python画树

importturtle as T
importrandom
importtime

#画樱花的躯干(60,t)
defTree(branch, t):
    time.sleep(0.0005)
    if branch > 3:
        if 8 <= branch <= 12:
            if random.randint(0, 2) ==0:
                t.color('snow')  #白
            else:
                t.color('lightcoral')  #淡珊瑚色
            t.pensize(branch / 3)
        elif branch < 8:
            if random.randint(0, 1) ==0:
                t.color('snow')
            else:
                t.color('lightcoral')  #淡珊瑚色
            t.pensize(branch / 2)
        else:
            t.color('sienna')  #赭(zhě)色
            t.pensize(branch / 10)  #6
t.forward(branch)
        a = 1.5 *random.random()
        t.right(20 *a)
        b = 1.5 *random.random()
        Tree(branch - 10 *b, t)
        t.left(40 *a)
        Tree(branch - 10 *b, t)
        t.right(20 *a)
        t.up()
        t.backward(branch)
        t.down()

#掉落的花瓣
defPetal(m, t):
    for i inrange(m):
        a = 200 - 400 *random.random()
        b = 10 - 20 *random.random()
        t.up()
        t.forward(b)
        t.left(90)
        t.forward(a)
        t.down()
        t.color('lightcoral')  #淡珊瑚色
        t.circle(1)
        t.up()
        t.backward(a)
        t.right(90)
        t.backward(b)

#绘图区域
t =T.Turtle()
#画布大小
w =T.Screen()
t.hideturtle()  #隐藏画笔
t.getscreen().tracer(5, 0)
w.screensize(bg='wheat')  #wheat小麦
t.left(90)
t.up()
t.backward(150)
t.down()
t.color('sienna')

#画樱花的躯干
Tree(60, t)
#掉落的花瓣
Petal(200, t)
w.exitonclick()

from turtle import *
from random import *
from math import *

deftree(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turtle
speed(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300
tree(12,100)#递归7层
done()

from turtle import *
from random import *
from math import *

deftree(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()