海龟绘图：大家一起来登场！

    导语：独乐乐不如众乐乐。——《孟子·梁惠王下》

    课前看到其它班级同学的作品被选登出来，他们也开始努力开动大脑，运用学会的知识进行创作，希望被选上并发布。

    瞧，在短短的课堂时间里，他们的创作潜力在作品中展现出来，都有哪些孩子的作品呢？

2020级5班张宇辰的作品

代码：

import turtle

turtle.speed(0)

turtle.pensize('40')

turtle.up()

turtle.pencolor('red')

turtle.goto(-300,110)

turtle.down()

turtle.forward(130)

turtle.up()

turtle.goto(-300,50)

turtle.down()

turtle.pencolor('blue')

turtle.forward(130)

turtle.goto(-300,50)

turtle.right(90)

turtle.forward(130)

turtle.up()

turtle.goto(-120,110)

turtle.down()

turtle.forward(190)

turtle.up()

turtle.goto(-40,110)

turtle.down()

turtle.forward(190)

turtle.left(90)

turtle.forward(110)

turtle.left(70)

turtle.forward(200)

turtle.right(140)

turtle.forward(200)

turtle.right(110)

turtle.forward(80)

2020级5班周金麟的作品

代码：

import turtle

turtle.bgcolor('blue')

turtle.pencolor('red')

turtle.pensize(2)

turtle.speed(0)

turtle.up()

turtle.goto(0,-150)

turtle.down()

turtle.circle(240)

turtle.up()

turtle.goto(100,100)

turtle.down()

turtle.fillcolor('red')

turtle.begin_fill()

turtle.circle(50)

turtle.end_fill()

turtle.up()

turtle.goto(-100,100)

turtle.down()

turtle.fillcolor('red')

turtle.begin_fill()

turtle.circle(50)

turtle.end_fill()

turtle.up()

turtle.goto(-120,10)

turtle.down()

turtle.right(90)

turtle.circle(110,180)

turtle.hideturtle()

2020级5班姜驰的作品

2020级5班徐陆然的作品

代码：

import turtle

turtle. pendown

turtle.pensize(5)

turtle.pencolor('green')

for i in range(4):

    turtle.left(225)

    turtle.forward(150)

    turtle.right(90)

    turtle.circle(-100,50)

    turtle.goto(0,0)

    turtle.done

2020级2班彭耀仁的作品

代码：

import turtle

turtle.bgcolor('red')

turtle.pensize(5)

turtle.begin_fill()

turtle.color('pink')

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.fillcolor('black')

turtle.end_fill()

turtle.pensize(5)

turtle.begin_fill()

turtle.color('pink')

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.fillcolor('black')

turtle.end_fill()

turtle.pensize(5)

turtle.begin_fill()

turtle.color('pink')

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.fillcolor('black')

turtle.end_fill()

turtle.pensize(5)

turtle.begin_fill()

turtle.color('pink')

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.left(100)

turtle.circle(400,20)

turtle.fillcolor('black')

turtle.end_fill()

turtle.left(290)

turtle.forward(500)

2020级2班谢宇锋的作品

代码：

import turtle

turtle.screensize(800,600,'blue')

turtle.up()

turtle.goto(0,-300)

turtle.down()

turtle.pensize(5)

turtle.circle(300)

turtle.up()

turtle.goto(-160,250)

turtle.down()

turtle.forward(320)

turtle.right(45)

turtle.forward(120)

turtle.right(45)

turtle.forward(330)

turtle.right(45)

turtle.forward(120)

turtle.right(45)

turtle.forward(320)

turtle.right(45)

turtle.forward(120)

turtle.right(45)

turtle.forward(330)

turtle.right(45)

turtle.forward(120)

turtle.up()

turtle.goto(0,0)

turtle.down()

turtle.color('yellow','red')

turtle.begin_fill()

for i in range(5):

    turtle.forward(200)

    turtle.left(144)

turtle.end_fill()

turtle.penup()

turtle.goto(-150,-120)

turtle.color('violet')

turtle.write('Hello',font=('Arial',40,'normal'))

2020级4班李甲、范栩铭的作品

代码：

import turtle

turtle.setup(800,600)

turtle.bgcolor("red")

turtle.fillcolor("yellow")

turtle.color('yellow')

turtle.speed(10)

#主星

turtle.begin_fill()

turtle.up()

turtle.goto(-300,170)

turtle.down()

for i in range (5):

    turtle.forward(150)

    turtle.right(144)

turtle.end_fill()

#第1颗副星

turtle.begin_fill()

turtle.up()

turtle.goto(-100,245)

turtle.setheading(305)

turtle.down()

for i in range (5):

    turtle.forward(50)

    turtle.left(144)

turtle.end_fill()

#第2颗副星

turtle.begin_fill()

turtle.up()

turtle.goto(-50,172)

turtle.setheading(30)

turtle.down()

for i in range (5):

    turtle.forward(50)

    turtle.right(144)

turtle.end_fill()

#第3颗副星

turtle.begin_fill()

turtle.up()

turtle.goto(-50,95)

turtle.setheading(5)

turtle.down()

for i in range (5):

    turtle.forward(50)

    turtle.right(144)

turtle.end_fill()

#第4颗副星

turtle.begin_fill()

turtle.up()

turtle.goto(-100,40)

turtle.setheading(300)

turtle.down()

for i in range (5):

    turtle.forward(50)

    turtle.left(144)

turtle.end_fill()

