def position_look(self, container):
oldx, chaff, oldz, chaff = split_coords(self.player.location.x,
self.player.location.z)
self.player.location.load_from_packet(container)
pos = (self.player.location.x, self.player.location.y,
self.player.location.z)
x, chaff, z, chaff = split_coords(pos[0], pos[2])
if oldx != x or oldz != z:
self.update_chunks()
for entity in self.factory.entities_near(pos[0] * 32,
self.player.location.y * 32, pos[2] * 32, 64):
packet = make_packet("pickup", type=entity.entity_type,
quantity=entity.quantity, wear=0)
self.transport.write(packet)
packet = make_packet("destroy", id=entity.id)
self.transport.write(packet)
self.factory.destroy_entity(entity)
def digging(self, container):
if container.state != 3:
return
bigx, smallx, bigz, smallz = split_coords(container.x, container.z)
try:
chunk = self.chunks[bigx, bigz]
except KeyError:
self.error("Couldn't dig in chunk (%d, %d)!" % (bigx, bigz))
return
# XXX something to consider: All of this handler's functionality is
# based on the chunk, the coords, and the block type, which means that
# it could all be implemented as IDigHooks. Hmm....
oldblock = chunk.get_block((smallx, container.y, smallz))
newblock = blocks[oldblock].replace
chunk.set_block((smallx, container.y, smallz), newblock)
dropblock = blocks[oldblock].drop
if dropblock != 0:
coords = (container.x * 32 + 16, container.y * 32,
container.z * 32 + 16)
self.factory.give(coords, dropblock, 1)
for hook in self.dig_hooks:
hook.dig_hook(chunk, smallx, container.y, smallz, oldblock)
if chunk.is_damaged():
packet = chunk.get_damage_packet()
self.factory.broadcast_for_chunk(packet, bigx, bigz)
chunk.clear_damage()
def send_initial_chunk_and_location(self):
bigx, smallx, bigz, smallz = split_coords(self.player.location.x,
self.player.location.z)
self.enable_chunk(bigx, bigz)
chunk = self.chunks[bigx, bigz]
# This may not play well with recent Alpha clients, which have an
# unfortunate bug at maximum heights. We have yet to ascertain whether
# the bug is server-side or client-side.
height = chunk.height_at(smallx, smallz) + 2
self.player.location.y = height
packet = self.player.location.save_to_packet()
self.transport.write(packet)
def build(self, container):
# Ignore clients that think -1 is placeable.
if container.block == 65535:
return
x = container.x
y = container.y
z = container.z
# Special case when face is -1: Update the status of the currently
# held block rather than placing a new block.
if container.face == -1:
return
# Offset coords according to face.
if container.face == 0:
y -= 1
elif container.face == 1:
y += 1
elif container.face == 2:
z -= 1
elif container.face == 3:
z += 1
elif container.face == 4:
x -= 1
elif container.face == 5:
x += 1
bigx, smallx, bigz, smallz = split_coords(x, z)
try:
chunk = self.chunks[bigx, bigz]
except KeyError:
self.error("Couldn't build in chunk (%d, %d)!" % (bigx, bigz))
return
chunk.set_block((smallx, y, smallz), container.block)
if chunk.is_damaged():
packet = chunk.get_damage_packet()
self.factory.broadcast_for_chunk(packet, bigx, bigz)
chunk.clear_damage()
def update_chunks(self):
print "Sending chunks..."
x, chaff, z, chaff = split_coords(self.player.location.x,
self.player.location.z)
new = set(product(xrange(x - 10, x + 10), xrange(z - 10, z + 10)))
old = set(self.chunks.iterkeys())
added = new - old
discarded = old - new
# Perhaps some explanation is in order.
# The generator expressions are stored in the protocol instance. If we
# need to cancel them, we can call their close() method, which causes
# them to become inert. This is incredibly important because we want
# to cancel all previously pending chunk changes when a new set of
# chunk changes is requested.
# The coiterate() function iterates over the iterable it is fed,
# without tying up the reactor, by yielding after each iteration. The
# inner part of the generator expression generates all of the chunks
# around the currently needed chunk, and it sorts them by distance to
# the current chunk. The end result is that we load chunks one-by-one,
# nearest to furthest, without stalling other clients.
if self.chunk_generators:
for generator in self.chunk_generators:
generator.close()
self.chunk_generators = [
(
self.enable_chunk(i, j) for i, j in
sorted(added, key=lambda t: (t[0] - x)**2 + (t[1] - z)**2)
),
(self.disable_chunk(i, j) for i, j in discarded)
]
for generator in self.chunk_generators:
coiterate(generator)