Python : Turtle库--3.4 绘制谢尔宾斯基三角形

import turtle

def draw_triangle(points, color, t):
t.fillcolor(color)
t.up()
t.goto(points[0][0], points[0][6])
t.down()
t.begin_fill()
t.goto(points[1][0], points[1][7])
t.goto(points[2][0], points[2][8])
t.goto(points[0][0], points[0][9])
t.end_fill()

def get_mid(point1, point2):
return (point1[0] + point2[0]) / 2, (point1[1] + point2[1]) / 2

def sierpinski(points, degree, t):
color_map = [‘blue’, ‘red’, ‘green’, ‘yellow’, ‘violet’, ‘orange’, ‘white’,]

draw_triangle(points, color_map[degree], t)

if degree > 0:
    sierpinski([points[0], get_mid(points[0], points[1]), get_mid(points[0], points[2])], degree - 1, t)

    sierpinski([points[1], get_mid(points[0], points[1]), get_mid(points[1], points[2])], degree - 1, t)

    sierpinski([points[2], get_mid(points[0], points[2]), get_mid(points[1], points[2])], degree - 1, t)

if name == “main”
t = turtle.Turtle()
t.speed(5)
win = turtle.Screen()

points = [[-100, -50], [0, 100], [100, -50]]
sierpinski(points, 3, t)

win.exitonclick()