Vein gen cleanup and experimental ores in veins.

Move mineral noise to init.lua. Moved peg mineral descr to mineral peg.

AmplifiedMGv7.txt

@@ -0,0 +1,138 @@
+# world_dir/map_meta.txt
+chunksize = 5
+mg_biome_np_heat = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 3
+	offset = 50
+	persistence = 0.5
+	scale = 50
+	seed = 5349
+	spread = (500,500,500)
+}
+mg_biome_np_humidity = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 3
+	offset = 50
+	persistence = 0.5
+	scale = 50
+	seed = 842
+	spread = (500,500,500)
+}
+mg_flags = trees, caves, nodungeons, noflat, light
+mg_name = v7
+mgv7_np_cave1 = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 4
+	offset = 0
+	persistence = 0.5
+	scale = 12
+	seed = 52534
+	spread = (100,100,100)
+}
+mgv7_np_cave2 = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 4
+	offset = 0
+	persistence = 0.5
+	scale = 12
+	seed = 10325
+	spread = (100,100,100)
+}
+mgv7_np_filler_depth = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 4
+	offset = 0
+	persistence = 0.7
+	scale = 1.2
+	seed = 261
+	spread = (150,150,150)
+}
+mgv7_np_height_select = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 5
+	offset = -0.5
+	persistence = 0.69
+	scale = 1
+	seed = 4213
+	spread = (250,250,250)
+}
+mgv7_np_mount_height = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 6
+	offset = 630
+	persistence = 0.6
+	scale = 250
+	seed = 72449
+	spread = (2000,2000,2000)
+}
+mgv7_np_mountain = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 5
+	offset = -0.6
+	persistence = 0.68
+	scale = 1
+	seed = 5333
+	spread = (750,1400,750)
+}
+mgv7_np_ridge = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 4
+	offset = 0
+	persistence = 0.75
+	scale = 1
+	seed = 6467
+	spread = (100,100,100)
+}
+mgv7_np_ridge_uwater = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 4
+	offset = 0
+	persistence = 0.6
+	scale = 1
+	seed = 85039
+	spread = (500,500,500)
+}
+mgv7_np_terrain_alt = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 5
+	offset = 4
+	persistence = 0.6
+	scale = 50
+	seed = 5934
+	spread = (1200,1200,1200)
+}
+mgv7_np_terrain_base = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 6
+	offset = 4
+	persistence = 0.7
+	scale = 70
+	seed = 82341
+	spread = (300,300,300)
+}
+mgv7_np_terrain_persist = {
+	flags = defaults
+	lacunarity = 2
+	octaves = 3
+	offset = 0.6
+	persistence = 0.6
+	scale = 0.1
+	seed = 539
+	spread = (500,500,500)
+}
+mgv7_spflags = mountains, ridges
+seed = 9237944289836255171
+water_level = 1
+[end_of_params]

a.txt

@@ -4,26 +4,37 @@ Geological layer generator for [Minetest] "rocks"
 Aim of this mod is to replace all generic stone (default:stone) and 
 generate underground layers of different rocks.
 
-Currently everithing generated above ground, in air. This is for debugging.
-
 Features
 --------
 
 * layers of different rocks: sort of working
-* ore veins: nothing
+* ore veins: being added
-* extensibility, api: ok
+* extensibility, api: changed million times
 
 ** Work in progress! **
 
 * git clone git://repo.or.cz/rocks.git ([show](http://repo.or.cz/rocks.git/))
 * (old) Git clone: [https](https://gitorious.org/mt/rocks.git)
+* Forum [post](https://forum.minetest.net/viewtopic.php?f=9&t=11779)
+
+This mod nor minetest_game/default do not define meaningful biomes. 
+So if you do not want unlimited grassland I suggest installing the 
+[Paramat's biomesdev mod](https://github.com/paramat/biomesdev) and adding 
+"rocks?" to depends.txt file inside the biomesdev folder. This is needed, 
+becouse "rocks" overrides the standard biome registration callback to patch 
+in it's own sedimentary rocks.
 
 Screenshots
 -----------
 
-* Layers: ![sample of layers](layers0.png)
+all were out of date
-* Coal pane: ![large coal deposit](coal-pane0.png)
+
-* Vein: ![sample of generated vein](vein0.png)
+License
+-------
+
+* My Code: GNU General Public License v2 or higher.
+* Media: see txt files in the texture folder
+* stated in the corresponding file
 
 Documentation
 -------------
@@ -31,3 +42,104 @@ Documentation
 How the underground is generated: *todo*.
 
 Mod has been rewritten, so no doc yet.
+
+The sedimentary layer
+-------------
+
+Is implemented by modifiing MGv7 biomes to use rocks's sedimentary rocks. 
+This means that you need mapgen v7 enabled. I also suggest enabling caves 
+and dungeons, as they are cool. 
+
+Soil is normlly 50-70 cm deep in real life, so I made soil (dirt) only 1 
+block thick. Under this thin layer of dirt an sedimentary layer is located. 
+In RL, there is clay and other stuff.
+
+There are various types of sedimentary rock. They are generated according 
+to 2D noises described below.
+
+types = Clastic, Biochemical,  Chemical, Vulcano/Other
+
+| X      | tp2<0.76     | tp2>0.7 |
+|--------|--------------|--------|
+| tp1<0.2 |   Clastic    |  Chemical |
+| tp1>0.2 | BioChemical  |  Vu/Ot |
+
+- Noise_tp1( 50)= type1
+- Noise_tp2( 70)= type2
+- Noise_vc(100)= particle size
+- Noise_sp(220)= pressue/ hardness
+
+I. 2D: fast, acceptable imho <-(used)
+II. 3D: nice
+
+### Clastic sediments
+
+Made from large or small particles. Either loose or bound into stones.
+
+(particle size: top-large botom-small)
+
+(hargness: loose -> solid)
+
+1. gravel -> conglomerate
+2. sand -> sandstone
+3. mudstone
+4. clay -> claystone -> slate
+
+### BioChemical sediments
+
+Made from acient plants and creatures that died long ago and turned into rock.
+
+Noise_vs: kind of sediment: (top) oil, Limestone, other, carbon-based
+
+Noise_sp: low quality -> high quality
+
+1. oil: ?
+2. Limestone
+3. other: fosfates, silicates, hornfels (unimp)
+4. carbon-based: Lignite -> Coal -> Anthracite
+
+### Chemical sediments
+
+Created by chemical or physics/chemical reactions.
+
+- Evaporites (unimp)
+
+### Vulanic and extraterrestrial sediments
+
+???
+
+The Igenous layer
+--------------
+
+Default stone is aliased to basalt, but for some reason the alias is not 
+working so please treat stone as basalt until I find way to fix it.
+
+Everything below sedimentary and (unimp) metamorphic layer is of igneous origin. Primary rock is basalt. But about half of basalt is replaced by granite. Some smaller fraction (like 20%) is then replaced by diorite and gabbro.
+These are the primary rocks, and more should come.
+
+### Mineral distribution
+
+Mineral ore is placed only in nodes of correct rock and only if the region 
+for the ore is right. These "mineral biomes" can and do overlap and change 
+every like 100 nodes. Following regions are defined:
+
+| Region  | minerals
+|---------|----------
+| Copper  | Chalcopyrite, Malachyte
+| Pb/Zn   | Sphalerite, Galena
+| Iron    | Magnetite
+
+### Skarn deposits
+
+Are larg-ish (15-20m) blobs of skarn stone. They spawn only in granite and 
+limestone. Copper, Lead, Zinc and Iron ores often enrich the skarn stone. 
+Some deposits may (unimp) contain considerable amounts of Molybenium, 
+Uranium and Wolfram ores.
+
+Concentration of the minerals is quite high, as to regard the player for 
+finding a not-so-common skarn vein.
+
+### Pegmatite veis
+
+Spawn only in granite. Are bit larger than skarn veins. Contain minerals 
+like skarn and more exotic minerals.

