3d圣诞树python

以下是一个使用Python绘制3D圣诞树的示例代码：

import turtle

def draw_tree(t, length, level):
    if level == 0:
        t.forward(length)
        t.backward(length)
        return
    t.forward(length)
    t.left(45)
    draw_tree(t, length/2, level-1)
    t.right(90)
    draw_tree(t, length/2, level-1)
    t.left(45)
    t.backward(length)

def draw_star(t, size):
    for _ in range(5):
        t.forward(size)
        t.right(144)

def draw_hat(t, size):
    t.color("red")
    t.begin_fill()
    t.forward(size)
    t.left(120)
    t.forward(size*2)
    t.left(120)
    t.forward(size*2)
    t.left(120)
    t.forward(size)
    t.end_fill()

def draw_christmas_tree():
    screen = turtle.Screen()
    screen.bgcolor("black")

    tree = turtle.Turtle()
    tree.color("green")
    tree.speed(0)
    tree.penup()
    tree.goto(0, -200)
    tree.pendown()

    draw_tree(tree, 200, 4)

    star = turtle.Turtle()
    star.color("yellow")
    star.speed(0)
    star.penup()
    star.goto(-20, 150)
    star.pendown()

    draw_star(star, 50)

    hat = turtle.Turtle()
    hat.penup()
    hat.goto(-50, 100)
    hat.pendown()

    draw_hat(hat, 100)

    turtle.done()

draw_christmas_tree()

这段代码使用了Python的turtle库来绘制3D圣诞树。首先定义了一个`draw_tree`函数来绘制树的主干和分支，然后定义了`draw_star`函数来绘制星星，最后定义了`draw_hat`函数来绘制圣诞帽。在`draw_christmas_tree`函数中，创建了一个画布和三个海龟对象，分别用来绘制树、星星和圣诞帽。调用这个函数即可生成一个3D圣诞树。