minecraft-bot/custom/networking/packets/clientbound/play/block_change_packet.py

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from minecraft.networking.packets import Packet
from minecraft.networking.types import (
VarInt, Integer, UnsignedByte, Position, Vector, MutableRecord,
attribute_alias, multi_attribute_alias,
)
class BlockChangePacket(Packet):
@staticmethod
def get_id(context):
return 0x0C if context.protocol_version >= 550 else \
0x0B if context.protocol_version >= 332 else \
0x0C if context.protocol_version >= 318 else \
0x0B if context.protocol_version >= 67 else \
0x24 if context.protocol_version >= 62 else \
0x23
packet_name = 'block change'
definition = [
{'location': Position},
{'block_state_id': VarInt}]
block_state_id = 0
# For protocols < 347: an accessor for (block_state_id >> 4).
@property
def blockId(self):
return self.block_state_id >> 4
@blockId.setter
def blockId(self, block_id):
self.block_state_id = (self.block_state_id & 0xF) | (block_id << 4)
# For protocols < 347: an accessor for (block_state_id & 0xF).
@property
def blockMeta(self):
return self.block_state_id & 0xF
@blockMeta.setter
def blockMeta(self, meta):
self.block_state_id = (self.block_state_id & ~0xF) | (meta & 0xF)
# This alias is retained for backward compatibility.
blockStateId = attribute_alias('block_state_id')
class MultiBlockChangePacket(Packet):
@staticmethod
def get_id(context):
return 0x10 if context.protocol_version >= 550 else \
0x0F if context.protocol_version >= 343 else \
0x10 if context.protocol_version >= 332 else \
0x11 if context.protocol_version >= 318 else \
0x10 if context.protocol_version >= 67 else \
0x22
packet_name = 'multi block change'
fields = 'chunk_x', 'chunk_z', 'records'
# Access the 'chunk_x' and 'chunk_z' fields as a tuple.
chunk_pos = multi_attribute_alias(tuple, 'chunk_x', 'chunk_z')
class Record(MutableRecord):
__slots__ = 'x', 'y', 'z', 'block_state_id', 'location'
def __init__(self, **kwds):
self.block_state_id = 0
super(MultiBlockChangePacket.Record, self).__init__(**kwds)
# Access the 'x', 'y', 'z' fields as a Vector of ints.
position = multi_attribute_alias(Vector, 'x', 'y', 'z')
# For protocols < 347: an accessor for (block_state_id >> 4).
@property
def blockId(self):
return self.block_state_id >> 4
@blockId.setter
def blockId(self, block_id):
self.block_state_id = self.block_state_id & 0xF | block_id << 4
# For protocols < 347: an accessor for (block_state_id & 0xF).
@property
def blockMeta(self):
return self.block_state_id & 0xF
@blockMeta.setter
def blockMeta(self, meta):
self.block_state_id = self.block_state_id & ~0xF | meta & 0xF
# This alias is retained for backward compatibility.
blockStateId = attribute_alias('block_state_id')
def read(self, file_object, parent):
h_position = UnsignedByte.read(file_object)
self.x, self.z = h_position >> 4, h_position & 0xF
self.y = UnsignedByte.read(file_object)
self.block_state_id = VarInt.read(file_object)
# Absolute position in world to be compatible with BlockChangePacket
self.location = Vector(self.position.x + parent.chunk_x*16, self.position.y, self.position.z + parent.chunk_z*16)
def write(self, packet_buffer):
UnsignedByte.send(self.x << 4 | self.z & 0xF, packet_buffer)
UnsignedByte.send(self.y, packet_buffer)
VarInt.send(self.block_state_id, packet_buffer)
def read(self, file_object):
self.chunk_x = Integer.read(file_object)
self.chunk_z = Integer.read(file_object)
records_count = VarInt.read(file_object)
self.records = []
for i in range(records_count):
record = self.Record()
record.read(file_object, self)
self.records.append(record)
def write_fields(self, packet_buffer):
Integer.send(self.chunk_x, packet_buffer)
Integer.send(self.chunk_z, packet_buffer)
VarInt.send(len(self.records), packet_buffer)
for record in self.records:
record.write(packet_buffer)