biomeswap.py

#!/usr/bin/python2

import pymclevel
import sys

print "Loading world..."
level = pymclevel.loadWorld('/home/seebs/src/mcaedit/world')
print "Loaded."

def has_object(chunk, id):
    x = (chunk.Blocks == id)
    if x.any():
        # print "Found id in %d, %d" % (cx, cz)
        return True
    return False

regions = dict()
sys.stdout.write("Building region list: ")
sys.stdout.flush()
found_regions = 0
found_chunks = 0
for cx, cz in list(level.allChunks):
    rx = cx / 32
    rz = cz / 32
    found_chunks += 1
    if rx not in regions:
    	regions[rx] = dict()
    if rz not in regions[rx]:
        regions[rx][rz] = list()
	found_regions += 1
	sys.stderr.write("+")
	sys.stderr.flush()
    regions[rx][rz].append({'x': cx, 'z': cz})
print "Done. %d chunks, %d regions." % (found_chunks, found_regions)

total = 0
delete = 0
useless_regions = list()
useless_chunks = list()
tried = 1
for rx in iter(regions):
    for rz in iter(regions[rx]):
        print "Region %d/%d [%d, %d]: %d chunks" % (tried, found_regions, rx, rz, len(regions[rx][rz]))
	tried = tried + 1
	sys.stdout.flush()
	this_batch = list()
	this_batch.append((rx, rz))
	useless_chunks.append(this_batch)
	found_any = False
        for coords in regions[rx][rz]:
	    cx = coords['x']
	    cz = coords['z']
	    chunk = level.getChunk(cx, cz)
	    x = (chunk.Biomes == 69)
	    if x.any():
		found_any = True
		chunk.Biomes[x] = 159
		print "Chunk [%d,%d] had biome 69." % (cx, cz)
		chunk.chunkChanged()

level.saveInPlace()