ign.lua

@@ -1,85 +0,0 @@
---
--- Igneous Layer
---
-
-local ign={
- top={
-  offset = -10, scale = 0,
-  spread = {x=80, y=80, z=80},
-  octaves = 0, persist = 0 },
- bot={
-  offset = -180, scale = 10, seed=rocksl.GetNextSeed(),
-  spread = {x=80, y=80, z=80},
-  octaves = 2, persist = 0.7 },
- primary={ name="rocks:basalt" },
- localized={},
- stats={ count=0, total=0, node={}, totalnodes=0 },
- debugging=nil
-}
-
--- Basalt       Ex/Mafic   hard  same as diorite, byt limit=0.5
-minetest.register_node( "rocks:basalt", {  
-	description = S("Basalt"),
-	tiles = { "rocks_Basalt.png" },
-	groups = {cracky=3, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-
--- more rock defs
-minetest.register_node( "rocks:granite", {  
-	description = S("Granite"),
-	tiles = { "rocks_Granite.png" },
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-	groups = {cracky=3, stone=1}, 
-})
-minetest.register_node( "rocks:diorite", {  
-	description = S("Diorite"),
-	tiles = { "rocks_Diorite.png" },
-	groups = {cracky=3, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-minetest.register_node( "rocks:gabbro", {  
-	description = S("Gabbro"),
-	tiles = { "rocks_Gabbro.png" },
-	groups = {cracky=3, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-
-local reg=function(name,param)
- rocksl.register_stratus(ign,name,param)
-end
-rocks.register_igneous_stratus=reg
-
--- rock registration
- reg("rocks:granite", { spread=40, height=32, treshold=0.06})
- reg("rocks:diorite", { spread=40, height=32, treshold=0.23})
- reg("rocks:gabbro",  { spread=40, height=32, treshold=0.36})
-
--- vein stuff
-ign.veins={}
-
-rocksl.register_vein(ign.veins,"default:nyancat",{
-  wherein="rocks:granite",
-  miny=-160, maxy=20,
-  radius={ average=10, amplitude=4, frequency=8 },
-  density=1,
-  rarity=0.025, -- this^3*mapblock_volume veins per mapblock
-  })
-
---    { primary="rocks:pegmatite_diamond", size=3, count=5,
---      rarity=0.3 -- (this/count) chance of spawning cluster in the vein
-
-minetest.register_on_generated(function(minp, maxp, seed)
- rocksl.layergen(ign,minp,maxp,seed)
- rocksl.veingen(ign.veins,minp,maxp,seed)
-end)
-
-minetest.register_on_shutdown(function()
- if (ign.stats.count==0) then rocksl.print("[rocks](ign) stats not available, no chunks generated") return end
- rocksl.print("[rocks](ign) generated total "..ign.stats.count.." chunks in "..ign.stats.total.." seconds ("..(ign.stats.total/ign.stats.count).." seconds per "..ign.stats.side.."^3 chunk)")
- for name,total in pairs(ign.stats.node) do
-  rocksl.print("[rocks](ign) "..name..": "..total.." nodes placed ("..(total*100)/(ign.stats.totalnodes).." %)")
- end
-end)
-
--- ~ Tomas Brod

init.lua

@@ -1,27 +0,0 @@
-minetest.log("info","[rocks] mod initializing")
-
--- Load translation library if intllib is installed
-
-if (minetest.get_modpath("intllib")) then
-	dofile(minetest.get_modpath("intllib").."/intllib.lua")
-	S = intllib.Getter(minetest.get_current_modname())
-	else
-	S = function ( s ) return s end
-end
-
-rocks={}
-rocksl={}
-
-rocksl.print=function(text)
- print("[rocks] "..text)
-end
-
-local modpath=minetest.get_modpath(minetest.get_current_modname())
-
-dofile(modpath.."/mapgen.lua")
-dofile(modpath.."/sed.lua")
-dofile(modpath.."/ign.lua")
-
-minetest.register_on_mapgen_init(function(mapgen_params)
- -- todo: disable caves and ores
-end)

