import turtle import time # 清屏函数 def clear_all(): turtle.penup() turtle.goto(0,
0) turtle.color('white') turtle.pensize(800) turtle.pendown()
turtle.setheading(0) turtle.fd(300) turtle.bk(600) # 重定位海龟的位置 def go_to(x, y,
state): turtle.pendown() if state else turtle.penup() turtle.goto(x, y) # 画线 #
state为真时海龟回到原点,为假时不回到原来的出发点 def draw_line(length, angle, state):
turtle.pensize(1) turtle.pendown() turtle.setheading(angle) turtle.fd(length)
turtle.bk(length) if state else turtle.penup() turtle.penup() # 画箭羽 def
draw_feather(size): angle = 30 # 箭的倾角 feather_num = size//6 # 羽毛的数量
feather_length = size // 3 # 羽毛的长度 feather_gap = size//10 # 羽毛的间隔 for i in
range(feather_num): draw_line(feather_gap, angle+180, False) # 箭柄,不折返
draw_line(feather_length, angle + 145, True) # 羽翼,要折返 draw_line(feather_length,
angle + 145, False) draw_line(feather_num*feather_gap, angle, False)
draw_line(feather_length, angle + 145 + 180, False) for i in
range(feather_num): draw_line(feather_gap, angle+180, False) # 箭柄,不折返
draw_line(feather_length, angle - 145, True) # 羽翼,要折返 draw_line(feather_length,
angle - 145, False) draw_line(feather_num*feather_gap, angle, False)
draw_line(feather_length, angle - 145 + 180, False) # 画爱心 def draw_heart(size):
turtle.color('red', 'pink') turtle.pensize(2) turtle.pendown()
turtle.setheading(150) turtle.begin_fill() turtle.fd(size) turtle.circle(size *
-3.745, 45) turtle.circle(size * -1.431, 165) turtle.left(120)
turtle.circle(size * -1.431, 165) turtle.circle(size * -3.745, 45)
turtle.fd(size) turtle.end_fill() # 画箭 def draw_arrow(size): angle = 30
turtle.color('black') draw_feather(size) turtle.pensize(4)
turtle.setheading(angle) turtle.pendown() turtle.fd(size*2) # 一箭穿心 #
箭的头没有画出来,而是用海龟来代替 def arrow_heart(x, y, size): go_to(x, y, False)
draw_heart(size*1.15) turtle.setheading(-150) turtle.penup()
turtle.fd(size*2.2) draw_heart(size) turtle.penup() turtle.setheading(150)
turtle.fd(size * 2.2) draw_arrow(size) # 画出发射爱心的小人 def draw_people(x, y):
turtle.penup() turtle.goto(x, y) turtle.pendown() turtle.pensize(2)
turtle.color('black') turtle.setheading(0) turtle.circle(60, 360)
turtle.penup() turtle.setheading(90) turtle.fd(75) turtle.setheading(180)
turtle.fd(20) turtle.pensize(4) turtle.pendown() turtle.circle(2, 360)
turtle.setheading(0) turtle.penup() turtle.fd(40) turtle.pensize(4)
turtle.pendown() turtle.circle(-2, 360) turtle.penup() turtle.goto(x, y)
turtle.setheading(-90) turtle.pendown() turtle.fd(20) turtle.setheading(0)
turtle.fd(35) turtle.setheading(60) turtle.fd(10) turtle.penup() turtle.goto(x,
y) turtle.setheading(-90) turtle.pendown() turtle.fd(40) turtle.setheading(0)
turtle.fd(35) turtle.setheading(-60) turtle.fd(10) turtle.penup()
turtle.goto(x, y) turtle.setheading(-90) turtle.pendown() turtle.fd(60)
turtle.setheading(-135) turtle.fd(60) turtle.bk(60) turtle.setheading(-45)
turtle.fd(30) turtle.setheading(-135) turtle.fd(35) turtle.penup() # 第一个画面,显示文字
def page0(): turtle.penup() turtle.goto(-350, 0) turtle.color('black')
turtle.write('专属于我们的情人节', font=('宋体', 60, 'normal')) time.sleep(3) #
第二个画面,显示发射爱心的小人 def page1(): turtle.speed(10) draw_people(-250, 20)
turtle.penup() turtle.goto(-150, -30) draw_heart(14) turtle.penup()
turtle.goto(-20, -60) draw_heart(25) turtle.penup() turtle.goto(250, -100)
draw_heart(45) turtle.hideturtle() time.sleep(3) # 最后一个画面,一箭穿心 def page2():
turtle.speed(1) turtle.penup() turtle.goto(-200, -200) turtle.color('blue')
turtle.pendown() turtle.write('ZBT CJH', font=('wisdom', 50, 'normal'))
turtle.penup() turtle.goto(0, -180) draw_heart(10) arrow_heart(20, -60, 51)
turtle.showturtle() def main(): turtle.setup(900, 500) page0() clear_all()
page1() clear_all() page2() turtle.done() main()

技术
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