分形图

以下代码由PHP站长网 52php.cn收集自互联网

现在PHP站长网小编把它分享给大家，仅供参考

#!/usr/bin/env python3
"""      turtle-example-suite:

        tdemo_bytedesign.py

An example adapted from the example-suite
of PythonCard's turtle graphics.

It's based on an article in BYTE magazine
Problem Solving with Logo: Using Turtle
Graphics to Redraw a Design
November 1982,p. 118 - 134

-------------------------------------------

Due to the statement

t.delay(0)

in line 152,which sets the animation delay
to 0,this animation runs in "line per line"
mode as fast as possible.
"""

import math
from turtle import Turtle,mainloop
from time import clock

# wrapper for any additional drawing routines
# that need to know about each other
class Designer(Turtle):

    def design(self,homePos,scale):
        self.up()
        for i in range(5):
            self.forward(64.65 * scale)
            self.down()
            self.wheel(self.position(),scale)
            self.up()
            self.backward(64.65 * scale)
            self.right(72)
        self.up()
        self.goto(homePos)
        self.right(36)
        self.forward(24.5 * scale)
        self.right(198)
        self.down()
        self.centerpiece(46 * scale,143.4,scale)
        self.getscreen().tracer(True)

    def wheel(self,initpos,scale):
        self.right(54)
        for i in range(4):
            self.pentpiece(initpos,scale)
        self.down()
        self.left(36)
        for i in range(5):
            self.tripiece(initpos,scale)
        self.left(36)
        for i in range(5):
            self.down()
            self.right(72)
            self.forward(28 * scale)
            self.up()
            self.backward(28 * scale)
        self.left(54)
        self.getscreen().update()

    def tripiece(self,scale):
        oldh = self.heading()
        self.down()
        self.backward(2.5 * scale)
        self.tripolyr(31.5 * scale,scale)
        self.up()
        self.goto(initpos)
        self.setheading(oldh)
        self.down()
        self.backward(2.5 * scale)
        self.tripolyl(31.5 * scale,scale)
        self.up()
        self.goto(initpos)
        self.setheading(oldh)
        self.left(72)
        self.getscreen().update()

    def pentpiece(self,scale):
        oldh = self.heading()
        self.up()
        self.forward(29 * scale)
        self.down()
        for i in range(5):
            self.forward(18 * scale)
            self.right(72)
        self.pentr(18 * scale,75,scale)
        self.up()
        self.goto(initpos)
        self.setheading(oldh)
        self.forward(29 * scale)
        self.down()
        for i in range(5):
            self.forward(18 * scale)
            self.right(72)
        self.pentl(18 * scale,scale)
        self.up()
        self.goto(initpos)
        self.setheading(oldh)
        self.left(72)
        self.getscreen().update()

    def pentl(self,side,ang,scale):
        if side < (2 * scale): return
        self.forward(side)
        self.left(ang)
        self.pentl(side - (.38 * scale),scale)

    def pentr(self,scale):
        if side < (2 * scale): return
        self.forward(side)
        self.right(ang)
        self.pentr(side - (.38 * scale),scale)

    def tripolyr(self,scale):
        if side < (4 * scale): return
        self.forward(side)
        self.right(111)
        self.forward(side / 1.78)
        self.right(111)
        self.forward(side / 1.3)
        self.right(146)
        self.tripolyr(side * .75,scale)

    def tripolyl(self,scale):
        if side < (4 * scale): return
        self.forward(side)
        self.left(111)
        self.forward(side / 1.78)
        self.left(111)
        self.forward(side / 1.3)
        self.left(146)
        self.tripolyl(side * .75,scale)

    def centerpiece(self,s,a,scale):
        self.forward(s); self.left(a)
        if s < (7.5 * scale):
            return
        self.centerpiece(s - (1.2 * scale),scale)

def main():
    t = Designer()
    t.speed(0)
    t.hideturtle()
    t.getscreen().delay(0)
    t.getscreen().tracer(0)
    at = clock()
    t.design(t.position(),2)
    et = clock()
    return "runtime: %.2f sec." % (et-at)

if __name__ == '__main__':
    msg = main()
    print(msg)
    mainloop()

以上内容由PHP站长网【52php.cn】收集整理供大家参考研究

如果以上内容对您有帮助，欢迎收藏、点赞、推荐、分享。

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!