mapgen.lua

@@ -1,181 +0,0 @@
---
--- layer generator
---
-
-local print2=function(text)
- minetest.log("verbose","rocks/gen/ "..text)
-end
-
-rocksl.seedseq=0
-rocksl.GetNextSeed=function()
- rocksl.seedseq=rocksl.seedseq+20
- print2("seed "..rocksl.seedseq)
- return rocksl.seedseq
-end
-
-rocksl.register_stratus=function(layer,name,param)
- table.insert(layer.localized,{
-  primary=name,
-  spread=(param.spread or 20),
-  height=(param.height or 15),
-  treshold=(param.treshold or 0.85),
-  secondary=param.secondary,
-  seed=(rocksl.GetNextSeed()),
- })
- layer.stats.node[name]=0
-end
-
-rocksl.register_vein=function(col,name,param)
- table.insert(col,{
-   primary=name,
-   wherein=param.wherein,
-   miny=param.miny, maxy=param.maxy,
-   radius={ average=param.radius.average, amplitude=param.radius.amplitude, frequency=param.radius.frequency },
-   density=(param.density or 1),
-   rarity=param.rarity,
-   localized={}
-  })
-end
-
-rocksl.layergen=function(layer, minp, maxp, seed)
- if   ( (layer.top.offset+layer.top.scale)>minp.y )
-  and ( (layer.bot.offset-layer.bot.scale)<maxp.y )
- then
-  stone_ctx= minetest.get_content_id("default:stone")
-  air_ctx= minetest.get_content_id("air")
-  dirt_ctx= minetest.get_content_id("default:dirt")
-  if layer.debugging then 
-   layer.primary.ctx= air_ctx
-  else
-   layer.primary.ctx= minetest.get_content_id(layer.primary.name)
-  end
-  local timebefore=os.clock();
-  local manipulator, emin, emax = minetest.get_mapgen_object("voxelmanip")
-  local nodes = manipulator:get_data()
-  local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
-  local side_length = (maxp.x - minp.x) + 1
-  local map_lengths_xyz = {x=side_length, y=side_length, z=side_length}
-  -- noises:
-  local bottom=minetest.get_perlin_map(layer.bot,map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z})
-  local localized={}
-  for _,loc in ipairs(layer.localized) do
-   --defaults and overrides
-   local np={ offset = 0, scale = 1, octaves = 1, persist = 0.7,
-    spread = {x=loc.spread, y=loc.height, z=loc.spread}, seed=loc.seed}
-   --get noise and content ids
-   table.insert(localized,
-   {
-    noise=minetest.get_perlin_map(np,map_lengths_xyz):get3dMap_flat(minp),
-    treshold=loc.treshold,
-    ctx= minetest.get_content_id(loc.primary),
-    ndn=loc.primary
-   })
-  end
-  local noise2d_ix = 1
-  local noise3d_ix = 1
-  print2("after noise: "..(os.clock()-timebefore))
-  for z=minp.z,maxp.z,1 do
-   for y=minp.y,maxp.y,1 do
-    for x=minp.x,maxp.x,1 do
-     local pos = area:index(x, y, z)
-     if  (y>bottom[noise2d_ix]) and (y<layer.top.offset)
-     and ( (nodes[pos]==stone_ctx) or (nodes[pos]==dirt_ctx) )
-     then
-      layer.stats.totalnodes=layer.stats.totalnodes+1
-      if nodes[pos]==stone_ctx then nodes[pos] = layer.primary.ctx end
-      for k,loc in pairs(localized) do
-       if ( loc.noise[noise3d_ix] > loc.treshold) then
-        nodes[pos]=loc.ctx
-        layer.stats.node[loc.ndn]=layer.stats.node[loc.ndn]+1
-        break
-       end
-      end
-     end
-     noise2d_ix=noise2d_ix+1
-     noise3d_ix=noise3d_ix+1
-    end
-    noise2d_ix=noise2d_ix-side_length
-   end
-   noise2d_ix=noise2d_ix+side_length
-  end
-  print2("after loop: "..(os.clock()-timebefore))
-  manipulator:set_data(nodes)
-  --manipulator:calc_lighting()
-  --manipulator:update_liquids()
-  if layer.debugging then 
-   manipulator:set_lighting({day=15,night=15})
-  end
-  manipulator:write_to_map()
-  print2("after commit: "..(os.clock()-timebefore))
-  layer.stats.count=layer.stats.count+1
-  layer.stats.total=layer.stats.total+(os.clock()-timebefore)
-  layer.stats.side=side_length
- end
-end
-
-local ignore_wherein=1
-
-rocksl.veingen=function(veins,minp,maxp,seed)
- local side_length=(maxp.y-minp.y)
- local random=PseudoRandom(seed-79)
- local timebefore=os.clock();
- local manipulator, emin, emax = minetest.get_mapgen_object("voxelmanip")
- local nodes = manipulator:get_data()
- local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
- local did_generate=nil
- for _,vein in ipairs(veins) do
-  if (minp.y<vein.maxy) and (maxp.y>vein.maxy) then
-   local vr2=vein.radius.average^2
-   local vrm=vein.radius.average+vein.radius.amplitude
-   local noise_map=minetest.get_perlin_map(
-    {
-     seed=-79,
-     scale=vein.radius.amplitude,
-     offset=0, octaves=1, persist=0.7,
-     spread={x=vein.radius.frequency, y=vein.radius.frequency, z=vein.radius.frequency}
-    },{x=(vrm*2)+1, y=(vrm*2)+1, z=(vrm*2)+1}
-   )
-   local iterations_count= (vein.rarity*side_length)^3
-   iterations_count=iterations_count+(random:next(0,100)/100)
-   local primary_ctx=minetest.get_content_id(vein.primary)
-   local wherein_ctx=minetest.get_content_id(vein.wherein)
-   --print("vein "..vein.primary.." ic="..iterations_count.." p="..primary_ctx.." w="..wherein_ctx)
-   for iteration=1, iterations_count do
-    local x0=minp.x+ random:next(0,side_length)
-    local y0=minp.y+ random:next(0,side_length)
-    local z0=minp.z+ random:next(0,side_length)
-    local noise=noise_map:get3dMap_flat({x=x0-vrm, y=y0-vrm, z=z0-vrm})
-    local noise_ix=1
-    local posi = area:index(x0, y0, z0)
-    if ignore_wherein or (nodes[posi]==wherein_ctx) then
-     --print("vein "..vein.primary.." @ "..x0..","..y0..","..z0.." vrm="..vrm)
-     did_generate=1
-     for x=-vrm, vrm do
-      for y=-vrm, vrm do
-       for z=-vrm, vrm do
-        local posc = {x=x+x0,y=y+y0,z=z+z0}
-        posi = area:index(posc.x, posc.y, posc.z)
-        local nv=noise[noise_ix]
-        if ((x^2)+(y^2)+(z^2))<((vein.radius.average+nv)^2) then
-         --minetest.set_node(posc, {name=vein.primary})
-         nodes[posi]=primary_ctx
-        end
-        noise_ix=noise_ix+1
-     end end end
-    else
-     --print("vein "..vein.primary.." bad environmnent -"..minetest.get_node({x0,y0,z0}).name.."="..nodes[posi])
-    end
-   end
-  end
- end
- if did_generate then
-  manipulator:set_data(nodes)
-  --manipulator:calc_lighting()
-  manipulator:write_to_map()
-  print("end veingen "..(os.clock()-timebefore))
- else
-  print("end veingen (nothin generated)")
- end
-end
-
--- ~ Tomas Brod

mineral/depends.txt

@@ -0,0 +1,2 @@
+rocks
+default

mineral/init.lua

@@ -0,0 +1,38 @@
+--
+-- The minerals mod.
+--
+
+minetest.log("info","/mineral mod initializing")
+
+-- Load translation library if intllib is installed
+
+if (minetest.get_modpath("intllib")) then
+	dofile(minetest.get_modpath("intllib").."/intllib.lua")
+	S = intllib.Getter(minetest.get_current_modname())
+	else
+	S = function ( s ) return s end
+end
+
+local function GetNoiseParams()
+ return {
+  scale=1, offset=0, seed=rocksl.GetNextSeed(), octaves=1, persist=1,
+  spread={ x=100, y=100, z=100 } }
+end
+
+mineral={}
+mineral.noise={}
+
+local print=function(text)
+ minetest.log("info","/mineral "..text)
+end
+
+local modpath=minetest.get_modpath(minetest.get_current_modname())
+
+mineral.noise.Copper=GetNoiseParams()
+mineral.noise.PbZn=GetNoiseParams()
+mineral.noise.Iron=GetNoiseParams()
+mineral.noise.Tin=GetNoiseParams()
+
+dofile(modpath.."/skarn.lua")
+dofile(modpath.."/pegmatite.lua")
+

mineral/pegmatite.lua

@@ -0,0 +1,42 @@
+--
+-- Pegmatite deposit
+--
+
+local function GetNoiseParams()
+ return {
+  scale=1, offset=0, seed=rocksl.GetNextSeed(), octaves=1, persist=1,
+  spread={ x=100, y=100, z=100 } }
+end
+
+-- ores have to be redefined for pegmatite background
+
+--   Ore/Mineral    Percent
+-- Spodumene        7%
+-- Muscovite (mica) 7%
+-- Kyanite          5%
+-- Lepidolite       2.5%
+-- Tantalite        2%
+-- Cassiterite      1.5%
+-- Wolframite       1%
+-- Pollucite        0.1%
+
+
+-- Cassiterite
+minetest.register_node( "mineral:pegmatite_cassiterite", {
+	description = S("Cassiterite"),
+	tiles = { "rocks_Pegmatite.png^mineral_cassiterite.png" },
+	groups = {cracky=3},
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_ore({
+ wherein="rocks:pegmatite",
+ ore="mineral:pegmatite_cassiterite",
+ clust_size=3,
+ clust_num_ores=9,
+ clust_scarcity=4^3,
+ noise_treshold=-0.1,
+ noise_params=mineral.noise.Tin
+ })
+
+-- ~ Tomas Brod

