import turtle //導(dǎo)入模塊
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import time
import os
def draw_square(org_x, org_y, x, y): //定義紅旗繪制函數(shù)
turtle.setpos(org_x, org_y) //定義畫筆初始位置
turtle.color('red', 'red') //顏色
turtle.begin_fill() //開始繪制
turtle.fd(x) //繪制偏轉(zhuǎn)方向和角度
turtle.lt(90)
turtle.fd(y)
turtle.lt(90)
turtle.fd(x)
turtle.lt(90)
turtle.fd(y)
turtle.end_fill() //繪制結(jié)束
def draw_star(center_x, center_y, radius): //定義星星繪制函數(shù)
print(center_x, center_y) //顯示位置
turtle.pencolor('black') //畫筆軌跡顏色
turtle.setpos(center_x, center_y) //中心點(diǎn)位置
pt1 = turtle.pos() //偏轉(zhuǎn)角度計(jì)算
turtle.circle(-radius, 360 / 5)
pt2 = turtle.pos()
turtle.circle(-radius, 360 / 5)
pt3 = turtle.pos()
turtle.circle(-radius, 360 / 5)
pt4 = turtle.pos()
turtle.circle(-radius, 360 / 5)
pt5 = turtle.pos()
turtle.color('yellow', 'yellow') //星星顏色
turtle.begin_fill() //開是繪制
turtle.goto(pt3)
turtle.goto(pt1)
turtle.goto(pt4)
turtle.goto(pt2)
turtle.goto(pt5)
turtle.end_fill() //繪制結(jié)束
print(turtle.pos())
turtle.pu() //隱藏畫筆軌跡
draw_square(-320, -260, 660, 440) //繪制紅旗
star_part_x = -320 //自定義星星大小等屬性
star_part_y = -260 + 440
star_part_s = 660 / 30
center_x, center_y = star_part_x + star_part_s * 5, star_part_y - star_part_s * 5 //計(jì)算星星中心點(diǎn)位置
turtle.setpos(center_x, center_y)
turtle.lt(90)
draw_star(star_part_x + star_part_s * 5, star_part_y - star_part_s * 2, star_part_s * 3) //繪制星星
turtle.goto(star_part_x + star_part_s * 10, star_part_y - star_part_s * 2) //同上
turtle.lt(round(turtle.towards(center_x, center_y)) - turtle.heading())
turtle.fd(star_part_s)
turtle.rt(90)
draw_star(turtle.xcor(), turtle.ycor(), star_part_s)
turtle.goto(star_part_x + star_part_s * 12, star_part_y - star_part_s * 4)
turtle.lt(round(turtle.towards(center_x, center_y)) - turtle.heading())
turtle.fd(star_part_s)
turtle.rt(90)
draw_star(turtle.xcor(), turtle.ycor(), star_part_s)
turtle.goto(star_part_x + star_part_s * 12, star_part_y - star_part_s * 7)
turtle.lt(round(turtle.towards(center_x, center_y)) - turtle.heading())
turtle.fd(star_part_s)
turtle.rt(90)
draw_star(turtle.xcor(), turtle.ycor(), star_part_s)
turtle.goto(star_part_x + star_part_s * 10, star_part_y - star_part_s * 9)
turtle.lt(round(turtle.towards(center_x, center_y)) - turtle.heading())
turtle.fd(star_part_s)
turtle.rt(90)
draw_star(turtle.xcor(), turtle.ycor(), star_part_s)
turtle.ht()
time.sleep(5) //設(shè)置掛起時(shí)間
os._exit(1)
#?python6.6
import?turtle
def?test():
#?加納共和國國旗呈長方形,長與寬之比為3∶2。
#?自上而下由紅、黃、綠三個(gè)平行相等的橫長方形組成,黃色部分中間是一顆黑色五角星。
flag_h?=?300
flag_w?=?450
star_h?=?flag_h/3
turtle.pensize(2)
turtle.speed(5)
turtle.hideturtle()
def?draw_rectangle(color):
turtle.pencolor(color)
turtle.fillcolor(color)
turtle.pendown()
turtle.begin_fill()
turtle.forward(flag_w)
turtle.right(90)
turtle.forward(star_h)
turtle.right(90)
turtle.forward(flag_w)
turtle.right(90)
turtle.forward(star_h)
turtle.end_fill()
turtle.penup()
turtle.back(star_h)
turtle.right(90)
turtle.penup()
turtle.goto(-flag_w?/?2,?flag_h?/?2)
draw_rectangle("red")
draw_rectangle("yellow")
