Pygame 是一组用来开发游戏软件的 Python 程序模块，基于 SDL 库的基础上开发。允许你在 Python 程序中创建功能丰富的游戏和多媒体程序，Pygame 是一个高可移植性的模块可以支持多个操作系统。用它来开发小游戏非常适合。
今天是用pygame写俄罗斯方块这个小游戏。
# S形方块
S_BLOCK = [Block(['.OO', 'OO.', '...'], Point(0, 0), Point(2, 1), 'S', 1),
Block(['O..',
'OO.',
'.O.'], Point(0, 0), Point(1, 2), 'S', 0)]
# Z形方块
Z_BLOCK = [Block(['OO.', '.OO', '...'], Point(0, 0), Point(2, 1), 'Z', 1),
Block(['.O.',
'OO.',
'O..'], Point(0, 0), Point(1, 2), 'Z', 0)]
# I型方块
I_BLOCK = [Block(['.O..', '.O..', '.O..', '.O..'], Point(1, 0), Point(1, 3), 'I', 1),
Block(['....',
'....',
'OOOO',
'....'], Point(0, 2), Point(3, 2), 'I', 0)]
# O型方块
O_BLOCK = [Block(['OO', 'OO'], Point(0, 0), Point(1, 1), 'O', 0)]
# L型方块
L_BLOCK = [Block(['..O', 'OOO', '...'], Point(0, 0), Point(2, 1), 'L', 1),
Block(['.O.',
'.O.',
'.OO'], Point(1, 0), Point(2, 2), 'L', 2),
Block(['...',
'OOO',
'O..'], Point(0, 1), Point(2, 2), 'L', 3),
Block(['OO.',
'.O.',
'.O.'], Point(0, 0), Point(1, 2), 'L', 0)]
# T型方块
T_BLOCK = [Block(['.O.', 'OOO', '...'], Point(0, 0), Point(2, 1), 'T', 1),
Block(['.O.',
'.OO',
'.O.'], Point(1, 0), Point(2, 2), 'T', 2),
Block(['...',
'OOO',
'.O.'], Point(0, 1), Point(2, 2), 'T', 3),
Block(['.O.',
'OO.',
'.O.'], Point(0, 0), Point(1, 2), 'T', 0)]
BLOCKS = {'O': O_BLOCK,
'I': I_BLOCK,
'Z': Z_BLOCK,
'T': T_BLOCK,
'L': L_BLOCK,
'S': S_BLOCK,}
首先，我们需要先定义俄罗斯方块的形状，这个是第一步。我们需要知道它在空间中是长什么样的。
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
if not game_over and not pause:
if time.time() - last_press_time > 0.1:
last_press_time = time.time()
if cur_pos_x > - cur_block.start_pos.X:
if _judge(cur_pos_x - 1, cur_pos_y, cur_block):
cur_pos_x -= 1
if event.key == pygame.K_RIGHT:
if not game_over and not pause:
if time.time() - last_press_time > 0.1:
last_press_time = time.time()
# 不能移除右边框
if cur_pos_x + cur_block.end_pos.X + 1 < BLOCK_WIDTH:
if _judge(cur_pos_x + 1, cur_pos_y, cur_block):
cur_pos_x += 1
if event.key == pygame.K_DOWN:
if not game_over and not pause:
if time.time() - last_press_time > 0.1:
last_press_time = time.time()
if not _judge(cur_pos_x, cur_pos_y + 1, cur_block):
_dock()
else:
last_drop_time = time.time()
cur_pos_y += 1
这一段代码写了用键盘按键操作俄罗斯方块，然后按左右键，可以整体左右移动，按下键，就会加速向下移动。
def _dock():
nonlocal cur_block, next_block, game_area, cur_pos_x, cur_pos_y, game_over, score, speed
for _i in range(cur_block.start_pos.Y, cur_block.end_pos.Y + 1):
for _j in range(cur_block.start_pos.X, cur_block.end_pos.X + 1):
if cur_block.template[_i][_j] != '.':
game_area[cur_pos_y + _i][cur_pos_x + _j] = '0'
if cur_pos_y + cur_block.start_pos.Y <= 0:
game_over = True
else:
# 计算消除
remove_idxs = []
for _i in range(cur_block.start_pos.Y, cur_block.end_pos.Y + 1):
if all(_x == '0' for _x in game_area[cur_pos_y + _i]):
remove_idxs.append(cur_pos_y + _i)
if remove_idxs:
# 计算得分
remove_count = len(remove_idxs)
if remove_count == 1:
score += 100
elif remove_count == 2:
score += 300
elif remove_count == 3:
score += 700
elif remove_count == 4:
score += 1500
speed = orispeed - 0.03 * (score // 10000)
# 消除
_i = _j = remove_idxs[-1]
while _i >= 0:
while _j in remove_idxs:
_j -= 1
if _j < 0:
game_area[_i] = ['.'] * BLOCK_WIDTH
else:
game_area[_i] = game_area[_j]
_i -= 1
_j -= 1
cur_block = next_block
next_block = blocks.get_block()
cur_pos_x, cur_pos_y = (BLOCK_WIDTH - cur_block.end_pos.X - 1) // 2, -1 - cur_bloc
最后需要判断方块触底的时候，是否游戏结束。然后是否消除方块，进行加分。
总的来说游戏逻辑并非太难，有兴趣的同学可以关注公众号：诗一样的代码，找我一起讨论学习。
