在Pygame中每隔几秒钟移动一个对象

在Pygame中每隔几秒钟移动一个对象

您可以将

Event

搭配使用

pygame.time.set_timer()

：

pygame.time.set_timer（）
在事件队列上重复创建一个事件

set_timer(eventid, milliseconds) -> None

设置事件类型以每给定的毫秒数出现在事件队列中

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这是一个简单的完整示例。请注意敌人如何每1000毫秒向侧面移动一次，每3500毫秒向下移动一次，并且您可以每450毫秒射击一次（全部使用事件进行射击）。

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import pygame# you'll be able to shoot every 450msRELOAD_SPEED = 450# the foes move every 1000ms sideways and every 3500ms downMOVE_SIDE = 1000MOVE_DOWN = 3500screen = pygame.display.set_mode((300, 200))clock = pygame.time.Clock()pygame.display.set_caption("Micro Invader")# create a bunch of events move_side_event = pygame.USEREVENT + 1move_down_event = pygame.USEREVENT + 2reloaded_event  = pygame.USEREVENT + 3move_left, reloaded = True, Trueinvaders, colors, shots = [], [] ,[]for x in range(15, 300, 15):    for y in range(10, 100, 15):        invaders.append(pygame.Rect(x, y, 7, 7))        colors.append(((x * 0.7) % 256, (y * 2.4) % 256))# set timer for the movement eventspygame.time.set_timer(move_side_event, MOVE_SIDE)pygame.time.set_timer(move_down_event, MOVE_DOWN)player = pygame.Rect(150, 180, 10, 7)while True:    clock.tick(40)    if pygame.event.get(pygame.QUIT): break    for e in pygame.event.get():        if e.type == move_side_event: for invader in invaders:     invader.move_ip((-10 if move_left else 10, 0)) move_left = not move_left        elif e.type == move_down_event: for invader in invaders:     invader.move_ip(0, 10)        elif e.type == reloaded_event: # when the reload timer runs out, reset it reloaded = True pygame.time.set_timer(reloaded_event, 0)    for shot in shots[:]:        shot.move_ip((0, -4))        if not screen.get_rect().contains(shot): shots.remove(shot)        else: hit = False for invader in invaders[:]:     if invader.colliderect(shot):         hit = True         i = invaders.index(invader)         del colors[i]         del invaders[i] if hit:     shots.remove(shot)    pressed = pygame.key.get_pressed()    if pressed[pygame.K_LEFT]: player.move_ip((-4, 0))    if pressed[pygame.K_RIGHT]: player.move_ip((4, 0))    if pressed[pygame.K_SPACE]:         if reloaded: shots.append(player.copy()) reloaded = False # when shooting, create a timeout of RELOAD_SPEED pygame.time.set_timer(reloaded_event, RELOAD_SPEED)    player.clamp_ip(screen.get_rect())    screen.fill((0, 0, 0))    for invader, (a, b) in zip(invaders, colors):         pygame.draw.rect(screen, (150, a, b), invader)    for shot in shots:         pygame.draw.rect(screen, (255, 180, 0), shot)    pygame.draw.rect(screen, (180, 180, 180), player)        pygame.display.flip()