Question

我正在尝试使用乌龟图形创建奥地利国旗。这是我的示例代码：

 import turtle

def rectangle(t,wdth,ht,c):
 t.fillcolor(c)
 t.begin_fill()
 for i in range(2):
    t.forward(ht)
    t.left(90)
    t.forward(wdth)
    t.left(90)
 t.end_fill()

def rectangle2(t,wdth,ht,c):
 t.fillcolor(c)
 t.begin_fill()
 for i in range(2):
    t.forward(ht)
    t.left(90)
    t.forward(wdth)
    t.left(90)
 t.end_fill()

def flag():
 flag = turtle.Turtle()
 rectangle(flag,50,250,"red")

turtle.up()

def flag2():
 flag= turtle.Turtle()
 rectangle(flag, 50, 250, "white")

flag()
flag2()
turtle.done()

我的代码创建了一个红色矩形，我打算将其作为标志的底部三分之一。我希望乌龟向上移动，成为奥地利国旗的中间部分，这是一个白色的矩形。

我的代码按预期创建了红色矩形，然后乌龟将红色矩形重新着色为白色。这给我留下了一个白色矩形，而不是一个红色矩形和一个白色矩形。

Answer 1

编辑：我将width替换为height，正如@cdlane在评论中正确指出的那样。

在绘制白色矩形之前，使用forward/left/right或goto(x, y)将乌龟移动到正确的位置。

import turtle

def rectangle(height, width, color):
    turtle.fillcolor(color)
    turtle.begin_fill()
    for _ in range(2):
        turtle.forward(width)
        turtle.left(90)
        turtle.forward(height)
        turtle.left(90)
    turtle.end_fill()

rectangle(50, 250, "red") # bottom red

turtle.left(90)     #
turtle.forward(50)  # go 50 pixel up
turtle.right(90)    # 

rectangle(50, 250, "white") # middle white

turtle.left(90)     #
turtle.forward(50)  # go 50 pixel up
turtle.right(90)    #

rectangle(50, 250, "red") # top red

turtle.done()

Answer 2

三个想法：你让它变得比必要更难;你需要在维基百科中查找奥地利国旗以获得适当的宽高比;这样做的方法不止一种。

首先，让我们简化并清理您的代码：

from turtle import Turtle, Screen

HEIGHT = 120
WIDTH = 3 * HEIGHT / 2

def rectangle(turtle, width, height, color):
    turtle.fillcolor(color)

    turtle.begin_fill()
    for _ in range(2):
        turtle.forward(width)
        turtle.left(90)
        turtle.forward(height)
        turtle.left(90)
    turtle.end_fill()

def flag(turtle):
    turtle.pencolor('black')
    rectangle(turtle, WIDTH, HEIGHT, 'white')
    rectangle(turtle, WIDTH, HEIGHT / 3, 'red')
    turtle.sety(turtle.ycor() + 2 * HEIGHT / 3)
    rectangle(turtle, WIDTH, HEIGHT / 3, 'red')

yertle = Turtle(visible=False)

screen = Screen()

flag(yertle)

screen.mainloop()

但是对于这样的颜色块，我更喜欢标记到绘图：

from turtle import Turtle, Screen

HEIGHT = 120
WIDTH = 3 * HEIGHT / 2

STAMP_SIZE = 20

def flag(turtle, width, height):
    turtle.penup()

    turtle.color('black', 'white')
    turtle.shapesize(height / STAMP_SIZE, width / STAMP_SIZE)
    turtle.stamp()

    turtle.color('black', 'red')
    turtle.sety(turtle.ycor() - height / 3)
    turtle.shapesize(height / 3 / STAMP_SIZE, width / STAMP_SIZE)
    turtle.stamp()

    turtle.sety(turtle.ycor() + 2 * height / 3)
    turtle.stamp()

yertle = Turtle('square', visible=False)

screen = Screen()

flag(yertle, WIDTH, HEIGHT)

screen.mainloop()

最后，让我们把它简化为非常简单的乌龟逻辑：

from turtle import Turtle, Screen

import tkinter as _
_.ROUND = _.BUTT

HEIGHT = 120
WIDTH = 3 * HEIGHT / 2

def flag(turtle, width, height):
    turtle.pensize(height)
    turtle.color('red')
    turtle.forward(width)

    turtle.pensize(height / 3)
    turtle.color('white')
    turtle.backward(width)

yertle = Turtle(visible=False)

screen = Screen()
screen.bgcolor('black')

flag(yertle, WIDTH, HEIGHT)

screen.mainloop()

如何在Python中创建奥地利国旗？

2 个答案: