implemented 1.12.2 format, sorta
still broken but it's progress!
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b0b0e2dcfa
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0ef56df704
1 changed files with 86 additions and 45 deletions
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@ -1,17 +1,19 @@
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import io
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import math
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import logging
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from typing import Dict, Tuple, Any
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import numpy as np
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from aiocraft.mc.types import VarInt, Short, UnsignedByte, Type
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from aiocraft.mc.types import VarInt, Short, UnsignedByte, Type, Context
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class BitStream:
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data : bytes
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cursor : int
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size : int
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def __init__(self, data:bytes, size:int=-1):
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def __init__(self, data:bytes, size:int):
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self.data = data
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self.cursor = 0
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self.size = size if size > 0 else len(self.data) * 8
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@ -21,95 +23,134 @@ class BitStream:
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def read(self, size:int) -> int:
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if len(self) < size:
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raise ValueError("Not enough bits")
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aligned_size = (size//8)+1
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raise ValueError(f"Not enough bits ({len(self)} left, {size} requested)")
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start_byte = (self.cursor//8)
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end_byte = math.ceil((self.cursor + size) / 8) + 1
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buf = int.from_bytes(
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self.data[self.cursor:aligned_size],
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self.data[start_byte:end_byte],
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byteorder='little', signed=False
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)
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cut_right = 8 - ((self.cursor + size) % 8)
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self.cursor += size
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delta = aligned_size - size
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return ( buf << delta ) >> delta
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return ( buf >> cut_right ) & ( 0xFF >> (8 - (size%8)))
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class PalettedContainer(Type):
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pytype : type
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threshold : int
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maxsize : int
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size : int
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def __init__(self, threshold:int, maxsize:int):
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def __init__(self, threshold:int, size:int):
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self.threshold = threshold
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self.maxsize = maxsize
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self.size = size
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def write(self, data, buffer:io.BytesIO, ctx:object=None):
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def write(self, data, buffer:io.BytesIO, ctx:Context):
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raise NotImplementedError
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def read(self, buffer:io.BytesIO, ctx:object=None):
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bits = UnsignedByte.read(buffer, ctx=ctx)
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def read(self, buffer:io.BytesIO, ctx:Context):
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bits = max(UnsignedByte.read(buffer, ctx=ctx), 4)
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if bits > 13:
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raise ValueError("Bits Per Bit too high : %d", bits)
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palette = np.empty((0,), dtype='int32')
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if bits == 0:
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value = VarInt.read(buffer, ctx=ctx)
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elif bits < self.threshold:
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palette_len = VarInt.read(buffer, ctx=ctx)
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if bits == 0:
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value = palette_len
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elif bits < self.threshold:
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palette = np.zeros((palette_len,), dtype='int32')
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for i in range(palette_len):
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palette[i] = VarInt.read(buffer)
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palette[i] = VarInt.read(buffer, ctx=ctx)
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size = VarInt.read(buffer, ctx=ctx)
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stream = BitStream(buffer.read(size * 8))
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section = np.zeros((self.maxsize,), dtype='int32')
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stream = BitStream(buffer.read(size * 8), size*8*8) # a Long is 64 bits long
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section = np.zeros((self.size, self.size, self.size), dtype='int32')
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index = 0
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while index < self.maxsize and len(stream) > 0:
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for y in range(self.size):
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for z in range(self.size):
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for x in range(self.size):
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val = stream.read(bits) if bits > 0 else value
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section[index] = palette[val] if bits < self.threshold and bits > 0 else val
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index+=1
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if bits < self.threshold and bits > 0 and val > len(palette):
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logging.warning("Expected index %d in palette of size %d", val, len(palette))
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section[x][y][z] = palette[val] if bits < self.threshold and bits > 0 and val < len(palette) else val
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return section
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BiomeContainer = PalettedContainer(4, 64)
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BlockStateContainer = PalettedContainer(9, 4096)
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BiomeContainer = PalettedContainer(4, 4)
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BlockStateContainer = PalettedContainer(9, 16)
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class ChunkSectionType(Type):
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class NewChunkSectionType(Type):
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pytype : type
