# lanczos2 kernel interval -2:0
# generating 512 point LUT
# 511 is centerpoint

# lanczos defined as sinc(x) * sinc(x/a)
# a is order (2)
# sinc(x) = sin(x) / x
# output format:
# 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 0xNNNN, 
# x32 lines

import numpy as np

for j in range(0, 512, 16):
    lineString = ""
    for k in range(16):
        i = j + k
        x = (i - 511) / 256
        y = np.sinc(x) * np.sinc(x / 2)
        y *= 32767
        lineString += hex(int(y))
        lineString += ", "
    print(lineString)