缩放乌龟绘图 python

Question

我正在尝试编写一个 python 脚本，它需要 n 并根据该顺序绘制一条希尔伯特曲线。我的算法工作正常，它绘制曲线并在更改窗口大小时重新调整大小。但是，我的绘图没有居中并且可能超出范围。我想在没有太多空白空间或超出范围的情况下使用屏幕缩放曲线这是我的代码：import sysimport turtlefrom turtle import Turtle, Screen#Drawing the hilbert curve using recursion.#Var: turtle if for the Turtle, A is the length of the lines, parity is for inverting the direction, and n is for the orderdef hilbert_curve(turtle, A, parity, n):if n < 1:    returnturtle.left(parity * 90)hilbert_curve(turtle, A, - parity, n - 1)turtle.forward(A)turtle.right(parity * 90)hilbert_curve(turtle, A, parity, n - 1)turtle.forward(A)hilbert_curve(turtle, A, parity, n - 1)turtle.right(parity * 90)turtle.forward(A)hilbert_curve(turtle, A, - parity, n - 1)turtle.left(parity * 90)def main():    #Rescale the drawing when changing the window size    def onResize(x=0, y=0):     width = my_win.window_width()     hight = my_win.window_height()     my_win.setworldcoordinates(-width-1, -hight-1, width-1, hight-1)     my_win.ontimer(onResize,100)#initilize the turtle.turtle = Turtle()#initilize the screen.my_win = Screen()w = my_win.window_width()h = my_win.window_height()A = 20onResize()rule = 1my_win.tracer(False)if len(sys.argv) < 2:    print("Please declare the order after calling the program name")    returnn = int(sys.argv[1])hilbert_curve(turtle,A,rule,n)my_win.update()my_win.mainloop()main()**如果有人能解决我的问题，我将不胜感激，谢谢**

Answer 1

我的算法工作正常，它绘制曲线并在更改窗口大小时重新调整大小。

不，它没有。您的绘图永远不会缩放，它保持相同的大小。并且main()设置缩放代码的函数永远不会被调用，因为它遵循mainloop()将控制权移交给 tkinter 事件处理程序的调用：

my_win.mainloop()

main()

使用事件计时器是解决此问题的错误方法。然而，由于 turtle 没有暴露底层的 tkinter 窗口调整大小事件，让我们一起玩这个模型，而不是下降到 tkinter 层。我会这样做：

from turtle import Turtle, Screen

def hilbert_curve(turtle, A, parity, n):

    '''

    Draw the hilbert curve using recursion.

    Arguments:

        turtle is for the Turtle,

        A is the length of the lines,

        parity is for inverting the direction,

        and n is for the order

    '''

    if n < 1:

        return

    turtle.left(parity * 90)

    hilbert_curve(turtle, A, - parity, n - 1)

    turtle.forward(A)

    turtle.right(parity * 90)

    hilbert_curve(turtle, A, parity, n - 1)

    turtle.forward(A)

    hilbert_curve(turtle, A, parity, n - 1)

    turtle.right(parity * 90)

    turtle.forward(A)

    hilbert_curve(turtle, A, - parity, n - 1)

    turtle.left(parity * 90)

def main():

    order = 4

    parity = 1

    length = 100 / (4 * order - 1)

    def onResize():

        # Rescale drawing when changing window size (the hard way)

        turtle.reset()

        screen.setworldcoordinates(0, 0, 100, 100)

        hilbert_curve(turtle, length, parity, order)

        screen.update()

        screen.ontimer(onResize, 1000)

    screen = Screen()

    screen.tracer(False)

    turtle = Turtle()

    onResize()

    screen.mainloop()

main()

即无论窗口大小如何都保持恒定的虚拟坐标，并重新绘制曲线以适应当前窗口大小。顺便说一句，我不是写了这个希尔伯特曲线代码吗？确保从哪里获得它！