写一个推箱子的Python代码

推箱子是一种经典的益智游戏，玩家需要操作角色推动箱子到目标位置。以下是一个简单的推箱子Python代码实现：

# 导入必要的库
import pygame
import sys

# 定义常量
WIDTH = 800
HEIGHT = 600
FPS = 60
BLOCK_SIZE = 50
ROWS = HEIGHT // BLOCK_SIZE
COLS = WIDTH // BLOCK_SIZE

# 定义颜色
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
BLUE = (0, 0, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)

# 定义游戏状态
GAME_OVER = 0
PLAYING = 1
WIN = 2

# 定义游戏地图
MAP = [
    "##########",
    "#        #",
    "#        #",
    "#  P     #",
    "#        #",
    "#   B    #",
    "#        #",
    "#        #",
    "#        #",
    "##########"
]

# 初始化pygame
pygame.init()

# 设置窗口大小和标题
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Push Box")

# 加载游戏资源
player_img = pygame.image.load("player.png").convert_alpha()
box_img = pygame.image.load("box.png").convert_alpha()
wall_img = pygame.image.load("wall.png").convert_alpha()
target_img = pygame.image.load("target.png").convert_alpha()

# 定义游戏对象类
class GameObject:
    def __init__(self, row, col, img):
        self.row = row
        self.col = col
        self.img = img
    
    def draw(self):
        x = self.col * BLOCK_SIZE
        y = self.row * BLOCK_SIZE
        screen.blit(self.img, (x, y))

# 定义角色类
class Player(GameObject):
    def __init__(self, row, col):
        super().__init__(row, col, player_img)
    
    def move(self, dx, dy):
        new_row = self.row + dy
        new_col = self.col + dx
        if 0 <= new_row < ROWS and 0 <= new_col < COLS:
            if game_map[new_row][new_col] != "#":
                self.row = new_row
                self.col = new_col
                return True
        return False

# 定义箱子类
class Box(GameObject):
    def __init__(self, row, col):
        super().__init__(row, col, box_img)

    def move(self, dx, dy):
        new_row = self.row + dy
        new_col = self.col + dx
        if 0 <= new_row < ROWS and 0 <= new_col < COLS:
            if game_map[new_row][new_col] != "#" and not is_box(new_row, new_col):
                self.row = new_row
                self.col = new_col
                return True
        return False

# 定义游戏地图
game_map = []
player = None
boxes = []
targets = []
for row in range(ROWS):
    game_map.append([])
    for col in range(COLS):
        char = MAP[row][col]
        if char == "#":
            game_map[row].append("#")
            wall = GameObject(row, col, wall_img)
        elif char == "P":
            game_map[row].append(".")
            player = Player(row, col)
        elif char == "B":
            game_map[row].append(".")
            box = Box(row, col)
            boxes.append(box)
        elif char == " ":
            game_map[row].append(".")
        elif char == "T":
            game_map[row].append(".")
            target = GameObject(row, col, target_img)
            targets.append(target)

# 判断一个位置是否有箱子
def is_box(row, col):
    for box in boxes:
        if box.row == row and box.col == col:
            return True
    return False

# 判断游戏是否胜利
def is_win():
    for target in targets:
        is_covered = False
        for box in boxes:
            if box.row == target.row and box.col == target.col:
                is_covered = True
                break
        if not is_covered:
            return False
    return True

# 游戏循环
state = PLAYING
clock = pygame.time.Clock()
while True:
    # 处理事件
    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:
                if player.move(0, -1):
                    for box in boxes:
                        if player.row == box.row and player.col == box.col:
                            box.move(0, -1)
                            break
            elif event.key == pygame.K_DOWN:
                if player.move(0, 1):
                    for box in boxes:
                        if player.row == box.row and player.col == box.col:
                            box.move(0, 1)
                            break
            elif event.key == pygame.K_LEFT:
                if player.move(-1, 0):
                    for box in boxes:
                        if player.row == box.row and player.col == box.col:
                            box.move(-1, 0)
                            break
            elif event.key == pygame.K_RIGHT:
                if player.move(1, 0):
                    for box in boxes:
                        if player.row == box.row and player.col == box.col:
                            box.move(1, 0)
                            break
    
    # 更新游戏状态
    if is_win():
        state = WIN
    elif state != GAME_OVER and not any([box.row == player.row and box.col == player.col for box in boxes]):
        state = GAME_OVER

    # 绘制游戏界面
    screen.fill(WHITE)
    for row in range(ROWS):
        for col in range(COLS):
            if game_map[row][col] == "#":
                wall = GameObject(row, col, wall_img)
                wall.draw()
            elif game_map[row][col] == ".":
                target = GameObject(row, col, target_img)
                target.draw()
    for box in boxes:
        box.draw()
    player.draw()
    
    # 绘制游戏状态
    if state == GAME_OVER:
        font = pygame.font.SysFont(None, 64)
        text = font.render("Game Over", True, RED)
        screen.blit(text, (WIDTH//2 - text.get_width()//2, HEIGHT//2 - text.get_height()//2))
    elif state == WIN:
        font = pygame.font.SysFont(None, 64)
        text = font.render("You Win!", True, GREEN)
        screen.blit(text, (WIDTH//2 - text.get_width()//2, HEIGHT//2 - text.get_height()//2))
    
    # 更新屏幕
    pygame.display.update()
    clock.tick(FPS)

这个代码实现了一个简单的推箱子游戏，玩家可以使用方向键控制角色移动，并推动箱子到目标位置。游戏界面使用了pygame库来实现，游戏地图使用了一个字符串列表来表示。这个代码仅仅是一个基础实现，可以添加更多的关卡、难度等元素来丰富游戏内容。