python外星人入侵游戏代码大全-Python游戏编程外星人入侵（完整版）

importsysimportpygamefrom bullet importBulletfrom alien importAlienfrom time importsleepdefcheck_events(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets):#监视键盘和鼠标事件

for event inpygame.event.get():if event.type == pygame.QUIT: #关闭窗口退出

sys.exit()elif event.type ==pygame.KEYDOWN:

check_keydown_events(event,ai_settings,screen,ship,bullets)elif event.type ==pygame.KEYUP:

check_keyup_events(event,ship)elif event.type ==pygame.MOUSEBUTTONDOWN:

mouse_x, mouse_y=pygame.mouse.get_pos()

check_play_button(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets,mouse_x, mouse_y)defcheck_play_button(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets,mouse_x, mouse_y):"""在玩家单击Play按钮时开始游戏"""button_clicked=play_button.rect.collidepoint(mouse_x,mouse_y)if button_clicked and notstats.game_active:#重置游戏设置

ai_settings.initialize_dynamic_settings()#隐藏光标

pygame.mouse.set_visible(False)#重置游戏统计信息

stats.reset_stats()

stats.game_active=True#重置计分牌图像

sb.prep_score()

sb.prep_high_score()

sb.prep_level()

sb.prep_ships()#清空外星人列表和子弹列表

aliens.empty()

bullets.empty()#创建一群新的外星人，并让飞船居中

create_fleet(ai_settings,screen,ship,aliens)

ship.center_ship()defupdate_screen(ai_settings,screen,stats,sb,ship,aliens,bullets,play_button):'''更新屏幕上的图片，并切换到新屏幕'''screen.fill(ai_settings.bg_color)#设置背景颜色

ship.blitme() #绘制飞船

aliens.draw(screen)#循环子弹组里面的元素，进行绘制 为空时不执行

for bullet inbullets.sprites():

bullet.draw_bullet()#绘制子弹

#显示得分

sb.show_score()#如果游戏处于非活跃状态，就显示Play按钮

if notstats.game_active:

play_button.draw_button()#显示最新屏幕，擦拭旧屏幕

pygame.display.flip()#print('1')

defcheck_keydown_events(event,ai_settings,screen,ship,bullets):if event.key ==pygame.K_RIGHT:

ship.moving_right=Trueelif event.key ==pygame.K_LEFT:

ship.moving_left=Trueelif event.key ==pygame.K_SPACE:

fire_bullet(ai_settings,screen,ship,bullets)elif event.key ==pygame.K_q:

sys.exit()defcheck_keyup_events(event,ship):if event.key ==pygame.K_RIGHT:

ship.moving_right=Falseelif event.key ==pygame.K_LEFT:

ship.moving_left=Falsedefupdate_bullets(ai_settings,screen,stats,sb,ship,aliens,bullets):'''更新子弹位置，删除子弹'''bullets.update()#子弹组每个成员执行self.update()操作

for bullet inbullets.sprites():if bullet.rect.bottom <= 0: #子弹出界 删除

bullets.remove(bullet)

check_bullet_alien_collisions(ai_settings,screen,stats,sb,ship,aliens,bullets)defcheck_bullet_alien_collisions(ai_settings,screen,stats,sb,ship,aliens,bullets):"""响应外星人和子弹的碰撞"""

#删除发生碰撞的子弹和外星人

collisions =pygame.sprite.groupcollide(bullets,aliens,True,True)ifcollisions:for aliens incollisions.values():

stats.score+= ai_settings.alien_points *len(aliens)

sb.prep_score()

check_high_score(stats,sb)if len(aliens)==0:#删除现有的子弹并新建一群外星人,加快游戏进度节奏

bullets.empty()

ai_settings.increase_speed()#提高等级

stats.level += 1sb.prep_level()

create_fleet(ai_settings,screen,ship,aliens)defupdate_ship(ship):

ship.update()deffire_bullet(ai_settings,screen,ship,bullets):#创建一个子弹对象 加入到子弹组

if len(bullets) < ai_settings.bullets_allowed: #子弹少于允许值时再生成

new_bullet =Bullet(ai_settings, screen, ship)

bullets.add(new_bullet)defget_number_aliens_x(ai_settings,alien_width):"""计算每行可容纳多少个外星人"""available_space_x= ai_settings.screen_width - 2 *alien_width

number_aliens_x= int(available_space_x / (2 *alien_width))returnnumber_aliens_xdefget_number_rows(ai_settings,ship_height,alien_height):"""计算屏幕可容纳多少行外星人"""available_space_y= (ai_settings.screen_height - (3 * alien_height) -ship_height)

number_rows= int(available_space_y / (2 *alien_height))returnnumber_rowsdefcreate_aliens(ai_settings,screen,aliens,alien_number,row_number):"""创建一个外星人并将其放在当期行"""alien=Alien(ai_settings,screen)

alien_width=alien.rect.width

alien.x= alien_width + 2 * alien_width *alien_number

alien.rect.x=alien.x

alien.rect.y= alien.rect.height + 2 * alien.rect.height *row_number

aliens.add(alien)defcreate_fleet(ai_settings,screen,ship,aliens):"""创建外星人群"""

#创建一个外星人，并计算一行可以容纳多少个外星人

#外星人间距为外星人宽度

alien =Alien(ai_settings,screen)

number_aliens_x=get_number_aliens_x(ai_settings,alien.rect.width)

number_rows=get_number_rows(ai_settings,ship.rect.height,alien.rect.height)#创建第一行外星人

for row_number inrange(number_rows):for alien_number inrange(number_aliens_x):#创建一个外星人并将其加入当前行

create_aliens(ai_settings,screen,aliens,alien_number,row_number)defcheck_fleet_edges(ai_settings,aliens):"""有外星人到达边缘时采取相应措施"""

for alien inaliens.sprites():ifalien.check_edges():

change_fleet_direction(ai_settings,aliens)break

defchange_fleet_direction(ai_settings,aliens):"""将整群外星人下移，并改变他们的运动方向"""

for alien inaliens.sprites():

alien.rect.y+=ai_settings.fleet_drop_speed

ai_settings.fleet_direction*= -1

defship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets):"""响应被外星人撞到的飞船"""

if stats.ships_left >0:#将ship_left减1

stats.ships_left -= 1

#更新记分牌

sb.prep_ships()#清空外星人列表和子弹列表

aliens.empty()

bullets.empty()#创建一群新的外星人，并将飞船放到屏幕低端中央

create_fleet(ai_settings,screen,ship,aliens)

ship.center_ship()#暂停

sleep(0.5)else:

stats.game_active=False

pygame.mouse.set_visible(True)defcheck_aliens_bottom(ai_settings,stats,screen,sb,ship,aliens,bullets):"""检查是否有外星人到达屏幕低端"""screen_rect=screen.get_rect()for alien inaliens.sprites():if alien.rect.bottom >=screen_rect.bottom:#像飞船被撞到一样进行处理

ship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets)break

defupdate_aliens(ai_settings,stats,screen,sb,ship,aliens,bullets):"""更新外星人群中所有外星人的位置"""check_fleet_edges(ai_settings,aliens)

aliens.update()#检测外星人和飞船之间的碰撞

ifpygame.sprite.spritecollideany(ship,aliens):

ship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets)#检查是否有外星人到达屏幕低端

check_aliens_bottom(ai_settings,stats,screen,sb,ship,aliens,bullets)defcheck_high_score(stats,sb):"""检查是否诞生了新的最高纪录"""

if stats.score >stats.high_score:

stats.high_score=stats.score

sb.prep_high_score()