实验6 turtle绘图与python库应用编程体验

实验任务1

from turtle import *

def move(x,y):
    '''画笔移动到坐标(x,y)处'''
    penup()
    goto(x,y)
    pendown()

def draw(n,size = 100):
    '''绘制边长为size的正n边形'''
    for i in range(n):
        fd(size) #画笔向前移动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()

from turtle import *

def moveto(x,y):
    '''把画笔移动至坐标（x,y）处'''
    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()

实验任务2

'''以(0,0)为圆心，绘制9个同心圆'''

from turtle import *

def moveto(x,y):
    '''把画笔移动至坐标（x,y）处'''
    penup()
    goto(x,y)
    pendown()

def main():
    setup(800,600)

    radius = 20 #圆初始半径
    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()

'''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):
    '''把画笔移至坐标(x,y)处'''
    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 #圆初始半径
    offset = 20 #同心圆每次位移量

    for i in range(8):
        moveto(0,-radius)
        color(gen_color())

        begin_fill()
        circle(radius)
        end_fill()

        radius -= offset

    hideturtle()
    done()

main()

实验任务3

from turtle import *

def square(size = 50, rgb = 'orange'):
    '''绘制正方形
    :para:size:int 指定边长(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 = 10
    for i in range(n):
        square(80)
        left(360/n)

    hideturtle()
    done()

main()

from turtle import *

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

n = 10
for i in range(n+1):
    #绘制一片花瓣
    for j in range(2):
        circle(80,90)
        left(90)

    right(360/n)

hideturtle()
done()

实验任务4

from turtle import*

setup(800,600)
bgcolor('black') #背景颜色
pencolor('white')
speed(0)

angle = 0
size = 2

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

hideturtle()
done()

实验任务5

from turtle import *

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

def draw():
    for i in range(4):
            fd(200)
            left(90)

def main():
    move(-100,-100)
    color('black')
    begin_fill()
    draw()
    end_fill()

    move(0,-100)
    color('red')
    begin_fill()
    circle(100,steps = 4)
    end_fill()
    hideturtle()
    done()

main()

from turtle import*

def move(x,y):
    '''画笔移动到坐标(x,y)处'''
    penup()
    goto(x,y)
    pendown()

pensize(2)
pencolor('Blue')
n = 5
left(-90)

for i in range(n):
    left(90)
    move(0,0)
    fd(40+20*i)
    left(90)
    circle(40+20*i,90)
    left(90)
    fd(40+20*i)

hideturtle()
done()

实验任务6

from turtle import *
from random import random

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

def gen_color():
    return tuple(random() for i in range(3))
def rect(a,b,c):
    color(c)
    fd(a)
    left(90)
    fd(b)
    left(90)
    fd(a)
    left(90)
    fd(b)

setup(800,600)
move(-100,0)
for i in range(20):
    c = gen_color()
    begin_fill()
    rect(10,30,c)
    end_fill()
    left(90)
    fd(10)

hideturtle()
done()