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2048.py
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#!/usr/bin/env python3
import curses, random, argparse
from curses import ascii
QUIT_KEYS = {ascii.ESC, ord('q'), ascii.ctrl(ord('C'))}
GRID_FMT = '''\
┌───────┬───────┬───────┬───────┐
│ │ │ │ │
│ {:^5} │ {:^5} │ {:^5} │ {:^5} │
│ │ │ │ │
├───────┼───────┼───────┼───────┤
│ │ │ │ │
│ {:^5} │ {:^5} │ {:^5} │ {:^5} │
│ │ │ │ │
├───────┼───────┼───────┼───────┤
│ │ │ │ │
│ {:^5} │ {:^5} │ {:^5} │ {:^5} │
│ │ │ │ │
├───────┼───────┼───────┼───────┤
│ │ │ │ │
│ {:^5} │ {:^5} │ {:^5} │ {:^5} │
│ │ │ │ │
└───────┴───────┴───────┴───────┘
'''
GRID_W = len(GRID_FMT.splitlines()[0])
GRID_H = len(GRID_FMT.splitlines())
def copy_grid(grid):
return [r[:] for r in grid]
def make_positive(grid):
for y in range(4):
for x in range(4):
grid[y][x] = abs(grid[y][x])
def move_up(grid):
moved = False
for i in range(3, 0, -1):
for y in range(i):
for x in range(4):
if grid[y][x] == 0 and grid[y+1][x]:
grid[y][x] = grid[y+1][x]
grid[y+1][x] = 0
moved = True
elif grid[y][x] > 0 and grid[y][x] == grid[y+1][x]:
grid[y][x] *= -2
grid[y+1][x] = 0
moved = True
make_positive(grid)
return moved
def move_down(grid):
moved = False
for i in range(3):
for y in range(3, i, -1):
for x in range(4):
if grid[y][x] == 0 and grid[y-1][x]:
grid[y][x] = grid[y-1][x]
grid[y-1][x] = 0
moved = True
elif grid[y][x] > 0 and grid[y][x] == grid[y-1][x]:
grid[y][x] *= -2
grid[y-1][x] = 0
moved = True
make_positive(grid)
return moved
def move_left(grid):
moved = False
for i in range(3, 0, -1):
for x in range(i):
for y in range(4):
if grid[y][x] == 0 and grid[y][x+1]:
grid[y][x] = grid[y][x+1]
grid[y][x+1] = 0
moved = True
elif grid[y][x] > 0 and grid[y][x] == grid[y][x+1]:
grid[y][x] *= -2
grid[y][x+1] = 0
moved = True
make_positive(grid)
return moved
def move_right(grid):
moved = False
for i in range(3):
for x in range(3, i, -1):
for y in range(4):
if grid[y][x] == 0 and grid[y][x-1]:
grid[y][x] = grid[y][x-1]
grid[y][x-1] = 0
moved = True
elif grid[y][x] > 0 and grid[y][x] == grid[y][x-1]:
grid[y][x] *= -2
grid[y][x-1] = 0
moved = True
make_positive(grid)
return moved
def spawn(grid):
x, y = random.randrange(4), random.randrange(4)
while grid[y][x]:
x, y = random.randrange(4), random.randrange(4)
grid[y][x] = 2 if random.random() < .9 else 4
# def draw(scr, grid):
# for y in range(0, 17, 4):
# for x in range(1, 32):
# if x % 8 != 0:
# scr.addch(y, x, curses.ACS_HLINE)
# if 4 <= y <= 12:
# scr.addch(y, 0, curses.ACS_LTEE)
# scr.addch(y, 32, curses.ACS_RTEE)
# for x in range(8, 25, 8):
# scr.addch(y, x, curses.ACS_PLUS)
# for x in range(0, 33, 8):
# for y in range(1, 16):
# if y % 4 != 0:
# scr.addch(y, x, curses.ACS_VLINE)
# if 8 <= x <= 24:
# scr.addch(0, x, curses.ACS_TTEE)
# scr.addch(16, x, curses.ACS_BTEE)
# scr.addch(0, 0, curses.ACS_ULCORNER)
# scr.addch(0, 32, curses.ACS_URCORNER)
# scr.addch(16, 0, curses.ACS_LLCORNER)
# scr.addch(16, 32, curses.ACS_LRCORNER)
# for i in range(4):
# for j in range(4):
# val = grid[i][j]
# if val:
# scr.addstr(i*4 + 2, j*8 + 2, format(val, '^5'))
# scr.refresh()
def draw(scr: 'curses.window', grid):
txt = GRID_FMT.format(*[i or '' for r in grid for i in r])
for i, line in enumerate(txt.splitlines()):
scr.addstr(i, 0, line)
scr.refresh()
def push_state(grid):
grid_hist.append((grid, random.getstate()))
def pop_state():
if not grid_hist:
return None
grid, state = grid_hist.pop()
random.setstate(state)
return grid
def main(scr: 'curses.window', init_board=None):
global grid_hist
curses.curs_set(0)
scrh, scrw = scr.getmaxyx()
win = scr.subwin((scrh-GRID_H) // 2, (scrw-GRID_W) // 2)
grid_hist = []
if init_board:
grid = init_board
else:
grid = [[0]*4 for i in range(4)]
for i in range(2):
spawn(grid)
while True:
win.clear()
draw(win, grid)
gridcp = copy_grid(grid)
if not (move_up(gridcp) or move_down(gridcp) or
move_left(gridcp) or move_right(gridcp)):
win.addstr(18, 0, 'Game over!')
win.refresh()
while scr.getch() not in {*QUIT_KEYS, ord('\n')}:
pass
break
oldgrid = copy_grid(grid)
moved = False
k = scr.getch()
if k == curses.KEY_UP:
moved = move_up(grid)
elif k == curses.KEY_DOWN:
moved = move_down(grid)
elif k == curses.KEY_LEFT:
moved = move_left(grid)
elif k == curses.KEY_RIGHT:
moved = move_right(grid)
elif k in (ascii.BS, curses.KEY_BACKSPACE):
grid = pop_state() or grid
elif k in QUIT_KEYS:
break
if moved:
push_state(oldgrid)
spawn(grid)
def parse_board(s):
return [list(map(int, row.split())) for row in s.split('|')]
if __name__ == '__main__':
p = argparse.ArgumentParser()
p.add_argument('-b', '--init-board', type=parse_board)
args = p.parse_args()
curses.wrapper(main, args.init_board)