Language: Python
IDE：
demand (economics)
Make a rainbow effect
color space
RGB model: the three primary colors of light, which together determine hue
HSB/HSV model: H color, S shade, B saturation, H determines hue
HSB models need to be converted to RGB models
code example：
#-*- coding:utf-8 –*-
from turtle import *
def HSB2RGB(hues):
hues = hues * 3.59 #100 to 359 range
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)
#Painting the rainbow
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()
# Output text
tracer(False)
goto(100,-100)
pendown()
color("red")
write("Me.",align="center",
font=("Script MT Bold", 80, "bold"))
tracer(True)
mainloop()
if __name__ == "__main__":
main()
The effect is demonstrated:
summarize
At first in the picture to add the Chinese "I" when, due to the use of small, but also the occurrence of a messy code, the solution is very simple, in front of the code to add a sentence
#-*- coding:utf-8 –*-
For a more detailed approach, refer to:python Chinese garbled code is not anxious, first read the bytes and characters
The above is the entire content of this article on Python using turtle library to draw a rainbow code example, I hope it will help you. Interested friends can continue to refer to this site:
Drawing diagrams with Python's turtle module
Example of turtle graphing in Python
Python built-in module turtle drawing details
If there are deficiencies, welcome to leave a message to point out. Thank you friends for the support of this site!