在 pygame 中发射多枚射弹

Question

我有一个 Missile class 在按下空格键时获取 Player 的位置。 .fire()利用这个位置发射导弹。一次只能拍一张，怎么拍多张？我听说使用列表会有帮助。

class Missile(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        # Get image of the whole spritesheet
        self.imgMaster = pygame.image.load("Royalty-Free-Game-art-Spaceships-from-Unlucky-Studio.png")
        self.imgMaster.convert()
        misImgSize = (45, 77)
        # Create a surface to draw a section of the spritesheet
        self.image = pygame.Surface(misImgSize)
        self.image.blit(self.imgMaster, (0,0), ( (71, 1956) ,(misImgSize)) )
        self.image.set_colorkey( self.image.get_at((1,1)))
        self.image = pygame.transform.scale( self.image, (15, 35) )
        # Get rect of sprite
        self.rect = self.image.get_rect()
        # Place missile off-screen at first
        self.rect.center = (-100, -100)
        self.dy = 0

    def fire(self, player_pos):
            self.rect.center = player_pos  # Move Bomb to cannon.
            self.dy = BOMB_SpeedY              # Set its velocity.

    
    def update(self):
        self.rect.centery -= self.dy
    
    def reset(self):
        self.rect.center = (-100, -100)     # This location is off-screen!
        self.dx = 0

事件处理程序中的代码：

clock = pygame.time.Clock()
#  - Set a loop that keeps running until user quits or proceeds
keepGoing = True
while keepGoing:
    # Set FPS of the game - 30 frames per second/tick
    clock.tick(CLOCK_TICK)
    # Every 30 ticks is a second
    tickCount += 1

# Handle any events
for event in pygame.event.get():
    if event.type == pygame.QUIT:
        keepGoing = False 
        print("hi!")
    if event.type == pygame.KEYDOWN:

        if event.key == pygame.K_SPACE:
            missile.fire(player.get_pos())

Answer 1

您必须为导弹创建一个组。当按下 SPACE 时，创建一个新的 Missile 实例并将其添加到列表中：

missilesGroup = pygame.sprite.Group()

keepGoing = True
while keepGoing:
    # [...]

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            keepGoing = False 
            print("hi!")

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                missile = Missile()
                missile.fire(player.get_pos())
                missilesGroup.add(missile)

我建议也将新导弹添加到所有 Sprites 的 Group 中。

不要“重置”导弹，而是使用 kill 将其移除：

class Missile(pygame.sprite.Sprite):
    # [...]

    def reset(self):
        self.kill()

见kill

remove the Sprite from all Groups

在 pygame 中发射多枚射弹

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