minecraft-bot/protocol/packets.py

220 lines
5.8 KiB
Python

from math import floor
from minecraft.networking.packets import Packet, PacketBuffer
from minecraft.networking.types import (
VarInt, Integer, UnsignedByte, Position, Vector, MutableRecord,
attribute_alias, multi_attribute_alias, Long, Boolean, VarLong,
Short, UnsignedLong, Byte, BlockFace,
)
from protocol.types import Nbt, Slot
class ChunkDataPacket(Packet):
id = 0x20
packet_name = 'chunk data'
fields = 'x', 'bit_mask_y', 'z', 'full_chunk'
def read(self, file_object):
self.x = Integer.read(file_object)
self.z = Integer.read(file_object)
self.full_chunk = Boolean.read(file_object)
self.bit_mask_y = VarInt.read(file_object)
self.heightmaps = Nbt.read(file_object)
self.biomes = []
if self.full_chunk:
biomes_length = VarInt.read(file_object)
for i in range(biomes_length):
self.biomes.append(VarInt.read(file_object))
size = VarInt.read(file_object)
self.data = file_object.read(size)
size_entities = VarInt.read(file_object)
self.entities = []
for i in range(size_entities):
self.entities.append(Nbt.read(file_object))
self.decode_chunk_data()
def write_fields(self, packet_buffer):
Integer.send(self.x, packet_buffer)
Integer.send(self.z, packet_buffer)
Boolean.send(self.full_chunk, packet_buffer)
VarInt.send(self.bit_mask_y, packet_buffer)
Nbt.send(self.heightmaps, packet_buffer)
if self.full_chunk:
for i in range(1024):
Integer.send(self.biomes[i], packet_buffer)
VarInt.send(len(self.data), packet_buffer)
packet_buffer.send(self.data)
VarInt.send(len(self.entities), packet_buffer)
for e in self.entities:
Nbt.send(e, packet_buffer)
def decode_chunk_data(self):
packet_data = PacketBuffer()
packet_data.send(self.data)
packet_data.reset_cursor()
self.chunks = {}
for i in range(16): #0-15
self.chunks[i] = Chunk(self.x, i, self.z)
if self.bit_mask_y & (1 << i):
self.chunks[i].read(packet_data)
for e in self.entities:
y = e['y']
self.chunks[floor(y/16)].entities.append(e)
class Chunk:
position = multi_attribute_alias(Vector, 'x', 'y', 'z')
def __init__(self, x, y, z, empty=True):
self.x = x
self.y = y
self.z = z
self.empty = empty
self.entities = []
def __repr__(self):
return 'Chunk(%r, %r, %r)' % (self.x, self.y, self.z)
def read(self, file_object):
self.empty = False
self.block_count = Short.read(file_object)
self.bpb = UnsignedByte.read(file_object)
if self.bpb <= 4:
self.bpb = 4
if self.bpb <= 8: # Indirect palette
self.palette = []
size = VarInt.read(file_object)
for i in range(size):
self.palette.append(VarInt.read(file_object))
else: # Direct palette
self.palette = None
size = VarInt.read(file_object)
longs = []
for i in range(size):
longs.append(UnsignedLong.read(file_object))
self.blocks = []
mask = (1 << self.bpb)-1
bits_used = int(64 / self.bpb) * self.bpb
for i in range(4096):
l1 = int((i*self.bpb)/bits_used)
offset = (i*self.bpb)%bits_used
n = longs[l1] >> offset
n &= mask
if self.palette:
n = self.palette[n]
self.blocks.append(n)
def write_fields(self, packet_buffer):
pass # TODO
def get_block_at(self, x, y, z):
if self.empty:
return 0
return self.blocks[x+y*256+z*16]
def set_block_at(self, x, y, z, block):
if self.empty:
self.init_empty()
self.blocks[x+y*256+z*16] = block
def init_empty(self):
self.blocks = []
for i in range(4096):
self.blocks.append(0)
self.empty = False
@property
def origin(self):
return self.position*16
class AcknowledgePlayerDiggingPacket(Packet):
id = 0x07
packet_name = 'acknowledge player digging'
definition = [
{'location': Position},
{'block': VarInt},
{'status': VarInt},
{'successful': Boolean},
]
class BlockBreakAnimationPacket(Packet):
id = 0x08
packet_name = 'block break animation'
definition = [
{'entity_id': VarInt},
{'location': Position},
{'destroy_stage': Byte},
]
class SetSlotPacket(Packet):
id = 0x15
packet_name = 'set slot'
definition = [
{'window_id': Byte},
{'slot': Short},
{'slot_data': Slot},
]
class TimeUpdatePacket(Packet):
id = 0x4E
packet_name = 'time update'
definition = [
{'world_age': Long},
{'time_of_day': Long},
]
class PlayerDiggingPacket(Packet):
# used when player mines / breaks blocks
# https://wiki.vg/Protocol#Player_Digging
id = 0x1B
packet_name = 'player digging'
definition = [
{'status': VarInt},
{'location': Position},
{'face': VarInt},
]
STARTED = 0
CANCELLED = 1
FINISHED = 2
# PlayerBlockPlacementPacket.Face is an alias for BlockFace.
Face = BlockFace
class PickItemPacket(Packet):
# used when player picks item (middle click)
# https://wiki.vg/Protocol#Pick_Item
id = 0x18
packet_name = 'pick item'
definition = [
{'slot_to_use': VarInt},
]
class HeldItemChangePacket(Packet):
# Sent when the player changes the slot selection
# https://wiki.vg/Protocol#Held_Item_Change_.28serverbound.29
id = 0x25
packet_name = 'held item change'
definition = [
{'slot': Short},
]