pygame学习笔记（6）：完成一个简单的游戏

学了这么长时间的Pygame，一直想写个游戏实战一下。看起来很简单的游戏，写其来怎么这么难。最初想写个俄罗斯方块，想了很长时间如何实现，想来想去，也没写出来，于是干脆下载别人的代码来读。后来，要想写一个帮助记忆的挖宝箱的游戏，结果也没完成。唯一完成了就是下面这个小人接金币的游戏，超级简单，通过左右键控制小人移动去接空中下来的金币，接住金币得5分，接不住游戏结束，金币速度会随着level的关数而越来越快。完成这段代码后，我依然觉得这段代码写得很差，确实也是自己对pygame只是掌握了皮毛，对surface、sprite这些理解的还不透彻。这里把代码写出来，有时间的大牛们可以帮助指点一下，让我也有所提高。

# -*- coding: cp936 -*-
'''
一个超级简单的游戏
左右键控制小人移动去接空中下来的金币，接住金币得5分，接不住游戏结束，金币速度会随着level的关数
而越来越快
'''
import pygame,sys,os,random
pygame.init()

class rect():#画出小人
  def __init__(self,filename,initial_position):
    self.image=pygame.image.load(filename)
    self.rect=self.image.get_rect()
    self.rect.topleft=initial_position

class goldrect(pygame.sprite.Sprite):#绘出金币
  def __init__(self,gold_position,speed):
    pygame.sprite.Sprite.__init__(self)
    self.image=pygame.image.load('image\\gold.png')
    self.rect=self.image.get_rect()
    self.rect.topleft=gold_position
    self.speed=speed
  def move(self):
    self.rect=self.rect.move(self.speed)

def drawback(): #绘出背景图片
  my_back=pygame.image.load('image\\qi3.jpg')
  bakscreen.blit(my_back,[0,0])

def loadtext(levelnum,score,highscore):#绘出成绩、level、最高分等
  my_font=pygame.font.SysFont(None,24)
  levelstr='Level:'+str(levelnum)
  text_screen=my_font.render(levelstr, True, (255, 0, 0))
  bakscreen.blit(text_screen, (650,50))
  highscorestr='Higescore:'+str(highscore)
  text_screen=my_font.render(highscorestr, True, (255, 0, 0))
  bakscreen.blit(text_screen, (650,80))
  scorestr='Score:'+str(score)
  text_screen=my_font.render(scorestr, True, (255, 0, 0))
  bakscreen.blit(text_screen, (650,110))  

def loadgameover(scorenum,highscore):#绘出GAME OVER
  my_font=pygame.font.SysFont(None,50)
  levelstr='GAME OVER'
  over_screen=my_font.render(levelstr, True, (255, 0, 0))
  bakscreen.blit(over_screen, (300,240))
  highscorestr='YOUR SCORE IS '+str(scorenum)
  over_screen=my_font.render(highscorestr, True, (255, 0, 0))
  bakscreen.blit(over_screen, (280,290))
  if scorenum>int(highscore):#写入最高分
    highscorestr='YOUR HAVE GOT THE HIGHEST SCORE!'
    text_screen=my_font.render(highscorestr, True, (255, 0, 0))
    bakscreen.blit(text_screen, (100,340))
    highfile=open('highscore','w')
    highfile.writelines(str(scorenum))
    highfile.close() 

def gethighscore(): #读取最高分
  if os.path.isfile('highscore'):
    highfile=open('highscore','r')
    highscore=highfile.readline()
    highfile.close()
  else:
    highscore=0
  return highscore

bakscreen=pygame.display.set_mode([800,600])
bakscreen.fill([0,160,233])
pygame.display.set_caption('Dig!Dig!')
drawback()

levelnum=1 #level
scorenum=0 #得分
highscore=gethighscore()#最高分
ileft=1 #记录向左移动步数，用来控制图片
iright=10 #记录向右移动步数，用来控制图片
x=100
y=450
filename='image\\1.png'
backimg_ren=rect(filename,[x,y])
bakscreen.blit(backimg_ren.image,backimg_ren.rect)
loadtext(levelnum,scorenum,highscore)
goldx=random.randint(50,580)
speed=[0,levelnum]
mygold=goldrect([goldx,100],speed)
pygame.display.update()

while True:
  if scorenum>0 and scorenum/50.0==int(scorenum/50.0):#当得分是50的倍数时修改level
    levelnum=scorenum/50+1
    speed=[0,levelnum]

  for event in pygame.event.get():
    if event.type==pygame.QUIT:
      sys.exit()
  #make gold  

  pressed_keys = pygame.key.get_pressed()
  if pressed_keys[pygame.K_LEFT]:#按下左键

    drawback()
    loadtext(levelnum,scorenum,highscore)

    if iright > 14 :iright=10
    iright=iright+1
    filename='image\\'+str(iright)+'.png'
    if x<50 :
      x=50
    else:
      x=x-10

    backimg_surface=rect(filename,[x,y])
    bakscreen.blit(backimg_surface.image,backimg_surface.rect)

  if pressed_keys[pygame.K_RIGHT]:#按下右键

    drawback()
    loadtext(levelnum,scorenum,highscore)

    if ileft > 4 :ileft=0
    ileft=ileft+1
    filename='image\\'+str(ileft)+'.png'
    if x>560:
      x=560
    else:
      x=x+10

    backimg_surface=rect(filename,[x,y])
    bakscreen.blit(backimg_surface.image,backimg_surface.rect)

  drawback()
  loadtext(levelnum,scorenum,highscore)
  mygold.move()
  bakscreen.blit(mygold.image,mygold.rect) 

  backimg_surface=rect(filename,[x,y])
  bakscreen.blit(backimg_surface.image,backimg_surface.rect)
  if mygold.rect.top>600:#判断金币是否着地，一但着地，游戏结束
    loadgameover(scorenum,highscore)
  if mygold.rect.colliderect(backimg_surface.rect):#判断金币是否与小人碰撞，如果碰撞表示小人接到金币
    scorenum+=5
    loadtext(levelnum,scorenum,highscore)
    goldx=random.randint(50,580)
    mygold=goldrect([goldx,100],speed)
  pygame.display.update()

程序中用到的资源可从这里下载：文件名：gold.7z, 访问地址：http://www.kuaipan.cn/file/id_16699292408348719.htm