Python外星人入侵小游戏源代码

import sys from time import sleep import pygame from bullet import Bullet from alien import Alien def cheak_keydowen_events(event, ai_settings, screen, ship, bullets): """响应按键""" if event.key == pygame.K_RIGHT: ship.moving_right = True elif event.key == pygame.K_LEFT: ship.moving_left = True elif event.key == pygame.K_SPACE: fire_bullet(ai_settings, screen, ship, bullets) elif event.key == pygame.K_q: sys.exit() def fire_bullet(ai_settings, screen, ship, bullets): """如果还没到达限制，就发射一颗子弹""" # 创建一颗子弹，并将其加入到编组bullets中 if len(bullets) < ai_settings.bullets_allowed: news_bullet = Bullet(ai_settings, screen, ship) bullets.add(news_bullet) def cheak_keyup_events(event, ship): """响应松开""" if event.key == pygame.K_RIGHT: ship.moving_right = False elif event.key == pygame.K_LEFT: ship.moving_left = False def cheak_events(ai_settings, screen, stats, sb, play_button, ship, aliens, bullets): """响应按键和鼠标事件""" for event in pygame.event.get(): if event.type == pygame.QUIT: sys.exit() elif event.type == pygame.KEYDOWN: cheak_keydowen_events(event, ai_settings, screen, ship, bullets) elif event.type == pygame.KEYUP: cheak_keyup_events(event, ship) elif event.type == pygame.MOUSEBUTTONDOWN: mouse_x, mouse_y = pygame.mouse.get_pos() cheak_play_button(ai_settings, screen, stats, sb, play_button, ship, aliens, bullets, mouse_x, mouse_y) def cheak_play_button(ai_settings, screen, stats, sb, play_button, ship, aliens, bullets, mouse_x, mouse_y): """在玩家单击play按钮时开始新游戏""" bullets_clicked = play_button.rect.collidepoint(mouse_x, mouse_y) if bullets_clicked and not stats.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 # 重置记分牌对象 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() def update_screen(ai_settings, screen, stats, sb, ship, aliens, bullets, play_button): """更新屏幕上的图像，并切换到新屏幕""" # 每次循环都重绘屏幕 screen.fill(ai_settings.bg_color) # 在飞船和外星人后面重绘所有子弹 for bullet in bullets.sprites(): bullet.draw_bullet() ship.blitme() aliens.draw(screen) # 显示得分 sb.show_score() # 如果游戏处于非活动状态，就绘制play按钮 if not stats.game_active: play_button.draw_button() # 让最近绘制的屏幕可见 pygame.display.flip() def update_bullets(ai_settings, screen, stats, sb, ship, aliens, bullets): """更新子弹的位置，并删除已消失子弹""" # 更新子弹位置 bullets.update() # 删除已消失的子弹 for bullet in bullets.copy(): if bullet.rect.bottom <= 0: bullets.remove(bullet) cheak_bullets_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets) def cheak_bullets_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets): """响应子弹和外星人碰撞""" # 删除发生碰撞的子弹和外星人 collections = pygame.sprite.groupcollide(bullets, aliens, True, True) if collections: for aliens in collections.values(): stats.score += ai_settings.alien_points * len(aliens) sb.prep_score() cheak_high_score(stats, sb) if len(aliens) == 0: # 如果整群外星人都被消灭，就提高一个等级 # 删除现有的子弹,加快游戏节奏，并创建一群新的外星人 bullets.empty() ai_settings.increase_speed() # 提高等级 stats.level += 1 sb.prep_level() create_fleet(ai_settings, screen, ship, aliens) def get_number_alien_x(ai_settings, alien_width): """计算每行可容纳多少外星人""" available_space_x = ai_settings.screen_width - 2 * alien_width number_alien_x = int(available_space_x / (2 * alien_width)) return number_alien_x def get_number_rows(ai_settings, ship_height, alien_height): """计算屏幕可容纳多少行机器人""" available_space_y = (ai_settings.screen_height - (3 * alien_height) - ship_height) number_rows = int(available_space_y / (2 * alien_height)) return number_rows def create_alien(ai_settings, screen, aliens, alien_number, row_number): # 创建第一行外星人并将其加入当前行 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) def create_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_alien_x = get_number_alien_x(ai_settings, alien.rect.width) number_rows = get_number_rows(ai_settings, ship.rect.height, alien.rect.height) # 创建外星人群 for row_number in range(number_rows): for alien_number in range(number_alien_x): create_alien(ai_settings, screen, aliens, alien_number, row_number) def cheak_fleet_edges(ai_settings, aliens): """有外星人到达屏幕边缘时采取相应的措施""" for alien in aliens.sprites(): if alien.cheak_edgs(): change_fleet_direction(ai_settings, aliens) break def change_fleet_direction(ai_settings, aliens): """将整群外星人下移，并改变它们的位置""" for alien in aliens.sprites(): alien.rect.y += ai_settings.fleet_drop_speed ai_settings.fleet_direction *= -1 def ship_hit(ai_settings, screen, stats, sb, ship, aliens, bullets): """响应被外星人撞到的飞船""" if stats.ships_left > 0: # 将ships_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，并将飞船放在屏幕底端中央 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) def cheak_aliens_bottom(ai_settings, screen, stats, sb, ship, aliens, bullets): """检查是否有外星人到达了屏幕底端""" screen_rect = screen.get_rect() for alien in aliens.sprites(): if alien.rect.bottom >= screen_rect.bottom: # 像飞船被撞到一样进行处理 ship_hit(ai_settings, screen, stats, sb, ship, aliens, bullets) break def update_aliens(ai_settings, screen, stats, sb, ship, aliens, bullets): """检查是否有外星人位于屏幕边缘，并更新整群外星人的位置""" cheak_fleet_edges(ai_settings, aliens) aliens.update() # 检查外星人和飞船之间的碰撞 if pygame.sprite.spritecollideany(ship, aliens): ship_hit(ai_set