349 lines
13 KiB
Python
349 lines
13 KiB
Python
# This file is part of the Minecraft Overviewer.
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#
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# Minecraft Overviewer is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or (at
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# your option) any later version.
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#
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# Minecraft Overviewer is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with the Overviewer. If not, see <http://www.gnu.org/licenses/>.
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import functools
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import os
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import os.path
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from glob import glob
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import multiprocessing
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import Queue
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import sys
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import logging
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import cPickle
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import collections
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import itertools
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import numpy
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import chunk
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import nbt
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import textures
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import time
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"""
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This module has routines for extracting information about available worlds
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"""
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base36decode = functools.partial(int, base=36)
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cached = collections.defaultdict(dict)
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def base36encode(number, alphabet='0123456789abcdefghijklmnopqrstuvwxyz'):
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'''
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Convert an integer to a base36 string.
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'''
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if not isinstance(number, (int, long)):
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raise TypeError('number must be an integer')
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newn = abs(number)
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# Special case for zero
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if number == 0:
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return '0'
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base36 = ''
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while newn != 0:
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newn, i = divmod(newn, len(alphabet))
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base36 = alphabet[i] + base36
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if number < 0:
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return "-" + base36
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return base36
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class World(object):
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"""Does world-level preprocessing to prepare for QuadtreeGen
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worlddir is the path to the minecraft world
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"""
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mincol = maxcol = minrow = maxrow = 0
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def __init__(self, worlddir, useBiomeData=False,regionlist=None):
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self.worlddir = worlddir
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self.useBiomeData = useBiomeData
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#find region files, or load the region list
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#this also caches all the region file header info
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logging.info("Scanning regions")
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regionfiles = {}
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self.regions = {}
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if regionlist:
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self.regionlist = map(os.path.abspath, regionlist) # a list of paths
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else:
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self.regionlist = None
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for x, y, regionfile in self._iterate_regionfiles():
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mcr = self.reload_region(regionfile)
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mcr.get_chunk_info()
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regionfiles[(x,y)] = (x,y,regionfile,mcr)
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self.regionfiles = regionfiles
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# set the number of region file handles we will permit open at any time before we start closing them
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# self.regionlimit = 1000
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# the max number of chunks we will keep before removing them (includes emptry chunks)
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self.chunklimit = 1024
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self.chunkcount = 0
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self.empty_chunk = [None,None]
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logging.debug("Done scanning regions")
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# figure out chunk format is in use
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# if not mcregion, error out early
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data = nbt.load(os.path.join(self.worlddir, "level.dat"))[1]['Data']
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#print data
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if not ('version' in data and data['version'] == 19132):
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logging.error("Sorry, This version of Minecraft-Overviewer only works with the new McRegion chunk format")
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sys.exit(1)
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# stores Points Of Interest to be mapped with markers
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# a list of dictionaries, see below for an example
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self.POI = []
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# if it exists, open overviewer.dat, and read in the data structure
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# info self.persistentData. This dictionary can hold any information
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# that may be needed between runs.
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# Currently only holds into about POIs (more more details, see quadtree)
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# TODO maybe store this with the tiles, not with the world?
