python与分形0009 - 谢尔宾斯基地毯

# coding=utf-8

import turtle
import random
import time

COLOR_TABLES = [
    ["#000000", "#000000", "#000000", "#000000" ],
    ["#00649F", "#97ECC5", "#00DBE7", "#01AAC1" ],
    ["#085F63", "#EF255F", "#FCCF4D", "#49BEB7" ],
    ["#9B5D73", "#FFF1C5", "#C38B8B", "#B0757C" ],
    ["#F0F0F0", "#FC5185", "#364F6B", "#43DDE6" ],
    ["#F67280", "#355C7D", "#6C5B7B", "#C06C84" ],
    ["#F3ECC8", "#0D1B4C", "#3F6699", "#78C2C3" ]
    ]

window = turtle.Screen()
window.screensize()
window.setup(width=1.0, height=1.0, startx=None, starty=None)

turtle.speed(0)
turtle.hideturtle()
turtle.tracer(0)
turtle.bgcolor('white')

def box(boxSize):
    turtle.begin_fill()     # 0 deg.
    turtle.forward(boxSize)
    turtle.left(90)         # 90 deg.
    turtle.forward(boxSize)
    turtle.left(90)         # 180 deg.
    turtle.forward(boxSize)
    turtle.left(90)         # 270 deg.
    turtle.forward(boxSize)
    turtle.end_fill()
    turtle.setheading(0)

def move_box(xy, length, color):
    (x, y) = xy
    turtle.color(color)
    turtle.penup()
    turtle.goto(x, y)
    turtle.pendown()
    box(length)

def draw_all(xy, length, depth, color_table):
    if depth <= 0: return

    length3 = length / 3
    (x, y) = xy

    pos1_9 = [  (x-length3*2,       y+length+length3),
                (x+length3,         y+length+length3),
                (x+length+length3,  y+length+length3),
                (x-length3*2,       y+length3),
                (x+length+length3,  y+length3),
                (x-length3*2,       y-length3*2),
                (x+length3,         y-length3*2),
                (x+length+length3,  y-length3*2) ]    
    for pos in pos1_9:
        move_box(pos, length3, color_table[depth%len(color_table)])
        draw_all(pos, length3, depth-1, color_table)
    
def Sierpinski():
    length = 270
    start_x = -length/2
    start_y = -length/2
    depth = 3

    for color_table in COLOR_TABLES:
        move_box((start_x, start_y), length, color_table[0])
        draw_all((start_x, start_y), length, depth, color_table)
        time.sleep(1)

#time.sleep(6)
Sierpinski()