# Tk_radial_gradients_spin2.py

# Tk_radial_gradients_spin2.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 = 1
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]
        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]
        spiral += 21
    print b
    img.putdata(pix)
    imgTk = ImageTk.PhotoImage(img)
    canvas.create_image(1, 1, anchor=NW, image=imgTk)
    root.update()
0