turtle.Screen().screensize() 没有输出正确的屏幕尺寸

问题描述

我已经写了一些代码来在屏幕周围随机放置点；但是，它并没有覆盖整个屏幕:

I have written some code to place dots all around the screen randomly; however, it does not cover the entire screen:

import turtle
import random

t = turtle.Turtle()

color = ["red", "green", "blue", "pink", "yellow", "purple"]
t.speed(-1)
for i in range(0, 500):
    print(turtle.Screen().screensize())
    z = turtle.Screen().screensize()
    x = z[0]
    y = z[1]
    t.color(color[random.randint(0,5)])
    t.dot(4)
    t.setposition(random.randint(-x,x), random.randint(-y,y))


turtle.done()

输出

推荐答案

屏幕"是指海龟的逻辑边界(可滚动区域)，可能与窗口大小不同.

"Screen" refers to the turtle's logical boundaries (scrollable area) which may not be the same as the window size.

调用turtle.setup(width, height) 设置窗口大小，然后使用 turtle.window_width() 和 turtle.window_height() 函数来访问它的大小.

Call turtle.setup(width, height) to set your window size, then use the turtle.window_width() and turtle.window_height() functions to access its size.

您还可以确保 screensize 与窗口大小匹配，然后照常使用它.使用 turtle.screensize(宽度、高度).

You could also make sure the screensize matches the window size, then use it as you are doing. Set the screen size with turtle.screensize(width, height).

此外，您的随机数选择超出范围.使用

Additionally, your random number selection is out of bounds. Use

random.randint(0, width) - width // 2

将范围移动到以 0 为中心.

to shift the range to be centered on 0.

组合起来:

import turtle
import random

turtle.setup(480, 320)
color = ["red", "green", "blue", "pink", "yellow", "purple"]
t = turtle.Turtle()
t.speed("fastest")

for _ in range(0, 100):
    t.color(random.choice(color))
    t.dot(4)
    w = turtle.window_width()
    h = turtle.window_height()
    t.setposition(random.randint(0, w) - w // 2, random.randint(0, h) - h // 2)

turtle.exitonclick()

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