求问怎样用python/python turtle画“心”呢？

程序员文章站 2022-03-15 15:55:44

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刚刚起步python，觉得python turtle真是萌神一般的存在呀～试着画了颗“心”，不过觉得方法实在是太笨了>

回复内容：

from turtle import *
def curvemove():
    for i in range(200):
        right(1)
        forward(1)
color('red','pink')        
begin_fill()
left(140)
forward(111.65)
curvemove()
left(120)
curvemove()
forward(111.65)
end_fill()
done()

from turtle import *
pensize(1)
color('black','red')
speed(2)
up()
goto(-12,100)
down()
begin_fill()
left(90)
circle(120,180)
circle(360,70.529)
left(38.942)
circle(360,70.529)
circle(120,180)
end_fill()
up()
goto(-250,-150)
down()

from pylab import*
t=linspace(0,2*pi,100)
x=sin(2*t) + 2*sin(t)
y=-cos(2*t)-2*cos(t)
fill(x,y,'r')
show()

心没画，玫瑰花倒是有一个

之前忘了帖代码，现在补上。
for i in range (1):
def paint(ang,r,ang2): #画图函数
turtle.penup()
turtle.setheading(ang)
turtle.pendown()
turtle.circle(r,ang2)

import turtle
turtle.speed(9)
turtle.color("white") #设置
turtle.pensize(7)
turtle.penup()
turtle.goto(50,-50)
turtle.pendown()
turtle.dot(200,"pink") #画背景
turtle.penup()
turtle.goto(50,86.6)
ang=-150
r=300
ang2=46
for j in range (21): #循环

paint(ang,r,ang2) #画弧
ang2-=25
paint(ang+ang2+25,r,-ang2) #回退
ang2+=25
ang+=66
r=r*0.9

思路大概就是：画圆弧，回退大约1/3，转向，减小半径，画圆弧......一直循环...

视频传送门Python玫瑰花_生活

提醒我贴代码的那个小同学，我看了你资料，看来你和我一个学校而且选的同一个选修课呢。不过我这个作业交过了，所以你参考一下，不懂的可以问我。
照抄的话老师会打你屁屁的
(╯‵□′)╯︵┻━┻。35道哪个不会可以私信我。我给你思路~不过最近考试周，我不一定都能帮得上忙。。。
--------------15.12.31-----------------

import sys
import math 

def frange(start, end, step=1.0):
	if step > 0:
		while start  end:
			yield start 
			start += step
	elif step  0:
		while start > end:
			yield start 
			start += step
	else:
		raise ValueError('range() step must not be zero')

def f(x, y, z):
	a = x*x + 9.0/4*y*y + z*z - 1 
	return a*a*a - x*x*z*z*z - 9.0/80*y*y*z*z*z 

def h(x, z):
	for y in frange(1.0, 0.0, -0.001):
		if f(x, y, z)  0:
			return y 
	return 0.0

if __name__ == '__main__':
	for z in frange(1.5, -1.5, -0.1):
		for x in frange(-1.5, 1.5, 0.05):
			v = f(x, 0, z)
			if v  0:
				y0 = h(x, z)
				ny = 0.01
				nx = h(x + ny, z) - y0 
                                nz = h(x, z + ny) - y0 
				nd = 1.0/math.sqrt(nx*nx+ny*ny+nz*nz)
				d = (nx + ny - nz)*nd*0.5 + 0.5
				sys.stdout.write('.:-=+*#%@'[int(d*5)])
			else:
				sys.stdout.write(' ')
		sys.stdout.write('\n')

用python matplotlib画笛卡尔的心形线

import numpy as np
import pylab as plt
from matplotlib import colors

a = [[] for i in range(1000)]

i = 0
while i j = 0
while j x = -1.8 + 0.003*i
y = -1.4 + 0.0028*j
z = y**2 + (-x - (y**2)**0.33333)**2
if z a[i].append(0.9)
else:
a[i].append(0.0)
j = j + 1
i = i + 1

cmap = colors.ListedColormap(['white', 'pink'])

im = plt.imshow(a, cmap = cmap, interpolation="bicubic" )
plt.show()