在pygame上进行Pong，尽管不与球拍碰撞，球始终会弹跳

问题描述

总体而言，我对编程并不陌生，这是我的第二场比赛，因此提前对不起。我现在只用一个球拍打了一个乒乓球比赛，但是即使不打球，球也会不断弹跳。这是我的抽奖球功能：

    def draw_ball(self): 
        self.sc.blit(ball,(self.bx,self.by))
        self.bx += self.speedx
        self.by += self.speedy

        if self.bx >= 1000:#check goals
            self.bx = 250
            self.by = 340

        if self.bx <= 38: #check coalision
            self.speedx *= -1
        if self.by<= 12: 
            self.speedy *= -1
        if  self.by>= 725: 
            self.speedy *= -1
        
        #check coalision with the paddle 
        #px and py are the coordinates of the paddle 
        if self.bx > (self.px - 35) and (self.by < (self.py + 196) and  (self.by + 38) > self.py) : 
            self.speedx *= -1

这是主循环：

#global variables
WIN_HEIGHT = 1024 
WIN_WIDTH = 768 
SPEED = 5 
PX = 956
PY  = 320 
MOVEMENT = 5
BALL = Ball(550,60,screen,.5,.4,PX,PY)


running = True 
while running: 

  redraw_screen()

  for event in pygame.event.get():
    if event.type == pygame.QUIT:
      running = False
    mouse_pos = pygame.mouse.get_pos()
    if event.type == pygame.MOUSEBUTTONDOWN and START_BUTTON.is_clicked(mouse_pos):
      running = False
      playing = True

     while playing: 
        screen.fill((0,0))
        BALL.draw_ball()
        PLAYER.draw_player()
        pygame.display.flip()

        for event in pygame.event.get():
          if event.type == pygame.QUIT:
            running = False
            playing = False

感谢您的帮助。

解决方法

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pong pygame python