python 繪制國旗的示例

更新時間：2020年09月27日 08:31:32 作者：Python技術

這篇文章主要介紹了python 繪制國旗的示例，幫助大家利用python繪制，處理圖像，感興趣的朋友可以了解下

國旗是一個國家的象征，它可以反映一個國家的特色和傳統(tǒng)，國旗起源于近代的歐洲，是一個國家主權意識不斷增強后的必然產物，本文我們使用 Python 來畫幾面國旗，使用的 Python 庫是大家比較熟悉的 turtle。

五星紅旗

五星紅旗是中華人民共和國的國旗，它是由四顆小的黃五角星環(huán)繞一顆大的黃五角星組成的，底色為紅色，實現代碼如下：

turtle.setup(600,400,0,0)
turtle.bgcolor("red")
turtle.fillcolor("yellow")
turtle.color('yellow')
turtle.speed(10)
# 主星
turtle.begin_fill()
turtle.up()
turtle.goto(-280,100)
turtle.down()
for i in range (5):
  turtle.forward(150)
  turtle.right(144)
turtle.end_fill()
# 副星
turtle.begin_fill()
turtle.up()
turtle.goto(-100,180)
turtle.setheading(305)
turtle.down()
for i in range (5):
  turtle.forward(50)
  turtle.left(144)
turtle.end_fill()
turtle.begin_fill()
turtle.up()
turtle.goto(-50,110)
turtle.setheading(30)
turtle.down()
for i in range (5):
  turtle.forward(50)
  turtle.right(144)
turtle.end_fill()
turtle.begin_fill()
turtle.up()
turtle.goto(-40,50)
turtle.setheading(5)
turtle.down()
for i in range (5):
  turtle.forward(50)
  turtle.right(144)
turtle.end_fill()
turtle.begin_fill()
turtle.up()
turtle.goto(-100,10)
turtle.setheading(300)
turtle.down()
for i in range (5):
  turtle.forward(50)
  turtle.left(144)
turtle.end_fill()
turtle.hideturtle()
turtle.done()

實現效果如下：

青天白日旗

青天白日旗是民國時期的國旗，旗面作藍色以示青天，旗中置一射出叉光的白日圖案，實現代碼如下：

t.colormode(255)
rcblue=(4,0,174)
rcred=(254,0,0)
def ol(r):
  na = 15 / 180 * math.pi
  ol=2*r*math.cos(na)
  ol=int(round(ol))
  return ol
def loop(r):
  t.fd(ol(r))
  t.right(150)
def main0(a,b):
  t.color(rcred)
  t.penup()
  t.goto(-a/2,b/2)
  t.pendown()
  t.begin_fill()
  t.goto(-a/2,-b/2)
  t.goto(a/2,-b/2)
  t.goto(a/2,b/2)
  t.end_fill()
  t.penup()
  t.goto(-a/4,b/4)
  t.pendown()
def main1(a1,b1):
  t.color('gray',rcblue)
  t.penup()
  t.right(90)
  t.fd(b1/2)
  t.left(90)
  t.pendown()
  t.begin_fill()
  t.fd(a1/2)
  t.left(90)
  t.fd(b1)
  t.left(90)
  t.fd(a1)
  t.left(90)
  t.fd(b1)
  t.left(90)
  t.fd(a1/2)
  t.end_fill()
  t.penup()
  t.goto(-a/4,b/4)
  t.seth(0)
  t.pendown()
def main2(r):
  t.pensize = 20
  t.color('white', 'white')
  t.penup()
  t.fd(r)
  t.right(180 - 30 / 2)
  t.pendown()
  t.begin_fill()
  for i in range(12):
    loop(r)
  t.end_fill()
  t.penup()
  t.goto(-a/4,b/4)
  t.seth(0)
  t.pendown()
def main3(r1,r2):
  t.color(rcblue, rcblue) 
  t.begin_fill()
  t.up()
  t.right(90)
  t.fd(r1)
  t.left(90)
  t.pd()
  t.circle(r1)
  t.end_fill()
  t.penup()
  t.goto(-a/4,b/4)
  t.pendown()
  t.color('white', 'white')
  t.begin_fill()
  t.pu()
  t.right(90)
  t.fd(r2)
  t.left(90)
  t.pd()
  t.circle(r2)
  t.end_fill()
  t.penup()
  t.goto(-a/4,b/4)
  t.seth(0)
  t.pendown()
def main(a,b):
  a1 = a / 2
  b1 = b / 2
  r = a1 / 4
  r2 = a1 / 8
  r1 = b1 * 17 / 80
  main0(a,b)
  main1(a1,b1)
  main2(r)
  main3(r1,r2)
a=1020
b=680
t.setup(1100,700,100,0)

