473,322 Members | 1,540 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,322 software developers and data experts.

A curses-game I need help with.

Hello.
The last weeks I've been coding a roguelike (you know, like nethack) in
python using the nCurses library. Some week ago I ran into a problem:
When I made the object for messagebar-output, I found a bug that I
can't figure out (believe me; I've tried everything and asked for help
several times on the IRC-channel).

The updateMsg() and iMsg() takes a list of message-lines as argument
(or process a string to a list), and it'll output each of them to the
messagebar, output a sign that say: More, and wait for the user to hit
space, and then output another line. The last line will just be
outputed, without waiting for the user to hit space. Thou, that doesn't
work. It doesn't output the last line. Not when there are more than one
line, and not when there is just that one line.

I've tried calling noutrefresh() and doupdate() instead of just
refresh(), I've rebuilt the structure of the methods, and done all
sorts of things. By writing debug-messages to a file, I've understood
that the last addstr() DO output the line, but the refresh isn't
working. Or something else isn't working.

Can you help?

I'll just append all my code here (for anyone to test), so you who
doesn't want to read this humble beginners code can skip to another
message. Thank you for your time.

(So far I've understood, is that iMsg() and updateMsg() is wrong. Line
71 and 92.)
try:
import curses
except ImportError:
print "Missing the Curses-library."
print "Please install the curses-library correctly."
SystemExit

#---------------------------------------------------------------

class Game:
"""The Game-object. Controls the windows, global settings and so
on."""
def __init__(self):
self.mainwin = curses.initscr()

## Some basic settings
curses.noecho()
curses.cbreak()
self.mainwin.keypad(1)
curses.curs_set(0)

self.msg = Msg()
self.msg.msg(["Welcome to The Game! Lets watch another fearless
samurai", "get beaten bloody in the arena!"])

self.mainwin.addstr(3,15, '+' + '-' * 62 + '+')
self.mainwin.addstr(22,15, '+' + '-' * 62 + '+')
self.mainwin.vline(4,15, '|', 18)
self.mainwin.vline(4,78, '|', 18)
movedir = {
'up': {'x':0, 'y':-1},
'down': {'x':0, 'y':+1},
'right': {'x':+1, 'y':0},
'left': {'x':-1, 'y':0},
'downright': {'x':+1, 'y':+1},
'upright': {'x':+1, 'y':-1},
'downleft': {'x':-1, 'y':+1},
'upleft': {'x':-1, 'y':-1}
}

walls = (
ord('|'),
ord('+'),
ord('-')
)

#---------------------------------------------------------------

class Msg:
"""The messagehandeling and -bar system."""
def __init__(self):
self.msgs = []

def printMore(self):
# Print the little #More#-sign
game.mainwin.addch(1, 71, curses.ACS_BLOCK, curses.A_REVERSE)
game.mainwin.addstr(1, 72, "More", curses.A_REVERSE)
game.mainwin.addch(1, 76, curses.ACS_BLOCK, curses.A_REVERSE)

def msg(self, msg):
if isinstance(msg, str):
self.msgs.append(msg)
else:
self.msgs = self.msgs + msg

def ereasMsg(self):
for count in range(0,2):
game.mainwin.move(count,0)
game.mainwin.clrtoeol()

def updateMsg(self):
count = len(self.msgs)
for msg in self.msgs: # Print one msg after
another
game.mainwin.addstr(0,0, msg) # Print the actual message
if count 1: # If there are two or more
laft, print a #More#-sign.
count -= 1
self.printMore()
game.mainwin.refresh()
while 1:
next = game.mainwin.getch()
if next == ord(' '):
self.ereasMsg()
break
else:
continue
else:
game.mainwin.refresh()

self.msgs = [] # When done, kill all messages
return True

def iMsg(self, msg):
"""Same as msg(), but the screen will refresh instantly.
'i' is standing for Interface or Instant message."""
if isinstance(msg, str):
msg = [msg] # List'it!
count = len(msg)
for item in msg:
if count 1:
count -= 1
self.printMore()
game.mainwin.addstr(0,0, item)
game.mainwin.refresh()
while 1:
next = game.mainwin.getch()
if next == ord(' '):
self.ereasMsg()
break
else:
continue
else:
game.mainwin.addstr(0,0, item)

return
#---------------------------------------------------------------

class Samurai:
"""This is the object of the mighty Samurai. Phe4r him. He can
move.
He can spawn. He will be able to kick som robo butt too,
but not now."""
def __init__(self):
## Configuring game values.
self.loc = {
"x": 20,
"y": 8
}
self.samuraichar = ord("X")

