Very old thing that I forgot to commit.

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

@@ -1,110 +1,145 @@
-Geological layer generator for [Minetest] "rocks"
+Geological layer generator for Minetest "rocks" {wip}
 =============
 
 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: [https](https://gitorious.org/mt/rocks.git)
+* 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
 -------------
 
 How the underground is generated: *todo*.
 
-Underground is divided into horizontal layers. Bottom of each layer is at 
+Mod has been rewritten, so no doc yet.
-fixed height and moved up or down by 2d perlin noise.
 
-In every layer there can be multiple veins. Veins are blob-shaped volumes 
+The sedimentary layer
-of different rocks. Borders of vein are defined by 3d perlin noise. Veins 
+-------------
-often contain ores.
 
-In every vein, ores are distributed randomly. Some ores 
+Is implemented by modifiing MGv7 biomes to use rocks's sedimentary rocks. 
-may occur in specific areas of the vein (where noise is higher than 
+This means that you need mapgen v7 enabled. I also suggest enabling caves 
-treshold) or distributed randomly in specific amount (chance based on 
+and dungeons, as they are cool. 
-pseudorandom number) or combination of both.
 
-There is 1 2d perlin noise per layer, 1 3d perlin noise per vein and 1 
+Soil is normlly 50-70 cm deep in real life, so I made soil (dirt) only 1 
-pseudorandom number generator per ore.
+block thick. Under this thin layer of dirt an sedimentary layer is located. 
+In RL, there is clay and other stuff.
 
-Modding Interface
+There are various types of sedimentary rock. They are generated according 
------------------
+to 2D noises described below.
 
-"Rocks" exposes api to add new ores, veins and layers. The api is defined 
+types = Clastic, Biochemical,  Chemical, Vulcano/Other
-in [register](register.lua).
 
-### Register layer
+| X      | tp2<0.76     | tp2>0.7 |
+|--------|--------------|--------|
+| tp1<0.2 |   Clastic    |  Chemical |
+| tp1>0.2 | BioChemical  |  Vu/Ot |
 
-	rocks.register_layer=function(name,params,rock)
+- 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
 
-This function registers a layer. Layer is identified by unique string name. 
+### Clastic sediments
-Location of layer is specified in params and node, the layer should be 
-composed of is defined by rock.
 
-Field "params.gain" sets how height of the layer should vary. Field 
+Made from large or small particles. Either loose or bound into stones.
-"params.height" sets height of bottom of the layer. Field "params.limit" is 
-value of noise above which the layer is not generated. Set to 2 to disable 
-this feature. Last field "params.seed" is offset to world seed to seed the 
-noise.
 
-### Register vein
+(particle size: top-large botom-small)
 
-	rocks.register_vein=function(name,params)
+(hargness: loose -> solid)
 
-This function registers a vein with name "name" to be generated according 
+1. gravel -> conglomerate
-to params.
+2. sand -> sandstone
+3. mudstone
+4. clay -> claystone -> slate
 
-Field "params.spread" {x,y,z} defines how the vein should look like. X 
+### BioChemical sediments
-shoudd be equal to z. If y=x=z then the vein is equal in all directions. To 
-make the vein taller, set y to higher value. Larger values make larger and 
-less frequent veins.
 
-Field "params.treshold" specifies rarity of the vein. It should be betveen 
+Made from acient plants and creatures that died long ago and turned into rock.
--2 and +2, mapgen will use this or per-ore treshold if per-ore treshold is 
-larger.
 
-- 2 never generate
+Noise_vs: kind of sediment: (top) oil, Limestone, other, carbon-based
-- 1 extremly rare
-- 0 50% chance
-- less than 0 = SPAM
 
-Field "params.seed" is added to world seed to form seed for noise function.
+Noise_sp: low quality -> high quality
 
-Depths, where the wein should generate can be controlled by fields hmin and 
+1. oil: ?
-hmax. They can be set to nil to generate everywhere.
+2. Limestone
+3. other: fosfates, silicates, hornfels (unimp)
+4. carbon-based: Lignite -> Coal -> Anthracite
 
-Layers, where the vein should generate in must be listed in Field 
+### Chemical sediments
-"params.layer".
 
-## Register ore
+Created by chemical or physics/chemical reactions.
 
-	rocks.register_ore=function( vein, node, params )
+- Evaporites (unimp)
 
-This function registers ore or rock to be generated in vein "vein". Node to 
+### Vulanic and extraterrestrial sediments
-be generated is "node". Params specify parameters, where the rock should 
-spawn.
 
-If noise is larger than Params.treshold, the ore is spawned (set to 2 to 
+???
-spawn everywhere in the vein, 0.8=only in middle). Params.chance specify 
-the chance (/100%) of ore being spawned (0=never 1=always 0.5=50%).
 
