# tk_9_colors_interpolate.py

# tk_9_colors_interpolate.py

import tkinter as tk
from PIL import Image, ImageTk

WW, HH = 600, 600

root = tk.Tk()
canvas = tk.Canvas(root, width=WW, height=HH)
root.geometry("%dx%d+10+10" % (WW, HH))
canvas.pack()
image = Image.new("RGB", (WW, HH))

def interpolate_color(color1, color2, factor):
    return tuple(int(color1[i] + (color2[i] - color1[i]) * factor) for i in range(3))

grid_colors = {
    (0, 0): (255, 255, 255),  # White
    (0, 1): (255, 255, 0),    # Yellow
    (0, 2): (0, 255, 0),      # Green
    (1, 0): (255, 165, 0),    # Orange
    (1, 1): (128, 128, 128),  # Gray (midpoint)
    (1, 2): (0, 0, 255),      # Blue
    (2, 0): (255, 0, 0),      # Red
    (2, 1): (128, 0, 128),    # Purple
    (2, 2): (0, 0, 0)         # Black
}

# Interpolate colors for each pixel
for i in range(WW):
    for j in range(HH):
        x = i / (WW - 1) * 2
        y = j / (HH - 1) * 2
        x0, y0 = int(x), int(y)
        x1, y1 = min(x0 + 1, 2), min(y0 + 1, 2)
        fx, fy = x - x0, y - y0

        color_top = interpolate_color(grid_colors[(x0, y0)], grid_colors[(x1, y0)], fx)
        color_bottom = interpolate_color(grid_colors[(x0, y1)], grid_colors[(x1, y1)], fx)
        color = interpolate_color(color_top, color_bottom, fy)

        image.putpixel((i, j), color)

gradient_photo = ImageTk.PhotoImage(image)

canvas.create_image(0, 0, anchor=tk.NW, image=gradient_photo)
canvas.update()