壁球小游戏详解（附有源码.cpp）

1.在python中安装pygame
2.将下列源码复制过去，运行。

#引用
import pygame, sys
#初始化
pygame.init()
size = width, height = 600, 400
speed = [1, 1]
BLACK = 0, 0, 0
screen = pygame.display.set_mode(size)
pygame.display.set_caption(“Pygame壁球”)
ball = pygame.image.load(“PYG02-ball.gif”)
ballrect = ball.get_rect()
fps = 300
fclock = pygame.time.Clock()
#事件处理
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
speed[0] = speed[0] if speed[0] == 0 else (abs(speed[0]) - 1)* int(speed[0]/abs(speed[0]))
elif event.key == pygame.K_RIGHT:
speed[0] = speed[0] + 1 if speed[0] > 0 else speed[0] - 1
elif event.key == pygame.K_UP:
speed[1] = speed[1] + 1 if speed[1] > 0 else speed[1] - 1
elif event.key == pygame.K_DOWN:
speed[1] = speed[1] if speed[1] == 0 else (abs(speed[1]) - 1)* int(speed[1]/abs(speed[1]))
ballrect = ballrect.move(speed[0], speed[1])
if ballrect.left < 0 or ballrect.right > width:
speed[0] = - speed[0]
if ballrect.top < 0 or ballrect.bottom > height:
speed[1] = - speed[1]
#窗口刷新
screen.fill(BLACK)
screen.blit(ball, ballrect)
pygame.display.update()
fclock.tick(fps)

↑： 纵向绝对速度增加1个像素{纵向加速}
↓： 纵向 {纵向减速}
←：横向 {横向减速}
→：横向 {横向加速}