def canvas_angle(self, base):
    ' canvas_angle(self, base) -> (float, float, float)\n        '
    angle = ((((self.sweep * 2) * pi) * (base - self.start)) / self.length)
    return (angle, cos(angle), sin(angle))
canvas_angle(self, base) -> (float, float, float)
def canvas_angle(self, base):
    ' \n        '
    angle = ((((self.sweep * 2) * pi) * (base - self.start)) / self.length)
    return (angle, cos(angle), sin(angle))