import pygame import sys import random # --- 初始化 Pygame --- pygame.init() # --- 常量定义 --- SCREEN_WIDTH = 600 SCREEN_HEIGHT = 600 GRID_SIZE = 20 # 网格大小 GRID_WIDTH = SCREEN_WIDTH // GRID_SIZE GRID_HEIGHT = SCREEN_HEIGHT // GRID_SIZE FPS = 10 # 游戏速度（帧率） # 颜色定义 (R, G, B) COLOR_BG = (20, 20, 30) # 深蓝黑背景 COLOR_SNAKE = (0, 255, 150) # 蛇身颜色 (亮绿) COLOR_SNAKE_HEAD = (0, 200, 100) # 蛇头颜色 (深绿) COLOR_FOOD = (255, 50, 50) # 食物颜色 (红) COLOR_TEXT = (255, 255, 255) # 文字颜色 COLOR_GRID = (30, 30, 40) # 网格线颜色 # 方向定义 UP = (0, -1) DOWN = (0, 1) LEFT = (-1, 0) RIGHT = (1, 0) class Snake: def __init__(self): self.reset() def reset(self): # 初始位置在屏幕中心 start_x = GRID_WIDTH // 2 start_y = GRID_HEIGHT // 2 self.body = [(start_x, start_y), (start_x - 1, start_y), (start_x - 2, start_y)] self.direction = RIGHT self.grow = False def move(self): head_x, head_y = self.body[0] dir_x, dir_y = self.direction new_head = (head_x + dir_x, head_y + dir_y) # 插入新头部 self.body.insert(0, new_head) # 如果不吃食物，移除尾部 if not self.grow: self.body.pop() else: self.grow = False def change_direction(self, new_dir): # 防止反向移动 (例如：向右走时不能直接向左) if (new_dir[0] * -1, new_dir[1] * -1) != self.direction: self.direction = new_dir def check_collision(self): head = self.body[0] # 撞墙检测 if (head[0] < 0 or head[0] >= GRID_WIDTH or head[1] < 0 or head[1] >= GRID_HEIGHT): return True # 撞自己检测 if head in self.body[1:]: return True return False def draw(self, surface): for i, (x, y) in enumerate(self.body): rect = pygame.Rect(x * GRID_SIZE, y * GRID_SIZE, GRID_SIZE, GRID_SIZE) # 蛇头颜色稍深，蛇身颜色稍浅 color = COLOR_SNAKE_HEAD if i == 0 else COLOR_SNAKE pygame.draw.rect(surface, color, rect) # 给蛇身加个边框，看起来更有质感 pygame.draw.rect(surface, COLOR_BG, rect, 1) class Food: def __init__(self): self.position = (0, 0) self.randomize() def randomize(self, snake_body=None): while True: x = random.randint(0, GRID_WIDTH - 1) y = random.randint(0, GRID_HEIGHT - 1) self.position = (x, y) # 确保食物不会生成在蛇身上 if snake_body is None or self.position not in snake_body: break def draw(self, surface): x, y = self.position rect = pygame.Rect(x * GRID_SIZE, y * GRID_SIZE, GRID_SIZE, GRID_SIZE) # 画个圆形的食物 pygame.draw.ellipse(surface, COLOR_FOOD, rect) # 加点高光 highlight = pygame.Rect(x * GRID_SIZE + 4, y * GRID_SIZE + 4, 4, 4) pygame.draw.ellipse(surface, (255, 200, 200), highlight) def draw_grid(surface): for x in range(0, SCREEN_WIDTH, GRID_SIZE): pygame.draw.line(surface, COLOR_GRID, (x, 0), (x, SCREEN_HEIGHT)) for y in range(0, SCREEN_HEIGHT, GRID_SIZE): pygame.draw.line(surface, COLOR_GRID, (0, y), (SCREEN_WIDTH, y)) def draw_text(surface, text, size, x, y, color=COLOR_TEXT, center=True): font = pygame.font.SysFont('Arial', size, bold=True) text_surface = font.render(text, True, color) text_rect = text_surface.get_rect() if center: text_rect.center = (x, y) else: text_rect.topleft = (x, y) surface.blit(text_surface, text_rect) def main(): screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) pygame.display.set_caption("Python 贪吃蛇大作战") clock = pygame.time.Clock() snake = Snake() food = Food() food.randomize(snake.body) score = 0 high_score = 0 state = "START" # START, PLAYING, PAUSED, GAMEOVER running = True while running: # 1. 事件处理 for event in pygame.event.get(): if event.type == pygame.QUIT: running = False if event.type == pygame.KEYDOWN: if state == "START": if event.key == pygame.K_SPACE: state = "PLAYING" snake.reset() score = 0 food.randomize(snake.body) elif state == "PLAYING": if event.key == pygame.K_UP or event.key == pygame.K_w: snake.change_direction(UP) elif event.key == pygame.K_DOWN or event.key == pygame.K_s: snake.change_direction(DOWN) elif event.key == pygame.K_LEFT or event.key == pygame.K_a: snake.change_direction(LEFT) elif event.key == pygame.K_RIGHT or event.key == pygame.K_d: snake.change_direction(RIGHT) elif event.key == pygame.K_ESCAPE: state = "PAUSED" elif state == "PAUSED": if event.key == pygame.K_ESCAPE: state = "PLAYING" elif state == "GAMEOVER": if event.key == pygame.K_SPACE: state = "START" # 2. 逻辑更新 if state == "PLAYING": snake.move() # 吃食物检测 if snake.body[0] == food.position: snake.grow = True score += 1 if score > high_score: high_score = score food.randomize(snake.body) # 碰撞检测 if snake.check_collision(): state = "GAMEOVER" # 3. 绘制渲染 screen.fill(COLOR_BG) draw_grid(screen) # 绘制背景网格 # 绘制游戏元素 if state != "START": food.draw(screen) snake.draw(screen) # 绘制 UI draw_text(screen, f"Score: {score}", 20, 10, 10, center=False) draw_text(screen, f"High Score: {high_score}", 20, SCREEN_WIDTH - 10, 10, center=False) # 状态界面 if state == "START": draw_text(screen, "贪吃蛇大作战", 60, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 - 50) draw_text(screen, "按 [空格] 开始游戏", 30, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 + 20) draw_text(screen, "方向键/WASD 移动 | ESC 暂停", 20, SCREEN_WIDTH//2, SCREEN_HEIGHT - 40, (150, 150, 150)) elif state == "PAUSED": # 半透明遮罩 s = pygame.Surface((SCREEN_WIDTH, SCREEN_HEIGHT)) s.set_alpha(150) s.fill((0, 0, 0)) screen.blit(s, (0, 0)) draw_text(screen, "游戏暂停", 50, SCREEN_WIDTH//2, SCREEN_HEIGHT//2) draw_text(screen, "按 [ESC] 继续", 25, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 + 50) elif state == "GAMEOVER": # 半透明遮罩 s = pygame.Surface((SCREEN_WIDTH, SCREEN_HEIGHT)) s.set_alpha(180) s.fill((0, 0, 0)) screen.blit(s, (0, 0)) draw_text(screen, "GAME OVER", 60, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 - 40, (255, 50, 50)) draw_text(screen, f"最终得分: {score}", 40, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 + 20) draw_text(screen, "按 [空格] 返回主菜单", 25, SCREEN_WIDTH//2, SCREEN_HEIGHT//2 + 70) pygame.display.flip() clock.tick(FPS) pygame.quit() sys.exit() if __name__ == "__main__": main()