实验6 turtle绘图与python库应用编程体验

实验任务1

task1_.py

实验源码：

from turtle import *
def move(x, y):
    penup()
    goto(x, y)
    pendown()
def draw(n, size = 100):
    for i in range(n):
        fd(size)
        left(360/n)
def main():
    pensize(2)
    pencolor('red')
    move(-200, 0)
    draw(3)
    move(0, 0)
    draw(4)
    move(200, 0)
    draw(5)
    hideturtle()
    done()
main()

运行测试截图：

 task1_2.py

实验源码：

from turtle import *
def moveto(x, y):
    penup()
    goto(x, y)
    pendown()
def main():
    pensize(2)
    pencolor('blue')
    moveto(-150, 0)
    circle(50)
    moveto(0, 0)
    circle(50, steps = 4)
    moveto(150, 0)
    circle(50, steps = 5)
    moveto(300, 0)
    circle(50, steps = 6)
    hideturtle()
    done()
main()

运行测试截图：

实验任务2

task2_1.py

实验源码：

from turtle import *
def moveto(x, y):
    penup()
    goto(x, y)
    pendown()
def main():
    setup(800, 600)
    radius = 20
    offset = 20
    for i in range(9):
        moveto(0, -radius)
        circle(radius)
        radius += offset
    hideturtle()
    done()
main()

运行测试截图：

 task2_2.py

实验源码：

from turtle import *
from random import random
def moveto(x, y):
    penup()
    goto(x, y)
    pendown()
def gen_color():
    return tuple((random() for i in range(3)))
def main():
    setup(800, 600)
    radius = 180
    offset = 20
    for i in range(8):
        moveto(0, -radius)
        color(gen_color())
        begin_fill()
        circle(radius)
        end_fill()
        radius -= offset
    hideturtle()
    done()
main()

运行测试截图：

实验任务3

task3_1.py

实验源码：

运行测试截图：

from turtle import *
def square(size = 50, rgb = 'orange'):
    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)
def main():
    setup(800, 600)
    speed(0)
    n = 10
    for i in range(n):
        square(80)
        left(360/n)
    hideturtle()
    done()
main()

task3_2.py

实验源码：

from turtle import *
setup(800, 600)
pencolor('pink')
n = 10
for i in range(10):
    for j in range(2):
        circle(80, 90)
        left(90)
    right(360/n)
hideturtle()
done()

运行测试截图：

实验任务4

task4.py

实验源码：

from turtle import *
setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)
angle = 0
size = 2
n = 5
count = 50
for i in range(count):
    fd(size)
    angle += 360/n
    seth(angle)
    size += 5
hideturtle()
done()

运行测试截图：

实验任务5

task5_1.py

实验源码：

from turtle import *
def start(x,y):
    penup()
    goto(x,y)
    pendown()
def main(c,n,l):
    color(c)
    begin_fill()
    for i in range(n):
        fd(l)
        left(360/n)
    end_fill()
start(-100,-100)
main('black',4,200)
start(-100,0)
right(45)
main('red',4,100*2**(1/2))
hideturtle()
done()

运行测试截图：

 task5_2.py

实验源码：

from turtle import *
color('blue')
r = 20
for i in range(5):
    r += 20
    forward(r)
    left(90)
    circle(r,90)
    left(90)
    forward(r)
    left(90)
    forward(40)
    goto(0,0)
hideturtle()
done()

运行测试截图：

实验任务6

task6.py

实验源码：

from turtle import *
def moveto(x,y):
    penup()
    goto(x,y)
    pendown()
bgcolor('black')
moveto(200,-200)
color('yellow')
begin_fill()
left(135)
fd(200)
right(90)
fd(200)
left(90)
circle(200,270)
end_fill()
moveto(80,70)
dot(40,'black')
moveto(72,76)
dot(10,'white')
hideturtle()
done()

运行测试截图：