Python使用turtle模块绘制爱心图案

程序员的浪漫，你懂吗？

今天使用python小海龟实现爱心图案的绘制，代码如下：

import turtleimport 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()

运行截图如下图所示，其中的姓名缩写可以自行修改。

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