python程序编写爱心——turtle库的使用

亦凉 2021-07-26 18:07 781阅读 1赞

## python程序编写爱心——turtle库的使用 ##

**话不多说，直接上代码！**

import turtle
    import time
    
    # 清屏函数
    def clear_all():
        turtle.penup()
        turtle.goto(0, 0)
        turtle.color('white')
        turtle.pensize(800)
        turtle.pendown()
        turtle.setheading(0)
        turtle.fd(300)
        turtle.bk(600)
    
    # 重定位海龟的位置
    def go_to(x, y, state):
        turtle.pendown() if state else turtle.penup()
        turtle.goto(x, y)
    
    # 画线
    # state为真时海龟回到原点，为假时不回到原来的出发点
    def draw_line(length, angle, state):
        turtle.pensize(1)
        turtle.pendown()
        turtle.setheading(angle)
        turtle.fd(length)
        turtle.bk(length) if state else turtle.penup()
        turtle.penup()
    
    # 画箭羽
    def draw_feather(size):
        angle = 30  # 箭的倾角
        feather_num = size // 6  # 羽毛的数量
        feather_length = size // 3  # 羽毛的长度
        feather_gap = size // 10  # 羽毛的间隔
        for i in range(feather_num):
            draw_line(feather_gap, angle + 180, False)  # 箭柄，不折返
            draw_line(feather_length, angle + 145, True)  # 羽翼，要折返
        draw_line(feather_length, angle + 145, False)
        draw_line(feather_num * feather_gap, angle, False)
        draw_line(feather_length, angle + 145 + 180, False)
        for i in range(feather_num):
            draw_line(feather_gap, angle + 180, False)  # 箭柄，不折返
            draw_line(feather_length, angle - 145, True)  # 羽翼，要折返
        draw_line(feather_length, angle - 145, False)
        draw_line(feather_num * feather_gap, angle, False)
        draw_line(feather_length, angle - 145 + 180, False)
    
    # 画爱心
    def draw_heart(size):
        turtle.color('red', 'pink')
        turtle.pensize(2)
        turtle.pendown()
        turtle.setheading(150)
        turtle.begin_fill()
        turtle.fd(size)
        turtle.circle(size * -3.745, 45)
        turtle.circle(size * -1.431, 165)
        turtle.left(120)
        turtle.circle(size * -1.431, 165)
        turtle.circle(size * -3.745, 45)
        turtle.fd(size)
        turtle.end_fill()
    
    # 画箭
    def draw_arrow(size):
        angle = 30
        turtle.color('black')
        draw_feather(size)
        turtle.pensize(4)
        turtle.setheading(angle)
        turtle.pendown()
        turtle.fd(size * 2)
    
    # 一箭穿心
    # 箭的头没有画出来，而是用海龟来代替
    def arrow_heart(x, y, size):
        go_to(x, y, False)
        draw_heart(size * 1.15)
        turtle.setheading(-150)
        turtle.penup()
        turtle.fd(size * 2.2)
        draw_heart(size)
        turtle.penup()
        turtle.setheading(150)
        turtle.fd(size * 2.2)
        draw_arrow(size)
    
    # 画出发射爱心的小人
    def draw_people(x, y):
        turtle.penup()
        turtle.goto(x, y)
        turtle.pendown()
        turtle.pensize(2)
        turtle.color('black')
        turtle.setheading(0)
        turtle.circle(60, 360)
        turtle.penup()
        turtle.setheading(90)
        turtle.fd(75)
        turtle.setheading(180)
        turtle.fd(20)
        turtle.pensize(4)
        turtle.pendown()
        turtle.circle(2, 360)
        turtle.setheading(0)
        turtle.penup()
        turtle.fd(40)
        turtle.pensize(4)
        turtle.pendown()
        turtle.circle(-2, 360)
        turtle.penup()
        turtle.goto(x, y)
        turtle.setheading(-90)
        turtle.pendown()
        turtle.fd(20)
        turtle.setheading(0)
        turtle.fd(35)
        turtle.setheading(60)
        turtle.fd(10)
        turtle.penup()
        turtle.goto(x, y)
        turtle.setheading(-90)
        turtle.pendown()
        turtle.fd(40)
        turtle.setheading(0)
        turtle.fd(35)
        turtle.setheading(-60)
        turtle.fd(10)
        turtle.penup()
        turtle.goto(x, y)
        turtle.setheading(-90)
        turtle.pendown()
        turtle.fd(60)
        turtle.setheading(-135)
        turtle.fd(60)
        turtle.bk(60)
        turtle.setheading(-45)
        turtle.fd(30)
        turtle.setheading(-135)
        turtle.fd(35)
        turtle.penup()
    
    # 第一个画面，显示文字
    def page0():
        turtle.penup()
        turtle.goto(-350, 0)
        turtle.color('black')
        turtle.write('开启我们的浪漫之旅', font=('宋体', 60, 'normal'))
        time.sleep(3)
    
    # 第二个画面，显示发射爱心的小人
    def page1():
        turtle.speed(10)
        draw_people(-250, 20)
        turtle.penup()
        turtle.goto(-150, -30)
        draw_heart(14)
        turtle.penup()
        turtle.goto(-20, -60)
        draw_heart(25)
        turtle.penup()
        turtle.goto(250, -100)
        draw_heart(45)
        turtle.hideturtle()
        time.sleep(3)
    
    # 最后一个画面，一箭穿心
    def page2():
        turtle.speed(1)
        turtle.penup()
        turtle.goto(-200, -200)
        turtle.color('blue')
        turtle.pendown()
        turtle.write('建雷 俐娴', font=('wisdom', 50, 'normal'))
        turtle.penup()
        turtle.goto(0, -180)
        draw_heart(10)
        arrow_heart(20, -60, 51)
        turtle.showturtle()
    
    def main():
        turtle.setup(900, 500)
        page0()
        clear_all()
        page1()
        clear_all()
        page2()
        turtle.done()
    
    main()

**运行结果：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d1b3h1eWluZw_size_16_color_FFFFFF_t_70_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d1b3h1eWluZw_size_16_color_FFFFFF_t_70_pic_center]: /images/20210726/5f1204feb07040ebb104a4b721f480be.png