美国国旗
#utf-8
#America(meiguo)
import turtle
import math
def draw_n_angle(aTurtle, size=50, num=5, color=None):
if color:
aTurtle.begin_fill()
aTurtle.fillcolor(color)
for i in range(num):#hua yige wujiaoxing
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=(0,0), radius=0, color=None):
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])))#jisuan liangdian zhi jian de xieqingjiao
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_BQ(times=20.0):
width,height=30*times,20*times
window = turtle.Screen()
aTurtle= turtle.Turtle()
aTurtle.speed(20)
aTurtle.hideturtle()
aTurtle.penup()
aTurtle.goto(-width/2,height/2)
aTurtle.pendown()
for i in range(2):
aTurtle.fd(width)
aTurtle.rt(90)
aTurtle.fd(height)
aTurtle.rt(90)
aTurtle.penup()
for x in range(7):
aTurtle.begin_fill()
aTurtle.fillcolor('red')
aTurtle.fd(width)
aTurtle.rt(90)
aTurtle.fd(height/13)
aTurtle.rt(90)
aTurtle.fd(width)
aTurtle.rt(90)
aTurtle.fd(height/13)
aTurtle.rt(180)
aTurtle.fd(height/13)
aTurtle.lt(90)
aTurtle.end_fill()
aTurtle.fd(width)
aTurtle.rt(90)
aTurtle.fd(height/13)
aTurtle.rt(90)
aTurtle.fd(width)
aTurtle.rt(90)
aTurtle.fd(height/13)
aTurtle.rt(180)
aTurtle.fd(height/13)
aTurtle.lt(90)
aTurtle.pendown()
aTurtle.lt(90)
aTurtle.begin_fill()
aTurtle.fillcolor('blue')
aTurtle.fd(1.0769*height)
aTurtle.rt(90)
aTurtle.fd(0.5*width)
aTurtle.rt(90)
aTurtle.fd(0.5384*height)
aTurtle.rt(90)
aTurtle.fd(0.5*width)
aTurtle.end_fill()
aTurtle.pendown()
stars_start_pos = [(-13, 9), (-11, 9), (-9, 9), (-7, 9),(-5,9),(-3,9),(-12,8),(-10,8),(-8,8),(-6,8),(-4,8),(-13,7),(-11,7),(-9,7),(-7,7),(-5,7),(-3,7),(-12,6),(-10,6),(-8,6),(-6,6),(-4,6),(-13,5),(-11,5),(-9,5),(-7,5),(-5,5),(-3,5),(-12,4),(-10,4),(-8,4),(-6,4),(-4,4),(-13, 3), (-11, 3), (-9, 3), (-7, 3),(-5,3),(-3,3),(-12,2),(-10,2),(-8,2),(-6,2),(-4,2),(-13, 1), (-11, 1), (-9, 1), (-7, 1),(-5,1),(-3,1)]#zidian
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=0.5*times, color='white')
window.exitonclick()
if __name__ == '__main__':
draw_BQ()