# spawn
game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

def move(self, dir, speed=1):
# Move in dir speed number of times.
for count in range(1, speed + 1):
newX = self.loc['x'] + game.movedir[dir]['x']
newY = self.loc['y'] + game.movedir[dir]['y']

# Checks that all is clear.
if game.mainwin.inch(newY, newX) not in game.walls:

# Delete old
game.mainwin.addch(self.loc['y'], self.loc['x'], ' ')

self.loc['x'] = newX
self.loc['y'] = newY
# Create a new character.
game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

else:
game.msg.iMsg("You can't go there.")
return

#---------------------------------------------------------------

def main():
global game, player
game = Game()
player = Samurai()

running = True
while running:
key_command = game.mainwin.getch()

if key_command == ord('8'): ## Movement-commands
player.move('up')

elif key_command == ord('2'):
player.move('down')

elif key_command == ord('4'):
player.move('left')

elif key_command == ord('6'):
player.move('right')

elif key_command == ord('7'):
player.move('upleft')

elif key_command == ord('9'):
player.move('upright')

elif key_command == ord('1'):
player.move('downleft')

elif key_command == ord('3'):
player.move('downright')

elif key_command == ord('Q'): ## Exit
break

elif key_command == ord('5'): ## Wait
pass

elif key_command == ord('x'): ## print location
game.msg.iMsg("X: " + str(player.loc['x']) + ", Y: " +
str(player.loc['y']))

elif key_command == ord('z'):
strlist = ""
for i in game.walls:
strlist = strlist + str(i) + " "
game.msg.iMsg(strlist)

elif key_command == ord('c'):
for count in range(0,2):
game.mainwin.move(count,0)
game.mainwin.clrtoeol()

else:
game.msg.iMsg("That is not a valid command.")

if len(game.msg.msgs) == 0: # If there are any msgs.
game.mainwin.refresh()
else:
game.msg.updateMsg()

game.msg.ereasMsg()
if __name__ == "__main__":
try:
import psyco
psyco.full()
except ImportError:
# Don't use something that doesn't exists.
pass

main()

curses.nocbreak(); game.mainwin.keypad(0); curses.echo()
curses.endwin()
(The code is GPL'ed, Martin Ahnelöv 06)

Oct 8 '06 #1
7 2805
Hi. I would like to know why no one have answered my post
http://groups.google.com/group/comp....24904058bd1734
..
It were my first post here (and on the Usenet overall), so I would like
to know what I did wrong. Too´many spellingmisstakes? Shitty code? No
one understands? No one got the answer? Should I wait a little longer?
Thank you.

Oct 9 '06 #2
"Gasten" <op*********@gmail.comwrites:
Can you help?
I'm not a guru on curses by any means, but I've moved one line
of your code and IMHO it works fine now.
Look below for the code I've changed.
I'll just append all my code here (for anyone to test), so you who
doesn't want to read this humble beginners code can skip to another
message. Thank you for your time.

(So far I've understood, is that iMsg() and updateMsg() is wrong. Line
71 and 92.)
try:
import curses
except ImportError:
print "Missing the Curses-library."
print "Please install the curses-library correctly."
SystemExit

#---------------------------------------------------------------

class Game:
"""The Game-object. Controls the windows, global settings and so
on."""
def __init__(self):
self.mainwin = curses.initscr()

## Some basic settings
curses.noecho()
curses.cbreak()
self.mainwin.keypad(1)
curses.curs_set(0)

self.msg = Msg()
self.msg.msg(["Welcome to The Game! Lets watch another fearless
samurai", "get beaten bloody in the arena!"])

self.mainwin.addstr(3,15, '+' + '-' * 62 + '+')
self.mainwin.addstr(22,15, '+' + '-' * 62 + '+')
self.mainwin.vline(4,15, '|', 18)
self.mainwin.vline(4,78, '|', 18)
movedir = {
'up': {'x':0, 'y':-1},
'down': {'x':0, 'y':+1},
'right': {'x':+1, 'y':0},
'left': {'x':-1, 'y':0},
'downright': {'x':+1, 'y':+1},
'upright': {'x':+1, 'y':-1},
'downleft': {'x':-1, 'y':+1},
'upleft': {'x':-1, 'y':-1}
}

walls = (
ord('|'),
ord('+'),
ord('-')
)

