pygame 方向键控制小球

在最近的项目中,我初次接触了pygame模块,并通过学习资料掌握了如何利用方向键来控制小球的移动。

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最后一个项目用到了pygame,  对于模块不熟悉的我还是查询了一些资料介绍。


import sys
import pygame
from pygame.locals import *

def control_ball(event):
    speed = [x,y] =[0,0]# 设置相对位移
    speed_offset = 1 #小球的速度

# 如果事件的类型是 键盘输入,就根据方向键来求出速度的方向(默认是从左往右为1,从上往下为1)
    if event.type == KEYDOWN:
        if event.key == pygame.K_LEFT:
            speed[0] -= speed_offset
            print event.key

        if event.key == pygame.K_RIGHT:
            speed[0] = speed_offset
            print event.key

        if event.key == pygame.K_UP:
            speed[1] -= speed_offset
            print event.key


        if event.key == pygame.K_DOWN:
            speed[1] = speed_offset
            print event.key
#如果没有方向键的输入,则速度为0,小球不动
    if event.type in (pygame.K_UP, pygame.K_LEFT, pygame.K_RIGHT, pygame.K_DOWN):
        speed = [0,0]
     

    return speed
    

#主函数
def play_ball():
    pygame.init()#初始化
    window_size = Rect(0,0,800,640)#设置窗口的大小
    
  
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