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