用 Python 實作掃雷小游戲

文 | 野客

來源：Python 技術「ID: pythonall」

掃雷是一款益智類小游戲，最早于 1992 年由微軟在 Windows 上發行，游戲適合于全年齡段，規則簡單，即在最短的時間內找出所有非雷格子且在中間程序中不能踩到雷， 踩到雷則失敗，需重新開始，

本文我們使用 Python 來實作掃雷游戲，主要用的 Python 庫是 pygame，

實作

游戲組成比較簡單，主要包括：小方格、計時器、地雷等，

首先，我們初始化一些常量，比如：橫豎方塊數、地雷數、滑鼠點擊情況等，如下所示：

BLOCK_WIDTH = 30
BLOCK_HEIGHT = 16
# 塊大小
SIZE = 20
# 地雷數
MINE_COUNT = 66
# 未點擊
normal = 1
# 已點擊
opened = 2
# 地雷
mine = 3
# 標記為地雷
flag = 4
# 標記為問號
ask = 5
# 踩中地雷
bomb = 6
# 被雙擊的周圍
hint = 7
# 正被滑鼠左右鍵雙擊
double = 8
readied = 1,
started = 2,
over = 3,
win = 4

接著定義一個地雷類，類中定義一些基本屬性（如：坐標、狀態等）及 get、set 方法，代碼實作如下：

class Mine:
    def __init__(self, x, y, value=0):
        self._x = x
        self._y = y
        self._value = 0
        self._around_mine_count = -1
        self._status = normal
        self.set_value(value)
    def __repr__(self):
        return str(self._value)
    def get_x(self):
        return self._x
    def set_x(self, x):
        self._x = x
    x = property(fget=get_x, fset=set_x)
    def get_y(self):
        return self._y
    def set_y(self, y):
        self._y = y
    y = property(fget=get_y, fset=set_y)
    def get_value(self):
        return self._value
    def set_value(self, value):
        if value:
            self._value = 1
        else:
            self._value = 0
    value = property(fget=get_value, fset=set_value, doc='0:非地雷 1:雷')
    def get_around_mine_count(self):
        return self._around_mine_count
    def set_around_mine_count(self, around_mine_count):
        self._around_mine_count = around_mine_count
    around_mine_count = property(fget=get_around_mine_count, fset=set_around_mine_count, doc='四周地雷數量')
    def get_status(self):
        return self._status
    def set_status(self, value):
        self._status = value
    status = property(fget=get_status, fset=set_status, doc='BlockStatus')

再接著定義一個 MineBlock 類，用來處理掃雷的基本邏輯，代碼實作如下：

class MineBlock:
    def __init__(self):
        self._block = [[Mine(i, j) for i in range(BLOCK_WIDTH)] for j in range(BLOCK_HEIGHT)]
        # 埋雷
        for i in random.sample(range(BLOCK_WIDTH * BLOCK_HEIGHT), MINE_COUNT):
            self._block[i // BLOCK_WIDTH][i % BLOCK_WIDTH].value = 1
    def get_block(self):
        return self._block
    block = property(fget=get_block)
    def getmine(self, x, y):
        return self._block[y][x]
    def open_mine(self, x, y):
        # 踩到雷了
        if self._block[y][x].value:
            self._block[y][x].status = bomb
            return False
        # 先把狀態改為 opened
        self._block[y][x].status = opened
        around = _get_around(x, y)
        _sum = 0
        for i, j in around:
            if self._block[j][i].value:
                _sum += 1
        self._block[y][x].around_mine_count = _sum
        # 如果周圍沒有雷，那么將周圍 8 個未中未點開的遞回算一遍
        if _sum == 0:
            for i, j in around:
                if self._block[j][i].around_mine_count == -1:
                    self.open_mine(i, j)
        return True
    def double_mouse_button_down(self, x, y):
        if self._block[y][x].around_mine_count == 0:
            return True
        self._block[y][x].status = double
        around = _get_around(x, y)
        # 周圍被標記的雷數量
        sumflag = 0
        for i, j in _get_around(x, y):
            if self._block[j][i].status == flag:
                sumflag += 1
        # 周邊的雷已經全部被標記
        result = True
        if sumflag == self._block[y][x].around_mine_count:
            for i, j in around:
                if self._block[j][i].status == normal:
                    if not self.open_mine(i, j):
                        result = False
        else:
            for i, j in around:
                if self._block[j][i].status == normal:
                    self._block[j][i].status = hint
        return result
    def double_mouse_button_up(self, x, y):
        self._block[y][x].status = opened
        for i, j in _get_around(x, y):
            if self._block[j][i].status == hint:
                self._block[j][i].status = normal

