#!/usr/bin/env python3 """ Day 089 — 游戏循环与事件：完整事件处理系统 演示所有常见事件类型：键盘、鼠标、自定义事件、定时器。 """ import pygame import sys # ─── 初始化 ─── pygame.init() WIDTH, HEIGHT = 800, 600 screen = pygame.display.set_mode((WIDTH, HEIGHT)) pygame.display.set_caption("Day 089 — 事件处理系统") clock = pygame.time.Clock() FPS = 60 # ─── 颜色 ─── BLACK = (0, 0, 0) WHITE = (255, 255, 255) RED = (220, 50, 50) GREEN = (50, 200, 50) BLUE = (50, 100, 220) YELLOW = (220, 200, 50) # ─── 游戏状态 ─── # 玩家 player_x, player_y = WIDTH // 2, HEIGHT // 2 player_speed = 5 player_color = RED # 事件日志（显示最近的事件） event_log = [] MAX_LOG = 8 # 按键状态追踪 moving_left = False moving_right = False moving_up = False moving_down = False # 自定义事件 FLASH_EVENT = pygame.USEREVENT + 1 SPAWN_EVENT = pygame.USEREVENT + 2 flash_active = False flash_timer = 0 # 子弹列表（鼠标点击发射） bullets = [] # 敌人列表（定时生成） enemies = [] # 启动定时器 pygame.time.set_timer(FLASH_EVENT, 3000) # 每 3 秒闪光一次 pygame.time.set_timer(SPAWN_EVENT, 1500) # 每 1.5 秒生成敌人 # ─── 辅助函数 ─── def add_log(text): """添加事件日志""" event_log.append(text) if len(event_log) > MAX_LOG: event_log.pop(0) def spawn_enemy(): """在随机位置生成敌人""" import random x = random.randint(50, WIDTH - 50) y = random.randint(50, HEIGHT - 50) enemies.append({"x": x, "y": y, "radius": 15}) # ─── 游戏主循环 ─── running = True while running: # ═══════════════════════════════════════ # 阶段 1：处理事件 # ═══════════════════════════════════════ for event in pygame.event.get(): # --- 系统事件 --- if event.type == pygame.QUIT: running = False # --- 键盘事件：按下 --- elif event.type == pygame.KEYDOWN: if event.key == pygame.K_ESCAPE: running = False elif event.key == pygame.K_LEFT or event.key == pygame.K_a: moving_left = True add_log("← 左移开启") elif event.key == pygame.K_RIGHT or event.key == pygame.K_d: moving_right = True add_log("→ 右移开启") elif event.key == pygame.K_UP or event.key == pygame.K_w: moving_up = True add_log("↑ 上移开启") elif event.key == pygame.K_DOWN or event.key == pygame.K_s: moving_down = True add_log("↓ 下移开启") elif event.key == pygame.K_SPACE: # 空格键：改变颜色 import random player_color = ( random.randint(50, 255), random.randint(50, 255), random.randint(50, 255), ) add_log("🎨 颜色随机改变") elif event.key == pygame.K_c: # 清空所有子弹和敌人 bullets.clear() enemies.clear() add_log("🧹 清空所有对象") # --- 键盘事件：松开 --- elif event.type == pygame.KEYUP: if event.key == pygame.K_LEFT or event.key == pygame.K_a: moving_left = False elif event.key == pygame.K_RIGHT or event.key == pygame.K_d: moving_right = False elif event.key == pygame.K_UP or event.key == pygame.K_w: moving_up = False elif event.key == pygame.K_DOWN or event.key == pygame.K_s: moving_down = False # --- 鼠标事件：移动 --- elif event.type == pygame.MOUSEMOTION: # 仅在没有按键移动时跟随鼠标 if not (moving_left or moving_right or moving_up or moving_down): player_x, player_y = event.pos # --- 鼠标事件：左键点击发射子弹 --- elif event.type == pygame.MOUSEBUTTONDOWN: if event.button == 1: # 左键 mx, my = event.pos # 计算方向向量 dx = mx - player_x dy = my - player_y length = max((dx ** 2 + dy ** 2) ** 0.5, 1) bullets.append({ "x": player_x, "y": player_y, "dx": dx / length * 8, "dy": dy / length * 8, }) add_log(f"🔫 发射子弹 → ({mx}, {my})") elif event.button == 3: # 右键 add_log(f"🖱️ 右键点击 ({event.pos[0]}, {event.pos[1]})") elif event.button == 2: # 中键 add_log("🖱️ 中键点击") # --- 自定义事件：闪光效果 --- elif event.type == FLASH_EVENT: flash_active = True flash_timer = 15 # 持续 15 帧 add_log("⚡ 闪光事件触发！") # --- 自定义事件：生成敌人 --- elif event.type == SPAWN_EVENT: spawn_enemy() add_log(f"👾 生成敌人 (总数: {len(enemies)})") # ═══════════════════════════════════════ # 阶段 2：更新状态 # ═══════════════════════════════════════ # 键盘移动（持续按住） if moving_left: player_x -= player_speed if moving_right: player_x += player_speed if moving_up: player_y -= player_speed if moving_down: player_y += player_speed # 边界限制 player_x = max(20, min(WIDTH - 20, player_x)) player_y = max(20, min(HEIGHT - 20, player_y)) # 更新子弹位置 for bullet in bullets[:]: bullet["x"] += bullet["dx"] bullet["y"] += bullet["dy"] # 移除出界子弹 if bullet["x"] < -10 or bullet["x"] > WIDTH + 10 or \ bullet["y"] < -10 or bullet["y"] > HEIGHT + 10: bullets.remove(bullet) # 闪光倒计时 if flash_active: flash_timer -= 1 if flash_timer <= 0: flash_active = False # ═══════════════════════════════════════ # 阶段 3：渲染 # ═══════════════════════════════════════ # 闪光效果：交替背景色 if flash_active and flash_timer % 4 < 2: screen.fill((30, 30, 50)) else: screen.fill(BLACK) # 绘制玩家 pygame.draw.circle(screen, player_color, (int(player_x), int(player_y)), 20) # 绘制子弹 for bullet in bullets: pygame.draw.circle(screen, YELLOW, (int(bullet["x"]), int(bullet["y"])), 4) # 绘制敌人 for enemy in enemies: pygame.draw.circle(screen, GREEN, (int(enemy["x"]), int(enemy["y"])), enemy["radius"]) # 绘制事件日志（右上角） font = pygame.font.SysFont(None, 24) log_title = font.render("=== 事件日志 ===", True, BLUE) screen.blit(log_title, (WIDTH - 220, 10)) for i, log_text in enumerate(event_log): text = font.render(log_text, True, WHITE) screen.blit(text, (WIDTH - 220, 35 + i * 22)) # 绘制操作提示（底部） help_font = pygame.font.SysFont(None, 22) help_lines = [ "WASD/方向键: 移动 | 鼠标: 跟随 | 左键: 发射 | 空格: 变色 | C: 清空 | ESC: 退出" ] for i, line in enumerate(help_lines): text = help_font.render(line, True, (150, 150, 150)) screen.blit(text, (10, HEIGHT - 30 + i * 20)) # FPS 显示 fps_text = font.render(f"FPS: {clock.get_fps():.0f} | 子弹: {len(bullets)} | 敌人: {len(enemies)}", True, WHITE) screen.blit(fps_text, (10, 10)) pygame.display.flip() # ═══════════════════════════════════════ # 阶段 4：帧率控制 # ═══════════════════════════════════════ clock.tick(FPS) pygame.quit() sys.exit()