实验6 turtle绘图与Python库应用编程体验

task1-1.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()

实验结果：

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()

实验结果：

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()

实验结果：

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()

实验结果：

task3-1.py

实验源码：

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()

实验结果：

task3-2.py

实验源码：

from turtle import *
speed(0)
setup(800, 600)
pencolor('pink')
n = 10
for i in range(n):
    for j in range(2):
        circle(80, 90)
        left(90)
    right(360/n)
hideturtle()
done()

实验结果：

task4

实验源码：

from turtle import *
setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)

angle = 0
size = 2

n = 5   #改
count = 50
for i in range(count):
    fd(size)
    angle += 360/n #改
    seth(angle)
    size += 5

hideturtle()
done()

实验结果：

task5-1

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()

实验结果：

task5-2

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()

实验结果：

task6-1.py

实验源码：

from turtle import *
from random import random
strip = Turtle()
setup(800, 600)
strip.speed(0)

def colors():  # 获取颜色
    return tuple(random() for i in range(3))

strip.penup()
strip.goto(-200,0)
strip.pendown()

for i in range(20):
    strip.color(colors())
    strip.begin_fill()
    for j in range(2):
        strip.fd(20)
        strip.left(90)
        strip.fd(60)
        strip.left(90)
    strip.fd(20)
    strip.end_fill()

strip.hideturtle()
done()

实验结果：

task6-2.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()

实验结果：