我們接下來初始化界面，首先生成由小方格組成的面板，主要代碼實作如下：

for row in block.block:
 for mine in row:
  pos = (mine.x * SIZE, (mine.y + 2) * SIZE)
  if mine.status == opened:
   screen.blit(img_dict[mine.around_mine_count], pos)
   opened_count += 1
  elif mine.status == double:
   screen.blit(img_dict[mine.around_mine_count], pos)
  elif mine.status == bomb:
   screen.blit(img_blood, pos)
  elif mine.status == flag:
   screen.blit(img_flag, pos)
   flag_count += 1
  elif mine.status == ask:
   screen.blit(img_ask, pos)
  elif mine.status == hint:
   screen.blit(img0, pos)
  elif game_status == over and mine.value:
   screen.blit(img_mine, pos)
  elif mine.value == 0 and mine.status == flag:
   screen.blit(img_error, pos)
  elif mine.status == normal:
   screen.blit(img_blank, pos)

看一下效果：

再接著添加面板的 head 部分，包括：顯示雷數、重新開始按鈕（笑臉）、顯示耗時，主要代碼實作如下：

print_text(screen, font1, 30, (SIZE * 2 - fheight) // 2 - 2, '%02d' % (MINE_COUNT - flag_count), red)
if game_status == started:
 elapsed_time = int(time.time() - start_time)
print_text(screen, font1, SCREEN_WIDTH - fwidth - 30, (SIZE * 2 - fheight) // 2 - 2, '%03d' % elapsed_time, red)
if flag_count + opened_count == BLOCK_WIDTH * BLOCK_HEIGHT:
 game_status = win
if game_status == over:
 screen.blit(img_face_fail, (face_pos_x, face_pos_y))
elif game_status == win:
 screen.blit(img_face_success, (face_pos_x, face_pos_y))
else:
 screen.blit(img_face_normal, (face_pos_x, face_pos_y))

看一下效果：

再接著添加各種點擊事件，代碼實作如下：

for event in pygame.event.get():
 if event.type == QUIT:
  sys.exit()
 elif event.type == MOUSEBUTTONDOWN:
  mouse_x, mouse_y = event.pos
  x = mouse_x // SIZE
  y = mouse_y // SIZE - 2
  b1, b2, b3 = pygame.mouse.get_pressed()
  if game_status == started:
   # 滑鼠左右鍵同時按下，如果已經標記了所有雷，則打開周圍一圈；如果還未標記完所有雷，則有一個周圍一圈被同時按下的效果
   if b1 and b3:
    mine = block.getmine(x, y)
    if mine.status == opened:
     if not block.double_mouse_button_down(x, y):
      game_status = over
 elif event.type == MOUSEBUTTONUP:
  if y < 0:
   if face_pos_x <= mouse_x <= face_pos_x + face_size \
     and face_pos_y <= mouse_y <= face_pos_y + face_size:
    game_status = readied
    block = MineBlock()
    start_time = time.time()
    elapsed_time = 0
    continue
  if game_status == readied:
   game_status = started
   start_time = time.time()
   elapsed_time = 0
  if game_status == started:
   mine = block.getmine(x, y)
   # 按滑鼠左鍵
   if b1 and not b3:
    if mine.status == normal:
     if not block.open_mine(x, y):
      game_status = over
   # 按滑鼠右鍵
   elif not b1 and b3:
    if mine.status == normal:
     mine.status = flag
    elif mine.status == flag:
     mine.status = ask
    elif mine.status == ask:
     mine.status = normal
   elif b1 and b3:
    if mine.status == double:
     block.double_mouse_button_up(x, y)

我們來看一下最終實作效果：

總結

本文我們通過 Python 簡單的實作了掃雷游戲，大家有興趣的話，可以實際操作一下，看看自己能否排除全部的雷，

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