113 lines
3.8 KiB
Python
113 lines
3.8 KiB
Python
from minecraft.networking.packets import Packet
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from minecraft.networking.types import (
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VarInt, Integer, UnsignedByte, Position, Vector, MutableRecord,
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attribute_alias, multi_attribute_alias, Long, Boolean, VarLong,
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)
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class BlockChangePacket(Packet):
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id = 0x0B
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packet_name = 'block change'
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definition = [
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{'location': Position},
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{'block_state_id': VarInt}]
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block_state_id = 0
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# For protocols < 347: an accessor for (block_state_id >> 4).
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@property
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def blockId(self):
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return self.block_state_id >> 4
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@blockId.setter
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def blockId(self, block_id):
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self.block_state_id = (self.block_state_id & 0xF) | (block_id << 4)
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# For protocols < 347: an accessor for (block_state_id & 0xF).
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@property
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def blockMeta(self):
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return self.block_state_id & 0xF
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@blockMeta.setter
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def blockMeta(self, meta):
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self.block_state_id = (self.block_state_id & ~0xF) | (meta & 0xF)
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# This alias is retained for backward compatibility.
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blockStateId = attribute_alias('block_state_id')
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class MultiBlockChangePacket(Packet):
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id = 0x3B
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packet_name = 'multi block change'
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fields = 'chunk_x', 'chunk_z', 'records'
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# Access the 'chunk_x' and 'chunk_z' fields as a tuple.
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chunk_pos = multi_attribute_alias(tuple, 'chunk_x', 'chunk_z')
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class Record(MutableRecord):
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__slots__ = 'x', 'y', 'z', 'block_state_id', 'location'
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def __init__(self, **kwds):
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self.block_state_id = 0
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super(MultiBlockChangePacket.Record, self).__init__(**kwds)
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# Access the 'x', 'y', 'z' fields as a Vector of ints.
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position = multi_attribute_alias(Vector, 'x', 'y', 'z')
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# For protocols < 347: an accessor for (block_state_id >> 4).
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@property
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def blockId(self):
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return self.block_state_id >> 4
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@blockId.setter
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def blockId(self, block_id):
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self.block_state_id = self.block_state_id & 0xF | block_id << 4
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# For protocols < 347: an accessor for (block_state_id & 0xF).
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@property
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def blockMeta(self):
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return self.block_state_id & 0xF
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@blockMeta.setter
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def blockMeta(self, meta):
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self.block_state_id = self.block_state_id & ~0xF | meta & 0xF
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# This alias is retained for backward compatibility.
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blockStateId = attribute_alias('block_state_id')
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def read(self, file_object, parent):
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data = VarLong.read(file_object)
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self.block_state_id = int(data >> 12)
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self.x = int(data >> 8 & 0xf)
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self.z = int(data >> 4 & 0xf)
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self.y = int(data & 0xf)
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# Absolute position in world to be compatible with BlockChangePacket
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self.location = Vector(self.position.x + parent.chunk_x*16, self.position.y, self.position.z + parent.chunk_z*16)
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def write(self, packet_buffer):
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raise
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UnsignedByte.send(self.x << 4 | self.z & 0xF, packet_buffer)
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UnsignedByte.send(self.y, packet_buffer)
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VarInt.send(self.block_state_id, packet_buffer)
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def read(self, file_object):
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coords = Long.read(file_object)
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self.chunk_x = int(coords >> 42 & 0x3fffff)
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self.chunk_z = int(coords >> 20 & 0x3fffff)
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self.chunk_y = int(coords & 0xfffff)
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self.unknown = Boolean.read(file_object)
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array_size = VarInt.read(file_object)
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self.records = []
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for i in range(array_size):
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record = self.Record()
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record.read(file_object, self)
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self.records.append(record)
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def write_fields(self, packet_buffer):
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raise
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Integer.send(self.chunk_x, packet_buffer)
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Integer.send(self.chunk_z, packet_buffer)
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VarInt.send(len(self.records), packet_buffer)
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for record in self.records:
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record.write(packet_buffer)
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