1、彩虹
（1）
1 from turtle import * 2 3 def HSB2RGB(hues): 4 hues = hues * 3.59 #100转成359范围 5 rgb=[0.0,0.0,0.0] 6 i = int(hues/60)%6 7 f = hues/60 -i 8 if i == 0: 9 rgb[0] = 1; rgb[1] = f; rgb[2] = 0 10 elif i == 1: 11 rgb[0] = 1-f; rgb[1] = 1; rgb[2] = 0 12 elif i == 2: 13 rgb[0] = 0; rgb[1] = 1; rgb[2] = f 14 elif i == 3: 15 rgb[0] = 0; rgb[1] = 1-f; rgb[2] = 1 16 elif i == 4: 17 rgb[0] = f; rgb[1] = 0; rgb[2] = 1 18 elif i == 5: 19 rgb[0] = 1; rgb[1] = 0; rgb[2] = 1-f 20 return rgb 21 22 def rainbow(): 23 hues = 0.0 24 color(1,0,0) 25 #绘制彩虹 26 hideturtle() 27 speed(100) 28 pensize(3) 29 penup() 30 goto(-400,-300) 31 pendown() 32 right(110) 33 for i in range (100): 34 circle(1000)#圆，彩虹 35 right(0.13) 36 hues = hues + 1 37 rgb = HSB2RGB(hues) 38 color(rgb[0],rgb[1],rgb[2]) 39 penup() 40 41 def main(): 42 setup(800, 600,0,0) 43 bgcolor((0.8, 0.8, 1.0)) 44 #tracer(False) 45 rainbow() 46 #输出文字 47 tracer(False) 48 goto(100,-100) 49 pendown() 50 color("red") 51 write("Rainbow",align="center", 52 font=("Script MT Bold", 80, "bold")) 53 #tracer(True) 54 55 mainloop() 56 57 if __name__ == "__main__": 58 main()
2、雪花
1 from turtle import * 2 from random import * 3 4 def ground():#画下面的土地 5 hideturtle() #隐藏乌龟 6 speed(100) #速度 7 for i in range(400): 8 pensize(randint(5,10))#画笔尺寸 9 10 x = randint(-400,350)#位置 11 y = randint(-280,-1) 12 13 r = -y/280 14 g = -y/280 15 b = -y/280 16 17 pencolor((r, g, b))#颜色暗色调, (1,1,1)白色;(0,0,0)黑色;(100)红色;(010)绿色;(001)蓝色 18 penup() 19 goto(x,y)#移动x轴 20 pendown() 21 22 forward(randint(40,100)) 23 24 def snow(): 25 hideturtle() 26 pensize(2) 27 speed(100) 28 for i in range(100): 29 r = random() 30 g = random() 31 b = random() 32 pencolor(r, g, b)#随机生成 33 34 penup() 35 setx(randint(-350,350)) 36 sety(randint(1,270)) 37 pendown() 38 39 dens = randint(8,12)#雪瓣 40 snowsize = randint(10,14) 41 for j in range(dens): 42 forward(snowsize) 43 backward(snowsize) 44 right(360/dens) 45 46 47 def main(): 48 setup(800, 600, 0, 0) 49 tracer(False) 50 bgcolor("black") 51 snow() 52 ground() 53 tracer(True) 54 mainloop() 55 56 if __name__ == "__main__": 57 main()