#---------------------------------------------------------------

class Msg:
"""The messagehandeling and -bar system."""
def __init__(self):
self.msgs = []

def printMore(self):
# Print the little #More#-sign
game.mainwin.addch(1, 71, curses.ACS_BLOCK, curses.A_REVERSE)
game.mainwin.addstr(1, 72, "More", curses.A_REVERSE)
game.mainwin.addch(1, 76, curses.ACS_BLOCK, curses.A_REVERSE)

def msg(self, msg):
if isinstance(msg, str):
self.msgs.append(msg)
else:
self.msgs = self.msgs + msg

def ereasMsg(self):
for count in range(0,2):
game.mainwin.move(count,0)
game.mainwin.clrtoeol()

def updateMsg(self):
count = len(self.msgs)
for msg in self.msgs: # Print one msg after
another
game.mainwin.addstr(0,0, msg) # Print the actual message
if count 1: # If there are two or more
laft, print a #More#-sign.
count -= 1
self.printMore()
game.mainwin.refresh()
while 1:
next = game.mainwin.getch()
if next == ord(' '):
self.ereasMsg()
break
else:
continue
else:
game.mainwin.refresh()

self.msgs = [] # When done, kill all messages
return True

def iMsg(self, msg):
"""Same as msg(), but the screen will refresh instantly.
'i' is standing for Interface or Instant message."""
if isinstance(msg, str):
msg = [msg] # List'it!
count = len(msg)
for item in msg:
if count 1:
count -= 1
self.printMore()
game.mainwin.addstr(0,0, item)
game.mainwin.refresh()
while 1:
next = game.mainwin.getch()
if next == ord(' '):
self.ereasMsg()
break
else:
continue
else:
game.mainwin.addstr(0,0, item)

return
#---------------------------------------------------------------

class Samurai:
"""This is the object of the mighty Samurai. Phe4r him. He can
move.
He can spawn. He will be able to kick som robo butt too,
but not now."""
def __init__(self):
## Configuring game values.
self.loc = {
"x": 20,
"y": 8
}
self.samuraichar = ord("X")

# spawn
game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

def move(self, dir, speed=1):
# Move in dir speed number of times.
for count in range(1, speed + 1):
newX = self.loc['x'] + game.movedir[dir]['x']
newY = self.loc['y'] + game.movedir[dir]['y']

# Checks that all is clear.
if game.mainwin.inch(newY, newX) not in game.walls:

# Delete old
game.mainwin.addch(self.loc['y'], self.loc['x'], ' ')

self.loc['x'] = newX
self.loc['y'] = newY
# Create a new character.
game.mainwin.addch(self.loc['y'], self.loc['x'],
self.samuraichar)

else:
game.msg.iMsg("You can't go there.")
return

#---------------------------------------------------------------

def main():
global game, player
game = Game()
player = Samurai()

running = True
while running:
key_command = game.mainwin.getch()
# I've moved erasing messages here
game.msg.ereasMsg()
>
if key_command == ord('8'): ## Movement-commands
player.move('up')

elif key_command == ord('2'):
player.move('down')

elif key_command == ord('4'):
player.move('left')

elif key_command == ord('6'):
player.move('right')

elif key_command == ord('7'):
player.move('upleft')

elif key_command == ord('9'):
player.move('upright')

elif key_command == ord('1'):
player.move('downleft')

elif key_command == ord('3'):
player.move('downright')

elif key_command == ord('Q'): ## Exit
break

elif key_command == ord('5'): ## Wait
pass

elif key_command == ord('x'): ## print location
game.msg.iMsg("X: " + str(player.loc['x']) + ", Y: " +
str(player.loc['y']))

elif key_command == ord('z'):
strlist = ""
for i in game.walls:
strlist = strlist + str(i) + " "
game.msg.iMsg(strlist)

elif key_command == ord('c'):
for count in range(0,2):
game.mainwin.move(count,0)
game.mainwin.clrtoeol()

else:
game.msg.iMsg("That is not a valid command.")

if len(game.msg.msgs) == 0: # If there are any msgs.
game.mainwin.refresh()
else:
game.msg.updateMsg()

game.msg.ereasMsg()
# I've moved this line
# game.msg.eraseMsg
>

if __name__ == "__main__":
try:
import psyco
psyco.full()
except ImportError:
# Don't use something that doesn't exists.
pass

main()

curses.nocbreak(); game.mainwin.keypad(0); curses.echo()
curses.endwin()
(The code is GPL'ed, Martin Ahnelöv 06)
--
HTH,
Rob
Oct 9 '06 #3
"Gasten" <op*********@gmail.comwrites:
I would like to know what I did wrong. Too´many spellingmisstakes?
Shitty code? No one understands? No one got the answer? Should I
wait a little longer? Thank you.
For my part, I skipped over your post because the code was far too long.

