用 Python 写游戏 第一篇 课后习题答案
用 Python 写游戏 第一篇 课后习题答案
第一篇课后练习
这里我留下一个思考题, 我们平时操作游戏的时候, 不会一直不停的按键盘, 那样太累, 怎么样把上面的程序改成当我们按下方向键的时候, 圆一直移动呢?
这里给个提示, 你还需要实现 on_key_up 函数, 来获得我们松开键盘按键的信息.
答案
player_pos_x = 100
player_pos_y = 100
def draw():
screen.clear()
screen.draw.filled_circle((player_pos_x, player_pos_y), 3, (255, 255, 255))
up = False
down = False
left = False
right = False
def on_key_down(key):
global up,down, left,right
if key == keys.UP:
up = True
elif key == keys.DOWN:
down = True
elif key == keys.LEFT:
left = True
elif key == keys.RIGHT:
right = True
def update():
global up, down, left, right, player_pos_x, player_pos_y
if up:
player_pos_y = player_pos_y - 1
if down:
player_pos_y = player_pos_y + 1
if left:
player_pos_x = player_pos_x - 1
if right:
player_pos_x = player_pos_x + 1
def on_key_up(key):
global down,up,left,right
if key == keys.UP:
up = False
elif key == keys.DOWN:
down = False
elif key == keys.LEFT:
left = False
elif key == keys.RIGHT:
right = False
该习题完成后, 我们就有了一个可以较自由操作的主角了, 期待接下来的课程吧.
Posted By 九天雁翎 at 九天雁翎的博客 on 2020年03月07日