class SnakeScene(SpritePlane): def __init__(self,bg=(0,0,0),snake=(0,240,0),apple=(255,0,0),snake_max_len=4): super(SnakeScene,self).__init__(tempo=360,bg=bg) self.snake = Sprite(color=snake,blend=False,z=10,trail=snake_max_len) self.add_sprite(0,0,self.snake) self.apple_time = 0 self.apple = Sprite(color=apple,blend=False,z=5) self.add_sprite(0,0,self.apple) self.snake_reset() self.apple_reset() self.points = 0 self._snake_dir = rint(0,4) def add_point(self): p = Sprite(color=(255,255,255),blend=False,z=0) self.add_sprite(*self.wall1d_to_plane2d(self.points),sprite=p) self.points +=1 def apple_reset(self): self.apple_time = 0 self.move_to(self.apple,*self.random_visible_plane2d()) def snake_reset(self): self.move_to(self.snake,*self.random_visible_plane2d()) def up(self): self._snake_dir = 0 def right(self): self._snake_dir = 1 def down(self): self._snake_dir = 2 def left(self): self._snake_dir = 3 def _snake_step(self): if self.snake.loc() == self.apple.loc(): # self.snake_reset() self.apple_reset() self.add_point() r = self._snake_dir if r == 0: self.move_up(self.snake) elif r == 1: self.move_right(self.snake) elif r == 2: self.move_down(self.snake) else: # r == 3 self.move_left(self.snake) def step(self,seconds): if not super(SnakeScene,self).step(seconds): return False #print 'step %s' % seconds for i in xrange(int(self.beats())): self._snake_step() self.apple_time += 1 if self.apple_time >= 10: self.apple_reset() return True def rgb(self,base_rgb=None): if self.points < 4: return super(SnakeScene,self).rgb() else: return [(rint(0,255),rint(0,255),rint(0,255)) for i in xrange(0,PANEL_NUM)]