mineral/skarn.lua

@@ -0,0 +1,123 @@
+--
+-- Skarn deposit
+--
+
+-- ores have to be redefined for skarn background
+
+-- Chalcopyrite
+minetest.register_node( "mineral:skarn_chalcopyrite", {  
+	description = S("Chalcopyrite"),
+	tiles = { "rocks_Skarn.png^mineral_Chalcopyrite.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Malachyte
+minetest.register_node( "mineral:skarn_malachyte", {  
+	description = S("Malachyte"),
+	tiles = { "rocks_Skarn.png^mineral_Chalcopyrite.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Chalcopyrite/Malachyte skarn mix
+minetest.register_ore({
+ wherein="rocks:skarn",
+ ore="mineral:skarn_chalcopyrite",
+ clust_size=3,
+ clust_num_ores=12,
+ clust_scarcity=4^3,
+ noise_treshold=0.333,
+ noise_params=mineral.noise.Copper
+ })
+minetest.register_ore({
+ wherein="rocks:skarn",
+ ore="mineral:skarn_malachyte",
+ clust_size=3,
+ clust_num_ores=11,
+ clust_scarcity=4^3,
+ noise_treshold=0.333,
+ noise_params=mineral.noise.Copper
+ })
+
+-- Sphalerite
+minetest.register_node( "mineral:skarn_sphalerite", {  
+	description = S("Sphalerite"),
+	tiles = { "rocks_Skarn.png^mineral_sphalerite.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Galena
+minetest.register_node( "mineral:skarn_galena", {  
+	description = S("Galena"),
+	tiles = { "rocks_Skarn.png^mineral_galena.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Pb Zn skarn mix
+minetest.register_ore({
+ wherein="rocks:skarn",
+ ore="mineral:skarn_sphalerite",
+ clust_size=3,
+ clust_num_ores=9,
+ clust_scarcity=4^3,
+ noise_treshold=0.38,
+ noise_params=mineral.noise.PbZn
+ })
+minetest.register_ore({
+ wherein="rocks:skarn",
+ ore="mineral:skarn_galena",
+ clust_size=3,
+ clust_num_ores=10,
+ clust_scarcity=4^3,
+ noise_treshold=0.38,
+ noise_params=mineral.noise.PbZn
+ })
+   -- marble and hornfels, as well as unchanged limestone.
+   -- { ore="rocks:marble", percent=10 },
+   -- { ore="rocks:hornfels", percent=10 },
+   -- { ore="rocks:skarn_galena", percent=25 },
+   -- { ore="rocks:skarn_sphalerite", percent=25 },
+
+-- Magnetite
+minetest.register_node( "mineral:skarn_magnetite", {  
+	description = S("Magnetite"),
+	tiles = { "rocks_Skarn.png^mineral_Magnetite.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Fe skarn mix
+minetest.register_ore({
+ wherein="rocks:skarn",
+ ore="mineral:skarn_magnetite",
+ clust_size=3,
+ clust_num_ores=13,
+ clust_scarcity=4^3,
+ noise_treshold=0.3,
+ noise_params=mineral.noise.Iron
+ })
+   -- marble and hornfels, as well as unchanged limestone.
+   -- { ore="rocks:marble", percent=10 },
+   -- { ore="rocks:hornfels", percent=10 },
+   -- { ore="rocks:skarn_magnetite", percent=40 },
+
+-- Magnesite
+minetest.register_node( "mineral:skarn_magnesite", {
+	description = S("Magnesite"),
+	tiles = { "rocks_Skarn.png^mineral_Magnesite.png" },
+	groups = {cracky=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- Vermiculite (fixme: move to CommonRocks)
+minetest.register_node( "mineral:vermiculite", {
+	description = S("Vermiculite"),
+	tiles = { "mineral_Vermiculite.png" },
+	groups = {crumbly=3}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+-- magnesite/vermiculite skarn mix
+   -- marble and hornfels, as well as unchanged limestone.
+   -- { ore="rocks:marble", percent=10 },
+   -- { ore="rocks:hornfels", percent=10 },
+   -- { ore="rocks:skarn_magnesite", percent=30 },
+   -- { ore="rocks:vermiculite", percent=20 },
+
+-- ~ Tomas Brod

modpack.txt

@@ -0,0 +1 @@
+# This is now a modpack, for you to ask why :)

