TurtleArt美景图

《雪景-Snowfall》

随机因素：

雪花位置

雪花颜色

雪花大小

花瓣数目

地面灰色长短

地面灰色位置

 

from turtle import *
from random import *

def ground():
    hideturtle()
    speed(100)
    for i in range(400):
        pensize(randint(5,10))
        x=randint(-400,350)
        y=randint(-280,-1)
        r=-y/280
        g=-y/280
        b=-y/280
        pencolor(r,g,b)
        penup()
        goto(x,y)
        pendown()
        forward(randint(40,100))

def snow():
    hideturtle()
    pensize(2)
    speed(100)
    for i in range(100):
        r=random()
        g=random()
        b=random()
        pencolor(r,g,b)
        penup()
        setx(randint(-350,350))
        sety(randint(1,270))
        pendown()
        dens=randint(8,12)
        snowsize=randint(10,14)
        for j in range(dens):
            forward(snowsize)
            backward(snowsize)
            right(360/dens)

def main():
    setup(800,600,0,0)
    tracer(False)
    bgcolor("black")
    snow()
    ground()
    tracer(True)
    mainloop()

if __name__=="__main__":
    main()


    

《Rainbow》

颜色空间

RGB模型光的三原色，色相由RGB共同决定

 

HSV模型

H色彩、S深浅、V明暗

色相由H决定

from turtle import *
 
def HSB2RGB(hues):
    hues = hues * 3.59 #100转成359范围
    rgb=[0.0,0.0,0.0]
    i = int(hues/60)%6
    f = hues/60 -i
    if i == 0:
        rgb[0] = 1; rgb[1] = f; rgb[2] = 0
    elif i == 1:
        rgb[0] = 1-f; rgb[1] = 1; rgb[2] = 0
    elif i == 2:
        rgb[0] = 0; rgb[1] = 1; rgb[2] = f
    elif i == 3:
        rgb[0] = 0; rgb[1] = 1-f; rgb[2] = 1
    elif i == 4:
        rgb[0] = f; rgb[1] = 0; rgb[2] = 1
    elif i == 5:
        rgb[0] = 1; rgb[1] = 0; rgb[2] = 1-f
    return rgb
     
def rainbow():
    hues = 0.0
    color(1,0,0)
    #绘制彩虹
    hideturtle()
    speed(100)
    pensize(3)
    penup()
    goto(-400,-300)
    pendown()
    right(110)
    for i in range (100):
        circle(1000)
        right(0.13)
        hues = hues + 1
        rgb = HSB2RGB(hues)
        color(rgb[0],rgb[1],rgb[2])    
    penup()
     
def main():
    setup(800, 600, 0, 0)
    bgcolor((0.8, 0.8, 1.0))
    tracer(False)
    rainbow()
    #输出文字
    tracer(False)
    goto(100,-100)
    pendown()
    color("red")
    write("Rainbow",align="center",
          font=("Script MT Bold", 80, "bold"))
    tracer(True)
     
    mainloop()

if __name__ == "__main__":
    main()