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@@ -6,19 +6,42 @@ import struct
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import random
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import os
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import sys
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+import zlib
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+import array
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from pnoise import pnoise
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-"""
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-Map format:
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-map/sectors/XXXXZZZZ/YYYY
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+# Old directory format:
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+# world/sectors/XXXXZZZZ/YYYY
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+# XXXX,YYYY,ZZZZ = coordinates in hexadecimal
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+# fffe = -2
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+# ffff = -1
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+# 0000 = 0
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+# 0001 = 1
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+#
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+# New directory format:
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+# world/sectors2/XXX/ZZZ/YYYY
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+# XXX,YYYY,ZZZ = coordinates in hexadecimal
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+# fffe = -2
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+# ffff = -1
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+# 0000 = 0
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+# 0001 = 1
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+# ffe = -2
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+# fff = -1
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+# 000 = 0
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+# 001 = 1
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+#
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+# For more proper file format documentation, refer to mapformat.txt
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+# For node type documentation, refer to mapnode.h
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+# NodeMetadata documentation is not complete, refer to nodemeta.cpp
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+#
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-XXXX,YYYY,ZZZZ = coordinates in hexadecimal
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+# Seed for generating terrain
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+SEED = 0
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-fffe = -2
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-ffff = -1
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-0000 = 0
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-0001 = 1
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-"""
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+# 0=old, 1=new
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+SECTOR_DIR_FORMAT = 1
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+
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+mapdir = "world"
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def to4h(i):
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s = "";
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@@ -28,64 +51,221 @@ def to4h(i):
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s += '{0:1x}'.format((i>>0) & 0x000f)
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return s
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-def getrand():
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+def to3h(i):
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+ s = "";
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+ s += '{0:1x}'.format((i>>8) & 0x000f)
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+ s += '{0:1x}'.format((i>>4) & 0x000f)
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+ s += '{0:1x}'.format((i>>0) & 0x000f)
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+ return s
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+
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+def get_sector_dir(px, pz):
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+ global SECTOR_DIR_FORMAT
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+ if SECTOR_DIR_FORMAT == 0:
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+ return "/sectors/"+to4h(px)+to4h(pz)
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+ elif SECTOR_DIR_FORMAT == 1:
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+ return "/sectors2/"+to3h(px)+"/"+to3h(pz)
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+ else:
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+ assert(0)
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+
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+def getrand_air_stone():
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i = random.randrange(0,2)
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if i==0:
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return 0
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return 254
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-def writeblock(mapdir, px,py,pz, version):
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- sectordir = mapdir + "/sectors/" + to4h(px) + to4h(pz)
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+# 3-dimensional vector (position)
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+class v3:
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+ def __init__(self, x=0, y=0, z=0):
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+ self.X = x
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+ self.Y = y
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+ self.Z = z
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+
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+class NodeMeta:
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+ def __init__(self, type_id, data):
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+ self.type_id = type_id
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+ self.data = data
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+
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+class StaticObject:
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+ def __init__(self):
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+ self.type_id = 0
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+ self.data = ""
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+
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+def ser_u16(i):
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+ return chr((i>>8)&0xff) + chr((i>>0)&0xff)
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+def ser_u32(i):
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+ return (chr((i>>24)&0xff) + chr((i>>16)&0xff)
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+ + chr((i>>8)&0xff) + chr((i>>0)&0xff))
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+
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+# A 16x16x16 chunk of map
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+class MapBlock:
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+ def __init__(self):
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+ self.content = array.array('B')
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+ self.param1 = array.array('B')
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+ self.param2 = array.array('B')
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+ for i in range(16*16*16):
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+ # Initialize to air
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+ self.content.append(254)
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+ # Full light on sunlight, none when no sunlight
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+ self.param1.append(15)
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+ # No additional parameters
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+ self.param2.append(0)
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+
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+ # key = v3 pos
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+ # value = NodeMeta
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+ self.nodemeta = {}
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+
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+ # key = v3 pos
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+ # value = StaticObject
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+ self.static_objects = {}
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+
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+ def set_content(self, v3, b):
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+ self.content[v3.Z*16*16+v3.Y*16+v3.X] = b
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+ def set_param1(self, v3, b):
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+ self.param1[v3.Z*16*16+v3.Y*16+v3.X] = b
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+ def set_param2(self, v3, b):
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+ self.param2[v3.Z*16*16+v3.Y*16+v3.X] = b
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+
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+ # Get data for serialization. Returns a string.
