#! /usr/bin/python3.13

from PIL import Image
import numpy as np

img    = Image.open("data/src.webp").convert("L")
w, h   = img.size
pxls   = np.array(img, dtype=np.float32)
z_norm = ((pxls / 255.0) * 2.0 - 1.0) * 16.0

verts = []
for y in range (0, h, 4):
    for x in range (0, w, 4):
        nx = (x / (w - 1.0)) * 2.0 - 1.0
        ny = (y / (h - 1.0)) * 2.0 - 1.0
        nz = float (z_norm [y, x])
        verts.append ([nx, ny, nz, 1.0])

print (";;; bad-mesh.el --- we came out of a crazy mind -*- lexical-binding: t -*-")
print (";;")
print (";;; Commentary:")
print (";;")
print (";; Elisp mesh generated from Python and a webp image.")
print (";; I guess I like it fine - so far.")
print (";;")
print (";;; Code:\n")
print ("(defvar img-mesh)\n")
print ("(setf img-mesh `[")
st = False
nd = False
rd = False
for v in verts:
    strv = str(v)
    if (not st):
        st = strv
    elif (not nd):
        nd = strv
    elif (not rd):
        rd = strv
    if (st and nd and rd):
        print (f"[ {st} {nd} {rd} ]")
        st = False
        nd = False
        rd = False
print ("])\n")
print ("(provide 'bad-mesh)")
print (";;; bad-mesh.el ends here\n")