FAQ
Hi,

I have wrote a game with python curses. The problem is that I want to
confirm before quitting, while my implementation doesn't seem to work.
Anyone can help me?
[code]
#!/usr/bin/python
#
# Brick & Ball in Python
# by Jerry Fleming <jerryfleming at etang.com>
#
# This is a small game adapted from that in Motorola Mobile C289, and my
first game in python :)
#
# This progrma is best run under linux. Since Windows port of Python has
poor curses support,
# play it under Windows is not recommended. If you have no linux box
available, try Cygwin,
# though it too has poor curses support.
#
# As I am a newbie to python, please tell me if you have a better
implementation or any suggestions.
#
# TODO:
# re-implemente it with wxPython, so one does not have to rely on the
ugly curses.
# session support.
# pausing, especially when confirming
# resize terminal at run time
#
# HISTORY
# 2006-04-19: first version
#
#

import curses
import _curses
import thread
from time import sleep
from string import split
from random import randint

# parameters: adjust them to fit you terminal
brick_width = 7
brick_gap_x = 1
brick_gap_y = 1
speed = 0.05 # sleep time to control moving speed of the ball
pause = 1 # time to pause

# terminal initialization
stdscr = curses.initscr()
curses.noecho()
curses.cbreak()
curses.curs_set(0)
stdscr.keypad(1)
screen_height, screen_width = stdscr.getmaxyx()
screen_height = screen_height - 1
screen_width = screen_width - 1
brick_rows = screen_height / 4
if brick_rows > 7: brick_rows = 7
brick_cols = (screen_width + brick_gap_x) / (brick_width + brick_gap_x)
brick_margin = (screen_width - brick_cols * (brick_width + brick_gap_x)
+ brick_gap_x)/2
pad_position = randint(0, screen_width - brick_width)
ball_position = [screen_height - 3, randint(0, screen_width - brick_width)]
ball_direction = [-1, 1] # abs(tan(a)) must be 1
char = ''
bricks = []
game_score = 0
ScreenSizeError = 'ScreenSizeError'

tStart = '''
______ _ _ ___ ______ _ _ _
______ _
(____ \ (_) | | / _ \ (____ \ | | | (_)
(_____ \ _ | |
____) ) ____ _ ____| | _ ( (_) ) ____) )_____| | | _ ____
_____) ) _ _| |_| |__ ___ ____
__ ( / ___) |/ ___) |_/ ) ) _ ( | __ ((____ | | | | | _ \
____/ | | (_ _) _ \ / _ \| _ \
__) ) | | ( (___| _ ( ( (/ \ | |__) ) ___ | | | | | | | |
_| | | |_| | | | |_| | | | |
______/|_| |_|\____)_| \_) \__/\_) |______/\_____|\_)_) |_|_| |_|
_| \__ | \__)_| |_|\___/|_| |_|
(____/


by Jerry Fleming <jerryfleming at etang.com>


GAME STARTING ...

(this assumes that your terminal be larger that
130x40)
'''

tExit = '''
88888
88888
88888888888 88 ad88888ba 88 8b d8 d8
88
88 "" ,d d8" "8b 88 Y8, ,8P ,8P'
88
88 88 "" a8P 88 Y8, ,8P d8"
88
88aaaaa 8b, ,d8 88 MM88MMM ,a8P" 88 "8aa8" ,8P'
8b,dPPYba, 88
88""""" `Y8, ,8P' 88 88 d8" 88 `88' d8" 88P'
`"8a 88
88 )888( 88 88 "" 88 88 ,8P' 88
88 88
88 ,d8" "8b, 88 88, aa 88 88 d8" 88
88 88
88888888888 8P' `Y8 88 "Y888 88 88 88 8P' 88
88 88
88888
88888
'''

tOver = '''
,ad8888ba,
88
d8"' `"8b
88
d8'
88
88 ,adPPYYba, 88,dPYba,,adPYba, ,adPPYba, ,adPPYba, 8b
d8 ,adPPYba, 8b,dPPYba, 88
88 88888 "" `Y8 88P' "88" "8a a8P_____88 a8" "8a
`8b d8' a8P_____88 88P' "Y8 88
Y8, 88 ,adPPPPP88 88 88 88 8PP""""""" 8b d8
`8b d8' 8PP""""""" 88 ""
Y8a. .a88 88, ,88 88 88 88 "8b, ,aa "8a, ,a8"
`8b,d8' "8b, ,aa 88 aa
`"Y88888P" `"8bbdP"Y8 88 88 88 `"Ybbd8"' `"YbbdP"'
"8" `"Ybbd8"' 88 88
'''

