Function pick_variant

map.py:248–253

(tiles: dict[str, list[Image.Image]], t: str, seed: int, r: int, c: int)

def pick_variant(tiles: dict[str, list[Image.Image]], t: str, seed: int, r: int, c: int) -> Image.Image:
    arr = tiles.get(t) or tiles.get("grass") or []
    if not arr:
        raise SystemExit("No usable tiles found in Tiles folder.")
    h = hashlib.blake2b(f"{seed}|{t}|{r}|{c}".encode("utf-8"), digest_size=8).digest()
    return arr[int.from_bytes(h, "little") % len(arr)]


def normalize01(a: np.ndarray) -> np.ndarray: