# -*- coding: utf-8 -*-
from numpy import angle
def comp_angle_opening(self):
"""Compute the average opening angle of the Slot
Parameters
----------
self : Slot
A Slot object
Returns
-------
alpha: float
Average opening angle of the slot [rad]
"""
line_list = self.build_geometry()
Z1 = line_list[0].get_begin()
Z2 = line_list[-1].get_end()
return angle(Z2) - angle(Z1)