rocks/gensed.lua

@@ -0,0 +1,205 @@
+-- experimental sedimentary layer generator
+
+local np_elv = {
+ offset = 0, octaves = 2, persist = 0.4,
+ scale = 8,
+ spread = {x=25, y=25, z=25},
+ seed = -546,
+}
+local np_typ1 = {
+ offset = 0, octaves = 2, persist = 0.33,
+ scale = 1,
+ spread = {x=50, y=50, z=50},
+ seed = -5500,
+}
+local np_typ2 = {
+ offset = 0, octaves = 2, persist = 0.33,
+ scale = 1,
+ spread = {x=70, y=70, z=70},
+ seed = -5472,
+}
+local np_vc = {
+ offset = 0, octaves = 2, persist = 0.33,
+ scale = 1,
+ spread = {x=100, y=100, z=100},
+ seed = 749,
+}
+local np_sp = {
+ offset = 0, octaves = 2, persist = 0.33,
+ scale = 1,
+ spread = {x=150, y=150, z=150},
+ seed = -1284,
+}
+
+local stats
+stats={ total=0 }
+
+rocksl.gensed = function (minp, maxp, seed, vm, area)
+ local t1 = os.clock()
+ local data = vm:get_data()
+
+ local chunksize = maxp.x - minp.x + 1
+ local pmapsize = {x = chunksize, y = chunksize, z = chunksize}
+ local minpxz = {x = minp.x, y = minp.z}
+ local c_stone= minetest.get_content_id("default:stone")
+ local c_dwg= c_stone
+
+ local sla = {
+  {min=18, sd=169},
+  {min=9, sd=324},
+  {min=0, sd=-230},
+  {min=-6, sd=850},
+  {min=-12, sd=-643},
+  {min=-18, sd=0},
+ }
+ if minp.y<(sla[#sla].min-10) then return end
+ local biomes = {
+  lava={ mod="default" },
+  nyancat={ mod="default" },
+  wood={ mod="default" },
+  gravel={ mod="default" },
+  sand={ mod="default" },
+  sandstone={ mod="default" },
+  clay={ mod="default" },
+  claystone={ mod="rocks" },
+  slate={ mod="rocks" },
+  conglomerate={ mod="rocks" },
+  mudstone={ mod="rocks" },
+  limestone={ mod="rocks" },
+  blackcoal={ mod="rocks" },
+  lignite={ mod="rocks" },
+  anthracite={ mod="rocks" },
+ }
+ for k,v in pairs(biomes) do
+  v.ctx=v.ctx or minetest.get_content_id(v.mod..":"..k)
+  if stats and (stats[k]==nil) then stats[k]=0 end
+ end
+ n_elv= minetest.get_perlin_map(np_elv, pmapsize) : get2dMap_flat(minp)
+ 
+ local generated
+ local nixz= 0
+ local nixyz= 0
+ for z=minp.z, maxp.z do for x=minp.x, maxp.x do
+  nixz= nixz+1
+  -- loop
+  local bi
+  local li
+  for y=maxp.y, minp.y, -1 do
+   nixyz=nixyz+1
+   local di=area:index(x,y,z)
+   local yn=y +n_elv[nixz]
+   if (data[di]==c_stone) and ((not bi)or(yn<sla[li].min)) then
+    -- go to deeper layer
+    if not li then li=1 end
+    while (li<=#sla)and(sla[li].min>yn) do
+     li=li+1
+    end
+    -- create noises for this layer
+    if li>#sla then break end -- break y loop if too low
+    if (not sla[li].n_tp1) then
+     local altminpxz={ x=minp.x+sla[li].sd,
+                          y=minp.z-sla[li].sd}
+     sla[li].n_tp1= minetest.get_perlin_map(np_typ1, pmapsize) : get2dMap_flat(altminpxz)
+     sla[li].n_tp2= minetest.get_perlin_map(np_typ2, pmapsize) : get2dMap_flat(altminpxz)
+     sla[li].n_vc= minetest.get_perlin_map(np_vc, pmapsize) : get2dMap_flat(altminpxz)
+     sla[li].n_sp= minetest.get_perlin_map(np_sp, pmapsize) : get2dMap_flat(altminpxz)
+    end
+  -- BEGIN geome resolution
+  local vcva= math.abs(sla[li].n_vc[nixz])
+  local vcv= sla[li].n_vc[nixz]
+  local spv= sla[li].n_sp[nixz]
+  local tp=1 --=particulates, 2=biosediments, 3=chemosediments, 4=vulcanosediments
+  if sla[li].n_tp1[nixz]>0.2 then tp=2
+   if sla[li].n_tp2[nixz]>0.81 then tp=4 end
+  elseif sla[li].n_tp2[nixz]>0.76 then tp=3 end
+
+  if tp==1 then
+   -- particulates
+   if vcva>0.453 then
+    -- clay-(0,stone,slate)
+    if spv>0.23 then bi="slate"
+    elseif spv>-0.2 then bi="claystone"
+    else bi="clay" end
+   elseif vcva>0.4 then
+    bi="mudstone"
+   elseif vcva>0.2 then
+    -- sand-(0,stone)
+    if spv>-0.3 then bi="sandstone" else bi="sand" end
+   else
+    -- gravel/conglomerate
+    if spv>-0.34 then bi="conglomerate" else bi="gravel" end
+    -- breccia?
+   end
+  elseif tp==2 then
+   -- biosediments
+   if vcv>0.05 then
+    bi="limestone"
+   elseif vcv>-0.1 then
+    --uhlia
+    if spv>0.7 then bi="anthracite"
+    elseif spv>0 then bi="blackcoal"
+    else bi="lignite" end
+   else
+    --ine
+    bi="wood"
+   end
+  end
+
+  -- END geome resolution
+
+    if not bi then bi="nyancat" end
+    generated=true
+   end
+   if (data[di]==c_stone) then
+    data[di]=biomes[bi].ctx
+    if stats then stats.total=stats.total+1 stats[bi]=stats[bi]+1 end
+   end
+  end
+ end end
+ if generated then
+  vm:set_data(data)
+  if stats then for k,v in pairs(stats) do  print("stat: "..k..": "..((v/stats.total)*100).."%") end end
+ else
+  print("no sed layer y="..minp.y)
+ end
+ minetest.log("action", "rocks/gensed/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end
+
+minetest.register_node( "rocks:slate", {
+	description = S("Slate"),
+	tiles = { "rocks_Slate.png" },
+	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
+	groups = {cracky=3},
+})
+minetest.register_node( "rocks:claystone", {
+	description = S("Claystone"),
+	tiles = { "rocks_claystone.png" },
+	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
+	groups = {crumbly=1, cracky=3},
+})
+
+minetest.register_node( "rocks:conglomerate", {
+	description = S("Conglomerate"),
+	tiles = { "rocks_conglomerate.png" },
+	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
+	groups = {crumbly=3},
+})
+
+minetest.register_node( "rocks:lignite", {
+	description = S("Lignite coal"),
+	tiles = { "rocks_Mudstone.png^rocks_lignite.png" },
+	is_ground_content = true,
+	groups = {crumbly=3},
+})
+minetest.register_node( "rocks:blackcoal", {
+	description = S("Black coal"),
+	tiles = { "rocks_Mudstone.png^default_mineral_coal.png" },
+	is_ground_content = true,
+	groups = {crumbly=3},
+})
+minetest.register_node( "rocks:anthracite", {
+	description = S("Anthracite coal"),
+	tiles = { "rocks_Mudstone.png^rocks_anthracite.png" },
+	is_ground_content = true,
+	groups = {crumbly=3},
+})