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def write(self, data, buffer:io.BytesIO, ctx:object=None):
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def write(self, data, buffer:io.BytesIO, ctx:Context):
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raise NotImplementedError
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def read(self, buffer:io.BytesIO, ctx:object=None):
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block_count = Short.read(buffer)
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block_states = BlockStateContainer.read(buffer)
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biomes = BiomeContainer.read(buffer)
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def read(self, buffer:io.BytesIO, ctx:Context):
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block_count = Short.read(buffer, ctx=ctx)
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block_states = BlockStateContainer.read(buffer, ctx=ctx)
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biomes = BiomeContainer.read(buffer, ctx=ctx)
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return (
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block_count,
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block_states.reshape((16, 16, 16)),
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biomes.reshape((4, 4, 4))
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block_states,
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biomes
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)
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ChunkSection = ChunkSectionType()
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class OldChunkSectionType(Type):
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pytype : type
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def write(self, data, buffer:io.BytesIO, ctx:Context):
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raise NotImplementedError
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def read(self, buffer:io.BytesIO, ctx:Context):
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section = BlockStateContainer.read(buffer, ctx=ctx)
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block_light = np.empty((16, 16, 16), dtype='int32')
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block_light_buffer = BitStream(buffer.read(2048), 2048*8)
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for y in range(16):
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for z in range(16):
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for x in range(16):
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block_light[x][y][z] = block_light_buffer.read(4)
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sky_light = np.empty((16, 16, 16), dtype='int32')
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if ctx.overworld:
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sky_light_buffer = BitStream(buffer.read(2048), 2048*8)
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for y in range(16):
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for z in range(16):
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for x in range(16):
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sky_light[x][y][z] = sky_light_buffer.read(4)
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return (
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section,
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block_light,
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sky_light
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)
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ChunkSection = OldChunkSectionType()
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class Chunk(Type):
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x : int
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z : int
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bitmask : int
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ground_up_continuous : bool
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blocks : np.ndarray
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biomes : np.ndarray
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block_count : int
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block_light : np.ndarray
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sky_light : np.ndarray
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biomes: bytes
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def __init__(self, x:int, z:int, bitmask:int):
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def __init__(self, x:int, z:int, bitmask:int, ground_up_continuous:bool):
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self.x = x
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self.z = z
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self.bitmask = bitmask
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self.blocks = np.zeros((16, 256, 16))
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self.biomes = np.zeros((4, 64, 4))
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self.block_count = 0
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self.block_light = np.zeros((16, 256, 16))
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self.sky_light = np.zeros((16, 256, 16))
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self.ground_up_continuous = ground_up_continuous
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def __getitem__(self, item:Any):
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return self.blocks[item]
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def read(self, buffer:io.BytesIO, ctx:object=None):
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def read(self, buffer:io.BytesIO, ctx:Context):
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for i in range(16):
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if (self.bitmask >> i) & 1:
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block_count, block_states, biomes = ChunkSection.read(buffer)
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self.block_count += block_count
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self.blocks[:, i*16 : (i+1)*16, :] = block_states
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self.biomes[:, i*4 : (i+1)*4, :] = biomes
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section, block_light, sky_light = ChunkSection.read(buffer, ctx=ctx)
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self.blocks[:, i*16 : (i+1)*16, :] = section
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self.block_light[:, i*16 : (i+1)*16, :] = block_light
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self.sky_light[:, i*16 : (i+1)*16, :] = sky_light
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if self.ground_up_continuous:
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self.biomes = buffer.read(256)
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return self
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class World:
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@ -121,11 +162,11 @@ class World:
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def __getitem__(self, item:Tuple[int, int, int]):
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return self.get(*item)
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def get(self, x:int, y:int, z:int):
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def get(self, x:int, y:int, z:int) -> int:
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coord = (x//16, z//16)
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if coord not in self.chunks:
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raise KeyError(f"Chunk {coord} not loaded")
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return self.chunks[coord][x%16, y, z%16]
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return self.chunks[coord][int(x%16), int(y), int(z%16)]
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def put(self, chunk:Chunk, x:int, z:int):
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self.chunks[(x,z)] = chunk
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