Python Turtle Pong 游戏碰撞检测优化：解决球拍意外反弹问题

if the_ball.distance(r_paddle) and the_ball.xcor() > 320 or the_ball.distance(l_paddle) < 50 and the_ball.xcor() < -320:
    the_ball.x_bounce()

# 碰撞检测条件修正
if the_ball.distance(r_paddle) < 50 and the_ball.xcor() > 320 or \
   the_ball.distance(l_paddle) < 50 and the_ball.xcor() < -320:
    the_ball.x_bounce()

from turtle import Screen, Turtle

# 屏幕实例，全局可访问，方便在类中调用 update
screen = Screen()

class Scoreboard(Turtle):
    def __init__(self):
        super().__init__()
        self.hideturtle()
        self.color('white')
        self.penup()
        self.l_score = 0
        self.r_score = 0
        self.update_score()

    def update_score(self):
        self.clear()
        self.goto(-100, 200)
        self.write(self.l_score, align='center', font=('Courier', 80, 'normal'))
        self.goto(100, 200)
        self.write(self.r_score, align='center', font=('Courier', 80, 'normal'))
        screen.update() # 每次分数更新时刷新屏幕

    def left_point(self):
        self.l_score += 1
        self.update_score()

    def right_point(self):
        self.r_score += 1
        self.update_score()

class Ball(Turtle):
    def __init__(self):
        super().__init__()
        self.shape('circle')
        self.color('white')
        self.penup() # 确保不画线
        self.x_move = 10
        self.y_move = 10

    def move(self):
        new_x = self.xcor() + self.x_move
        new_y = self.ycor() + self.y_move
        self.goto(new_x, new_y)
        screen.update() # 每次球移动时刷新屏幕

    def y_bounce(self):
        self.y_move *= -1

    def x_bounce(self):
        self.x_move *= -1

    def reset_position(self):
        self.goto(0, 0)
        self.x_bounce() # 重置后球反向移动
        screen.update() # 重置位置后刷新屏幕

class Paddle(Turtle):
    def __init__(self):
        super().__init__()
        self.shape('square')
        self.color('white')
        self.shapesize(stretch_wid=5, stretch_len=1) # 默认朝向右，这里设置宽5高1
        self.penup()
        # 可以设置朝向，然后使用 forward/backward
        # self.setheading(90) # 让其朝上，这样 forward/backward 就是上下移动

    def go_up(self):
        new_y = self.ycor() + 20
        self.goto(self.xcor(), new_y)
        screen.update() # 每次球拍移动时刷新屏幕

    def go_down(self):
        new_y = self.ycor() - 20
        self.goto(self.xcor(), new_y)
        screen.update() # 每次球拍移动时刷新屏幕

# 游戏初始化
screen.setup(width=800, height=600)
screen.bgcolor('black')
screen.title("My PONGIE")
screen.tracer(0) # 关闭自动屏幕更新

r_paddle = Paddle()
r_paddle.goto(350, 0) # 右球拍

l_paddle = Paddle()
l_paddle.goto(-350, 0) # 左球拍

the_ball = Ball()
score = Scoreboard()

# 键盘监听
screen.listen()
screen.onkey(r_paddle.go_up, 'Up')
screen.onkey(r_paddle.go_down, 'Down')
screen.onkey(l_paddle.go_up, 'w')
screen.onkey(l_paddle.go_down, 's')

# 游戏主循环函数
def play():
    the_ball.move()

    # 1. 碰撞上下墙壁检测
    if the_ball.ycor() > 280 or the_ball.ycor() < -280:
        the_ball.y_bounce()
    # 2. 碰撞球拍检测 (注意逻辑顺序和距离判断)
    elif (the_ball.distance(r_paddle) < 50 and the_ball.xcor() > 320) or \
         (the_ball.distance(l_paddle) < 50 and the_ball.xcor() < -320):
        the_ball.x_bounce()
    # 3. 球出右界 (左边得分)
    elif the_ball.xcor() > 380:
        the_ball.reset_position()
        score.left_point()
    # 4. 球出左界 (右边得分)
    elif the_ball.xcor() < -380:
        the_ball.reset_position()
        score.right_point()

    screen.ontimer(play, 10) # 每 10 毫秒调用一次 play，实现更流畅动画

# 初始屏幕更新，显示所有对象
screen.update()

# 启动游戏循环
play()

# 保持窗口打开直到关闭
screen.mainloop()