2020级2班韩国伟提供的范例

代码：

from turtle import *

def go_to(x, y):

    penup()

    goto(x, y)

    pendown()

def help_do():

    go_to(-400, 0)

    forward(800)

    go_to(-400, 100)

    forward(800)

    go_to(-400,200)

    forward(800)

    go_to(-400, -100)

    forward(800)

    go_to(-400, -200)

    forward(800)

    left(90)

    go_to(0,-300)

    forward(600)

    go_to(100, -300)

    forward(600)

    go_to(-100, -300)

    forward(600)

    go_to(-200, -300)

    forward(600)

    go_to(200, -300)

    forward(600)

def head():

    go_to(-200, 180)

    fillcolor('yellow')

    begin_fill()

    seth(-30)

    for _ in range(6):

        circle(36, 60)

        circle(-36, 60)

    seth(-125)

    for _ in range(5):

        circle(40,60)

        circle(-40,60)

    seth(-210)

    for _ in range(4):

        circle(45,60)

        circle(-45,60)

    seth(65)

    for _ in range(5):

        circle(40,60)

        circle(-40,60)

    end_fill()

def eye():

    # 眼白

    go_to(14, -5)

    fillcolor('#f0f0f0')

    begin_fill()

    circle(65, 360)

    end_fill()

    begin_fill()

    go_to(13,12)

    seth(98)

    circle(-65,360)

    end_fill()

    #眼球

    go_to(-10,20)

    fillcolor('blue')

    begin_fill()

    circle(20,360)

    end_fill()

    go_to(-22,20)

    fillcolor('black')

    begin_fill()

    circle(7,360)

    end_fill()

    go_to(40,15)

    fillcolor('blue')

    begin_fill()

    circle(-20, 360)

    end_fill()

    go_to(53,15)

    fillcolor('black')

    begin_fill()

    circle(-7,360)

    end_fill()

    #睫毛

    go_to(-95,65)

    left(20)

    forward(40)

    go_to(-50,87)

    right(25)

    forward(32)

    go_to(0,70)

    right(25)

    forward(40)

    go_to(40, 75)

    left(35)

    forward(40)

    go_to(90, 87)

    right(18)

    forward(30)

    go_to(120, 70)

    right(25)

    forward(40)

def nose():

    fillcolor('yellow')

    go_to(0, -7)

    begin_fill()

    right(50)

    circle(-60, 30)

    color('yellow')

    goto(15,-40)

    end_fill()

    color('black')

    go_to(0, -7)

    seth(-75)

    forward(30)

    go_to(30,-7)

    seth(-105)

    forward(30)

def mouth():

    go_to(-120, - 60)

    seth(-45)

    circle(200, 30)

    seth(0)

    forward(100)

    seth(15)

    circle(200, 30)

def tooth():

    go_to(-30,-114)

    seth(-95)

    fillcolor('white')

    begin_fill()

    forward(30)

    seth(0)

    forward(40)

    seth(95)

    forward(30)

    go_to(-30,-114)

    end_fill()

    go_to(30, -114)

    seth(-95)

    fillcolor('white')

    begin_fill()

    forward(30)

    seth(0)

    forward(40)

    seth(95)

    forward(30)

    go_to(60, -114)

    end_fill()

def hole():

    go_to(-160,160)

    # fillcolor('#ffd700')

    # begin_fill()

    circle(30, 360)

    # a=1

    # for i in range(120):

    #     if 0<=i<30 or 60<=i<90:

    #         a=a+0.2

    #         lt(3)

    #         forward(a)

    #     else:

    #         a=a-0.2

    #         lt(3)

    #         forward(a)

    # end_fill()

def face():

    eye()

    nose()

    mouth()

    tooth()

    # hole()

def body():

    go_to(-170,-180)

    seth(-120)

    circle(150, 30)

    seth(0)

    forward(40)

    seth(100)

    forward(35)

    seth(-80)

    forward(100)

    fillcolor('brown')

    begin_fill()

    seth(0)

    forward(300)

    seth(80)

    forward(110)

    seth(-100)

    forward(65)

    seth(180)

    forward(315)

    go_to(-118,-400)

    end_fill()

    go_to(-170,-255)

    fillcolor('yellow')

    begin_fill()

    seth(-75)

    forward(80)

    seth(0)

    forward(17)

    seth(105)

    forward(85)

    end_fill()

    go_to(200, -170)

    seth(-60)

    circle(-150,30)

    seth(-180)

    forward(45)

    begin_fill()

    seth(0)

    forward(20)

    seth(-100)

    forward(85)

    seth(180)

    forward(20)

    end_fill()

def tie():

    go_to(-50,-225)

    seth(-40)

    forward(40)

    seth(30)

    forward(52)

    go_to(30,-225)

    seth(-30)

    forward(40)

    seth(40)

    forward(45)

    fillcolor('red')

    go_to(0, -240)

    begin_fill()

    seth(-60)

    forward(10)

    seth(0)

    forward(30)

    seth(60)

    forward(15)

    go_to(30,-225)

    end_fill()

    go_to(4,-250)

    begin_fill()

    seth(-100)

    forward(80)

    seth(0)

    forward(55)

    seth(100)

    forward(80)

    end_fill()

def spongeBob():

    # help_do()

    head()

    face()

    body()

    tie()

if __name__=='__main__':

    screensize(800, 600, 'white')

    pensize(3)

    speed(10)

    go_to(0, 0)

    spongeBob()

    go_to(-100,240)

    write('海绵宝宝',font=('BRUSHSCI.TTF', '30', 'bold'))

    mainloop()

     虽然是海龟绘图入门级内容，但都是孩子们自己灵活运用函数、坐标定位等知识，思考下进行的创作。

海龟绘图：直角坐标绘火柴人

海龟绘图：课堂时分，一起来创作

海龟绘图三则：你模仿创作，我展出

海龟绘图：三种双圆画法

海龟绘图，编程入门学习的你会了吗？

[课堂作业选登] 课堂时分，他们尽情展示

【课堂作业选例】  海龟画图一