ign.lua

   1 --
   2 -- Igneous Layer
   3 --
   4
   5 local layer={
   6  top={
   7   offset = -13, scale = 0,
   8   spread = {x=80, y=80, z=80},
   9   octaves = 0, persist = 0 },
  10  bot={
  11   offset = -180, scale = 10, seed=100,
  12   spread = {x=80, y=80, z=80},
  13   octaves = 2, persist = 0.7 },
  14  primary={ name="rocks:basalt" },
  15  localized={},
  16  seedseq=100,
  17  stats={ count=0, total=0, node={}, totalnodes=0 }
  18 }
  19
  20 -- more rock defs
  21
  22
  23 local reg=function(name,param)
  24  layer.localized[name]={
  25   spread=(param.spread or 20),
  26   height=(param.height or 15),
  27   treshold=(param.treshold or 0.85),
  28   secondary=(param.secondary),
  29   seed=seedseq,
  30  }
  31  layer.stats.node[name]=0
  32  layer.seedseq=layer.seedseq+1
  33 end
  34 rocks.register_igneous=reg
  35
  36 -- rock registration
  37  --eg: reg("default:stone_with_coal", { spread=48, height=14, treshold=0.45 })
  38
  39 minetest.register_on_generated(function(minp, maxp, seed)
  40  if   ( (layer.top.offset+layer.top.scale)>minp.y )
  41   and ( (layer.bot.offset-layer.bot.scale)<maxp.y )
  42  then
  43   stone_ctx= minetest.get_content_id("default:stone")
  44   air_ctx= minetest.get_content_id("air")
  45   dirt_ctx= minetest.get_content_id("default:dirt")
  46   layer.primary.ctx= minetest.get_content_id(layer.primary.name)
  47   local timebefore=os.clock();
  48   local manipulator, emin, emax = minetest.get_mapgen_object("voxelmanip")
  49   local nodes = manipulator:get_data()
  50   local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
  51   local side_length = (maxp.x - minp.x) + 1
  52   local map_lengths_xyz = {x=side_length, y=side_length, z=side_length}
  53   -- noises:
  54   local bottom=minetest.get_perlin_map(layer.bot,map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z})
  55   local localized={}
  56   for name,loc in pairs(layer.localized) do
  57    --defaults and overrides
  58    local np={ offset = 0, scale = 1, octaves = 1, persist = 0.7,
  59     spread = {x=loc.spread, y=loc.height, z=loc.spread} }
  60    --get noise and content ids
  61    table.insert(localized,
  62    {
  63     noise=minetest.get_perlin_map(np,map_lengths_xyz):get3dMap_flat(minp),
  64     treshold=loc.treshold,
  65     ctx= minetest.get_content_id(name),
  66     ndn=name
  67    })
  68   end
  69   local noise2d_ix = 1
  70   local noise3d_ix = 1
  71   print("[rocks] igneous gen1 "..os.clock()-timebefore)
  72   for z=minp.z,maxp.z,1 do
  73    for y=minp.y,maxp.y,1 do
  74     for x=minp.x,maxp.x,1 do
  75      local pos = area:index(x, y, z)
  76      if  (y>bottom[noise2d_ix])
  77      and ((nodes[pos]==stone_ctx) or (nodes[pos]==dirt_ctx))
  78      then
  79       layer.stats.totalnodes=layer.stats.totalnodes+1
  80       if nodes[pos]==stone_ctx then nodes[pos] = air_ctx end --layer.primary.ctx
  81       for k,loc in pairs(localized) do
  82        if ( loc.noise[noise3d_ix] > loc.treshold) then
  83         nodes[pos]=loc.ctx
  84         layer.stats.node[loc.ndn]=layer.stats.node[loc.ndn]+1
  85        end
  86       end
  87      end
  88      noise2d_ix=noise2d_ix+1
  89      noise3d_ix=noise3d_ix+1
  90     end
  91     noise2d_ix=noise2d_ix-side_length
  92    end
  93    noise2d_ix=noise2d_ix+side_length
  94   end
  95   manipulator:set_data(nodes)
  96   --manipulator:calc_lighting()
  97   manipulator:set_lighting({day=15,night=15})
  98   --manipulator:update_liquids()
  99   manipulator:write_to_map()
 100   print("[rocks] igneous gen2 "..os.clock()-timebefore)
 101   layer.stats.count=layer.stats.count+1
 102   layer.stats.total=layer.stats.total+(os.clock()-timebefore)
 103   layer.stats.side=side_length
 104  end
 105 end)
 106
 107 minetest.register_on_shutdown(function()
 108  print("[rocks](ign) on_shutdown: generated total "..layer.stats.count.." chunks in "..layer.stats.total.." seconds ("..(layer.stats.total/layer.stats.count).." seconds per "..layer.stats.side.."^3 chunk)")
 109  for name,total in pairs(layer.stats.node) do
 110   print("[rocks](ign) "..name..": "..total.." nodes placed ("..(total*100)/(layer.stats.count*layer.stats.totalnodes).." %)")
 111  end
 112 end)
 113
 114 -- ~ Tomas Brod