python圣诞雪人

一、前言

为了庆祝我们副山羊勒布朗詹姆斯，连续刷分6场30+，特此画一幅圣诞雪人，也祝福湖人12月26日圣诞大战，再我詹的带领下，刷分60+，圣诞之夜历史第一人。

二、创意名

Lebron James It’s for you！

三、效果展示

四、实现步骤

1. 创建画布，设置背景，图片，设置雪球参数，风参数
2. 创建画布中所有圆形对象
3. 创建雪球
4. 创建雪球移动函数
5. 创建雪人
6. 创建地面

五、编码实现

创建画布，设置背景，图片，设置雪球参数，风参数

import turtle
import random
import time

width = height = 500

window = turtle.Screen()
window.setup(width, height)
window.bgcolor("sky blue")
window.bgpic('jm.gif')
window.title("Happy Holidays")

snowball_rate = 1, 3
snowball_size = 5, 15
wind_change = 1, 5
max_wind = 3

turtle.bgpic函数只接受gif格式的图片

创建画布中所有圆形对象

def make_circle(turtle_name, x, y, size, colour):
    turtle_name.color(colour)
    turtle_name.penup()
    turtle_name.setposition(x, y)
    turtle_name.dot(size)

创建雪球

list_of_snowballs = []
def make_snowball():
    snowball = turtle.Turtle()
    snowball.color("white")
    snowball.penup()
    snowball.setposition(random.randint(-2*width, width/2), height/2)
    snowball.hideturtle()
    snowball.size = random.randint(*snowball_size)
    list_of_snowballs.append(snowball)

创建雪球移动函数

def move_snowball(turtle_name, falling_speed=1, wind=0):
    turtle_name.clear()
    turtle_name.sety(turtle_name.ycor() - falling_speed)
    if wind:
        turtle_name.setx(turtle_name.xcor() + wind)
    turtle_name.dot(turtle_name.size)

创建雪人

# 雪人：身体
snowman = turtle.Turtle()
x_position = 100
y_positions = 75, 0, -100
size = 75
for y in y_positions:
    make_circle(snowman, x_position, y, size, "white")
    size = size *1.5

# 雪人：按钮
button_seperation = 25
button_y_positions = [y_positions[1]-button_seperation,
                      y_positions[1],
                      y_positions[1]+button_seperation]
for y in button_y_positions:
    make_circle(snowman, x_position, y, 10, "black")

# 雪人：眼睛
y_offset = 10
x_seperation = 15
for x in x_position-x_seperation, x_position+x_seperation:
    make_circle(snowman, x, y_positions[0] + y_offset, 20, "green")
    make_circle(snowman, x, y_positions[0] + y_offset, 10, "black")

# 雪人：鼻子
snowman.color("orange")
snowman.setposition(x_position - 10, y_positions[0]-y_offset)
snowman.shape("triangle")
snowman.setheading(200)
snowman.turtlesize(0.5, 2.5)

window.tracer(0)

创建地面

grass = turtle.Turtle()
grass.fillcolor("forest green")
grass.penup()
grass.setposition(-width/2, -height/2)
grass.begin_fill()
for _ in range(2):
    grass.forward(width)
    grass.left(90)
    grass.forward(70)
    grass.left(90)
grass.end_fill()

ground = turtle.Turtle()
for x in range(int(-width/2), int(width/2), int(width/200)):
    make_circle(ground, x, -180, random.randint(5, 20), "white")

给画布添加文字

text = turtle.Turtle()
text.color("red")
text.penup()
text.setposition(-100,170)
text.write("Happy Holidays", font=("Apple Chancery", 30, "bold"), align="center")
text.setposition(130, 140)
text.color("dark green")
text.write("Lebron", font=("Avenir", 30, "normal"), align="right")
text.color("black")
text.write("James", font=("Avenir", 30, "normal"), align="left")
text.setx(50)
text.write("It's for you！", font=("Apple Chancery", 20, "bold"), align="right")
text.hideturtle()

定义画布的时间函数

time_delay = 0
start_time = time.time()
wind = 0
wind_delay = 5
wind_timer = time.time()
wind_step = 0.1
while True:
    if time.time() - start_time > time_delay:
        make_snowball()
        start_time = time.time()
        time_delay = random.randint(*snowball_rate)/10

    for snowball in list_of_snowballs:
        move_snowball(snowball, wind=wind)
        if snowball.ycor() < -height/2:
            snowball.clear()
            list_of_snowballs.remove(snowball)

    if time.time() - wind_timer > wind_delay:
        wind += wind_step
        if wind >= max_wind:
            wind_step = -wind_step
        elif wind <= 0:
            wind_step = abs(wind_step)

        wind_timer = time.time()
        wind_delay = random.randint(*wind_change)/10


    window.update()

turtle.done()