draw_rectangle("green")
#?五角星
turtle.penup()
turtle.goto(0,?star_h/2)
turtle.pencolor("black")
turtle.fillcolor("black")
turtle.right(90-18)
turtle.pendown()
turtle.begin_fill()
for?i?in?range(5):
turtle.forward(star_h)
turtle.right(180-36)
turtle.end_fill()
turtle.done()
if?__name__?==?"__main__":
test()
把整個(gè)國旗換成直角坐標(biāo)系。
在Python中繪制標(biāo)準(zhǔn)國旗并不簡單,我們采用的方法在數(shù)學(xué)上稱為解析法。把整個(gè)國旗換成直角坐標(biāo)系,中心坐標(biāo)為(0,0)。每個(gè)小格邊長20,則國旗左上角坐標(biāo)為(-300,200)、國旗長600,高400。Turtle是小海龜繪圖庫,Math是數(shù)學(xué)庫,要用到里面的三角函數(shù)和反三角函數(shù),以及圓周率pi值。
Python是一種解釋型、面向?qū)ο蟆?dòng)態(tài)數(shù)據(jù)類型的高級(jí)程序設(shè)計(jì)語言。 Python于1989年底發(fā)明,第一個(gè)公開發(fā)行版發(fā)行于1991年。
參考下五星紅旗
code#!/usr/bin/env python
# -*- coding: utf-8 –*-
''' 對(duì)于turtle類的一些封裝方法,包括畫正多邊形,正多角形和五星紅旗。'''
__author__ = 'Hu Wenchao'
import turtle
import math
def draw_polygon(aTurtle, size=50, n=3):
''' 繪制正多邊形
args:
aTurtle: turtle對(duì)象實(shí)例
size: int類型,正多邊形的邊長
n: int類型,是幾邊形
'''
for i in xrange(n):
aTurtle.forward(size)
aTurtle.left(360.0/n)
def draw_n_angle(aTurtle, size=50, num=5, color=None):
''' 繪制正n角形,默認(rèn)為黃色
args:
aTurtle: turtle對(duì)象實(shí)例
size: int類型,正多角形的邊長
n: int類型,是幾角形
color: str, 圖形顏色,默認(rèn)不填色
'''
if color:
aTurtle.begin_fill()
aTurtle.fillcolor(color)
for i in xrange(num):
aTurtle.forward(size)
aTurtle.left(360.0/num)
aTurtle.forward(size)
aTurtle.right(2*360.0/num)
if color:
aTurtle.end_fill()
def draw_5_angle(aTurtle=None, start_pos=(0,0), end_pos=(0,10), radius=100, color=None):
''' 根據(jù)起始位置、結(jié)束位置和外接圓半徑畫五角星
args:
aTurtle: turtle對(duì)象實(shí)例
start_pos: int的二元tuple,要畫的五角星的外接圓圓心
end_pos: int的二元tuple,圓心指向的位置坐標(biāo)點(diǎn)
radius: 五角星外接圓半徑
color: str, 圖形顏色,默認(rèn)不填色
'''
aTurtle = aTurtle or turtle.Turtle()
size = radius * math.sin(math.pi/5)/math.sin(math.pi*2/5)
aTurtle.left(math.degrees(math.atan2(end_pos[1]-start_pos[1], end_pos[0]-start_pos[0])))
aTurtle.penup()
aTurtle.goto(start_pos)
aTurtle.fd(radius)
aTurtle.pendown()
aTurtle.right(math.degrees(math.pi*9/10))
draw_n_angle(aTurtle, size, 5, color)
def draw_5_star_flag(times=20.0):
''' 繪制五星紅旗
args:
times: 五星紅旗的規(guī)格為30*20, times為倍數(shù),默認(rèn)大小為10倍, 即300*200
'''
width, height = 30*times, 20*times
# 初始化屏幕和海龜
window = turtle.Screen()
aTurtle = turtle.Turtle()
aTurtle.hideturtle()
aTurtle.speed(10)
# 畫紅旗
aTurtle.penup()
aTurtle.goto(-width/2, height/2)
aTurtle.pendown()
aTurtle.begin_fill()
aTurtle.fillcolor('red')
aTurtle.fd(width)
aTurtle.right(90)
aTurtle.fd(height)
aTurtle.right(90)
aTurtle.fd(width)
aTurtle.right(90)
aTurtle.fd(height)
aTurtle.right(90)
aTurtle.end_fill()
# 畫大星星
draw_5_angle(aTurtle, start_pos=(-10*times, 5*times), end_pos=(-10*times, 8*times), radius=3*times, color='yellow')
# 畫四個(gè)小星星
stars_start_pos = [(-5, 8), (-3, 6), (-3, 3), (-5, 1)]
for pos in stars_start_pos:
draw_5_angle(aTurtle, start_pos=(pos[0]*times, pos[1]*times), end_pos=(-10*times, 5*times), radius=1*times, color='yellow')
# 點(diǎn)擊關(guān)閉窗口
window.exitonclick()
if __name__ == '__main__':
draw_5_star_flag()
/code
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