如何用python畫一朵花？

01-23

如題。

本王畫的彩虹花呦(????ω????)

快喊本寶寶大王就解鎖代碼呦寶寶破百贊(≧▽≦)/啦

from mpl_toolkits.mplot3d import Axes3D from matplotlib import cm from matplotlib.ticker import LinearLocator import matplotlib.pyplot as plt import numpy as np # 很多寶寶要我注釋代碼，額其實這個很簡單的，主要是要有numpy和matplotlib # 剩餘的就是數學公式了 fig = plt.figure() ax = fig.gca(projection="3d") # ax.set_aspect("equal") # ax.set_axis_off() [x, t] = np.meshgrid(np.array(range(25))/24.0, np.arange(0, 575.5, 0.5)/575*17*np.pi-2*np.pi) p = (np.pi/2)*np.exp(-t/(8*np.pi)) u = 1-(1-np.mod(3.6*t, 2*np.pi)/np.pi)**4/2 y = 2*(x**2-x)**2*np.sin(p) r = u*(x*np.sin(p)+y*np.cos(p))

surf = ax.plot_surface(r*np.cos(t), r*np.sin(t), u*(x*np.cos(p)-y*np.sin(p)), rstride=1, cstride=1, cmap=cm.gist_rainbow_r, linewidth=0, antialiased=True) plt.show()

_(?_?」∠)_我是寂寞的分割線

我發覺我放碼就是個錯誤，你們都拿完就走了，一群娃娃都拿去撩妹撩漢子，卻沒有一個人撩我

感動啊，F大居然看了我的彩虹花，在此感謝F大的花

福利時間到，恩，對，本寶寶就是這麼懶，不肯把它轉成python，下面是MATLAB的代碼

至於作用嘛，嘿嘿嘿，據說是世界上最（wo）完（xia）美（bian）的胸哦

[X, Y] = meshgrid(0.01:0.01:1, 0.01:0.01:1); Zfun_yuru =@(x,y)12.5*x.*log10(x).*y.*(y-1)+exp(-((25 ... *x - 25/exp(1)).^2+(25*y-25/2).^2).^3)./25; Z = Zfun_yuru(X,Y); figure; surf(Y,Z,X,"FaceColor",[1 0.75 0.65],"linestyle","none"); hold on surf(Y+0.98,Z,X,"FaceColor",[1 0.75 0.65],"linestyle","none"); axis equal; view([116 30]); camlight; lighting phong; % 設置光照和光照模式

在《Think Python》中有一個畫花的例子（http://www.greenteapress.com/thinkpython/code/flower.py），它的效果是一筆一划給你花出三朵花，效果如下：

我精簡下代碼：

import math


try:

    from swampy.TurtleWorld import *  # 需要執行 pip install Swampy

except ImportError:

    from TurtleWorld import *
def polyline(t, n, length, angle):

    for i in range(n):

        fd(t, length)

        lt(t, angle)
def arc(t, r, angle):

    arc_length = 2 * math.pi * r * abs(angle) / 360

    n = int(arc_length / 4) + 1

    step_length = arc_length / n

    step_angle = float(angle) / n
    # making a slight left turn before starting reduces

    # the error caused by the linear approximation of the arc

    lt(t, step_angle/2)

    polyline(t, n, step_length, step_angle)

    rt(t, step_angle/2)
def petal(t, r, angle):

    for i in range(2):

        arc(t, r, angle)

        lt(t, 180-angle)
def flower(t, n, r, angle):

    for i in range(n):

        petal(t, r, angle)

        lt(t, 360.0/n)
def move(t, length):

    pu(t)

    fd(t, length)

    pd(t)
world = TurtleWorld()

bob = Turtle()

bob.delay = 0.01
move(bob, -100)

flower(bob, 7, 60.0, 60.0)
move(bob, 100)

flower(bob, 10, 40.0, 80.0)
move(bob, 100)

flower(bob, 20, 140.0, 20.0)
die(bob)
world.canvas.dump()

wait_for_user()

用python 畫一朵跟上面那樣明媚的太陽花：

#!/usr/bin/python

import Image chars = " ...,,,DSAH2KJHSDIO 2USDFKJKLEJKCG^^$%#!*(!#JHASKHDFJASHQIWSNFJASCBJ " fn = r"D:mycodePythonflower.png" f1 = lambda F: "".join([(k % 100 != 0) and m or m+" " for k, m in enumerate(apply(lambda x:[chars[x[j, i] % len(chars)] for i in xrange(80) for j in xrange(100)], (Image.open(F).resize((100, 80)).convert("L").load(),)), 1)]) f = open(r"D:mycodePythonflower.txt", "w") f.write(f1(fn)) f.close()

效果截圖：

字元畫也是畫~！

來，太陽花

from turtle import * shape("turtle") color("red", "yellow") begin_fill() while True: forward(200) left(170) if abs(pos()) &< 1: break end_fill() done()

肯定是用分形啦，先佔個坑，有時間了就來畫分形花

安利下這本書，可以參考下

https://book.douban.com/subject/3117569/#!/i!/ckDefault

。

誰知道手機上插鏈接怎麼變文字啊

(ノ｀⊿′)ノ

借用的 @一隻聰明的傻瓜的程序，自己稍作了修改。效果如下

需要程序的，去github地址下載

原本想畫一朵花的，最後咋感覺畫出了一個輪子？？？

import turtle

turtle.speed(10)

def draw(n):

for i in range(5):

turtle.forward(80)

turtle.left(n)

for i in range(1500):

draw(36*(i+1.0016))

我就默默的仰望你們這幫大神丟代碼，不說話........

本寶用Python畫
的花,會動的~~

http://chaos.ac.cn:8000/

源碼:

https://github.com/gamijin0/Beauty