我是 python 和 Pygame 的新手，正在嘗試創(chuàng)建游戲。我希望在設(shè)定的時(shí)間后出現(xiàn)“通電”，然后每次計(jì)時(shí)器達(dá)到這么多秒時(shí)重復(fù)一次。代碼中，出現(xiàn)“powerup”并在5秒后落下屏幕，定時(shí)器重置，但下一次定時(shí)器達(dá)到5秒時(shí)，繼續(xù)計(jì)數(shù)，不再產(chǎn)生“powerup”。我花了幾個(gè)小時(shí)試圖找出為什么這不起作用。import pygameimport randomWIDTH = 480HEIGHT = 600FPS = 60WHITE = (255, 255, 255)BLACK = (0, 0, 0)GREEN = (0, 255, 0)pygame.init()screen = pygame.display.set_mode((WIDTH, HEIGHT))clock = pygame.time.Clock()time_difference = 0font_name = pygame.font.match_font('arial')def draw_text(surf, text, size, x, y): font = pygame.font.Font(font_name, size) text_surface = font.render(text, True, WHITE) text_rect = text_surface.get_rect() text_rect.midtop = (x, y) surf.blit(text_surface, text_rect)class HealthPack(pygame.sprite.Sprite): def __init__(self): pygame.sprite.Sprite.__init__(self) self.image = pygame.Surface((50, 40)) self.image.fill(GREEN) self.rect = self.image.get_rect() self.radius = 50 self.rect.x = random.randrange(WIDTH - self.rect.width) self.rect.y = random.randrange(-150, -100) self.speedy = 6 self.speedx = 0 def update(self): self.rect.y += self.speedy if self.rect.top > HEIGHT: self.kill()all_sprites = pygame.sprite.Group()healthpack = HealthPack()running = Truewhile running: clock.tick(FPS) time_difference = pygame.time.get_ticks() if time_difference >= 5000: all_sprites.add(healthpack) time_difference -= 5000 for event in pygame.event.get(): if event.type == pygame.QUIT: running = False all_sprites.update() screen.fill(BLACK) all_sprites.draw(screen) draw_text(screen, str(time_difference), 18, WIDTH / 2, 55) pygame.display.flip()pygame.quit()
2 回答
白衣非少年
TA貢獻(xiàn)1155條經(jīng)驗(yàn) 獲得超0個(gè)贊
您不是在計(jì)算自上次以來的時(shí)差powerup。time_difference始終是游戲開始后的時(shí)間。每次要重置計(jì)時(shí)器時(shí)都需要保存滴答聲，并與之進(jìn)行比較。
prev_time = pygame.time.get_ticks() #initialize tick counter
while running:
clock.tick(FPS)
time_difference = pygame.time.get_ticks() - prev_time
if time_difference >= 5000:
all_sprites.add(healthpack)
prev_time = pygame.time.get_ticks() # reset counter
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
all_sprites.update()
screen.fill(BLACK)
all_sprites.draw(screen)
draw_text(screen, str(time_difference), 18, WIDTH / 2, 55)
pygame.display.flip()
胡子哥哥
TA貢獻(xiàn)1825條經(jīng)驗(yàn) 獲得超6個(gè)贊
他對(duì) 的修復(fù)是正確的time_difference，但您的代碼也存在另一個(gè)問題。
另一個(gè)問題是healthpack. 你正在這樣做all_sprites.add(healthpack)，這只會(huì)把舊的healthpack放回列表中all_sprites。那個(gè)精靈離開屏幕并下降。你需要一個(gè)新的實(shí)例HealthPack。所以你需要像這樣修改@Barmar的解決方案：
prev_time = pygame.time.get_ticks() #initialize tick counter
while running:
clock.tick(FPS)
time_difference = pygame.time.get_ticks() - prev_time
if time_difference >= 5000:
healthpack = HealthPack() # <----------------- add this line
all_sprites.add(healthpack)
prev_time = pygame.time.get_ticks() # reset counter
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