def _load_chunk_from_tag(self, chunk, tag):
"""
Load a chunk from a tag.
We cannot instantiate chunks, ever, so pass it in from above.
"""
level = tag["Level"]
# These fromstring() calls are designed to raise if there are any
# issues, but still be speedy.
# Loop through the sections and unpack anything that we find.
for tag in level["Sections"].tags:
index = tag["Y"].value
section = Section()
section.blocks = array("B")
section.blocks.fromstring(tag["Blocks"].value)
section.metadata = array("B", unpack_nibbles(tag["Data"].value))
section.skylight = array("B",
unpack_nibbles(tag["SkyLight"].value))
chunk.sections[index] = section
chunk.heightmap = array("B")
chunk.heightmap.fromstring(level["HeightMap"].value)
chunk.blocklight = array("B",
unpack_nibbles(level["BlockLight"].value))
chunk.populated = bool(level["TerrainPopulated"])
if "Entities" in level:
for tag in level["Entities"].tags:
try:
entity = self._load_entity_from_tag(tag)
chunk.entities.add(entity)
except KeyError:
log.msg("Unknown entity %s" % tag["id"].value)
log.msg("Tag for entity:")
log.msg(tag.pretty_tree())
if "TileEntities" in level:
for tag in level["TileEntities"].tags:
try:
tile = self._load_tile_from_tag(tag)
chunk.tiles[tile.x, tile.y, tile.z] = tile
except KeyError:
log.msg("Unknown tile entity %s" % tag["id"].value)
log.msg("Tag for tile:")
log.msg(tag.pretty_tree())
chunk.dirty = not chunk.populated
def _load_chunk_from_tag(self, chunk, tag):
"""
Load a chunk from a tag.
We cannot instantiate chunks, ever, so pass it in from above.
"""
level = tag["Level"]
# These fromstring() calls are designed to raise if there are any
# issues, but still be speedy.
# Loop through the sections and unpack anything that we find.
for tag in level["Sections"].tags:
index = tag["Y"].value
section = Section()
section.blocks = array("B")
section.blocks.fromstring(tag["Blocks"].value)
section.metadata = array("B", unpack_nibbles(tag["Data"].value))
section.skylight = array("B",
unpack_nibbles(tag["SkyLight"].value))
chunk.sections[index] = section
chunk.heightmap = array("B")
chunk.heightmap.fromstring(level["HeightMap"].value)
chunk.blocklight = array("B",
unpack_nibbles(level["BlockLight"].value))
chunk.populated = bool(level["TerrainPopulated"])
if "Entities" in level:
for tag in level["Entities"].tags:
try:
entity = self._load_entity_from_tag(tag)
chunk.entities.add(entity)
except KeyError:
log.msg("Unknown entity %s" % tag["id"].value)
log.msg("Tag for entity:")
log.msg(tag.pretty_tree())
if "TileEntities" in level:
for tag in level["TileEntities"].tags:
try:
tile = self._load_tile_from_tag(tag)
chunk.tiles[tile.x, tile.y, tile.z] = tile
except KeyError:
log.msg("Unknown tile entity %s" % tag["id"].value)
log.msg("Tag for tile:")
log.msg(tag.pretty_tree())
chunk.dirty = not chunk.populated
def __init__(self, x, z):
"""
:param int x: X coordinate in chunk coords
:param int z: Z coordinate in chunk coords
:ivar array.array heightmap: Tracks the tallest block in each xz-column.
:ivar bool all_damaged: Flag for forcing the entire chunk to be
damaged. This is for efficiency; past a certain point, it is not
efficient to batch block updates or track damage. Heavily damaged
chunks have their damage represented as a complete resend of the
entire chunk.
"""
self.x = int(x)
self.z = int(z)
self.heightmap = array("B", [0] * (16 * 16))
self.blocklight = array("B", [0] * (16 * 16 * CHUNK_HEIGHT))
self.sections = [Section() for i in range(16)]
self.entities = set()
self.tiles = {}
self.damaged = set()
class TestSectionInternals(TestCase):
def setUp(self):
self.s = Section()
def test_set_block(self):
"""
``set_block`` correctly alters the internal array.
"""
self.s.set_block((0, 0, 0), 1)
self.assertEqual(self.s.blocks[0], 1)
def test_set_block_xyz_xzy(self):
"""
``set_block`` swizzles into the internal array correctly.
"""
self.s.set_block((1, 0, 0), 1)
self.s.set_block((0, 1, 0), 2)
self.s.set_block((0, 0, 1), 3)
self.assertEqual(self.s.blocks[1], 1)
self.assertEqual(self.s.blocks[256], 2)
self.assertEqual(self.s.blocks[16], 3)
class TestSectionInternals(TestCase):
def setUp(self):
self.s = Section()
def test_set_block(self):
"""
``set_block`` correctly alters the internal array.
"""
self.s.set_block((0, 0, 0), 1)
self.assertEqual(self.s.blocks[0], 1)
def test_set_block_xyz_xzy(self):
"""
``set_block`` swizzles into the internal array correctly.
"""
self.s.set_block((1, 0, 0), 1)
self.s.set_block((0, 1, 0), 2)
self.s.set_block((0, 0, 1), 3)
self.assertEqual(self.s.blocks[1], 1)
self.assertEqual(self.s.blocks[256], 2)
self.assertEqual(self.s.blocks[16], 3)
def setUp(self):
self.s = Section()
def setUp(self):
self.s = Section()
