Method all_same_angle

graph.py:2479–2484

(
      self, a: Point, b: Point, c: Point, d: Point
  )

        yield p1, p2

  def all_same_angle(
      self, a: Point, b: Point, c: Point, d: Point
  ) -> Generator[tuple[Point, Point, Point, Point], None, None]:
    for x, y in self.all_same_line(a, b):
      for m, n in self.all_same_line(c, d):
        yield x, y, m, n

  def additionally_draw(self, name: str, args: list[Point]) -> None:
    """Draw some extra line/circles for illustration purpose."""