动态生成樱花

from turtle import *from random import *from math import *def tree(n,l):pd()#下笔#阴影效果t = cos(radians(heading()+45))/8+0.25pencolor(t,t,t)pensize(n/3)forward(l)#画树枝if n>0:b = random()*15+10 #右分支偏转角度c = random()*15+10 #左分支偏转角度d = l*(random()*0.25+0.7) #下一个分支的长度#右转一定角度,画右分支right(b)tree(n-1,d)#左转一定角度，画左分支left(b+c)tree(n-1,d)#转回来right(c)else:#画叶子right(90)n=cos(radians(heading()-45))/4+0.5pencolor(n,n*0.8,n*0.8)circle(3)left(90)#添加0.3倍的飘落叶子if(random()>0.7):pu()#飘落t = heading()an = -40 +random()*40setheading(an)dis = int(800*random()*0.5 + 400*random()*0.3 + 200*random()*0.2)forward(dis)setheading(t)#画叶子pd()right(90)n = cos(radians(heading()-45))/4+0.5pencolor(n*0.5+0.5,0.4+n*0.4,0.4+n*0.4)circle(2)left(90)pu()#返回t=heading()setheading(an)backward(dis)setheading(t)pu()backward(l)#退回bgcolor(0.5,0.5,0.5)#背景色ht()#隐藏turtlespeed(0)#速度 1-10渐进，0 最快tracer(0,0)pu()#抬笔backward(100)left(90)#左转90度pu()#抬笔backward(300)#后退300tree(12,100)#递归7层done()

樱花飘落效果

from turtle import *from random import *from math import *def tree(n,l):pd()#下笔#阴影效果t = cos(radians(heading()+45))/8+0.25pencolor(t,t,t)pensize(n/3)forward(l)#画树枝if n>0:b = random()*15+10 #右分支偏转角度c = random()*15+10 #左分支偏转角度d = l*(random()*0.25+0.7) #下一个分支的长度#右转一定角度,画右分支right(b)tree(n-1,d)#左转一定角度，画左分支left(b+c)tree(n-1,d)#转回来right(c)else:#画叶子right(90)n=cos(radians(heading()-45))/4+0.5pencolor(n,n*0.8,n*0.8)circle(3)left(90)#添加0.3倍的飘落叶子if(random()>0.7):pu()#飘落t = heading()an = -40 +random()*40setheading(an)dis = int(800*random()*0.5 + 400*random()*0.3 + 200*random()*0.2)forward(dis)setheading(t)#画叶子pd()right(90)n = cos(radians(heading()-45))/4+0.5pencolor(n*0.5+0.5,0.4+n*0.4,0.4+n*0.4)circle(2)left(90)pu()#返回t=heading()setheading(an)backward(dis)setheading(t)pu()backward(l)#退回bgcolor(0.5,0.5,0.5)#背景色ht()#隐藏turtlespeed(0)#速度 1-10渐进，0 最快tracer(0,0)pu()#抬笔backward(100)left(90)#左转90度pu()#抬笔backward(300)#后退300tree(12,100)#递归7层done()

暗色效果樱花

from turtle import *from random import *from math import *def tree(n, l):pd()t = cos(radians(heading() + 45)) / 8 + 0.25pencolor(t, t, t)pensize(n / 4)forward(l)if n > 0:b = random() * 15 + 10c = random() * 15 + 10d = l * (random() * 0.35 + 0.6)right(b)tree(n - 1, d)left(b + c)tree(n - 1, d)right(c)else:right(90)n = cos(radians(heading() - 45)) / 4 + 0.5pencolor(n, n, n)circle(2)left(90)pu()backward(l)bgcolor(0.5, 0.5, 0.5)ht()speed(0)tracer(0, 0)left(90)pu()backward(300)tree(13, 100)done()