星空飞碟大战

用python精灵模块制作的一款射击小游戏,有可滚动的向下背景,以衬托飞机向上飞行.

"""
   星空飞碟大战.py
   由于配音需要混音器,这里用到了pygame的混音器,
   所以本程序需要pygame支持,安装方法为在命令提示符里输入:pip install pygame --user
   
"""
from sprites import *
import pygame.mixer

def star_move():
  """动态星空背景函数"""
  for star in stars:
    star.move(0,-20)
    if star.ycor() < -height//2:
      x = random.randint(-width//2,width//2)
      y = random.randint(10+height//2,height*2)
      star.reborn(x,y,0,-20)

def spawn_enemy():
  """不定时产生敌机函数"""
  if random.randint(1,10)==1 and len(enemys)<10:
    x = random.randint(-200,200)
    y = random.randint(100,300)
    enemy = Sprite(shape='res/ufo.png',visible=False,pos=(x,y),tag='enemy')
    enemy._rotatemode = 1
    enemy.scale(0.5)
    enemy.setheading(random.randint(1,360))
    enemy.show()

def enemymove():
  """飞碟的移动"""  
  for e in enemys:
    e.fd(3)    
    # 设定一定的机率让ufo朝向player
    if random.randint(10,100) == 10 and \
       abs(e.xcor())<200 and abs(e.ycor()<250):
      e.heading(player)
    
    e.bounce_on_edge()
      
def bulletmove():
  """子弹的移动"""  
  for b in list(bullets):
     b.move(0,10)
     if b.collide_edge():b.remove()
     
def player_shoot():
  """玩家射击函数"""
  if player.alive == False : return 
  if m1.down() and framecounter % 5 == 0 :
     b = Sprite(shape='circle',visible=False,tag='bullet')
     b.scale(0.5)
     b.color('yellow')    
     b.goto(player.pos())        # 移到player坐标
     b.show()                    # 显示子弹
     shoot.play()                # 播放射击声

# 播放背景音乐与生成声效对象
pygame.mixer.init()
pygame.mixer.music.load('audio/FrozenJam.ogg')
pygame.mixer.music.play(-1,0)
explosion = pygame.mixer.Sound('audio/expl3.wav')
shoot = pygame.mixer.Sound('audio/pew.wav')

width,height = 480,640
screen = Screen()               # 新建屏幕
screen.bgcolor('black')         # 屏幕背景色为黑
screen.setup(width,height)
screen.title("星空飞碟大战by李兴球")

screen.addshape('res/fighter.png')
screen.addshape('res/ufo.png')
frames = ['res/explosion0.png','res/explosion1.png']
[screen.addshape(frame) for frame in frames]

# 星星，用来做向下滚动背景,星星的移动也可以通过移动图章实现
# 这样可以有更多的星星。如果用克隆的话有数量限制,根据计算机配置不同而不同。
star = Sprite(shape='circle')
star.color('white')
star.scale(0.1)
stars = [star]
stars.extend([star.clone() for _ in range(20)])
for star in stars:
  x = random.randint(-width//2,width//2)
  y = random.randint(10+height//2,height*2)
  star.goto(x,y)

# 哭脸
cry = Sprite(shape='cry.png',visible=False)
cry.goto(0,100)

# 玩家
player = Sprite(shape='res/fighter.png',pos=(0,-200))
player.scale(0.65)
player.alive = True             # 表示player是活的

m1 = Mouse()                    # 鼠标左键检测实例
clock = Clock()                 # 实钟对象,用来控制fps
framecounter = 0
counter = 0                     # 统计击中的ufo数量
bullets = Group('bullet')       # 子弹组
enemys = Group('enemy')         # ufo敌人组


以下代码省略......

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