rocks/ign.lua

@@ -0,0 +1,143 @@
+--
+-- Igneous Layer
+--
+
+-- Basalt       Ex/Mafic   hard  same as diorite, byt limit=0.5
+minetest.register_node( "rocks:basalt", {  
+	description = S("Basalt"),
+	tiles = { "rocks_Basalt.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+minetest.register_alias("mapgen_stone", "rocks:basalt")
+
+-- ^ does not work. Seems we can not overwrite an alias.
+-- If the alias in default/mapgen.lua is deleted, this works.
+
+-- more rock defs
+minetest.register_node( "rocks:granite", {  
+	description = S("Granite"),
+	tiles = { "rocks_wgr.png" },
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+	groups = {cracky=3, stone=1}, 
+})
+minetest.register_node( "rocks:diorite", {  
+	description = S("Diorite"),
+	tiles = { "rocks_Diorite.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+minetest.register_node( "rocks:gabbro", {  
+	description = S("Gabbro"),
+	tiles = { "rocks_Gabbro.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+
+local reg=function(name,param)
+ minetest.register_ore({
+   ore    = name,
+   wherein= param.inr,
+   ore_type       = "scatter",
+   clust_scarcity = 10^3,
+   clust_num_ores = 20^3,
+   clust_size     = 20,
+   height_min     = -31000,
+   height_max     = 28,
+   noise_threshhold=param.treshold,
+   noise_params={
+          offset = 0, scale = 1, octaves = 1, persist = 0.5,
+          spread = {x=param.spread, y=param.height, z=param.spread},
+          seed=rocksl.GetNextSeed(),
+        },
+        })
+end
+rocks.register_igneous_stratus=reg
+
+-- vein stuff
+
+local regv=function(name,param)
+ minetest.register_ore({
+   ore    = name,
+   wherein= param.wherein,
+   ore_type       = "blob",
+   clust_scarcity = param.rarity^3,
+   clust_num_ores = 8,
+   clust_size     = param.radius.average*2,
+   height_min     = -31000,
+   height_max     = 50,
+   noise_threshhold = 0.5, --< determined experimentally
+   noise_params={
+          offset = 1-param.radius.amplitude, scale = param.radius.amplitude, octaves = 3, persist = 0.5,
+          spread = {x=param.radius.frequency, y=param.radius.frequency, z=param.radius.frequency},
+          seed=rocksl.GetNextSeed(),
+        },
+  })
+end
+
+rocks.register_vein=regv
+
+local np_layer = {
+ offset = 0, octaves = 3, persist = 0.46,
+ scale = 30,
+ spread = {x=500, y=500, z=500},
+ seed = -5500,
+}
+local np_intr = {
+ octaves = 3, persist = 0.46,
+ scale = 20,
+ offset = -15,
+ spread = {x=100, y=100, z=100},
+ seed = 3740,
+}
+
+--minetest.register_on_generated( function( minp, maxp, seed )
+rocksl.genign=function(minp,maxp,seed, vm, area)
+ local t1 = os.clock()
+ local data = vm:get_data()
+
+ local chunksize = maxp.x - minp.x + 1
+ local pmapsize = {x = chunksize, y = chunksize, z = 1}
+ local pmapminpxz = {x = minp.x, y = minp.z}
+ local c_stone= minetest.get_content_id("default:stone")
+ local layers= { 
+             { min=-100, node="rocks:granite" },
+             { min=-240, node="rocks:diorite"},
+             { node="rocks:gabbro", min=-700},
+            }
+ for k,v in pairs(layers) do
+  v.ctx=minetest.get_content_id(v.node)
+ end
+ local layers_no=#layers
+ local n_layer= minetest.get_perlin_map(np_layer, pmapsize) : get2dMap_flat(pmapminpxz)
+ local n_intr= minetest.get_perlin_map(np_intr, pmapsize) : get2dMap_flat(pmapminpxz)
+ local nixz= 1
+ 
+ for z=minp.z, maxp.z do for x=minp.x, maxp.x do
+  -- loop
+  for y=minp.y, maxp.y do
+   local di=area:index(x,y,z)
+   local yn=y+n_layer[nixz]
+   local vintr=n_intr[nixz]
+   if vintr<1 then vintr=1 end
+   if data[di]==c_stone then
+    yn=yn*vintr -- vertical intrusion
+    for li=1, layers_no do
+     if yn > layers[li].min then
+      data[di]=layers[li].ctx
+      break
+     end
+    end
+   end
+  end
+  nixz= nixz+1
+ end end
+
+ vm:set_data(data)
+ --DEBUG: vm:set_lighting({day=15,night=2})
+ minetest.generate_ores(vm)
+ minetest.log("action", "rocks/layer/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end
+
+
+-- ~ Tomas Brod

rocks/init.lua

@@ -0,0 +1,49 @@
+minetest.log("info","[rocks] mod initializing")
+
+-- Load translation library if intllib is installed
+
+if (minetest.get_modpath("intllib")) then
+	dofile(minetest.get_modpath("intllib").."/intllib.lua")
+	S = intllib.Getter(minetest.get_current_modname())
+	else
+	S = function ( s ) return s end
+end
+
+rocks={}
+rocksl={}
+
+rocksl.print=function(text)
+ minetest.log("info","/rocks "..text)
+end
+
+rocksl.seedprng=PseudoRandom(763)
+rocksl.GetNextSeed=function()
+ return rocksl.seedprng:next()
+end
+
+minetest.clear_registered_ores()
+
+local modpath=minetest.get_modpath(minetest.get_current_modname())
+
+dofile(modpath.."/sed.lua")
+dofile(modpath.."/ign.lua")
+dofile(modpath.."/skarn.lua")
+dofile(modpath.."/pegmatite.lua")
+dofile(modpath.."/gensed.lua")
+dofile(modpath.."/pipes.lua")
+dofile(modpath.."/veins.lua")
+
+minetest.register_on_generated(function(minp,maxp,seed)
+ local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+ local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+ local pr=PseudoRandom(seed)
+ rocksl.gensed(minp,maxp,seed,vm,area)
+ --rocksl.genign
+ rocksl.genvein(minp,maxp,pr,vm,area)
+ for _,pipe in pairs(rocks.pipes) do rocksl.genpipe(minp,maxp,pr,vm,area,pipe) end
+ vm:write_to_map(data)
+end)
+
+minetest.register_on_mapgen_init(function(mapgen_params)
+ -- todo: disable caves and ores
+end)

rocks/pegmatite.lua

@@ -0,0 +1,24 @@
+--
+-- Pegmatite vein
+--
+
+local CommonRarity=45
+
+minetest.register_node( "rocks:pegmatite", {
+	description = S("Pegmatite"),
+	tiles = { "rocks_Pegmatite.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+
+-- ores have to be redefined for pegmatite background
+
+-- pegmatites are only 1 kind
+rocks.register_vein("rocks:pegmatite",{
+  wherein={ "rocks:granite" },
+  miny=-160, maxy=20,
+  radius={ average=18, amplitude=0.3, frequency=16 },
+  density=80, rarity=CommonRarity,
+  ores={
+  }
+ })

rocks/pipes.lua

@@ -0,0 +1,96 @@
+-- experimental slow pipe generator
+
+local function brush(data,area,pos,radius,content,ores,pr)
+ local rsq=radius^2
+ local orect
+ local oresc
+ radius=radius+2
+   for _,ore in pairs(ores) do
+    if pr:next(0,ore.scarcity)==0 then
+     orect=ore.c_ore
+     oresc=ore.density
+    end
+   end
+ for x=-radius, radius do
+ for y=-radius, radius do
+ for z=-radius, radius do
+  if (x^2)+(y^2)+(z^2)<=rsq then
+   local di=area:index(x+pos.x,y+pos.y,z+pos.z)
+   if oresc and (pr:next(0,oresc)==0) then 
+    data[di]=orect
+   else
+    data[di]=content
+   end
+  end
+ end end end
+end
+
+-- the public table of registered pipes
+rocks.pipes={}
+local examplepipe={
+ bedrock={ "rocks:limestone" },
+ startrock={ "rocks:limestone" },
+ ymin=-200, ymax=-6,
+ scarcity=80,
+ radius=3,
+ content="default:wood",
+ scatter=
+ {
+  { scarcity=7, density=4, ore="default:mese", cnt=0},
+ },
+}
+table.insert(rocks.pipes,examplepipe)
+--profiling
+table.insert(rocks.pipes,{
+ bedrock={ "rocks:limestone" },
+ startrock={ "rocks:limestone" },
+ ymin=-200, ymax=-6,
+ scarcity=80,
+ radius=3,
+ content="default:dirt",
+ scatter=
+ {
+  { scarcity=5, density=4, ore="default:mese", cnt=0},
+ },
+})
+
+rocksl.genpipe=function(minp,maxp,pr,vm,area,descr)
+ local t1 = os.clock()
+ local data = vm:get_data()
+
+ local chunksizer = maxp.x - minp.x + 1
+ local chunksize = chunksizer + 1
+ local pmapsize = {x = chunksize, y = chunksize, z = chunksize}
+ local minpxz = {x = minp.x, y = minp.z}
+ 
+ local bedrocks={}
+ for _,node in pairs(descr.bedrock) do bedrocks[minetest.get_content_id(node)]=true end
+ local startrocks={}
+ for _,node in pairs(descr.startrock) do startrocks[minetest.get_content_id(node)]=true end
+ local content=minetest.get_content_id(descr.content)
+ for _,des in pairs(descr.scatter) do 
+  des.c_ore=minetest.get_content_id(des.ore)
+ end
+ local orepr=PseudoRandom(pr:next())
+
+ local numpipes_raw=(chunksize/descr.scarcity)
+ local numpipes = math.floor(numpipes_raw + (pr:next(0,99)/100))
+
+ for vc=1, numpipes do
+  local pointA=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  if (#startrocks>0)and(startrocks[data[area:indexp(pointA)]]==nil) then break end
+  local pointB=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local pointC=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local step=(1.8*descr.radius)/(vector.distance(pointA,pointB)+vector.distance(pointB,pointC))
+  for t=0, 1, step do
+   local p=vector.multiply(pointA,(1-t)^2)
+   p=vector.add(p, vector.multiply(pointB,2*t*(1-t)) )
+   p=vector.add(p, vector.multiply(pointC,t*t) )
+   p=vector.round(p)
+   brush(data,area,p,descr.radius,content,descr.scatter,orepr)
+  end
+ end
+
+ vm:set_data(data)
+ minetest.log("action", "rocks/genpipe/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end

