INNER CODE UNIT · Python

generate_brdf_lut

SedulousWorks/SedulousEngine · Scripts/generate_brdf_lut.py:57

def generate_brdf_lut():
    """Generate the BRDF LUT data using vectorized numpy."""
    start = time.time()

    # Pre-compute Hammersley sequence for all samples.
    sample_indices = np.arange(NUM_SAMPLES, dtype=np.uint32)
    xi1_all = sample_indices.astype(np.float64) / NUM_SAMPLES
    xi2_all = radical_inverse_vdc(sample_indices)

    result_scale = np.zeros((SIZE, SIZE), dtype=np.float64)
    result_bias = np.zeros((SIZE, SIZE), dtype=np.float64)

    for y in range(SIZE):
        if y % 32 == 0:
            elapsed = time.time() - start
            print(f"  Row {y}/{SIZE} ({100*y//SIZE}%) [{elapsed:.1f}s]", file=sys.stderr)

        roughness = (y + 1) / SIZE

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