不确定如何将子弹实施到乒乓球游戏中

Question

我想在我的乒乓球游戏中实现子弹，我的桨可以射出子弹。目前，我只想专注于射击右边的子弹。这些子弹将来自桨的位置。但是，我不确定如何处理。我相信，制作一个精灵团体会使我的项目过度复杂化，我只希望我的子弹能够碰撞到我最终拥有的乒乓球中。这就是我到目前为止的。

class PlayerPaddle(Image):
    def __init__(self, screen_size, width, height, filename, color=(255,0,0)):
        # speed and direction have to be before super() 
        self.speed = 3
        self.direction = 0
        super().__init__(screen_size, width, height, filename, color=(255, 0, 0))
        self.rect.centerx = 40
        self.rect.centery = screen_size[1] // 2
        self.rect.height = 100 
    def update(self):
        self.rect.centery += self.direction*self.speed   # <--- use directly rect.centery 
        super().update()
        #self.rect.center = (self.centerx, self.centery) # <-- don't need it 
        if self.rect.top < 0:
            self.rect.top = 0
        if self.rect.bottom > self.screen_size[1]-1:
            self.rect.bottom = self.screen_size[1]-1

    def handle_event(self, event):
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                self.direction = -1
            elif event.key == pygame.K_DOWN:
                self.direction = 1      
            elif event.key == pygame.K_LEFT:
                self.turnLeft()
            elif event.key == pygame.K_RIGHT:
                self.turnRight()
            elif event.key == pygame.K_u:
                bullet = Bullet(screen_size, 5, 5, "naruto.png", color = (255, 0 , 0))
                bullet.rect.centerx = self.rect.centerx
                bullet.rect.centery = self.rect.centery 
                bullet.draw()
                bullet.update()

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_UP and self.direction == -1:
                self.direction = 0
            elif event.key == pygame.K_DOWN and self.direction == 1:
                self.direction = 0 

这是我的子弹班

class Bullet(Image):
    def __init__(self, screen_size, width, height, filename, color = (255, 0, 0)):
        super().__init__(screen_size, width, height, filename, color = (255, 0, 0))
    def update(self):
        self.rect.centery -= 3

Answer 1

我将在PlayerPaddle()

外创建Group()

self.bullets_group = pygame.sprite.Group()

并将其用作PlayerPaddle()

中的参数

self.player_paddle = PlayerPaddle(..., self.bullets_group)

以这种方式，玩家可以在组中添加子弹

   elif event.key == pygame.K_u:
       bullet = Bullet(screen_size, 5, 5, "naruto.png", color = (255, 0 , 0))
       bullet.rect.centerx = self.rect.centerx
       bullet.rect.centery = self.rect.centery 
       self.bullets_group.add(bullet)

和mainloop可以绘制和更新

def Update():
    self.bullets_group.update()
    self.player_paddle.update()
    self.ai_paddle.update(..., self.bullets_group)
def Render():
    self.bullets_group.draw()
    self.player_paddle.draw()