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self.pickleFile = os.path.join(self.worlddir, "overviewer.dat")
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if os.path.exists(self.pickleFile):
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with open(self.pickleFile,"rb") as p:
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self.persistentData = cPickle.load(p)
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else:
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# some defaults
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self.persistentData = dict(POI=[])
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def get_region_path(self, chunkX, chunkY):
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"""Returns the path to the region that contains chunk (chunkX, chunkY)
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"""
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_, _, regionfile,_ = self.regionfiles.get((chunkX//32, chunkY//32),(None,None,None,None));
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return regionfile
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def load_from_region(self,filename, x, y):
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#we need to manage the chunk cache
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regioninfo = self.regions[filename]
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if regioninfo is None:
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return None
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chunks = regioninfo[2]
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chunk_data = chunks.get((x,y))
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if chunk_data is None:
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#prune the cache if required
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if self.chunkcount > self.chunklimit: #todo: make the emptying the chunk cache slightly less crazy
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[self.reload_region(regionfile) for regionfile in self.regions if regionfile <> filename]
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self.chunkcount = 0
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self.chunkcount += 1
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nbt = self.load_region(filename).load_chunk(x, y)
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if nbt is None:
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chunks[(x,y)] = self.empty_chunk
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return None ## return none. I think this is who we should indicate missing chunks
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#raise IOError("No such chunk in region: (%i, %i)" % (x, y))
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#we cache the transformed data, not it's raw form
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data = nbt.read_all()
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level = data[1]['Level']
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chunk_data = level
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#chunk_data = {}
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#chunk_data['skylight'] = chunk.get_skylight_array(level)
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#chunk_data['blocklight'] = chunk.get_blocklight_array(level)
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#chunk_data['blockarray'] = chunk.get_blockdata_array(level)
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#chunk_data['TileEntities'] = chunk.get_tileentity_data(level)
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chunks[(x,y)] = [level,time.time()]
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else:
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chunk_data = chunk_data[0]
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return chunk_data
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#used to reload a changed region
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def reload_region(self,filename):
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if self.regions.get(filename) is not None:
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self.regions[filename][0].closefile()
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chunkcache = {}
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mcr = nbt.MCRFileReader(filename)
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self.regions[filename] = (mcr,os.path.getmtime(filename),chunkcache)
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return mcr
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def load_region(self,filename):
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return self.regions[filename][0]
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def get_region_mtime(self,filename):
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return (self.regions[filename][0],self.regions[filename][1])
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def convert_coords(self, chunkx, chunky):
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"""Takes a coordinate (chunkx, chunky) where chunkx and chunky are
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in the chunk coordinate system, and figures out the row and column
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in the image each one should be. Returns (col, row)."""
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# columns are determined by the sum of the chunk coords, rows are the
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# difference (TODO: be able to change direction of north)
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# change this function, and you MUST change unconvert_coords
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return (chunkx + chunky, chunky - chunkx)
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def unconvert_coords(self, col, row):
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"""Undoes what convert_coords does. Returns (chunkx, chunky)."""
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# col + row = chunky + chunky => (col + row)/2 = chunky
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# col - row = chunkx + chunkx => (col - row)/2 = chunkx
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return ((col - row) / 2, (col + row) / 2)
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def findTrueSpawn(self):
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"""Adds the true spawn location to self.POI. The spawn Y coordinate
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is almost always the default of 64. Find the first air block above
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that point for the true spawn location"""
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## read spawn info from level.dat
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data = nbt.load(os.path.join(self.worlddir, "level.dat"))[1]
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spawnX = data['Data']['SpawnX']
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spawnY = data['Data']['SpawnY']
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spawnZ = data['Data']['SpawnZ']
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## The chunk that holds the spawn location
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chunkX = spawnX/16
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chunkY = spawnZ/16
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## The filename of this chunk
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chunkFile = self.get_region_path(chunkX, chunkY)
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if chunkFile is not None:
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data = nbt.load_from_region(chunkFile, chunkX, chunkY)[1]
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if data is not None:
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level = data['Level']
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blockArray = numpy.frombuffer(level['Blocks'], dtype=numpy.uint8).reshape((16,16,128))
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## The block for spawn *within* the chunk
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inChunkX = spawnX - (chunkX*16)
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inChunkZ = spawnZ - (chunkY*16)
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## find the first air block
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while (blockArray[inChunkX, inChunkZ, spawnY] != 0):
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spawnY += 1
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if spawnY == 128:
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break
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self.POI.append( dict(x=spawnX, y=spawnY, z=spawnZ,
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msg="Spawn", type="spawn", chunk=(chunkX, chunkY)))
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self.spawn = (spawnX, spawnY, spawnZ)
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def go(self, procs):
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"""Scan the world directory, to fill in
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self.{min,max}{col,row} for use later in quadtree.py. This
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also does other world-level processing."""
