如何在pygame中使用collidepoint()？

import pygame

# 初始化pygame
pygame.init()

# 创建窗口
window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption("Collide Point Example")

# 创建矩形
rect_x = 100
rect_y = 100
rect_width = 200
rect_height = 100
rect = pygame.Rect(rect_x, rect_y, rect_width, rect_height)

# 游戏主循环
running = True
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 获取鼠标点击坐标
    mouse_pos = pygame.mouse.get_pos()

    # 判断鼠标点击是否在矩形内部
    is_collide = rect.collidepoint(mouse_pos)

    # 绘制矩形
    window.fill((255, 255, 255))
    if is_collide:
        pygame.draw.rect(window, (0, 255, 0), rect)
    else:
        pygame.draw.rect(window, (255, 0, 0), rect)
    pygame.display.flip()

# 退出游戏
pygame.quit()