猫史档案馆

【作品展示】

 

【作品介绍】

咋们的五星红旗

 

【作品源代码】

import turtle

myscreen = turtle.Screen()
myscreen.setworldcoordinates(0, 0, 800, 800)

mypen = turtle.Pen()


# 绘制旗面
def rectangle(x, y, width, height, color):
    # 设置画笔
    setpen(x, y, color)
    # 开始绘制
    mypen.begin_fill()
    for i in range(2):
        mypen.forward(width)
        mypen.right(90)
        mypen.forward(height)
        mypen.right(90)
    mypen.end_fill()


# 绘制五角星
def starmac(x, y, angle, length, color):
    # 设置画笔
    setpen(x, y, color)
    # 设置画笔朝向
    mypen.setheading(angle)
    # 开始绘制
    mypen.begin_fill()
    for i in range(5):
        mypen.forward(length)
        mypen.left(72)
        mypen.forward(length)
        mypen.right(144)
    mypen.end_fill()


# 设置画笔
def setpen(x, y, color):
    mypen.penup()
    mypen.setheading(0)
    mypen.goto(x, y)
    mypen.pencolor(color)
    mypen.fillcolor(color)
    mypen.pendown()
    # 设置画笔为 0 度
    mypen.setheading(0)


# 主程序
def main():
    per = 20
    mx, my = 100, 700
    # 旗面
    width, height = 30 * per, 20 * per
    rectangle(mx, my, width, height, "red")
    # 大五角星
    import math
    R = 3 * per
    ox, oy = mx + 5 * per, my - 5 * per
    fa = R * math.sin(math.radians(72))
    fo = R * math.cos(math.radians(72))
    ax, ay = ox - fa, oy + fo
    length = (R - R * math.cos(math.radians(72))) / math.cos(math.radians(18))
    starmac(ax, ay, 0, length, "yellow")
    # 第 1 颗小五角星
    R = 1 * per
    ox, oy = mx + 10 * per, my - 2 * per
    angle = math.degrees(math.atan(3 / 5))
    oh = R * math.sin(math.radians(angle))
    ah = R * math.cos(math.radians(angle))
    ax, ay = ox - ah, oy - oh
    length = (R - R * math.cos(math.radians(72))) / math.cos(math.radians(18))
    starmac(ax, ay, angle + 18, length, "yellow")
    # 第 2 颗小五角星
    R = 1 * per
    ox, oy = mx +  12* per, my - 4 * per
    angle = math.degrees(math.atan(1 / 7))
    oh = R * math.sin(math.radians(angle))
    ah = R * math.cos(math.radians(angle))
    ax, ay = ox - ah, oy - oh
    length = (R - R * math.cos(math.radians(72))) / math.cos(math.radians(18))
    starmac(ax, ay, angle + 18, length, "yellow")
    # 第 3 颗小五角星
    R = 1 * per
    ox, oy = mx + 12 * per, my - 7 * per
    angle = math.degrees(math.atan(2 / 7))
    oh = R * math.sin(math.radians(angle))
    ah = R * math.cos(math.radians(angle))
    ax, ay = ox - ah, oy - oh
    length = (R - R * math.cos(math.radians(72))) / math.cos(math.radians(18))
    starmac(ax, ay, -(angle - 18), length, "yellow")
    # 第 4 颗小五角星
    R = 1 * per
    ox, oy = mx + 10 * per, my - 9 * per
    angle = math.degrees(math.atan(4 / 5))
    oh = R * math.sin(math.radians(angle))
    ah = R * math.cos(math.radians(angle))
    ax, ay = ox - ah, oy + oh
    length = (R - R * math.cos(math.radians(72))) / math.cos(math.radians(18))
    starmac(ax, ay, -(angle - 18), length, "yellow")
    # 隐藏画笔
    mypen.hideturtle()
    turtle.done()


main()

 

【提示】

部分含有Python第三方库相关内容的作品，在海龟编辑器网页端无法运行哦！如遇到这种情况，可以打开下面的链接，下载海龟编辑器客户端：

https://python.codemao.cn