Python Turtle 点无缘无故闪烁

Question

在我的程序中，为了模拟运动，添加了点的x位置，清除旧点，绘制新点。

def drawing_zombies():

  clear()

  for zombie in zombies:

    goto(zombie.x, zombie.y)

    dot(20, 'red')

  update()

def movement():

  for zombie in zombies:

    zombie.x -= 0.5

  drawing_zombies()

我见过一个极其相似的程序运行，它的点不闪，看起来是真的在动。但是，当我的程序运行时，它会闪烁（消失和重新出现的速度非常快）

其余代码在下面（除了一堆定义矢量类的东西，它与工作程序中的相同，所以它里面没有任何问题）

class vector(collections.abc.Sequence):

    precision = 6

    __slots__ = ('_x', '_y', '_hash')

    def __init__(self, x, y):

        self._hash = None

        self._x = round(x, self.precision)

        self._y = round(y, self.precision)

    #The rest of the vector class would have been here

zombies = []

placement_options = [0, 1, 2, -1]

def new_zombie():

    placement_level = random.choice(placement_options)

    z = vector(200, placement_level*100)

    print(placement_level)

    zombies.append(z)

def drawing_zombies():

  clear()

  for zombie in zombies:

    goto(zombie.x, zombie.y)

    dot(20, 'red')

  update()

def movement():

  for zombie in zombies:

    zombie.x -= 0.5

  drawing_zombies()

  for z in zombies:

    if z.x < -200:

      done()

  ontimer(movement(), 50)

def gameplay():

  setup(420, 420, 370, 0)

  hideturtle()

  up()

  new_zombie()

  movement()

  done()

gameplay()

Answer 1

您可以使用该tracer(False)功能来禁用屏幕更新。所以基本上，所有的绘图都是在内存中完成的，并且会在你调用时一次性复制到屏幕上tracer(True)。def drawing_zombies():&nbsp; tracer(False)&nbsp; clear()&nbsp; for zombie in zombies:&nbsp; &nbsp; goto(zombie.x, zombie.y)&nbsp; &nbsp; dot(20, 'red')&nbsp; update()&nbsp; tracer(True)