乒乓球小游戏——第1部分（python源代码）

第一部分程序运行结果

import turtle

import os

wn = turtle.Screen()

wn.title("PingPong")

wn.bgcolor("black")

wn.setup(width=800,height=600)

#wn.tracer(0) #stop the window from updating

paddle_a = turtle.Turtle()

paddle_a.speed(0)

paddle_a.shape("square")

paddle_a.color("white")

paddle_a.shapesize(stretch_wid=5,stretch_len=1)

paddle_a.up()

paddle_a.goto(-350,0)

paddle_b = turtle.Turtle()

paddle_b.speed(0)

paddle_b.shape("square")

paddle_b.color("white")

paddle_b.shapesize(stretch_wid=5,stretch_len=1)

paddle_b.up()

paddle_b.goto(350,0)

ball = turtle.Turtle()

ball.speed(0)

ball.shape("square")

ball.color("white")

ball.up()

ball.goto(0,0)

ball.dx = 3

ball.dy = -3

#动作函数

def paddle_a_up():

    y = paddle_a.ycor()

    y = y + 20

    paddle_a.sety(y)

def paddle_a_down():

    y = paddle_a.ycor()

    y = y - 20

    paddle_a.sety(y)

def paddle_b_up():

    y = paddle_b.ycor()

    y = y + 20

    paddle_b.sety(y)

def paddle_b_down():

    y = paddle_b.ycor()

    y = y - 20

    paddle_b.sety(y)

#监听

wn.listen()

#绑定键盘上的键

wn.onkeypress(paddle_a_up,"w")

wn.onkeypress(paddle_a_down,"s")

wn.onkeypress(paddle_b_up,"Up")

wn.onkeypress(paddle_b_down,"Down")

while True:

    wn.update()

    #移动球球

    ball.setx(ball.xcor()+ball.dx)

    ball.sety(ball.ycor()+ball.dy)

    #边界检测

    if ball.ycor() > 290:

        ball.sety(290)

        ball.dy = ball.dy * -1

    if  ball.ycor() < -290:

        ball.sety(-290)

        ball.dy = ball.dy * -1

    if ball.xcor() > 390:

        ball.goto(0, 0)

        ball.dx *= -1

    if ball.xcor() < -390:

        ball.goto(0, 0)

        ball.dx *= -1