tGoon = '''
88888
88888
,ad8888ba, ad88888ba 88 8b
d8 d8 88
d8"' `"8b d8" "8b 88 Y8,
,8P ,8P' 88
d8' "" a8P 88 Y8,
,8P d8" 88
88 ,adPPYba, ,adPPYba, 8b,dPPYba, ,a8P" 88
"8aa8" ,8P' 8b,dPPYba, 88
88 88888 a8" "8a a8" "8a 88P' `"8a d8" 88
`88' d8" 88P' `"8a 88
Y8, 88 8b d8 8b d8 88 88 "" 88
88 ,8P' 88 88 88
Y8a. .a88 "8a, ,a8" "8a, ,a8" 88 88 aa 88
88 d8" 88 88 88
`"Y88888P" `"YbbdP"' `"YbbdP"' 88 88 88 88
88 8P' 88 88 88
88888
88888
'''

def init_game():
'''Game initializing.'''
global bricks
# display the bricks
for row in range(brick_rows):
y = row * (1 + brick_gap_y)
for col in range(brick_cols):
x = col * (brick_gap_x + brick_width) + brick_margin
stdscr.addstr(y, x, ' ' * brick_width, curses.A_REVERSE)
bricks.append([y, x])
# move the pad to center of bottom at starting up
stdscr.addstr(screen_height - 1, pad_position, ' ' * brick_width,
curses.A_REVERSE)
# move the ball to left bottom side at starting up
stdscr.addstr(ball_position[0], ball_position[1], ' ', curses.A_REVERSE)
# display score board
stdscr.addstr(screen_height, 0, ' SCORE: '+ ('%03d' % game_score) + '
'* 4, curses.A_REVERSE)
stdscr.addstr(screen_height, 15, 'USE q to quit' + ' '* (screen_width -
28), curses.A_REVERSE)
# final step to init display
stdscr.refresh()

def move_pad(lock):
'''Move the pad to catch the ball.'''
global char, pad_position
char = stdscr.getch()
if char == ord('q'): quit_game(lock)
if char == curses.KEY_LEFT: pad_position = pad_position - 1
if char == curses.KEY_RIGHT: pad_position = pad_position + 1
if pad_position < 0: pad_position = 0
if pad_position >= screen_width - brick_width: pad_position =
screen_width - brick_width
stdscr.addstr(screen_height - 1, 0, ' ' * screen_width)
stdscr.addstr(screen_height - 1, pad_position, ' ' * brick_width,
curses.A_REVERSE)
stdscr.refresh()

def move_ball(lock):
'''Move the ball to a direction.'''
global ball_position, ball_direction
# clear the old position, do not if in pad
if ball_position[0] != screen_height - 1:
stdscr.addstr(ball_position[0], ball_position[1], ' ')
ball_position[0] = ball_position[0] + ball_direction[0]
ball_position[1] = ball_position[1] + ball_direction[1]
stdscr.addstr(ball_position[0], ball_position[1], ' ', curses.A_REVERSE)
detect_collision(lock)
stdscr.refresh()
sleep(speed)

