使用pygame移动球体

Question

大家好，我正在用pygame开发一个弹跳球的游戏。我下载了一张图片 ball.jpg，用作球的图像，还有一张 bg.jpg，作为背景。我尝试移动这个球，但没有成功。我的代码是：

import pygame, sys
from pygame.locals import *
pygame.init()
clocks = pygame.time.Clock()
surfaceObject = pygame.display.set_mode((640, 480))
pygame.display.set_caption('Bounce')

mousey,mousex = 0,0
imgx = 10
imgy = 10
pixmove = 5
movement = 'down'


background = pygame.image.load('bg.jpg').convert()
ball = pygame.image.load('ball.jpg').convert_alpha()

sound = pygame.mixer.Sound('yeah.mp3')


while True:

if movement == 'down':
    imgx += pixmove
if imgy < 200:
    movement = 'right'

elif movement  == 'right':
    imgx += pixmove
if imgx < 200:
    movement = 'up'


elif movement == 'up':
    imgy -= pixmove
if imgy < 30:
    movement = 'left'


elif movement == 'left':
    imgx -= pixmove
if imgx < 30:
    movement = 'down'




for event in pygame.event.get():
    if event.type == QUIT:
        pygame.quit()
        sys.exit()


        surfaceObject.blit(background,(mousex,mousey))
        surfaceObject.blit(ball,(imgx,imgy))
        sound.Play()


    pygame.display.update()
    clocks.tick(50)

当我运行这段代码时，图像没有在pygame窗口中显示出来。我把 bounce.py 文件和我下载的两张图片放在同一个文件夹里。

我想在pygame窗口中移动这个球，并显示球的图像和背景图像。希望大家能帮帮我。提前谢谢你们！

Answer 1

修复了代码中的缩进问题：

import time                                              
import pygame, sys                                      
from pygame.locals import *                              
pygame.init()                                            
clocks = pygame.time.Clock()                            
surfaceObject = pygame.display.set_mode((640, 480))      
pygame.display.set_caption('Bounce')                    

mousey,mousex = 0,0                                      
imgx = 10                                                
imgy = 10                                                
pixmove = 5                                              
movement = 'down'                                        

background = pygame.image.load('bg.jpg').convert()      
ball = pygame.image.load('ball.jpg').convert_alpha()    
pygame.mixer.music.load('yeah.mp3')

while True:                                              
    time.sleep(1)                                        
    if movement == 'down':                              
        imgx += pixmove                                  
    if imgy < 200:                                      
        movement = 'right'                              

    elif movement  == 'right':                          
        imgx += pixmove                                  
    if imgx < 200:                                      
        movement = 'up'                                  


    elif movement == 'up':                              
        imgy -= pixmove                                  
    if imgy < 30:                                        
        movement = 'left'                                


    elif movement == 'left':                            
        imgx -= pixmove                                  
    if imgx < 30:                                        
        movement = 'down'                                
    print movement                                      
    print imgx                                          
    print imgy                                          

    for event in pygame.event.get():                    
        if event.type == QUIT:                          
            pygame.quit()                                
            sys.exit()                                  

    surfaceObject.blit(background,(mousex,mousey))      
    surfaceObject.blit(ball,(imgx,imgy))                
    pygame.mixer.music.play()
    pygame.display.update()                              
    clocks.tick(50)