forked from Mirrorlandia_minetest/minetest
updated example map generator python script
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Perttu Ahola
parent
50a8087684
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81ac026e1f
91
genmap.py
91
genmap.py
@ -1,17 +1,12 @@
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#!/usr/bin/python
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#!/usr/bin/python2
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"
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This is an example script that generates some valid map data.
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"
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# This is an example script that generates some valid map data.
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import struct
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import random
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def getrand():
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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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import os
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import sys
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from pnoise import pnoise
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"""
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Map format:
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@ -25,18 +20,72 @@ ffff = -1
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0001 = 1
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"""
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f = open("map/sectors/00000000/ffff", "wb")
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def to4h(i):
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s = "";
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s += '{0:1x}'.format((i>>12) & 0x000f)
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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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# 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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def getrand():
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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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for i in range(0,16*16*16):
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# Material content
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f.write(struct.pack('B', getrand()))
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# Brightness
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f.write(struct.pack('B', 15))
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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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try:
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os.makedirs(sectordir)
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except OSError:
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pass
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f.close()
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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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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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f.close()
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mapdir = "map"
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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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#END
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102
pnoise.py
Normal file
102
pnoise.py
Normal file
@ -0,0 +1,102 @@
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#
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# A python perlin noise implementation, from
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# http://www.fundza.com/c4serious/noise/perlin/perlin.html
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#
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# This is used for testing how to create maps with a python script.
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#
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import math
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p = (
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151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,
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30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,
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62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,
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125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,
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83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,
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143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,
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196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,
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250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,
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58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,
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221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,
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224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,
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12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,
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199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,
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205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180,
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151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,
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30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,
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62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,
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125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,
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83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,
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143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,
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196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,
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250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,
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58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,
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221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,
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224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,
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12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,
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199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,
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205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180)
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def lerp(t, a, b):
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return a + t * (b - a)
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def fade(t):
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return t * t * t * (t * (t * 6 - 15) + 10)
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def grad(hash, x, y, z):
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h = hash & 15
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if h < 8:
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u = x
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else:
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u = y
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if h < 4:
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v = y
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elif h == 12 or h == 14:
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v = x
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else:
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v = z
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if h & 1 != 0:
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u = -u
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if h & 2 != 0:
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v = -v
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return u + v
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def pnoise(x, y, z):
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global p
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X = int(math.floor(x)) & 255
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Y = int(math.floor(y)) & 255
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Z = int(math.floor(z)) & 255
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x -= math.floor(x)
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y -= math.floor(y)
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z -= math.floor(z)
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u = fade(x)
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v = fade(y)
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w = fade(z)
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A = p[X] + Y
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AA = p[A] + Z
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AB = p[A + 1] + Z
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B = p[X + 1] + Y
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BA = p[B] + Z
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BB = p[B + 1] + Z
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pAA = p[AA]
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pAB = p[AB]
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pBA = p[BA]
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pBB = p[BB]
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pAA1 = p[AA + 1]
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pBA1 = p[BA + 1]
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pAB1 = p[AB + 1]
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pBB1 = p[BB + 1]
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gradAA = grad(pAA, x, y, z)
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gradBA = grad(pBA, x-1, y, z)
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gradAB = grad(pAB, x, y-1, z)
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gradBB = grad(pBB, x-1, y-1, z)
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gradAA1 = grad(pAA1,x, y, z-1)
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gradBA1 = grad(pBA1,x-1, y, z-1)
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gradAB1 = grad(pAB1,x, y-1, z-1)
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gradBB1 = grad(pBB1,x-1, y-1, z-1)
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return lerp(w,
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lerp(v, lerp(u, gradAA, gradBA), lerp(u, gradAB, gradBB)),
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lerp(v, lerp(u, gradAA1,gradBA1),lerp(u, gradAB1,gradBB1)))
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@ -4711,6 +4711,9 @@ plan_b:
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/*
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Plan B: Get from map generator perlin noise function
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*/
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// This won't work if proper generation is disabled
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if(m_chunksize == 0)
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return WATER_LEVEL+2;
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double level = base_rock_level_2d(m_seed, p2d);
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return (s16)level;
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}
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@ -29,7 +29,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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NOTE: The goal is to increment this so that saved maps will be
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loadable by any version. Other compatibility is not
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maintained.
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Serialization format versions:
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Serialization format versions (for raw map data (blocks, nodes, sectors)):
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== Unsupported ==
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0: original networked test with 1-byte nodes
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1: update with 2-byte nodes
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