Pygame:如何让两个物体在碰撞后停止移动

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((800, 600))

object1 = pygame.Rect(100, 100, 50, 50)
object1_speed = pygame.Vector2(3, 0)

object2 = pygame.Rect(200, 200, 50, 50)
object2_speed = pygame.Vector2(-2, 0)

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # 移动物体
    object1.move_ip(object1_speed)
    object2.move_ip(object2_speed)

    # 检测碰撞
    if object1.colliderect(object2):
        object1_speed = pygame.Vector2(0, 0)
        object2_speed = pygame.Vector2(0, 0)

    # 绘制物体
    screen.fill((255, 255, 255))
    pygame.draw.rect(screen, (255, 0, 0), object1)
    pygame.draw.rect(screen, (0, 0, 255), object2)
    pygame.display.flip()