def get_sub_vec(va, vb):
	return (va[0]-vb[0], va[1]-vb[1], va[2]-vb[2])

def get_add_vec(va, vb):
	return (va[0]+vb[0], va[1]+vb[1], va[2]+vb[2])

scene = xshade.scene()
e_v = scene.camera.eye
t_v = scene.camera.target
goal_v = (4750, -3250)
import random
walk_vec = get_sub_vec(t_v, e_v)
if walk_mode == 0:	#forward
	int_t_v = (int(round(t_v[0])), int(round(t_v[2])))
	if map_data.count(int_t_v) == 0:
		e_v = get_add_vec(e_v, walk_vec)
		t_v = get_add_vec(t_v, walk_vec)
	else:
		n = random.randint(0,3)
		if n == 0:
			xshade.show_message_box('痛っ！', False)
		elif n == 1:
			xshade.show_message_box('壁だ！', False)
		elif n == 2:
			xshade.show_message_box('進めない！', False)
		elif n == 3:
			xshade.show_message_box('無理！', False)
elif walk_mode == 1:	#left_turn
	t_v = (t_v[2]-e_v[2]+e_v[0], t_v[1], e_v[0]-t_v[0]+e_v[2])
elif walk_mode == 2:	#right_turn
	t_v = (e_v[2]-t_v[2]+e_v[0], t_v[1], t_v[0]-e_v[0]+e_v[2])
elif walk_mode == 3:	#back
	sub_v = get_sub_vec(e_v, walk_vec)
	int_t_v = (int(round(sub_v[0])), int(round(sub_v[2])))
	if map_data.count(int_t_v) == 0:
		e_v = get_sub_vec(e_v, walk_vec)
		t_v = get_sub_vec(t_v, walk_vec)
	else:
		n = random.randint(0,3)
		if n == 0:
			xshade.show_message_box('痛っ！', False)
		elif n == 1:
			xshade.show_message_box('壁だ！', False)
		elif n == 2:
			xshade.show_message_box('進めない！', False)
		elif n == 3:
			xshade.show_message_box('無理！', False)
scene.camera.eye = e_v
scene.camera.target = t_v
if (int(round(t_v[0])), int(round(t_v[2]))) == goal_v:
	xshade.show_message_box('おめでとう！無事脱出できました。', False)