#导入Bomb类fromBomb import Bomb
#修改代码
def update_bullets(ai_settings, screen, stats, sb, ship, aliens, bullets,bomb):"""更新子弹的位置，并删除已消失的子弹"""# 更新子弹的位置
bullets.update()
# 删除已消失的子弹for bullet inbullets.copy():if bullet.rect.bottom <= 0:
bullets.remove(bullet)
check_bullet_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets,bomb)
def check_bullet_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets,bomb):
# 检查是否有子弹击中了外星人
# 如果是这样，就删除相应的外星人和子弹""" 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)""" for bullet inbullets:
# 检查子弹与飞机的碰撞，及击中飞机
collisions=pygame.sprite.groupcollide(aliens, bullets, True, True)ifcollisions:
current_pos=pygame.Vector2(bullet.rect.x, bullet.rect.y)ifbullet.rect.collidepoint(current_pos):
bomb.position[0] = (bullet.rect.x - 20)
bomb.position[1] = (bullet.rect.y - 40)
bomb.visible=Trueif len(aliens) == 0:
# 删除现有的子弹, 加快游戏节奏，并新建一群外星人
bullets.empty()
ai_settings.increase_speed()
# 提高等级
stats.level+= 1sb.prep_level()
create_fleet(ai_settings, screen, ship, aliens)
def update_aliens(ai_settings, screen, stats, sb, ship, aliens, bullets,bomb):"""检查是否有外星人到达屏幕边缘
然后更新外星人群中的所有外星人位置"""bomb.action()
check_fleet_edges(ai_settings, aliens)
check_alien_bottom(ai_settings, screen, stats, sb, ship, aliens, bullets)
aliens.update()
# 检测外星人和飞船之间的碰撞ifpygame.sprite.spritecollideany(ship, aliens):
ship_hit(ai_settings, screen, stats, sb, ship, aliens, bullets)
def update_screen(ai_settings, screen, stats, sb, ship, aliens, bullets, play_button,introduce_button,bomb):"""更新屏幕上的图像，并切换到新屏幕"""# 每次循环时都重绘屏幕
screen.fill(ai_settings.bg_color)
# 在飞船和外星人后面重绘所有子弹for bullet inbullets.sprites():
bullet.draw_bullet()
ship.blitme()
aliens.draw(screen)
# 绘制爆炸图片
# # 绘制爆炸图片
#self.bomb.draw()
bomb.draw()
# 显示得分
sb.show_score()
# 如果游戏处于非活动状态，就绘制Play按钮ifnot stats.game_active:
play_button.draw_button()
introduce_button.drawintroduce_button()
# 让最近绘制的屏幕可见
pygame.display.flip()
