如何更改cv2矩形的角度？

import cv2
import numpy as np

# 定义矩形的角度
angle = 45

# 定义矩形的中心坐标、宽度和高度
center = (100, 100)
width = 200
height = 100

# 计算矩形的最小外接矩形
rect = cv2.minAreaRect(((center[0], center[1]), (width, height), angle))

# 将最小外接矩形转换为四个角点的坐标
box = cv2.boxPoints(rect)
box = np.int0(box)

# 修改角点坐标来改变矩形的角度
M = cv2.getRotationMatrix2D(center, angle, 1)
box = cv2.transform(np.array([box]), M)[0]

# 绘制矩形
image = np.zeros((200, 200, 3), dtype=np.uint8)
cv2.drawContours(image, [box], 0, (0, 255, 0), 2)

cv2.imshow("Rotated Rectangle", image)
cv2.waitKey(0)
cv2.destroyAllWindows()