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Grafika:Dragon curve.png - Wikipedia, wolna encyklopedia

Grafika:Dragon curve.png

Z Wikipedii

[edit] Beschreibung

Description

Spacefilling combination of four dragon curves

Created with Python and xturtle graphics module

Source

own work

Date

5. 11. 2006

Author

Stefan Lew

Permission

This image is public domain. You may use this image for any purpose, including commercial.

[edit] Source code

#
# Dragon curve
#

from xturtle import *

def fold(direction):
        if direction == 0:
                p.right(90)
        else:
                p.left(90)

def next(kette):
        kette.append(1)
        laenge = len(kette)
        for i in range(0, laenge-1):
                kette.append(kette[i])
        if kette[laenge-1+laenge/2] == 0:
                kette[laenge-1+laenge/2] = 1;
        else:
                kette[laenge-1+laenge/2] = 0;
        return kette

def zeichne(kette):
        p.tracer(100)
        p.hideturtle()
        for i in kette:
                p.forward(2)
                fold(i)
        p.forward(2)
        p.update()

def find_iteration(n):
        kette = [1]
        for i in range(1, n):
                kette = next(kette)
        return kette

def set_back():
        p.penup()
        p.goto(0,0)
        p.pendown()


it = 15

p = Pen()
zeichne(find_iteration(it))
set_back()
p.color('red')
zeichne(find_iteration(it))
set_back()
p.color('blue')
zeichne(find_iteration(it))
set_back()
p.color('green')
zeichne(find_iteration(it))
raw_input()

[edit] Licensing

Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.


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