python pygame实现滚动横版射击游戏城市之战

pygame城市之战横版射击游戏,按上下左右方向箭头操作飞机。这是一个横板射击小游戏,在黑夜的城市上空,你将要操作一架飞机去射击敌机,爆炸效果还不错。

在游戏中定义了滚动的背景类，定义了飞机类Plane，定义了子弹类，敌机类，爆炸类等，是学习Pygame和面向对象编程的好例子。

代码：

import math
import time
import pygame
from pygame.locals import *
from random import choice,randint

class ScrolledBackground(pygame.sprite.Sprite):
  def __init__(self,image,screen):
    pygame.sprite.Sprite.__init__(self)
    self.screen = screen
    self.width = screen.get_width()
    self.height = screen.get_height()
    self.image0 = pygame.image.load(image).convert_alpha()
    self.image1 = pygame.image.load(image).convert_alpha()

    self.rect0 = self.image0.get_rect()
    self.rect1 = self.image1.get_rect()
    self.rect1.left = self.rect0.right
    self.dx = -10
    self.dy = 0

  def update(self):
    pass

  def draw(self):
    pass

class Plane(pygame.sprite.Sprite):
  def __init__(self,image,keys,screen):
    pygame.sprite.Sprite.__init__(self)
    self.keys = keys          # 上下左右按键
    self.image = pygame.image.load(image).convert_alpha()
    self.screen = screen
    self.rect = self.image.get_rect()
    self.rect.centery = self.screen.get_height()//2
    self.xspeed = 0
    self.yspeed = 0
    self.dead = False         # 新增加的属性

  def keys_check(self,all_keys):
    pass

  def update(self):
    self.rect.move_ip(self.xspeed,self.yspeed)

  def draw(self):
    self.screen.blit(self.image,self.rect)

class Bullet(pygame.sprite.Sprite):
  def __init__(self,image,plane,group,screen):
    pygame.sprite.Sprite.__init__(self)
    self.plane = plane
    self.image = pygame.image.load(image).convert_alpha()
    self.rect = self.image.get_rect()
    self.rect.center = plane.rect.center
    self.group = group
    self.group.add(self)
    self.screen = screen
    self.screen_width = screen.get_width()
    self.screen_height = screen.get_height()    

  def update(self):
    self.rect.move_ip(10,0)
    if self.rect.left > self.screen_width :
      self.group.remove(self)

def split_images(image,rows,cols):
  """image是一张图片,把它切分为若干图,返回列表"""
  global explosion_images_list
  image = pygame.image.load(image)
  step_width = image.get_width()//cols
  step_height = image.get_height()//rows

  pass     

class Explosion(pygame.sprite.Sprite):
  """爆炸效果类，显示一系列帧图"""
  def __init__(self,surimages,position,group):
    pygame.sprite.Sprite.__init__(self)
    self.surimages = surimages            # 爆炸效果用到的surface列表
    self.index = 0
    self.amounts = len(surimages)
    self.image = self.surimages[self.index]     # 初始造型
    self.rect = self.image.get_rect()        # 矩形对象
    self.rect.center = position           # 爆炸位置
    self.group = group
    self.group.add(self)
    self.interval_time = 0.01            # 造型切换时间
    self.begin_time = time.time()          # 爆炸起始时间

  def update(self):                  # 换造型

    if time.time() - self.begin_time >= self.interval_time: # 超时，则换造型
      if self.index < self.amounts:
        self.image = self.surimages[self.index]
        self.index = self.index + 1
        self.begin_time = time.time()
      else:
        self.group.remove(self)         # 造型切换完了则从组中移除自己

class Enemy(pygame.sprite.Sprite):
  def __init__(self,images,group,screen):
    """images是surface列表"""
    pygame.sprite.Sprite.__init__(self)
    self.screen = screen
    self.screen_width = self.screen.get_width()   # 获取屏幕宽度
    self.screen_height = self.screen.get_height()  # 获取屏幕高度
    self.image = choice(images)           # 随机选择一个surface
    self.rect = self.image.get_rect()
    self.rect.left = self.screen_width + randint(10,self.screen_width)
    self.rect.centery = randint(0,self.screen_height)
    self.group = group
    self.group.add(self)              # 加入到自己的组
  def update(self):
    self.rect.move_ip(-5,0)
    if self.rect.right <= 0 :
      self.group.remove(self)

class Eullet(pygame.sprite.Sprite):
  """敌方子弹类"""
  def __init__(self,image,selfgroup,enemy_group,plane,screen):
    """参数列表：image，已转换成surface的对象
           selfgroup，所在的组
           enemy_group，敌人组.
           plane，我方飞机
           screen，屏幕对象
    """
    pass

  def update(self):
    self.rect.move_ip(-self.dx//30,-self.dy//30)
    if self.beyond_edge() :
      self.group.remove(self)

  def beyond_edge(self):
    pass

def collision_check():
  """对游戏中的对象进行碰撞检测,碰撞检测有以下几种：
    1、我方飞机碰到敌方飞机，都爆炸。给我方飞机增加dead属性。
    2、我方飞机碰到敌方子弹，我方飞机爆炸，游戏结束。
    3、敌方飞机碰到我方子弹，敌方飞机爆炸。
    以下引用的是全局变量
  """
  global enemy_counter
  "我方飞机和敌方飞机任何一架的碰撞"
  if not plane1.dead:
    eny = pygame.sprite.spritecollideany(plane1, group_enemy)
    if eny!=None :                             # 碰到了，我方飞机死，游戏结束
      Explosion(explosion_images_list,eny.rect.center,group_explosion)  # 在敌方飞机处发生爆炸
      Explosion(explosion_images_list,plane1.rect.center,group_explosion) # 在我方飞机处发生爆炸
      plane1.dead = True
      group_enemy.remove(eny)                       # 从敌方组中移除碰撞的敌机

