实验6 turtle绘图与python库应用编程体验

实验任务1

task1_1.py

程序源码：

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

运行测试截图：

task1_2.py

程序源码：

 1 from turtle import*
 2 
 3 def moveto(x,y):#把画笔移动到坐标(x,y)处
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 
 8 def main():
 9     pensize(2)
10     pencolor('blue')
11 
12     moveto(-150,0)
13     circle(50)
14 
15     moveto(0,0)
16     circle(50,steps=4)
17 
18     moveto(150,0)
19     circle(50,steps=5)
20 
21     moveto(300,0)
22     circle(50,steps=6)
23 
24     hideturtle()
25     done()
26 
27 main()

运行测试截图：

 实验任务2

task2_1.py

程序源码：

 1 '''以(0,0)为圆心，绘制9个同心圆'''
 2 from turtle import *
 3 
 4 def moveto(x,y):
 5     penup()
 6     goto(x,y)
 7     pendown()
 8 
 9 def main():
10     setup(800,600)
11 
12     radius=20#初始半径
13     offset=20#同心圆每次位移量
14 
15     for i in range(9):
16         moveto(0,-radius)
17         circle(radius)
18         radius+=offset
19 
20     hideturtle()
21     done()
22 
23 main()

运行测试截图：

 task2_2.py

程序源码：

 1 '''以(0, 0)为圆心，绘制9个彩色同心圆，色彩随机生成'''
 2 
 3 from turtle import *
 4 from random import random
 5 
 6 def moveto(x,y):
 7     penup()
 8     goto(x,y)
 9     pendown()
10 
11 def gen_color():
12     return tuple(random() for i in range(3))
13 
14 def main():
15     setup(800,600)
16 
17     radius=180
18     offset=20
19 
20     for i in range(8):
21         moveto(0,-radius)
22         color(gen_color())
23 
24         begin_fill()
25         circle(radius)
26         end_fill()
27 
28         radius-=offset
29 
30     hideturtle()
31     done()
32 
33 main()

运行测试截图：

实验任务3

task3_1.py

程序源码：

 1 from turtle import *
 2 
 3 def square(size=50,rbg='pink'):
 4     '''绘制正方形
 5     :para: size:int 指定边长 (如未指定参数，使用默认值）
 6     :para: c: str 指定画笔颜色值 (如未指定参数，使用默认值）
 7     '''
 8 
 9     pencolor(rbg)
10     for i in range(4):
11         fd(size)
12         left(90)
13 
14 def main():
15     setup(800, 600)
16     speed(0)
17 
18     n=10
19     for i in range(n):
20         square(80)
21         left(360/n)
22 
23     hideturtle()
24     done()
25 
26 main()

运行测试截图：

 task3_2.py

程序源码：

 1 from turtle import *
 2 
 3 setup(800,600)
 4 pencolor('pink')
 5 speed(0)
 6 
 7 n=10
 8 for i in range(10):
 9     for j in range(2):
10         circle(80,90)
11         left(90)
12 
13     right(360/n)
14 
15 hideturtle()
16 done()

运行测试截图：

 实验任务4

task4.py

程序源码：

 1 from turtle import *
 2 
 3 setup(800, 600)
 4 bgcolor('black')
 5 pencolor('white')
 6 speed(0)
 7 
 8 angle = 0
 9 size = 2
10 
11 n = 5 # 螺旋n边形
12 count = 50 # 循环次数
13 for i in range(count):
14     fd(size)
15     angle += 360/n
16     seth(angle)
17     size += 5
18 
19 hideturtle()
20 done()

运行测试截图：

 实验任务5

task5_1.py

程序源码：

 1 from turtle import *
 2 
 3 def moveto(x,y):
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 
 8 def square():
 9     for i in range(4):
10         fd(200)
11         left(90)
12 def main():
13     moveto(-100, -100)
14     color('black')
15     begin_fill()
16     square()
17     end_fill()
18     
19     moveto(0, -100)
20     color('red')
21     begin_fill()
22     circle(100, steps=4)
23     end_fill()
24 
25     hideturtle()
26     done()
27 
28 main()

运行测试截图：

 task5_2.py

程序源码：

 1 from turtle import *
 2 
 3 pensize(2)
 4 pencolor('blue')
 5 
 6 def main():
 7     for i in range(5):
 8         fd(40+20*i)
 9         left(90)
10         circle(40+20*i,90)
11         left(90)
12         fd(40+20*i)
13         left(90)
14 
15     hideturtle()
16     done()
17 
18 main()

运行测试截图：

 实验任务6

task6.py

程序源码：

 1 from turtle import *
 2 from random import random
 3 
 4 def moveto(x,y):
 5     penup()
 6     goto(x,y)
 7     pendown()
 8 
 9 def gen_color():
10     return tuple(random() for i in range(3))
11 
12 def square():
13     color(gen_color())
14     begin_fill()
15     for i in range(2):
16         fd(10)
17         left(90)
18         fd(25)
19         left(90)
20     end_fill()
21 
22 setup(800,600)
23 
24 moveto(-50,0)
25 for i in range(20):
26     square()
27     fd(10)
28 
29 hideturtle()
30 done()

运行测试截图：