# tk_rgb_oops.py

# tk_rgb_oops.py

import tkinter as tk
from PIL import Image, ImageTk
import math
import random

ww = 300
hh = 300

root = tk.Tk()
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = tk.Canvas(root, bg='white', width=ww, height=hh)
canvas.pack()

def xy2deg(x, y):
    return math.degrees(math.atan2(x - cx, y - cy))

rgb = [i for i in range(0, 256, 2)]
COLORS = [(r,g,b) for r in rgb for g in rgb for b in rgb]
cx, cy = ww//2, hh//2

dist_dict = {}
buffer = []
for i in range(ww*hh):
    x = i % ww
    y = i // ww
    dx = cx - x
    dy = cy - y

    distance = dx**2 + dy**2
    try:
        dist_dict[distance] += 0.1
    except:
        dist_dict[distance] = distance
    buffer.append(([xy2deg(x, y), dist_dict[distance]], i))

buffer.sort()
buffer = [x[1] for x in buffer]

# test
img = Image.new('RGB', (ww, hh), "white")
Lc = len(COLORS)
CvSz = ww*hh

for i in range(Lc-CvSz):
    pixels = COLORS[i:i+CvSz]
    pixels = [pixels[j] for j in buffer]
    img.putdata(pixels)
    tkimg = ImageTk.PhotoImage(img)
    canvas.create_image((cx, cy), image=tkimg)
    canvas.update()