If you have a problem you'd like a lot of people to look at, the most
effective way is to make a short, complete example that demonstrates
exactly the problem you're trying to understand.

This approach has the bonus benefit that, in isolating the problem for
this purpose, you often gain a better understanding of it yourself
before posting it :-)

--
\ "Earth gets its price for what Earth gives us." -- James |
`\ Russell Lowell |
_o__) |
Ben Finney

Oct 9 '06 #4
Ben Finney wrote:
If you have a problem you'd like a lot of people to look at, the most
effective way is to make a short, complete example that demonstrates
exactly the problem you're trying to understand.
I should make a demo, you say? I'm gonna do that next time. Thanks.

Oct 10 '06 #5
Rob Wolfe wrote:
while running:
key_command = game.mainwin.getch()

# I've moved erasing messages here
game.msg.ereasMsg()
Man... I didn't even think of that. It's embarassing. Thanks. It works
perfect now. Again, thanks.

Gasten

Oct 10 '06 #6
try:
import curses
except ImportError:
print "Missing the Curses-library."
print "Please install the curses-library correctly."
SystemExit
~~~~~~~~~
Does this work ? Maybe *raise SystemExit* ??

Oct 10 '06 #7

Gasten wrote:
Rob Wolfe wrote:
while running:
key_command = game.mainwin.getch()
# I've moved erasing messages here
game.msg.ereasMsg()

Man... I didn't even think of that. It's embarassing. Thanks. It works
perfect now. Again, thanks.

Gasten
By the way, I also started doing a small rogue-like with a twist that
you control monsters. I used curses, too. It's very small and
incomplete, and I think there was a bug with monsters going through
walls, but it may help you..

You can find it at silmarill.org -programs -I, monster.

I'd be interested in looking at your game, as it gets imporved, too, do
you have a webpage for it yet? Please post..

Oct 10 '06 #8

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

1
by: Chris Share | last post by:
I've been writing an application using curses, and have been trying to handle resizing the terminal, if running in xterm or similar. Increasing the window size is working perfectly, however...
1
by: Cecil H. Whitley | last post by:
Hi, I had done a quick read of the curses documentation for python. Upon the second reading I found that curses is not supported on windows. I was wondering if it would be relatively simple to...
1
by: Matt Garman | last post by:
I've been working on a curses-based application in Python. My application effectively has a series of screens (or windows). When one screen closes, the previous screen should be exactly redrawin...
4
by: schwerdy | last post by:
Hi together, can someone provide an example of a curses application that works in a xterm that can be resized? I could not find any working example yet... Thanks in advance, Sebastian...
1
by: ale.of.ginger | last post by:
Now that I have gotoxy() down for moving the cursor around, I want that to be a result of keypresses (namely from the numpad -- 7 = NorthWest, 8 = North, 9 = NE, etc...). I have little clue how to...
0
by: mike.baranski | last post by:
So, can someone tell me why the following code is wrong? When you run it, it will place a . as you arrow key around the screen. Everything works, until you get to the bottom right corner of the...
3
by: Simon Morgan | last post by:
Hi, I'm having trouble with the following code. The problem is that the value read by getch() when I hit the up or down keys doesn't match curses.KEY_UP or curses.KEY_DOWN respectively. Other...
15
by: pinkfloydhomer | last post by:
I need to develop a cross-platform text-mode application. I would like to do it in Python and I would like to use a mature text-mode library for the UI stuff. The obvious choice, I thought, was...
5
by: 7stud | last post by:
I can't see to get any y, x coordinates to work with curses. Here is an example: import curses def my_program(screen): while True: ch = screen.getch() if ch == ord("q"): break
8
by: linkmaster032000 | last post by:
I tried curses.setsyx(2,3) in my script and it doesn't move the curses cursor. Any alternatives/solutions?
0
by: ryjfgjl | last post by:
ExcelToDatabase: batch import excel into database automatically...
0
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...
0
by: Vimpel783 | last post by:
Hello! Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
0
by: ArrayDB | last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
1
by: PapaRatzi | last post by:
Hello, I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
1
by: CloudSolutions | last post by:
Introduction: For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
1
by: Shællîpôpï 09 | last post by:
If u are using a keypad phone, how do u turn on JavaScript, to access features like WhatsApp, Facebook, Instagram....
0
by: af34tf | last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome former...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.