python 小游戏飞机大战 根据《python编程从入门到实践》实现

import sys import pygame from bullet import Bullet from alien import Alien from time import sleep def check_keydown_events(event,ai_settings,screen,ship,bullets): 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_bullets(bullets, ai_settings, screen , ship) elif event.key == pygame.K_q: sys.exit() def fire_bullets(bullets, ai_settings, screen , ship): if len(bullets) < ai_settings.bullet_allowed: new_bullet = Bullet(ai_settings, screen , ship) bullets.add(new_bullet) def check_keyup_events(event,ship): if event.key == pygame.K_RIGHT: ship.moving_right = False elif event.key == pygame.K_LEFT: ship.moving_left = False def check_events(ai_settings,screen,stats,play_button,ship,bullets,aliens,sb): """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: 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(stats, play_button, mouse_x, mouse_y,ai_settings,screen,ship,aliens,bullets,sb) def check_play_button(stats, play_button, mouse_x, mouse_y,ai_settings,screen,ship,aliens,bullets,sb): button_clicked = play_button.rect.collidepoint(mouse_x,mouse_y) if button_clicked and not stats.game_active: ai_settings.initialize_dynamic_settings() #隐藏光标 pygame.mouse.set_visible(False) #重置游戏统计数据 stats.reset_stats() stats.game_active = True #重置记分牌数据 sb.prep_score() sb.prep_high_score() sb.prep_level() sb.prep_ship() #清空子弹和外星人 aliens.empty() bullets.empty() #创建新的外星人 create_fleet(aliens, ai_settings, screen , ship) ship.center_ship() def update_screen(ai_settings, screen, stats, ship,bullets,aliens, play_button, sb): """更新屏幕上的图像 切换到新屏幕""" screen.fill(ai_settings.screen_color) for bullet in bullets: bullet.draw_bullet() ship.blitme() aliens.draw(screen) sb.show_score() if not stats.game_active: play_button.draw_button() pygame.display.flip() def update_bulltes(ai_settings, screen, ship, aliens, bullets, stats, sb): #更新子弹的位置 bullets.update() #删除不在屏幕内的子弹 for bullet in bullets.copy(): if bullet.rect.bottom <= 0: bullets.remove(bullet) check_bullet_alien_collisions(ai_settings, screen, ship, aliens, bullets, stats, sb) def check_bullet_alien_collisions(ai_settings, screen, ship, aliens, bullets, stats, sb): collisons = pygame.sprite.groupcollide(bullets, aliens, True, True) if collisons: for aliens in collisons.values(): stats.score += ai_settings.alien_points * len(aliens) sb.prep_score() check_high_score(stats,sb) if len(aliens) == 0: #删除现有子弹 加快游戏节奏 创建新的外星人 bullets.empty() ai_settings.increase_speed() #提高等级 stats.level += 1 sb.prep_level() create_fleet(aliens, ai_settings, screen , ship) def update_aliens(ai_settings, stats, screen, ship, aliens, bullets, sb): #更新飞船的位置 check_fleet_edges(ai_settings, aliens) aliens.update() #监测飞船和外星人之间的碰撞 if pygame.sprite.spritecollideany(ship, aliens): ship_hit(ai_settings, stats, screen, ship, aliens, bullets, sb) print("ship hit!!!") check_aliens_bottom(ai_settings, stats, screen, ship, aliens, bullets, sb) def ship_hit(ai_settings, stats, screen, ship, aliens, bullets, sb): #剩余飞船数减1 if stats.ships_left > 0: stats.ships_left -=1 #更新飞船数 sb.prep_ship() #清空外星人和子弹列表 aliens.empty() bullets.empty() create_fleet(aliens, ai_settings, screen , ship) ship.center_ship() #暂停以让玩家发现发生了碰撞 sleep(0.5) else: stats.game_active = False pygame.mouse.set_visible(True) def create_fleet(aliens, ai_settings, screen , ship): new_alien = Alien(screen, ai_settings) number_alien_x = get_number_aliens_x(ai_settings, new_alien.rect.width) number_alien_y = get_number_aliens_y(ai_settings, new_alien.rect.height, ship.rect.height) for alien_number in range(1,number_alien_x): for row_number in range(1,number_alien_y): create_alien(ai_settings, screen, aliens, alien_number, row_number) def get_number_aliens_x(ai_settings, alien_width): available_space_x = ai_settings.screen_width - alien_width number_alien_x = int(available_space_x / 1.5 / alien_width) return number_alien_x def get_number_aliens_y(ai_settings, alien_height, ship_height): available_space_y = ai_settings.screen_height - 3 * alien_height - ship_height number_alien_y = int(available_space_y / alien_height) return number_alien_y def create_alien(ai_settings, screen, aliens, alien_number, row_number): new_alien = Alien(screen, ai_settings) new_alien.x = new_alien.rect.width * 1.5 * alien_number new_alien.rect.x = new_alien.x new_alien.rect.y = new_alien.rect.height * 1.5 * row_number aliens.add(new_alien) def change_fleet_direction(ai_settings, aliens): for alien in aliens.sprites(): alien.rect.y += ai_settings.fleet_drop_speed ai_settings.fleet_direction *= -1 def check_fleet_edges(ai_settings, aliens): for alien in aliens.sprites(): if alien.check_edge(): change_fleet_direction(ai_settings, aliens) break def check_aliens_bottom(ai_settings, stats, screen, ship, aliens, bullets, sb): """检查是否有外星人到达屏幕底部""" screen_rect = screen.get_rect() for alien in aliens.sprites(): if alien.rect.bottom >= screen_rect.bottom: ship_hit(ai_settings, stats, screen, ship, aliens, bullets, sb) break def check_high_score(stats, sb): if stats.score > stats.high_score: stats.high_score = stats.score sb.prep_high_score()