def detect_collision(lock):
'''Detect whether the ball has hit something, change direction if yes.'''
global bricks, ball_direction, game_score
# hit upper wall
if ball_position[0] == 0 :
ball_direction = [- ball_direction[0], ball_direction[1]]
# hit left and right wall
if ball_position[1] == 0 or ball_position[1] == screen_width:
ball_direction = [ball_direction[0], - ball_direction[1]]
# hit brick
for brick in bricks:
# hit from bottom or upper direction
if brick[1] <= ball_position[1] + ball_direction[1] <= brick[1] +
brick_width \
and ball_position[0] + ball_direction[0] == brick[0]:
ball_direction[0] = - ball_direction[0]
stdscr.addstr(brick[0], brick[1], ' '* brick_width)
game_score = game_score + 10
stdscr.addstr(screen_height, 8, '%03d' % game_score, curses.A_REVERSE)
bricks.remove(brick)
# another level to continue the game
if not len(bricks): another_level()
# hit body of pad
if ball_position[0] == screen_height - 2 and pad_position <=
ball_position[1] <= pad_position + brick_width:
ball_direction[0] = - ball_direction[0]
# hit bottom
elif ball_position[0] == screen_height - 1:
ball_direction[0] = - ball_direction[0]
# hit left side of pad (hit bottom already)
if ball_position[1] == pad_position and char == curses.KEY_LEFT and
ball_direction[1]:
ball_direction[1] = - ball_direction[1]
# hit right side of pad (hit bottom already)
if ball_position[1] == pad_position + brick_width and char ==
curses.KEY_RIGHT and not ball_direction[1]:
ball_direction[1] = - ball_direction[1]
# hit bottom wall, game over
if ball_position[0] == screen_height - 1 and not pad_position <=
ball_position[1] <= pad_position + brick_width:
line_num = 0
for line in split(tOver, "\n"):
stdscr.addstr(screen_height / 2 + line_num, 10, line)
line_num = line_num + 1
stdscr.refresh()
curses.flash()
sleep(1)
curses.flash()
sleep(1)
lock.release()

def quit_game(lock):
'''Confirm quit the game.'''
global char, speed
if char != ord('q'): return
speed_old = speed # store the value for resume
speed = pause # wait for a long time
line_num = 0
for line in split(tExit, "\n"):
stdscr.addstr(screen_height / 2 + line_num, 10, line)
line_num = line_num + 1
stdscr.addstr(screen_height, 15, 'USE n to continue, any other key to
quit' + ' '* (screen_width - 40), curses.A_REVERSE)
stdscr.refresh()
#char = stdscr.getch() ## fix me: why can't we use the global char?
if char == ord('n'):
speed = speed_old
line_num = 0
for line in split(tExit, "\n"):
stdscr.addstr(screen_height / 2 + line_num, 10, ' ' * len(line) )
line_num = line_num + 1
stdscr.refresh()
else:
lock.release()

def another_level():
'''Confirm another level of the game.'''
global speed, char
speed_old = speed # store the value for resume
speed = pause # wait for a long time
line_num = 0
for line in split(tGoon, "\n"):
stdscr.addstr(screen_height / 2 + line_num, 10, line)
line_num = line_num + 1
stdscr.addstr(screen_height, 15, 'USE n to quit, any other key to
continue' + ' '* (screen_width - 40), curses.A_REVERSE)
stdscr.refresh()
#char = stdscr.getch()
if char == ord('n'):
lock.release()
else:
stdscr.erase()
speed = speed / 2
init_game()

def looper(fun, lock):
'''Dispatcher to drive th ball and pad.'''
try:
while lock.locked(): globals()[fun](lock)
except _curses.error, diag:
if lock.locked(): lock.release()

# main loop starts here
if __name__ == "__main__":
try:
line_num = 0
for line in split(tStart, "\n"):
stdscr.addstr(screen_height /4 + line_num, 10, line)
line_num = line_num + 1
stdscr.refresh()
sleep(1)
stdscr.erase()
init_game()
locks = []
for i in range(2):
lock = thread.allocate_lock()
lock.acquire()
locks.append(lock)
thread.start_new_thread(looper, ('move_ball', locks[0]))
thread.start_new_thread(looper, ('move_pad', locks[1]))
while locks[0].locked() and locks[1].locked: pass # main loop
except _curses.error, diag:
msg = 'Your terminal is too small: ' + str(diag)
except 'dd':
msg = 'Game exit abnormally.'
else:
msg = 'Game stopped.'
# out of loop means stop
for i in range(2):
if locks[i].locked(): locks[i].release()
height, width = stdscr.getmaxyx()
if height - 1 < screen_height or width - 1 < screen_width:
msg = 'Your terminal is shrinked.'
# out of loop means stop
curses.curs_set(1)
stdscr.keypad(0)
curses.nocbreak()
curses.echo()
curses.endwin()
print msg

[/code]

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postedApr 28, '06 at 8:58a
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