# Tk_radial_gradients_spin.py

# Tk_radial_gradients_spin.py

from Tkinter import *
from PIL import Image, ImageTk
import random

import math

ww = 512
hh = 512
ww2 = ww/2
hh2 = hh/2
root = Tk()
root.title("Tk Radial Gradients Spin.py")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.grid()

img = Image.new("RGB",(ww,hh))

ttt = range(256)
ttt = [0]+ttt[:-1]+ttt[::-1]
tL = len(ttt)

pix = []
for y in range(hh):
	for x in range(ww):
		pix.append(0)
0

rrr = {}
for y in range(hh):
	for x in range(ww):
		z = int((abs(ww2-x)**2+abs(hh2-y)**2)**0.5)
		if x < ww2:
			t = 0
			if y > hh2:
				t = 2
		else:
			t = 1
			if y > hh2:
				t = 3
		try:
			rrr[z] += [(t,x,y)]
		except:
			rrr[z] = [(t,x,y)]
0

b = 5
qqq = len(rrr)-1
spiral = 0
while 1:
	v = 512*b/360.0
	for z in range(qqq):
		rrr[z].sort()
		L = len(rrr[z])
		L2 = L/2
		r2 = rrr[z][L2:]
		rrr[z] = rrr[z][:L2]+r2[::-1]
		spiral += 1.2
		for p,x,y in rrr[z]:
			p = (math.degrees(math.atan2(256-x,256-y))+180)*v
			pix[x+y*hh] = ttt[int(p+spiral)%tL]
	print b
	img.putdata(pix)
	imgTk = ImageTk.PhotoImage(img)
	canvas.create_image(1, 1, anchor=NW, image=imgTk)
	root.update()
0