169 lines
4.5 KiB
Python
169 lines
4.5 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# snake.py
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# Playing with ctypes and libcaca
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# http://mornie.org/blog/2007/03/25/Playing-with-ctypes-and-libcaca/
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#
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# Copyright (C) 2007 Daniele Tricoli aka Eriol <eriol@mornie.org>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# -- Changelog
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# * 23/03/07
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# Initial release
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# * 20/10/07
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# Applied patch by Sam Hocevar: check for caca_get_event's return value
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# and added caca_event's missing first member
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# * 25/10/07
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# Updated for newer libcaca API (Sam Hocevar)
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import ctypes as C
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import random
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import sys
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import time
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CANVAS_WIDTH = 80
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CANVAS_HEIGHT = 40
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CENTER_X = CANVAS_WIDTH / 2
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CENTER_Y = CANVAS_HEIGHT / 2
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UP = 273
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DOWN = 274
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LEFT = 275
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RIGHT = 276
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class ev(C.Structure):
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_fields_ = [('opaque_structure', C.c_char_p * 32)]
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class Snake(object):
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def __init__(self, center_point, length):
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self.head = center_point
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self.body = []
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for y in xrange(self.head[1] + 1, self.head[1] + length + 1):
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self.body.append((self.head[0], y))
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def move(self, direction):
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phead = tuple(self.head)
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if direction == 'UP':
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self.head[1] -=1
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elif direction == 'DOWN':
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self.head[1] +=1
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elif direction == 'LEFT':
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self.head[0] -=1
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elif direction == 'RIGHT':
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self.head[0] +=1
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self.body = [phead] + self.body[:-1]
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def grow(self):
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self.body += [tuple(self.head)] * 2
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def draw(self):
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global cv
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lcaca.caca_set_color_ansi(cv, 0x05, 0x00)
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for p in self.body:
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lcaca.caca_put_char(cv, p[0], p[1], ord('o'))
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lcaca.caca_set_color_ansi(cv, 0x02, 0x00)
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lcaca.caca_put_char(cv, self.head[0], self.head[1], ord('@'))
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lcaca.caca_refresh_display(dp)
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class Target(object):
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def __init__(self):
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self.total = 0
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def random(self, width, height):
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self.x = int(random.uniform(1, width))
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self.y = int(random.uniform(1, height))
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self.value = random.choice(range(1,10))
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def sum(self):
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self.total += self.value
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def draw(self):
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global cv
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lcaca.caca_set_color_ansi(cv, 0x03, 0x00)
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lcaca.caca_put_char(cv, self.x, self.y, ord(str(self.value)))
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lcaca.caca_refresh_display(dp)
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def draw_border():
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lcaca.caca_set_color_ansi(cv, 0x04, 0x00)
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lcaca.caca_draw_box(cv,
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0,
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0,
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CANVAS_WIDTH - 1,
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CANVAS_HEIGHT - 1,
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ord('#'))
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event = ev()
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lcaca = C.cdll.LoadLibrary('libcaca.so.0')
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cv = lcaca.caca_create_canvas(CANVAS_WIDTH, CANVAS_HEIGHT)
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dp = lcaca.caca_create_display(cv)
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lcaca.caca_set_display_title(dp, "snake.py - playing with ctypes and libcaca")
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s = Snake([CENTER_X, CENTER_Y], 5)
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t = Target()
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t.random(CANVAS_WIDTH - 2, CANVAS_HEIGHT - 2)
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draw_border()
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s.draw()
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t.draw()
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lcaca.caca_get_event(dp, 0x0001, C.byref(event), -1)
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while True:
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while lcaca.caca_get_event(dp, 0x0001, C.byref(event), 0):
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ch = lcaca.caca_get_event_key_ch(C.byref(event))
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if ch == 113: # 'q' pressed
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sys.exit()
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elif ch == UP:
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d = 'UP'
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elif ch == DOWN:
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d = 'DOWN'
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elif ch == LEFT:
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d = 'LEFT'
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elif ch == RIGHT:
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d = 'RIGHT'
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try:
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s.move(d)
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except NameError:
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pass
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if (tuple(s.head) in s.body[1:] or
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not 0 < s.head[0] < CANVAS_WIDTH - 1 or
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not 0 < s.head[1] < CANVAS_HEIGHT - 1):
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print 'Game Over!'
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print 'Total score:', t.total
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sys.exit()
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elif tuple(s.head) == (t.x, t.y):
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t.sum()
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t.random(CANVAS_WIDTH - 2, CANVAS_HEIGHT - 2)
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s.grow()
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lcaca.caca_clear_canvas(cv)
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draw_border()
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s.draw()
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t.draw()
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time.sleep(0.1)
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