Python的turtle库绘图-樱花动态飘落
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(o゜▽゜)o☆[BINGO!]
from turtle import *
from random import *
from math import *
def tree(n, l):
pd()
t = cos(radians(heading() + 45)) / 8 + 0.25
pencolor(t, t, t)
pensize(n / 3)
forward(l)
if n > 0:
b = random() * 15 + 10
c = random() * 15 + 10
d = l * (random() * 0.25 + 0.7)
right(b)
tree(n - 1, d)
left(b + c)
tree(n - 1, d)
right(c)
else:
right(90)
n = cos(radians(heading() - 45)) / 4 + 0.5
pencolor(n, n * 0.8, n * 0.8)
circle(3)
left(90)
if (random() > 0.7):
pu()
t = heading()
an = -40 + random() * 40
setheading(an)
dis = int(800 * random() * 0.5 + 400 * random() * 0.3 + 200 * random() * 0.2)
forward(dis)
setheading(t)
pd()
right(90)
n = cos(radians(heading() - 45)) / 4 + 0.5
pencolor(n * 0.5 + 0.5, 0.4 + n * 0.4, 0.4 + n * 0.4)
circle(2)
left(90)
pu()
t = heading()
setheading(an)
backward(dis)
setheading(t)
pu()
backward(l)
bgcolor(0.5, 0.5, 0.5)
ht()
speed(0)
tracer(0, 0)
pu()
backward(100)
left(90)
pu()
backward(300)
tree(12, 100)
done()