  "我方飞机碰到敌方子弹，我方死，游戏结束。"
  if not plane1.dead:
    b = pygame.sprite.spritecollideany(plane1, group_enemy_bullet)
    if b!=None :                             # 碰到了，我方飞机死，游戏结束
      Explosion(explosion_images_list,plane1.rect.center,group_explosion) # 在我方飞机处发生爆炸
      plane1.dead = True

  "敌方飞机碰到我方子弹，我方子弹爆，敌方爆炸"
  result_dict = pygame.sprite.groupcollide(group_bullet1, group_enemy, True, True) # 一颗子弹可能打到几架飞机
  if result_dict !={}:
    missle = list(result_dict.keys())[0]                   # 碰到我方子弹
    enemy_list = result_dict[missle]
    #Explosion(explosion_images_list,missle.rect.center,group_explosion)
    enemy_counter += len(enemy_list)             # 大于一定的数量，如果我方战机没死，则成功结束
    for e in enemy_list: Explosion(explosion_images_list,e.rect.center,group_explosion)

    pygame.display.set_caption("风火轮少儿编程_城市之战射击游戏，当前打爆敌机数：" + str(enemy_counter) + "，请自行编写游戏成功结束的代码！")

if __name__ == "__main__":

  width,height = 480,360
  enemy_bullet = "images/bullet2.png"
  enemy_images = ["images/enemy0.png","images/enemy1.png","images/enemy2.png","images/enemy3.png"]
  explosion_images = "images/explosion.png"
  image = "images/night city with street.png"
  plane_image1 = "images/plane.png"
  bullet_image1 = "images/bullet.png"

  pygame.init()
  screen = pygame.display.set_mode((width,height))
  pygame.display.set_caption("城市之战,按上下左右操作飞机。风火轮少儿编程_www.scratch8.net")

  enemy_bullet = pygame.image.load(enemy_bullet)
  enemy_images = [pygame.image.load(img) for img in enemy_images]  # 形成敌机的surface列表
  explosion_images_list = []               # 爆炸效果surface列表
  explosion_images = split_images(explosion_images,2,13) # 按2行13列切分图形，返回surface列表

  keys1 = [K_UP,K_DOWN,K_LEFT,K_RIGHT]
  plane1 = Plane(plane_image1,keys1,screen)
  bg = ScrolledBackground(image,screen)
  running = True
  clock = pygame.time.Clock()

  bullet1_shoot_EVENT = USEREVENT + 1
  pygame.time.set_timer(bullet1_shoot_EVENT,500)

  "敌机定时生成事件"
  enemy_EVENT = USEREVENT + 2
  pygame.time.set_timer(enemy_EVENT,1000)

  "敌机定时发射子弹事件"
  enemy_shoot_EVENT = USEREVENT + 3
  pygame.time.set_timer(enemy_shoot_EVENT,50)

  group_explosion = pygame.sprite.Group()
  group_bullet1 = pygame.sprite.Group()
  group_enemy = pygame.sprite.Group()
  group_enemy_bullet = pygame.sprite.Group()
  enemy_amounts = 100             # 大于这个数量则游戏成功结束
  enemy_counter = 0
  while running:
    for event in pygame.event.get():
      if event.type == QUIT:
        running = False
        break
      if event.type == bullet1_shoot_EVENT: # 我方子弹1发射事件
        if not plane1.dead:
          Bullet(bullet_image1,plane1,group_bullet1,screen)
      if event.type == enemy_EVENT:     # 定时生成一架敌机
        Enemy(enemy_images,group_enemy,screen)

      if event.type == enemy_EVENT:     # 定时生成一枚敌机子弹
        Eullet(enemy_bullet,group_enemy_bullet,group_enemy,plane1,screen)

    all_keys = pygame.key.get_pressed()  # 所有按键检测
    plane1.keys_check(all_keys)      # 对plane1进行按键检测

    bg.update()              # 更新背景坐标
    group_bullet1.update()        # 我方子弹更新
    if not plane1.dead :
      plane1.update()          # 飞机1坐标更新
    group_enemy.update()         # 敌机坐标
    group_enemy_bullet.update()      # 敌机子弹更新
    group_explosion.update()       # 爆炸效果更新

    "坐标都更新完后，应该进行碰撞检测"
    collision_check()

    screen.fill((0,0,0))
    bg.draw()
    group_bullet1.draw(screen)
    if not plane1.dead :
      plane1.draw()
    group_enemy.draw(screen)
    group_enemy_bullet.draw(screen)
    group_explosion.draw(screen)
    pygame.display.update()
    clock.tick(30)
  pygame.quit()

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