贪吃蛇代码

import pygame import random import sys

初始化pygame

pygame.init()

游戏常量

WIDTH, HEIGHT = 600, 600 GRID_SIZE = 20 GRID_WIDTH = WIDTH // GRID_SIZE GRID_HEIGHT = HEIGHT // GRID_SIZE FPS = 10

颜色定义

BLACK = (0, 0, 0) WHITE = (255, 255, 255) GREEN = (0, 255, 0) RED = (255, 0, 0) BLUE = (0, 120, 255)

方向

UP = (0, -1) DOWN = (0, 1) LEFT = (-1, 0) RIGHT = (1, 0)

class Snake: def init(self): self.reset()

def reset(self):
    self.length = 3
    self.positions = [(GRID_WIDTH // 2, GRID_HEIGHT // 2)]
    self.direction = RIGHT
    self.score = 0
    # 初始化蛇身
    for i in range(1, self.length):
        self.positions.append((self.positions[0][0] - i, self.positions[0][1]))

def get_head_position(self):
    return self.positions[0]

def turn(self, point):
    if self.length > 1 and (point[0] * -1, point[1] * -1) == self.direction:
        return  # 不能直接反向移动
    else:
        self.direction = point

def move(self):
    head = self.get_head_position()
    x, y = self.direction
    new_x = (head[0] + x) % GRID_WIDTH
    new_y = (head[1] + y) % GRID_HEIGHT
    new_position = (new_x, new_y)
    
    # 检查是否撞到自己
    if new_position in self.positions[1:]:
        self.reset()
    else:
        self.positions.insert(0, new_position)
        if len(self.positions) > self.length:
            self.positions.pop()

def draw(self, surface):
    for i, p in enumerate(self.positions):
        # 蛇头用不同颜色
        color = BLUE if i == 0 else GREEN
        rect = pygame.Rect((p[0] * GRID_SIZE, p[1] * GRID_SIZE), (GRID_SIZE, GRID_SIZE))
        pygame.draw.rect(surface, color, rect)
        pygame.draw.rect(surface, BLACK, rect, 1)

def grow(self):
    self.length += 1
    self.score += 10

class Food: def init(self): self.position = (0, 0) self.randomize_position()

def randomize_position(self):
    self.position = (random.randint(0, GRID_WIDTH - 1), random.randint(0, GRID_HEIGHT - 1))

def draw(self, surface):
    rect = pygame.Rect((self.position[0] * GRID_SIZE, self.position[1] * GRID_SIZE), (GRID_SIZE, GRID_SIZE))
    pygame.draw.rect(surface, RED, rect)
    pygame.draw.rect(surface, BLACK, rect, 1)

def draw_grid(surface): for y in range(0, HEIGHT, GRID_SIZE): for x in range(0, WIDTH, GRID_SIZE): rect = pygame.Rect((x, y), (GRID_SIZE, GRID_SIZE)) pygame.draw.rect(surface, WHITE, rect, 1)

def main(): # 初始化游戏窗口 screen = pygame.display.set_mode((WIDTH, HEIGHT)) pygame.display.set_caption('贪吃蛇游戏') clock = pygame.time.Clock()

# 创建蛇和食物
snake = Snake()
food = Food()

# 游戏主循环
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                snake.turn(UP)
            elif event.key == pygame.K_DOWN:
                snake.turn(DOWN)
            elif event.key == pygame.K_LEFT:
                snake.turn(LEFT)
            elif event.key == pygame.K_RIGHT:
                snake.turn(RIGHT)
    
    # 移动蛇
    snake.move()
    
    # 检查是否吃到食物
    if snake.get_head_position() == food.position:
        snake.grow()
        food.randomize_position()
        # 确保食物不出现在蛇身上
        while food.position in snake.positions:
            food.randomize_position()
    
    # 绘制游戏界面
    screen.fill(BLACK)
    draw_grid(screen)
    snake.draw(screen)
    food.draw(screen)
    
    # 显示分数
    font = pygame.font.SysFont('arial', 20)
    score_text = font.render(f'分数: {snake.score}', True, WHITE)
    screen.blit(score_text, (5, 5))
    
    # 显示游戏说明
    instruction = font.render('使用方向键控制蛇的移动', True, WHITE)
    screen.blit(instruction, (WIDTH - instruction.get_width() - 5, 5))
    
    pygame.display.update()
    clock.tick(FPS)

if name == "main": main()