From 6e3125970063615d418468a6beb8de525fea2af1 Mon Sep 17 00:00:00 2001 From: 204481211 <1406010188@qq.com> Date: Tue, 22 Jun 2021 16:39:56 +0800 Subject: [PATCH] game_functions --- game_functions.py | 208 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 game_functions.py diff --git a/game_functions.py b/game_functions.py new file mode 100644 index 0000000..e59e739 --- /dev/null +++ b/game_functions.py @@ -0,0 +1,208 @@ +import sys, pygame +from bullet import Bullet +from alien import Alien +from time import sleep + +def check_keydown_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): + """如果还没有到达极限，就重新发送一颗子弹""" + # 创建一颗子弹并将其加入到编组中 + if len(bullets) < ai_settings.bullets_allowed: + new_bullet = Bullet(ai_settings, screen, ship) + bullets.add(new_bullet) + +def check_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 check_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: + 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) + +def check_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 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() + +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 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, bullets, aliens): + """更新子弹的位置，并删除已经消失的子弹""" + # 更新子弹的位置 + bullets.update() + + # 删除已经消失的子弹 + for bullet in bullets.copy(): + if bullet.rect.bottom <= 0: + bullets.remove(bullet) + check_bullet_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets) + +def check_bullet_alien_collisions(ai_settings, screen, stats, sb, ship, aliens, bullets): + """相应子弹和外星人发生碰撞""" + # 删除发生碰撞的子弹和外星人 + collisions = pygame.sprite.groupcollide(bullets, aliens, True, True) + + if collisions: + for aliens in collisions.values(): + stats.score += ai_settings.alien_points * len(aliens) + sb.prep_score() + check_high_score(stats, sb) + + if len(aliens) == 0: + # 如果整群外星人被消灭，就提高一个等级 + bullets.empty() + ai_settings.increase_speed() + create_fleet(ai_settings, screen, ship, aliens) + + # 提高等级 + stats.level += 1 + sb.prep_level() +def get_number_aliens_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_aliens_x = int(available_space_x / (2 * alien_width)) + return number_aliens_x + +def get_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)) + return number_rows + +def create_alien(ai_settings, screen, aliens, alien_number, row_number): + """创建一个外星人，并将其放在当前行""" + 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，并计算一行可容纳所少外星人 + # 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) + # 创建外星人群 + for row_number in range(number_rows): + for alien_number in range(number_aliens_x): + create_alien(ai_settings, screen, aliens, alien_number, row_number) + +def check_fleet_edges(ai_settings, aliens): + """有外星人到达边缘时，采取相应措施""" + for alien in aliens.sprites(): + if alien.check_edges(): + check_fleet_direction(ai_settings, aliens) + break + +def check_fleet_direction(ai_settings, aliens): + """将整群外星人下移并改变他们的方向""" + for alien in aliens.sprites(): + alien.rect.y += ai_settings.fleet_drop_speed + ai_settings.fleet_direction *= -1 + +def ship_hit(ai_settings, stats, sb, screen, ship, aliens, bullets): + """响应被外星人撞到的飞船""" + if stats.ships_left > 0: + # 将ships_lest -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，并将飞船放到屏幕底端 + create_fleet(ai_settings, screen, ship, aliens) + ship.center_ship() + # 暂停0 + sleep(1) + else: + stats.game_active = False + pygame.mouse.set_visible(True) + +def check_aliens_bottom(ai_settings, stats, sb, screen, 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, stats, sb, screen, ship, aliens, bullets) + break + +def update_aliens(ai_settings, stats, sb, screen, ship, aliens, bullets): + """检查是否有外星人处于屏幕边缘，并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 + if pygame.sprite.spritecollideany(ship, aliens): + ship_hit(ai_settings, stats, sb, screen, ship, aliens, bullets) + # 检查是否有外星人到达了屏幕底端 + check_aliens_bottom(ai_settings, stats, sb, screen, ship, aliens, bullets) + +def check_high_score(stats, sb): + """检查是否诞生了新的最高得分""" + if stats.score > stats.high_score: + stats.high_score = stats.score + sb.prep_high_score()