rocks/sed.lua

@@ -0,0 +1,185 @@
+--
+-- Sedimentary Layer
+--
+
+-- Mudstone     Sed        soft  Ocean, beach, river, glaciers
+minetest.register_node( "rocks:mudstone", {  
+	description = S("Mudstone"),
+	tiles = { "rocks_Mudstone.png" },
+	groups = {cracky=1, crumbly=3}, 
+	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
+})
+-- more rock defs
+minetest.register_node( "rocks:limestone", {  
+	description = S("Limestone"),
+	tiles = { "rocks_Limestone.png" },
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+	groups = {cracky=2},
+})
+minetest.register_node( "rocks:laterite", {
+	description = S("Laterite clay"),
+	tiles = { "rocks_laterite.png" },
+	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
+	groups = {crumbly=3},
+})
+
+local beach_max=4
+local lowland_max=27
+local highland_max=200
+local beach_min=-7
+local lowland_min=5
+local highland_min=28
+
+do
+ -- Modify default grassland biome
+ local grassland=minetest.registered_biomes["default:grassland"] or
+  { -- default biome, if no biome mod is installed
+   name = "rocks:grassland",
+   node_top = "air",
+   depth_top = 0,
+   depth_filler=0,
+   y_min = lowland_min,
+   y_max = lowland_max,
+   heat_point = 50,
+   humidity_point = 50,
+  }
+  local mountains={ -- default mountain biome
+                name = "rocks:mountain",
+                node_top = "default:dirt_with_grass",
+                depth_top = 1,
+                node_filler = "default:dirt",
+                depth_filler = 2,
+                node_stone = nil,
+                y_min = highland_min,
+                y_max = highland_max,
+                heat_point = 50,
+                humidity_point = 50,
+  }
+  -- The biome layers are: dust, top, filler, stone
+  -- On beach: dust, shore_top, shore_filler, underwater
+  -- coastside: dust, top, filler, shore_filler, underwater, stone
+ if #minetest.registered_biomes > 1 then
+  minetest.log("error","Biomes registered before [rocks] discarded, please depend the mod on 'rocks' to fix this.")
+  -- can't just re-register them here, cause clear_biomes also clears decorations
+ end
+ minetest.clear_registered_biomes()
+ -- hook to inject our sedimentary stone to new biomes
+ local old_register_biome=minetest.register_biome
+ minetest.register_biome=function(def)
+  --print("[rocks] register_biome .name="..def.name)
+  for n,v in pairs(def) do
+   --if type(v)~="table" then print("   "..n.."="..v) end
+  end
+  local cor=false -- was the biomeheight patched?
+  local tl=3 -- tolerance  in determining biome type based on y_min/max values
+  local btype -- biome type (:string)
+  if (def.y_max>3000) and (def.y_min<=highland_min)  then
+   -- correct upper boundary of registered bimes
+   if (def.y_min<10) and (def.y_min>0) then def.y_max=lowland_max cor=true end
+   if (def.y_min<30) and (def.y_min>10) then def.y_max=highland_max cor=true end
+   minetest.log("action","/rocks correcting upper bound on biome "..def.name.." to "..def.y_max)
+  end
+  -- actual detection code
+  if def.node_stone=="default:desert_stone" then btype="desert"
+  elseif (def.y_min>beach_min-tl) and (def.y_max<beach_max+tl) then btype="beach"
+  elseif (def.y_min>0) and (def.y_max<lowland_max+tl) then btype="lowland"
+  elseif (def.y_min>highland_min-tl) and (def.y_max<highland_max+tl) then btype="highland"
+  elseif (def.y_min<-3000) and (def.y_max<lowland_min+tl) then btype="ocean"
+  else minetest.log("error", "/rocks could not guess elevation type for biome "..def.name) end
+  rocksl.print("register_biome .name="..def.name.." -> btype="..btype)
+  -- patch the new biomes with our rocks
+  if btype=="lowland" then
+   --def.node_filler="rocks:mudstone"
+   --def.depth_filler=11
+   --def.node_stone="rocks:granite"
+   if (def.humidity_point>80) and (def.heat_point>80) then
+    --def.node_filler="rocks:laterite"
+   end
+  elseif btype=="highland" then
+   def.node_filler="rocks:limestone"
+   def.node_stone="rocks:limestone"
+   def.depth_filler=15
+  elseif btype=="beach" then
+   def.node_stone="rocks:granite"
+   def.y_min=beach_min
+   if def.heat_point<50 then
+    def.node_top="default:gravel"
+    def.node_filler="default:gravel"
+    def.depth_filler=2
+   elseif def.node_top=="default:sand" then
+    if def.depth_top<2 then def.depth_top=3 end
+    def.node_filler="default:sandstone"
+    def.depth_filler=5
+   end
+  elseif btype=="ocean" then
+   def.node_stone="rocks:basalt"
+   def.node_top="default:gravel"
+   def.node_filler="rocks:limestone"
+  end
+  do -- deactivate the added and removed shore-thing of MGv7
+   -- to fix weirid sand layers underground
+   def.node_shore_top=def.node_top
+   def.node_shore_filler=def.node_filler
+   def.node_underwater=def.node_top
+  end
+  -- and call the saved method to actually do the registration
+  old_register_biome(def)
+ end
+ --now register the default grassland
+ minetest.register_biome(grassland)
+ -- create a default mountain biome...
+ minetest.register_biome(mountains)
+ -- hook the clear callback (fix biomesdev)
+ local old_clear=minetest.clear_registered_biomes
+ minetest.clear_registered_biomes=function()
+  old_clear()
+  minetest.log("action","/rocks re-registering default mountain biome!")
+  minetest.register_biome(mountains)
+ end
+end
+
+-- more biomes
+ -- todo: mountains, alps, volcanos
+
+
+
+local reg=function(name,param)
+ minetest.register_ore({
+  ore=name,
+  wherein= { 
+         "rocks:mudstone",
+         },
+  ore_type         = "scatter",
+  clust_scarcity   = 8^3,
+  clust_size       = 10,
+  clust_num_ores   = 10^3,
+  y_min            = -20,
+  y_max            = 40,
+  noise_threshhold = param.treshold,
+  noise_params     = {
+          offset=0, scale=1, octaves=1, persist=0.3,
+          spread={x=param.spread, y=param.height, z=param.spread},
+          seed=rocksl.GetNextSeed(),
+                     },
+ })
+end
+
+-- this does register a new sedimentary vein.
+rocks.register_sedimentary=reg
+
+-- follows the only thing remaining from old ver :)
+
+--               Sedimentary rock hardness and distribution
+--    Rock      Hard                      Distribution
+--Breccia      Weak   Localized continental, folded
+-->Claystone    Weak   Localized continental, folded, oceanic
+--Conglomerate Weak   Localized continental, folded
+-->Limestone    Medium Localized continental, folded; primary oceanic, hills
+-->Coal         -      Large beds, twice as common in swamps
+ --reg("rocks:limestone",    { spread=64, height=32, treshold=0.35 })
+ --reg("rocks:breccia",  { spread=64, height=32, treshold=0.6 })
+ --reg("rocks:conglomerate", { spread=64, height=32, treshold=0.6 })
+ --reg("default:stone_with_coal", { spread=64, height=14, treshold=0.58 })
+ --reg("default:clay",{ spread=48, height=14, treshold=0.55 })
+
+-- ~ Tomas Brod

