Question

与许多初学python程序员一样，我决定编写一个乒乓球游戏。这是我的第二次尝试。第一个是硬编码，没有类和几个函数，所以我从头开始。我目前有一个paddle类和一个主循环。我已经编写了拨片上下移动的功能，但我遇到了问题。当我按下按键移动拨片时，只是向上和向下延伸，它们实际上并没有移动。这是我到目前为止的代码：

#PONG GAME IN PYTHON WITH PYGAME

import pygame
import time

pygame.init()

white = (255, 244, 237)
black = (0, 0, 0)

largeFont = pygame.font.Font("pongFont.TTF", 75)
mediumFont = pygame.font.Font("pongFont.TTF", 50)
smallFont = pygame.font.Font("pongFont.TTF", 25)

displayWidth = 800
displayHeight = 600

gameDisplay = pygame.display.set_mode((displayWidth, displayHeight))
pygame.display.set_caption("Pong")

FPS = 60
menuFPS = 10
clock = pygame.time.Clock()

#Paddle Class
class Paddle:

    def __init__(self, player):

        self.length = 100
        self.width = 8
        self.yVelocity = 0
        self.y = (displayHeight - self.length) / 2

        #Puts player 1 paddle on left and player 2 on right
        if player == 1:
            self.x = 3 * self.width
        elif player == 2:
            self.x = displayWidth - 4 * self.width

    #Did paddle hit top or bottom?
    def checkWall(self):

        if self.y <= 0:
            return "top"
        elif self.y >= displayHeight - self.length:
            return "bottom"

    def stop(self):

        self.yVelocity = 0

    def moveUp(self):

        if self.checkWall() == "top":
            self.stop()
        else:
            self.yVelocity = -self.width

    def moveDown(self):

        if self.checkWall() == "bottom":
            self.stop()
        else:
            self.yVelocity = self.width

    #Draw the paddle
    def draw(self):

        self.y += self.yVelocity
        gameDisplay.fill(white, rect = [self.x, self.y, self.width,     self.length])

paddle1 = Paddle(1)
paddle2 = Paddle(2)

gameFinish = False

#Main Loop
while not gameFinish:

    #Event Loop
    for event in pygame.event.get():

        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

    #Get all pressed keys
    keyPressed = pygame.key.get_pressed()

    #Move paddle1 if s or w is pressed
    if keyPressed[pygame.K_w]:
        paddle1.moveUp()
    elif keyPressed[pygame.K_s]:
        paddle1.moveDown()
    else:
        paddle1.stop()

    #Move paddle2 if UP or DOWN is pressed
    if keyPressed[pygame.K_UP]:
        paddle2.moveUp()
    elif keyPressed[pygame.K_DOWN]:
        paddle2.moveDown()
    else:
        paddle2.stop()

    paddle1.draw()
    paddle2.draw()

    pygame.display.update()
    clock.tick(FPS)

提前感谢任何可以提供帮助的人！

Answer 1

之前清除屏幕，当旧拨片仍然存在时，您正在绘制新的拨片。

使用gameDisplay.fill(white)之类的内容来清除屏幕。

Answer 2

这是因为你移动它时已经有了桨状精灵。实际上你要做的就是破坏旧桨，然后绘制旧桨，否则旧的桨仍然存在，当你创建新桨时，会产生合并效果。

使用Pygame在Python中制作Pong时遇到问题。当我移动时，桨叶伸展

2 个答案: