genmap.py

   1 #!/usr/bin/python2
   2
   3 # This is an example script that generates some valid map data.
   4
   5 import struct
   6 import random
   7 import os
   8 import sys
   9 from pnoise import pnoise
  10
  11 """
  12 Map format:
  13 map/sectors/XXXXZZZZ/YYYY
  14
  15 XXXX,YYYY,ZZZZ = coordinates in hexadecimal
  16
  17 fffe = -2
  18 ffff = -1
  19 0000 =  0
  20 0001 =  1
  21 """
  22
  23 def to4h(i):
  24         s = "";
  25         s += '{0:1x}'.format((i>>12) & 0x000f)
  26         s += '{0:1x}'.format((i>>8) & 0x000f)
  27         s += '{0:1x}'.format((i>>4) & 0x000f)
  28         s += '{0:1x}'.format((i>>0) & 0x000f)
  29         return s
  30
  31 def getrand():
  32         i = random.randrange(0,2)
  33         if i==0:
  34                 return 0
  35         return 254
  36
  37 def writeblock(mapdir, px,py,pz, version):
  38         sectordir = mapdir + "/sectors/" + to4h(px) + to4h(pz)
  39
  40         try:
  41                 os.makedirs(sectordir)
  42         except OSError:
  43                 pass
  44
  45         f = open(sectordir+"/"+to4h(py), "wb")
  46
  47         if version == 0:
  48                 # version
  49                 f.write(struct.pack('B', 0))
  50                 # is_underground
  51                 f.write(struct.pack('B', 0))
  52         elif version == 2:
  53                 # version
  54                 f.write(struct.pack('B', 2))
  55                 # is_underground
  56                 f.write(struct.pack('B', 0))
  57
  58         for z in range(0,16):
  59                 for y in range(0,16):
  60                         for x in range(0,16):
  61                                 b = 254
  62                                 r = 20.0*pnoise((px*16+x)/100.,(pz*16+z)/100.,0)
  63                                 r += 5.0*pnoise((px*16+x)/25.,(pz*16+z)/25.,0)
  64                                 #print("r="+str(r))
  65                                 y1 = py*16+y
  66                                 if y1 <= r-3:
  67                                         b = 0 #stone
  68                                 elif y1 <= r:
  69                                         b = 1 #grass
  70                                 elif y1 <= 1:
  71                                         b = 9 #water
  72                                 if version == 0:
  73                                         # Material content
  74                                         f.write(struct.pack('B', b))
  75                                 elif version == 2:
  76                                         # Material content
  77                                         f.write(struct.pack('B', b))
  78                                         # Brightness
  79                                         f.write(struct.pack('B', 15))
  80
  81         f.close()
  82
  83 mapdir = "map"
  84
  85 for z in range(-2,3):
  86         for y in range(-1,2):
  87                 for x in range(-2,3):
  88                         print("generating block "+str(x)+","+str(y)+","+str(z))
  89                         writeblock(mapdir, x,y,z, 0)
  90
  91 #END