139 lines
4.1 KiB
Python
139 lines
4.1 KiB
Python
from math import floor
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from minecraft.networking.packets import Packet, PacketBuffer
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from minecraft.networking.types import (
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VarInt, Integer, Boolean, UnsignedByte, Long, Short,
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multi_attribute_alias, Vector, UnsignedLong
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)
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from ....types import nbt
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class ChunkDataPacket(Packet):
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id = 0x20
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packet_name = 'chunk data'
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fields = 'x', 'bit_mask_y', 'z', 'full_chunk'
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def read(self, file_object):
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print('reading chunk')
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self.x = Integer.read(file_object)
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self.z = Integer.read(file_object)
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self.full_chunk = Boolean.read(file_object)
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self.bit_mask_y = VarInt.read(file_object)
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self.heightmaps = Nbt.read(file_object)
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self.biomes = []
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if self.full_chunk:
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biomes_length = VarInt.read(file_object)
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for i in range(biomes_length):
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self.biomes.append(Integer.read(file_object))
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size = VarInt.read(file_object)
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self.data = file_object.read(size)
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size_entities = VarInt.read(file_object)
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self.entities = []
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for i in range(size_entities):
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self.entities.append(Nbt.read(file_object))
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self.decode_chunk_data()
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def write_fields(self, packet_buffer):
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Integer.send(self.x, packet_buffer)
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Integer.send(self.z, packet_buffer)
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Boolean.send(self.full_chunk, packet_buffer)
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VarInt.send(self.bit_mask_y, packet_buffer)
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Nbt.send(self.heightmaps, packet_buffer)
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if self.full_chunk:
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for i in range(1024):
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Integer.send(self.biomes[i], packet_buffer)
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VarInt.send(len(self.data), packet_buffer)
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packet_buffer.send(self.data)
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VarInt.send(len(self.entities), packet_buffer)
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for e in self.entities:
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Nbt.send(e, packet_buffer)
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def decode_chunk_data(self):
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packet_data = PacketBuffer()
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packet_data.send(self.data)
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packet_data.reset_cursor()
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self.chunks = {}
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for i in range(16): #0-15
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self.chunks[i] = Chunk(self.x, i, self.z)
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if self.bit_mask_y & (1 << i):
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self.chunks[i].read(packet_data)
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for e in self.entities:
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y = e['y']
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self.chunks[floor(y/16)].entities.append(e)
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class Chunk:
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position = multi_attribute_alias(Vector, 'x', 'y', 'z')
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def __init__(self, x, y, z, empty=True):
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self.x = x
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self.y = y
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self.z = z
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self.empty = empty
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self.entities = []
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def __repr__(self):
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return 'Chunk(%r, %r, %r)' % (self.x, self.y, self.z)
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def read(self, file_object):
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self.empty = False
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self.block_count = Short.read(file_object)
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self.bpb = UnsignedByte.read(file_object)
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if self.bpb <= 4:
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self.bpb = 4
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if self.bpb <= 8: # Indirect palette
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self.palette = []
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size = VarInt.read(file_object)
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for i in range(size):
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self.palette.append(VarInt.read(file_object))
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else: # Direct palette
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self.palette = None
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size = VarInt.read(file_object)
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longs = []
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for i in range(size):
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longs.append(UnsignedLong.read(file_object))
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self.blocks = []
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mask = (1 << self.bpb)-1
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for i in range(4096):
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l1 = int((i*self.bpb)/64)
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offset = (i*self.bpb)%64
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l2 = int(((i+1)*self.bpb-1)/64)
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n = longs[l1] >> offset
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if l2>l1:
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n |= longs[l2] << (64-offset)
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n &= mask
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if self.palette:
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n = self.palette[n]
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self.blocks.append(n)
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def write_fields(self, packet_buffer):
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pass # TODO
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def get_block_at(self, x, y, z):
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if self.empty:
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return 0
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return self.blocks[x+y*256+z*16]
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def set_block_at(self, x, y, z, block):
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if self.empty:
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self.init_empty()
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self.blocks[x+y*256+z*16] = block
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def init_empty(self):
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self.blocks = []
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for i in range(4096):
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self.blocks.append(0)
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self.empty = False
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@property
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def origin(self):
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return self.position*16
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