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logging.info("Scanning chunks")
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# find the dimensions of the map, in region files
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minx = maxx = miny = maxy = 0
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found_regions = False
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for x, y in self.regionfiles:
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found_regions = True
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minx = min(minx, x)
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maxx = max(maxx, x)
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miny = min(miny, y)
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maxy = max(maxy, y)
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if not found_regions:
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logging.error("Error: No chunks found!")
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sys.exit(1)
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logging.debug("Done scanning chunks")
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# turn our region coordinates into chunk coordinates
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minx = minx * 32
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miny = miny * 32
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maxx = maxx * 32 + 32
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maxy = maxy * 32 + 32
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# Translate chunks to our diagonal coordinate system
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mincol = maxcol = minrow = maxrow = 0
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for chunkx, chunky in [(minx, miny), (minx, maxy), (maxx, miny), (maxx, maxy)]:
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col, row = self.convert_coords(chunkx, chunky)
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mincol = min(mincol, col)
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maxcol = max(maxcol, col)
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minrow = min(minrow, row)
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maxrow = max(maxrow, row)
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#logging.debug("map size: (%i, %i) to (%i, %i)" % (mincol, minrow, maxcol, maxrow))
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self.mincol = mincol
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self.maxcol = maxcol
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self.minrow = minrow
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self.maxrow = maxrow
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self.findTrueSpawn()
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def _iterate_regionfiles(self,regionlist=None):
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"""Returns an iterator of all of the region files, along with their
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coordinates
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Note: the regionlist here will be used to determinte the size of the
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world.
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Returns (regionx, regiony, filename)"""
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join = os.path.join
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if regionlist is not None:
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for path in regionlist:
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path = path.strip()
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f = os.path.basename(path)
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if f.startswith("r.") and f.endswith(".mcr"):
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p = f.split(".")
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logging.debug("Using path %s from regionlist", f)
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yield (int(p[1]), int(p[2]), join(self.worlddir, 'region', f))
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else:
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logging.warning("Ignore path '%s' in regionlist", f)
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else:
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for path in glob(os.path.join(self.worlddir, 'region') + "/r.*.*.mcr"):
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dirpath, f = os.path.split(path)
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p = f.split(".")
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yield (int(p[1]), int(p[2]), join(dirpath, f))
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def get_save_dir():
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"""Returns the path to the local saves directory
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* On Windows, at %APPDATA%/.minecraft/saves/
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* On Darwin, at $HOME/Library/Application Support/minecraft/saves/
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* at $HOME/.minecraft/saves/
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"""
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savepaths = []
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if "APPDATA" in os.environ:
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savepaths += [os.path.join(os.environ['APPDATA'], ".minecraft", "saves")]
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if "HOME" in os.environ:
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savepaths += [os.path.join(os.environ['HOME'], "Library",
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"Application Support", "minecraft", "saves")]
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savepaths += [os.path.join(os.environ['HOME'], ".minecraft", "saves")]
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for path in savepaths:
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if os.path.exists(path):
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return path
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def get_worlds():
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"Returns {world # or name : level.dat information}"
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ret = {}
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save_dir = get_save_dir()
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# No dirs found - most likely not running from inside minecraft-dir
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if save_dir is None:
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return None
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for dir in os.listdir(save_dir):
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world_dat = os.path.join(save_dir, dir, "level.dat")
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if not os.path.exists(world_dat): continue
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info = nbt.load(world_dat)[1]
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info['Data']['path'] = os.path.join(save_dir, dir)
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if dir.startswith("World") and len(dir) == 6:
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try:
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world_n = int(dir[-1])
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ret[world_n] = info['Data']
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except ValueError:
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pass
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if 'LevelName' in info['Data'].keys():
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ret[info['Data']['LevelName']] = info['Data']
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return ret
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