实验6 turtle绘图与python库应用编程体验

task1-1

源代码

 1 from turtle import *
 2 
 3 def move(x, y):
 4     '''画笔移动到坐标(x,y)处'''
 5     penup()
 6     goto(x,y)
 7     pendown()
 8 
 9 def draw(n, size=100):
10     '''绘制边长为size的正n变形'''
11     for i in range(n):
12         fd(size)
13         left(360/n)
14 
15 def main():
16     pensize(2)
17     pencolor('red')
18 
19     move(-200,0)
20     draw(3)
21 
22     move(0,0)
23     draw(4)
24 
25     move(200, 0)
26     draw(5)
27 
28     hideturtle()
29     done()
30 
31 main()

测试结果

task1-2

源代码

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()

测试结果

task2-1

源代码

'''以(0,0)为圆心，绘制9个同心圆'''

from turtle import *

def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

def main():
    setup(800, 600)

    radius = 20
    offset = 20  # 同心圆每次位移量
    for i in range(9):
        moveto(0, -radius)
        circle(radius)
        radius += offset

    hideturtle()
    done()

main()

测试结果

task2-2

源代码

'''以(0, 0)为圆心，绘制9个彩色同心圆，色彩随机生成'''

from turtle import *
from random import random

def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

def gen_color():
    '''生成一个以rgb三元组表示的颜色值并返回'''
    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()

测试结果

task3-1

源代码

from turtle import *

def square(size=50, rgb='pink'):
    '''绘制正方形
    :para: size:int 指定边长 (如未指定参数，使用默认值）
    :para: c: str 指定画笔颜色值 (如未指定参数，使用默认值）
    '''

    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)

def main():
    setup(800, 600)
    speed(0)

    n = 3
    for i in range(n):
        square(80)
        left(360/n)

    hideturtle()
    done()

main()

测试结果

源代码

from turtle import *

def square(size=50, rgb='pink'):
    '''绘制正方形
    :para: size:int 指定边长 (如未指定参数，使用默认值）
    :para: c: str 指定画笔颜色值 (如未指定参数，使用默认值）
    '''

    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)
def trangle(size=50):
    for i in range(3):
        fd(size)
        left(120)



setup(800, 600)
speed(0)
n = 10
for i in range(n):
    square(80)
    left(360/n)



hideturtle()
done()

测试结果

task3-2

源代码

from turtle import *

setup(800, 600)
pencolor('pink')
speed(0)

n=10
for i in range(n):
    for i in range(2):
        circle(80, 90)
        left(90)

    right(360/n)

hideturtle()
done()

测试结果

task4

源代码

from turtle import*

setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)

angle = 0
size = 2

n = 4  # 螺旋n边形
count = 50
for i in range(count):
    fd(size)
    angle += 360/n+1
    seth(angle)
    size += 5

hideturtle()
done()

测试结果

 task5-1

源代码

from turtle import *
def square(size):
    for i in range(4):
        fd(size)
        left(90)



penup()
goto(-100, -100)
pendown()
begin_fill()
fillcolor('black')
square(200)
end_fill()

penup()
goto(0, -100)
pendown()
left(45)
begin_fill()
fillcolor('red')
square(100*(2**0.5))
end_fill()

hideturtle()
done()

测试结果

task5-2

源代码

from turtle import *

pensize(2)
pencolor('blue')

radius = 40
offset = 20

for i in range(5):
    home()
    setheading(0)
    forward(radius)
    left(90)
    circle(radius, 90)
    left(90)
    forward(radius)
    radius += offset

done()

task6

源代码

from turtle import *
def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

bgcolor('black')
pencolor('yellow')
begin_fill()
fillcolor('yellow')
goto(100, 100)
left(135)
circle(100*2**0.5, 270)
end_fill()

pencolor('black')
begin_fill()
fillcolor('black')

moveto(0, 80)
circle(15)
end_fill()

moveto(-15, 90)
begin_fill()
fillcolor('white')
circle(5)
end_fill()

hideturtle()
done()

测试结果