rocks/skarn.lua

@@ -0,0 +1,30 @@
+--
+-- Skarn deposit
+--
+
+local CommonRarity=40 --too high... should be like 76
+local CommonRadius=10
+local CommonWherein={ "rocks:granite", "rocks:limestone" }
+
+minetest.register_node( "rocks:skarn", {  
+	description = S("Skarn"),
+	tiles = { "rocks_Skarn.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+
+-- skarn deposit
+rocks.register_vein("rocks:skarn",{
+  wherein=CommonWherein,
+  miny=-320, maxy=300,
+  radius={ average=CommonRadius, amplitude=0.16, frequency=8 },
+  density=80, rarity=CommonRarity,
+ })
+
+   -- Todo:
+   -- There is also a chance of isolated lapis crystals, Gold
+   -- Molybdenite with Cu
+   -- wollastonite with Fe
+   -- enrichments: scheelite and wollastonite
+
+-- ~ Tomas Brod

rocks/textures/geologica.txt

@@ -11,3 +11,9 @@ rocks_Peridotite.png
 rocks_Rhyolite.png
 rocks_Schist.png
 rocks_Slate.png
+rocks_Skarn.png
+rocks_laterite.png
+rocks_claystone.png
+rocks_conglomerate.png
+rocks_anthracite.png
+rocks_lignite.png

rocks/veins.lua

@@ -0,0 +1,47 @@
+-- experimental fast vein generator
+
+
+rocksl.genvein=function(minp,maxp,pr,vm,area)
+ local t1 = os.clock()
+ local data = vm:get_data()
+
+ local chunksizer = maxp.x - minp.x + 1
+ local chunksize = chunksizer + 1
+ local pmapsize = {x = chunksize, y = chunksize, z = chunksize}
+ local minpxz = {x = minp.x, y = minp.z}
+ local c_sample=minetest.get_content_id("default:stone")
+ local c_sample_ore=minetest.get_content_id("default:mese")
+ 
+
+  local A=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local B=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local C=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local D=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
+  local l1=vector.distance(A,C)+vector.distance(C,B)
+  local l2=vector.distance(A,D)+vector.distance(D,B)
+  local step=1.4/math.max(l1,l2)
+  print("step="..step.." l1="..l1.." l2="..l2)
+  local scarcity=6
+  local ocn=pr:next(0,scarcity)+(scarcity/2)
+  for t=0, 1, step do
+   local P=vector.multiply(A,(1-t)^2)
+   P=vector.add(P, vector.multiply(B,t*t) )
+   local Q=vector.add(P, vector.multiply(D,2*t*(1-t)) )
+   P=vector.add(P, vector.multiply(C,2*t*(1-t)) )
+   local step2=1/vector.distance(P,Q)
+   for u=0, 1, step2 do
+    local R=vector.add(vector.multiply(P,(1-u)), vector.multiply(Q,u) )
+    local di=area:indexp(vector.round(R))
+    if ocn<1 then
+     data[di]=c_sample_ore
+     ocn=pr:next(0,scarcity)+(scarcity/2)
+    else
+     data[di]=c_sample
+     ocn=ocn-1
+    end
+   end
+  end
+
+ vm:set_data(data)
+ minetest.log("action", "rocks/genvein/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end

sed.lua

@@ -1,68 +0,0 @@
---
--- Sedimentary Layer
---
-
-local sed={
- top={
-  offset = 20, scale = 0,
-  spread = {x=80, y=80, z=80},
-  octaves = 0, persist = 0 },
- bot={
-  offset = -16, scale = 10, seed=rocksl.GetNextSeed(),
-  spread = {x=80, y=80, z=80},
-  octaves = 2, persist = 0.7 },
- primary={ name="rocks:mudstone" },
- localized={},
- stats={ count=0, total=0, node={}, totalnodes=0 },
- debugging=nil
-}
-
--- Mudstone     Sed        soft  Ocean, beach, river, glaciers
-minetest.register_node( "rocks:mudstone", {  
-	description = S("Mudstone"),
-	tiles = { "rocks_Mudstone.png" },
-	groups = {cracky=1, crumbly=3}, 
-	is_ground_content = true, sounds = default.node_sound_dirt_defaults(),
-})
-
--- more rock defs
-minetest.register_node( "rocks:limestone", {  
-	description = S("Limestone"),
-	tiles = { "rocks_Limestone.png" },
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-	groups = {cracky=2},
-})
-
-
-local reg=function(name,param)
- rocksl.register_stratus(sed,name,param)
-end
-
-rocks.register_sedimentary=reg
-
---               Sedimentary rock hardness and distribution
---    Rock      Hard                      Distribution
---Breccia      Weak   Localized continental, folded
--->Claystone    Weak   Localized continental, folded, oceanic
---Conglomerate Weak   Localized continental, folded
--->Limestone    Medium Localized continental, folded; primary oceanic, hills
--->Coal         -      Large beds, twice as common in swamps
- reg("rocks:limestone",    { spread=64, height=32, treshold=0.36 })
- --reg("rocks:breccia",  { spread=64, height=32, treshold=0.6 })
- --reg("rocks:conglomerate", { spread=64, height=32, treshold=0.6 })
- reg("default:stone_with_coal", { spread=48, height=14, treshold=0.40 })
- reg("default:clay",{ spread=48, height=14, treshold=0.50 })
-
-minetest.register_on_generated(function(minp, maxp, seed)
- rocksl.layergen(sed,minp,maxp,seed)
-end)
-
-minetest.register_on_shutdown(function()
- if (sed.stats.count==0) then rocksl.print("[rocks](sed) stats not available, no chunks generated") return end
- rocksl.print("[rocks](sed) generated total "..sed.stats.count.." chunks in "..sed.stats.total.." seconds ("..(sed.stats.total/sed.stats.count).." seconds per "..sed.stats.side.."^3 chunk)")
- for name,total in pairs(sed.stats.node) do
-  rocksl.print("[rocks](sed) "..name..": "..total.." nodes placed ("..(total*100)/(sed.stats.totalnodes).." %)")
- end
-end)
-
--- ~ Tomas Brod