def convert(input_filename):
    with open(input_filename, "r") as f:
        lines = [line.strip() for line in f if line.strip()]

    # --- Step 1: Parse header ---
    idx = 0
    _ignored = int(lines[idx])  # First line, ignored
    idx += 1

    num_vertices = int(lines[idx])
    idx += 1

    # --- Step 2: Extract vertex data ---
    vertices = []
    for _ in range(num_vertices):
        # Each vertex: x y z u v nx ny nz (8 numbers)
        vertex = [lines[idx + i] for i in range(8)]
        vertices.append(vertex)
        idx += 8

    # --- Step 3: Write mesh.txt ---
    with open("mesh.txt", "w") as mesh_file:
        mesh_file.write(str(num_vertices) + "\n")
        for v in vertices:
            for comp in v:
                mesh_file.write(comp + "\n")

    # --- Step 4: Parse texture ---
    width = int(lines[idx]); idx += 1
    height = int(lines[idx]); idx += 1

    num_pixels = width * height
    pixels = []
    for _ in range(num_pixels):
        r = int(lines[idx]); idx += 1
        g = int(lines[idx]); idx += 1
        b = int(lines[idx]); idx += 1
        pixels.append((r, g, b))

    # --- Step 5: Write texture.bin ---
    with open("texture.bin", "wb") as tex_file:
        for r, g, b in pixels:
            tex_file.write(bytes([r, g, b]))


if __name__ == "__main__":
    import sys
    if len(sys.argv) != 2:
        print(f"Usage: {sys.argv[0]} <input_file>")
    else:
        convert(sys.argv[1])