def __init__(self, db, x, z, y):
self.dirty = False
self.x = x
self.z = z
self.y = y
if db is not None: # For creating subchunks, there will be no DB.
# Subchunks are stored as base key + subchunk key `/` + subchunk id (y level // 16)
key = struct.pack("<iicB", x, z, b'/', y)
data = ldb.get(db, key)
self.version, data = data[0], data[1:]
if self.version != 8:
raise NotImplementedError("Unsupported subchunk version {} at {} {}/{}".format(self.version, x, z, y))
numStorages, data = data[0], data[1:]
self.blocks = []
for i in range(numStorages):
blocks, data = self._loadBlocks(data)
palette, data = self._loadPalette(data)
self.blocks.append(np.empty(4096, dtype=Block)) # Prepare with correct dtype
for j, block in enumerate(blocks):
block = palette[block]
self.blocks[i][j] = Block(block["name"].payload, block["val"].payload) # .payload to get actual val
self.blocks[i] = self.blocks[i].reshape(16, 16, 16).swapaxes(1, 2) # Y and Z saved in an inverted order
def _loadVersion(self, db):
try:
version = ldb.get(db, self.keyBase + b"v")
version = struct.unpack("<B", version)[0]
if version not in [10, 13, 14]:
raise NotImplementedError("Unexpected chunk version {} at chunk {} {}.".format(version, self.x, self.z))
except KeyError:
raise KeyError("Chunk at {}, {} does not exist.".format(self.x, self.z))
return version
def _loadEntities(self, db):
try:
data = ldb.get(db, self.keyBase + b"2")
except KeyError:
return []
data = nbt.DataReader(data)
entities = []
while not data.finished():
entities.append(nbt.decode(data))
return entities
def _loadTileEntities(self, db):
try:
data = ldb.get(db, self.keyBase + b"1")
except KeyError:
return
data = nbt.DataReader(data)
while not data.finished():
nbtData = nbt.decode(data)
x = nbtData.pop("x").payload # We add back theses with the correct value on save, they are important.
y = nbtData.pop("y").payload
z = nbtData.pop("z").payload
self.getBlock(x % 16, y, z % 16).nbt = nbtData
def _load2D(self, db):
data = ldb.get(db, self.keyBase + b'-')
heightMap = struct.unpack("<" + "H" * 16 * 16, data[:2 * 16 * 16])
biomes = struct.unpack("B" * 16 * 16, data[2 * 16 * 16:])
return heightMap, biomes