实验6 turtle绘图与python库应用编程体验

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()

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()

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

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 = 20 # 圆初始半径
    offset = 20 # 同心圆每次位移量
    for i in range(9):
        moveto(0, -radius)
        color(gen_color())
        circle(radius)
        radius += offset
    hideturtle()
    done()
main()

from turtle import *
def square(size = 50, rgb = 'pink'):

    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(10):
    # 绘制一片花瓣
    for j in range(2):
        circle(80, 90)
        left(90)
    right(360/n)
hideturtle()
done()

from turtle import *
setup(800, 600)
bgcolor('black')
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()

from turtle import *

right(45)
penup()
goto(-100,-100)
pendown()
begin_fill()
pencolor('black')
fillcolor('black')
circle(100*2**0.5,steps = 4)
end_fill()

left(45)
penup()
goto(0,-100)
pendown()
pensize(2)
pencolor('red')
begin_fill()
fillcolor('red')
circle(100,steps = 4)
end_fill()

hideturtle()
done()

from turtle import *

pensize(2)
pencolor('blue')
for i in range(5):
    setheading(90)
    r = 40+20*i
    goto(r,0)
    circle(r,extent = 90)
    goto(0,0)
hideturtle()
done()

from turtle import *
from random import random

setup(800,600)
def gen_color():
    return tuple((random() for i in range(3)))
def rectangle():
    color(gen_color())
    begin_fill()
    for i in range(2):
        forward(5)
        left(90)
        forward(20)
        left(90)
    end_fill()
penup()
goto(-10*5,0)
pendown()
for k in range(20):
    rectangle()
    forward(5)

hideturtle()
done()