圣诞节教你用Python绘制爱心圣诞树

# -*- coding: utf-8 -*-
"""
Created on Sat Dec 12 12:29:09 2020

@author: haoyu
"""

import turtle as t
import random
# 爱心函数
# 将爱心分为两个半圆与一个正方形
# r为半圆半径，l = 2r为正方形边长
# 调整半径即可调整爱心大小
def loving_heart(r):
    l = 2 * r
    t.left(45)
    t.forward(l)
    t.circle(r, 180)
    t.right(90)
    t.circle(r, 180)
    t.forward(l)

# 树函数(递归)
def tree(d, s):
    if d <= 0:
        return
    t.forward(s)
    tree(d - 1, s * .8)
    t.right(120)
    tree(d - 3, s * .5)
    t.right(120)
    tree(d - 3, s * .5)
    t.right(120)
    t.backward(s) #回退函数
     
#画爱心部分
t.penup()
t.goto(0,200) #设置起点位置
t.pendown()
t.pencolor('pink') #设置画笔颜色
t.color('pink') 
t.begin_fill() #对图形进行填充
loving_heart(20) #执行画爱心函数
t.end_fill()

#画树部分
n = 100
t.speed('fastest')
#t.Turtle().screen.delay(0)
t.right(225)
t.color("dark green")
t.backward(n * 4.8)
tree(15, n)
t.backward(n / 5)

#绘制落叶
for i in range(200):
    a = 200 - 400 * random.random()
    b = 10 - 20 * random.random()
    t.up()
    t.forward(b)
    t.left(90)
    t.forward(a)
    t.down()
    if random.randint(0, 1) == 0:
        t.color('tomato')
    else:
        t.color('wheat')
    t.circle(2)
    t.up()
    t.backward(a)
    t.right(90)
    t.backward(b)
t.hideturtle() 

height = 5

stars = 1

for i in range(height):

    print((' ' * (height - i)) + ('*' * stars))

    stars += 2

print((' ' * height) + '|')

 import turtle

 screen = turtle.Screen()

 screen.setup(800,600)

 circle = turtle.Turtle()

 circle.shape('circle')

 circle.color('red')

 circle.speed('fastest')

 circle.up()

 square = turtle.Turtle()

square.shape('square')

square.color('green')

square.speed('fastest')

square.up()

circle.goto(0,280)

circle.stamp()

k = 0

for i in range(1, 17):

    y = 30*i

   for j in range(i-k):

       x = 30*j

      square.goto(x,-y+280)

       square.stamp()

      square.goto(-x,-y+280)

       square.stamp()

   if i % 4 == 0:

      x = 30*(j+1)

      circle.color('red')

      circle.goto(-x,-y+280)

        circle.stamp()

        circle.goto(x,-y+280)

       circle.stamp()

       k += 2

    if i % 4 == 3:

        x = 30*(j+1)

       circle.color('yellow')

        circle.goto(-x,-y+280)

      circle.stamp()

       circle.goto(x,-y+280)

       circle.stamp()

square.color('brown')

for i in range(17,20):

    y = 30*i

   for j in range(3):

       x = 30*j

        square.goto(x,-y+280)

       square.stamp()

        square.goto(-x,-y+280)

        square.stamp()

turtle.exitonclick()