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+ def serialize_data(self):
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+ s = ""
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+ for i in range(16*16*16):
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+ s += chr(self.content[i])
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+ for i in range(16*16*16):
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+ s += chr(self.param1[i])
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+ for i in range(16*16*16):
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+ s += chr(self.param2[i])
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+ return s
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+
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+ def serialize_nodemeta(self):
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+ s = ""
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+ s += ser_u16(1)
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+ s += ser_u16(len(self.nodemeta))
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+ for pos, meta in self.nodemeta.items():
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+ pos_i = pos.Z*16*16 + pos.Y*16 + pos.X
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+ s += ser_u16(pos_i)
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+ s += ser_u16(meta.type_id)
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+ s += ser_u16(len(meta.data))
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+ s += meta.data
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+ return s
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+
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+ def serialize_staticobj(self):
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+ s = ""
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+ s += chr(0)
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+ s += ser_u16(len(self.static_objects))
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+ for pos, obj in self.static_objects.items():
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+ pos_i = pos.Z*16*16 + pos.Y*16 + pos.X
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+ s += ser_s32(pos.X*1000)
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+ s += ser_s32(pos.Y*1000)
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+ s += ser_s32(pos.Z*1000)
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+ s += ser_u16(obj.type_id)
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+ s += ser_u16(len(obj.data))
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+ s += obj.data
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+ return s
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+
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+def writeblock(mapdir, px,py,pz, block):
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+
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+ sectordir = mapdir + get_sector_dir(px, pz);
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try:
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os.makedirs(sectordir)
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except OSError:
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pass
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+
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+ path = sectordir+"/"+to4h(py)
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+
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+ print("writing block file "+path)
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f = open(sectordir+"/"+to4h(py), "wb")
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- if version == 0:
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- # version
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- f.write(struct.pack('B', 0))
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- # is_underground
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- f.write(struct.pack('B', 0))
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- elif version == 2:
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- # version
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- f.write(struct.pack('B', 2))
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- # is_underground
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- f.write(struct.pack('B', 0))
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+ if f == None:
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+ return
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+
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+ # version
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+ version = 17
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+ f.write(struct.pack('B', version))
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+
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+ # flags
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+ # 0x01=is_undg, 0x02=dn_diff, 0x04=lighting_expired
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+ flags = 0 + 0x02 + 0x04
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+ f.write(struct.pack('B', flags))
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- for z in range(0,16):
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- for y in range(0,16):
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- for x in range(0,16):
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- b = 254
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- r = 20.0*pnoise((px*16+x)/100.,(pz*16+z)/100.,0)
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- r += 5.0*pnoise((px*16+x)/25.,(pz*16+z)/25.,0)
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- #print("r="+str(r))
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- y1 = py*16+y
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- if y1 <= r-3:
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- b = 0 #stone
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- elif y1 <= r:
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- b = 1 #grass
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- elif y1 <= 1:
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- b = 9 #water
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- if version == 0:
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- # Material content
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- f.write(struct.pack('B', b))
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- elif version == 2:
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- # Material content
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- f.write(struct.pack('B', b))
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- # Brightness
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- f.write(struct.pack('B', 15))
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+ # data
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+ c_obj = zlib.compressobj()
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+ c_obj.compress(block.serialize_data())
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+ f.write(struct.pack('BB', 0x78, 0x9c)) # zlib magic number
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+ f.write(c_obj.flush())
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+
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+ # node metadata
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+ c_obj = zlib.compressobj()
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+ c_obj.compress(block.serialize_nodemeta())
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+ f.write(struct.pack('BB', 0x78, 0x9c)) # zlib magic number
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+ f.write(c_obj.flush())
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+
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+ # mapblockobject count
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+ f.write(ser_u16(0))
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+
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+ # static objects
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+ f.write(block.serialize_staticobj())
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+
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+ # timestamp
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+ f.write(ser_u32(0xffffffff))
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f.close()
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-mapdir = "map"
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+for z0 in range(-1,3):
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+ for x0 in range(-1,3):
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+ for y0 in range(-1,3):
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+ print("generating block "+str(x0)+","+str(y0)+","+str(z0))
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+ #v3 blockp = v3(x0,y0,z0)
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+
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+ # Create a MapBlock
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+ block = MapBlock()
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+
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+ # Generate stuff in it
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+ for z in range(0,16):
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+ for x in range(0,16):
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+ h = 20.0*pnoise((x0*16+x)/100.,(z0*16+z)/100.,SEED+0)
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+ h += 5.0*pnoise((x0*16+x)/25.,(z0*16+z)/25.,SEED+0)
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+ if pnoise((x0*16+x)/25.,(z0*16+z)/25.,SEED+92412) > 0.05:
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+ h += 10
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+ #print("r="+str(r))
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+ # This enables comparison by ==
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+ h = int(h)
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+ for y in range(0,16):
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+ p = v3(x,y,z)
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+ b = 254
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+ y1 = y0*16+y
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+ if y1 <= h-3:
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+ b = 0 #stone
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+ elif y1 <= h and y1 <= 0:
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+ b = 8 #mud
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+ elif y1 == h:
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+ b = 1 #grass
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+ elif y1 < h:
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+ b = 8 #mud
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+ elif y1 <= 1:
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+ b = 9 #water
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+
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+ # Material content
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+ block.set_content(p, b)
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+
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+ # Place a sign at the center at surface level.
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+ # Placing a sign means placing the sign node and
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+ # adding node metadata to the mapblock.
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+ if x == 8 and z == 8 and y0*16 <= h-1 and (y0+1)*16-1 > h:
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+ p = v3(8,h+1-y0*16,8)
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+ # 14 = Sign
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+ content_type = 14
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+ block.set_content(p, content_type)
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+ # This places the sign to the bottom of the cube.
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+ # Working values: 0x01, 0x02, 0x04, 0x08, 0x10, 0x20
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+ block.set_param2(p, 0x08)
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+ # Then add metadata to hold the text of the sign
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+ s = "Hello at sector ("+str(x0)+","+str(z0)+")"
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+ meta = NodeMeta(content_type, ser_u16(len(s))+s)
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+ block.nodemeta[p] = meta
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-for z in range(-2,3):
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- for y in range(-1,2):
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- for x in range(-2,3):
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- print("generating block "+str(x)+","+str(y)+","+str(z))
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- writeblock(mapdir, x,y,z, 0)
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+ # Write it on disk
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+ writeblock(mapdir, x0,y0,z0, block)
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#END
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