有没有办法在 Python Turtle Graphics 中让 turtle 移动得更慢

发布于06月06日

我已经制作了一个程序，通过按下键盘来移动 turtle 的位置，但是有没有办法让它以较小的像素增量移动？

还有，有没有可能让 turtle 上下移动，而不是只左右移动？

from turtle import Screen, Turtle
TURTLE_SIZE = 200

# functions
def go_left():
    t.direction = 'left'

def go_right():
    t.direction = 'right'

screen = Screen()
screen.setup(1152,648)
screen.tracer(0)

# player
t = Turtle()
t.shape("circle")
t.speed("slowest")
t.color("blue")
t.penup()
t.setx(338)
t.sety(0)
t.direction = 'stop'

# Keyboard
screen.onkeypress(go_left, 'Left')
screen.onkeypress(go_right, 'Right')
screen.listen()

while True:
    x = t.xcor()

    if t.direction == 'left':
        if x > TURTLE_SIZE - 576:
            x -= 3
            t.setx(x)
        else:
            t.direction = 'stop'
    elif t.direction == 'right':
        if x < 576 - TURTLE_SIZE:
            x += 3
            t.setx(x)
        else:
            t.direction = 'stop'

    screen.update()

screen.mainloop()

推荐答案

你的圆点移动如此之快的原因是因为你的while True圈.

我将大部分逻辑移到了go_个函数中，并为您添加了一个上下函数.

from turtle import Screen, Turtle
TURTLE_SIZE = 200

def go_left():
    x = t.xcor()
    if x > TURTLE_SIZE - 576:
        x -= 3
        t.setx(x)
    screen.update()

def go_right():
    x = t.xcor()
    if x < 576 - TURTLE_SIZE:
        x += 3
        t.setx(x)
    screen.update()

def go_up():  # added this function
    y = t.ycor()
    if y < 576 - TURTLE_SIZE:
        y += 3
        t.sety(y)
    screen.update()

def go_down():  # added this function
    y = t.ycor()
    if y < 576 - TURTLE_SIZE:
        y -= 3
        t.sety(y)
    screen.update()

screen = Screen()
screen.setup(1152,648)
screen.tracer(0)

t = Turtle()
t.shape("circle")
t.speed("slowest")
t.color("blue")
t.penup()
t.setx(338)
t.sety(0)
screen.update()

# Keyboard
screen.onkeypress(go_left, 'Left')
screen.onkeypress(go_down, 'Down')   # added this listener
screen.onkeypress(go_up, 'Up')       # added this listner
screen.onkeypress(go_right, 'Right')
screen.listen()
screen.mainloop()