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#!/usr/bin/env python |
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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/Playng-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.cucul_set_color_ansi(cv, 0x05, 0x00) |
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for p in self.body: |
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lcaca.cucul_put_char(cv, p[0], p[1], ord('o')) |
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lcaca.cucul_set_color_ansi(cv, 0x02, 0x00) |
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lcaca.cucul_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.cucul_set_color_ansi(cv, 0x03, 0x00) |
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lcaca.cucul_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.cucul_set_color_ansi(cv, 0x04, 0x00) |
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lcaca.cucul_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.cucul_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.cucul_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) |
sam