
        self.mu_angmax = 0.0