實現效果如下：

紅底白十字旗

紅底白十字旗是瑞士的國旗，與其他國家有點不同，瑞士的國旗形狀是正方形的，代表了該國堅守中立的政策，實現代碼如下：

def draw_crossshaped(aTurtle, width=0, height=0, color=None):
  aTurtle = turtle.Turtle()
  aTurtle.hideturtle()
  aTurtle.penup()
  aTurtle.goto(30, 50)
  aTurtle.begin_fill()
  aTurtle.fillcolor(color)
  for i in range(4):
    aTurtle.pendown()
    aTurtle.fd(width)
    aTurtle.rt(90)
    aTurtle.fd(height)
    aTurtle.rt(90)
    aTurtle.fd(width)
    aTurtle.lt(90)
  aTurtle.end_fill()
def draw_RQ(times=20.0):
  width, height = 26 * times, 26 * times
  window = turtle.Screen()
  aTurtle = turtle.Turtle()
  aTurtle.hideturtle()
  aTurtle.speed(10)
  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()
  draw_crossshaped(aTurtle, width=80, height=80, color='white')
  window.exitonclick()

實現效果如下：

星條旗

星條旗是美國的國旗，由兩部分組成，旗的左上方藍底上排列著 50 顆白色的星，其余部分是 13 道紅白相間的條子，實現代碼如下：

# 畫條紋
def drawSquar():
  turtle.color('black', 'red')
  turtle.begin_fill()
  for i in range(7):
    turtle.forward(600)
    turtle.left(90)
    turtle.forward(350 / 13)
    turtle.left(90)
    turtle.forward(600)
    turtle.right(90)
    turtle.forward(350 / 13)
    turtle.right(90)
  turtle.end_fill()
# 畫左上角的小矩形
def drawSmallsqure():
  turtle.color('blue')
  turtle.begin_fill()
  turtle.left(90)
  turtle.forward(350 / 2)
  turtle.left(90)
  turtle.forward(300)
  turtle.left(90)
  turtle.forward(350 * 7 / 13)
  turtle.left(90)
  turtle.forward(300)
  turtle.end_fill()
# 畫左上角的星星
def drawSrarts():
  x = -10
  y = 0
  for k in range(4):
    x = -15
    for i in range(6):
      turtle.goto(x, y)
      turtle.color('white')
      turtle.begin_fill()
      for j in range(5):
        turtle.left(144)
        turtle.forward(20)
      x -= 50
      turtle.end_fill()
    y += 350 / 13 * 2
  x = -10
  y = 350 / 13
  for i in range(3):
    x = -35
    for j in range(5):
      turtle.goto(x, y)
      turtle.color('white')
      turtle.begin_fill()
      for k in range(5):
        turtle.left(144)
        turtle.forward(20)
      x -= 50
      turtle.end_fill()
    y += 350 / 13 * 2
turtle.setup(0.8, 0.8, -100, -100)
turtle.speed(10)
turtle.pu()
turtle.forward(300)
turtle.left(90)
turtle.forward(350 / 2)
turtle.left(90)
drawSquar()
turtle.home()
drawSmallsqure()
turtle.home()
drawSrarts()
turtle.hideturtle()
turtle.done()

實現效果如下：