每日分享
Always make a total effort, even when the odds are against you.
即使可能性很大，也要付出全部努力。
小闫语录：
大壮曾唱到：“在一瞬间，有一百万种可能。”即使有把握的一件事，结果仍是未知数，只有完成那一刻，才是定数。切莫轻视。
樱花树
先来看一下效果：
然后贴出源码：
import turtle import random from turtle import * from time import sleep t = turtle.Turtle() w = turtle.Screen() def tree(branchLen, t): if branchLen > 3: if 8 <= branchLen <= 12: if random.randint(0, 2) == 0: t.color('snow') else: t.color('lightcoral') t.pensize(branchLen / 3) elif branchLen < 8: if random.randint(0, 1) == 0: t.color('snow') else: t.color('lightcoral') t.pensize(branchLen / 2) else: t.color('sienna') t.pensize(branchLen / 10) t.forward(branchLen) a = 1.5 * random.random() t.right(20*a) b = 1.5 * random.random() tree(branchLen-10*b, t) t.left(40*a) tree(branchLen-10*b, t) t.right(20*a) t.up() t.backward(branchLen) t.down() def petal(m, t): # 树下花瓣 for i in range(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") t.circle(1) t.up() t.backward(a) t.right(90) t.backward(b) def main(): t = turtle.Turtle() myWin = turtle.Screen() getscreen().tracer(5, 0) turtle.screensize(bg='wheat') t.left(90) t.up() t.backward(150) t.down() t.color('sienna') tree(60, t) petal(100, t) myWin.exitonclick() main()
深沉的树
先来看一下效果：
然后贴出源码：
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 / 4) forward(l) if n > 0: b = random() * 15 + 10 c = random() * 15 + 10 d = 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 + 0.5 pencolor(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()