-If multiple ores pass the treshhold and chance tests, ore with highest 
+The Igenous layer
-treshold and smallest chance is spawned.
+--------------
+
+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.

depositgen/init.lua

@@ -0,0 +1,50 @@
+depositgen={}
+local l={}
+depositgen.l=l
+
+l.print=function(text)
+ minetest.log("action","[depositgen] "..text)
+end
+
+l.print("mod initializing")
+
+local modpath=minetest.get_modpath(minetest.get_current_modname())
+
+l.OnGenerate={}
+l.OnInit={}
+l.ToResolve={}
+
+local includes={
+"utils","pipes","veins"
+}
+
+minetest.register_on_generated(function(minp,maxp,seed)
+ l.print("on generated")
+ local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+ local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+ local pr=PseudoRandom(seed)
+ local data=vm:get_data()
+ local mgc={minp=minp,maxp=maxp,pr=pr,data=data,area=area}
+ for i=1, #l.OnGenerate do
+  l.OnGenerate[i](mgc)
+ end
+ vm:set_data(data)
+ vm:write_to_map()
+end)
+
+minetest.register_on_mapgen_init(function(mapgen_params)
+ -- todo: disable caves and ores
+ -- todo: sort layers
+ --Resolve all mapgen nodes to content ids
+ l.print("Resolving node names")
+ for index,i in pairs(l.ToResolve) do
+  i.id=minetest.get_content_id(i.name)
+  i.name=nil --free some memory
+ end
+ l.print("running mapgen initialization tasks")
+ for _,i in pairs(l.OnInit) do
+  i(mapgen_params)
+ end
+end)
+
+for _,s in pairs(includes) do dofile(modpath.."/"..s..".lua") end

depositgen/pipes.lua

@@ -0,0 +1,115 @@
+-- experimental pipe generator
+local l=depositgen.l
+local print=l.print
+
+-- the public table of registered pipes
+depositgen.pipes={}
+local regs=depositgen.pipes
+
+depositgen.register_pipe= function(descr)
+ local pipe={
+  ymin=(descr.ymin or -10000),
+  ymax=(descr.ymax or 200),
+  scarcity=descr.scarcity,
+  width=descr.width-1,
+  content={ name=descr.content },
+  scatter={}
+ }
+ table.insert(depositgen.l.ToResolve,pipe.content)
+ for _,sc in pairs(descr.scatter) do
+  local psc={
+   scarcity=sc.scarcity,
+   size=(sc.size or pipe.width),
+   density=sc.density,
+   content={ name=sc.content }
+  }
+  table.insert(depositgen.l.ToResolve,psc.content)
+  table.insert(pipe.scatter,psc)
+ end
+ return table.insert(regs,pipe)
+end
+
+do
+local sample_pipe_def={
+ ymin=-200, ymax=-6,
+ scarcity=80,
+ width=4,
+ content="default:glass",
+ scatter={
+  { scarcity=7, density=4, content="default:mese", size=2 }
+ }
+}
+--depositgen.register_pipe(sample_pipe_def)
+end
+
+depositgen.l.ToResolve.air={name="air"}
+
+local function generate(mgc)
+ local t1 = os.clock()
+ 
+ local data = mgc.data
+ local area = mgc.area
+ local pr=mgc.pr
+ local minp,maxp=mgc.minp,mgc.maxp
+ 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}
+
+ for _,descr in pairs(regs) do
+  local numpipes_raw=(chunksize/descr.scarcity)
+  local numpipes = math.floor(numpipes_raw + (pr:next(0,99)/100))
+
+  for vc=1, numpipes do
+   local pointA=l.rndvector(mgc)
+   local pointB=l.rndvector(mgc)
+   local pointC=l.rndvector(mgc)
+   local step=(1.8)/(vector.distance(pointA,pointB)+vector.distance(pointB,pointC))
+
+   for t=0, 1, step do
+    local p=vector.multiply(pointA,(1-t)^2)
+    local di
+    p=vector.add(p, vector.multiply(pointB,2*t*(1-t)) )
+    p=vector.add(p, vector.multiply(pointC,t*t) )
+    p=vector.round(p)
+    local radiusp=math.floor(descr.width/2)
+    local radiusn=-descr.width+radiusp
+    --<scatter>
+    for _,ore in pairs(descr.scatter) do
+     if pr:next(0,ore.scarcity)==0 then
+      local ocx=pr:next(radiusn,radiusp)
+      local ocy=pr:next(radiusn,radiusp)
+      local ocz=pr:next(radiusn,radiusp)
+      for y=ocy-ore.size, ocy+ore.size do
+      for x=ocx-ore.size, ocx+ore.size do
+      for z=ocz-ore.size, ocz+ore.size do
+       if pr:next(0,ore.density)==0 then
+        di=area:index(p.x+x,p.y+y,p.z+z)
+        if data[di]==depositgen.l.ToResolve.air.id then
+         data[di]=ore.content.id
+        end
+       end
+      end end end
+     end
+    end
+    --</scatter>
+    --<brush>
+    for y= radiusn, radiusp do
+    for x= radiusn, radiusp do
+    for z= radiusn, radiusp do
+     di=area:index(p.x+x,p.y+y,p.z+z)
+     if data[di]==depositgen.l.ToResolve.air.id then
+      data[di]=descr.content.id
+     end
+    end end end
+    --</brush>
+    --brush(data,area,p,descr.radius,content,descr.scatter,orepr)
+   end
+  end
+
+ end --</apipe>
+
+ l.print("pipes "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end
+
+table.insert(depositgen.l.OnGenerate,generate)

depositgen/utils.lua

@@ -0,0 +1,16 @@
+function depositgen.l.SpawnCluster(mgc,pos,wherein,size,content,density)
+ for y=pos.y-size, pos.y+size do
+ for x=pos.x-size, pos.x+size do
+ for z=pos.z-size, pos.z+size do
+  if mgc.pr:next(0,density)==0 then
+   di=mgc.area:index(x,y,z)
+   if mgc.data[di]==wherein then
+     mgc.data[di]=content
+   end
+  end
+ end end end
+end
+function depositgen.l.rndvector(mgc)
+ local chunksizer = mgc.maxp.x - mgc.minp.x + 1
+ return vector.new(mgc.pr:next(0,chunksizer)+mgc.minp.x,mgc.pr:next(0,chunksizer)+mgc.minp.y,mgc.pr:next(0,chunksizer)+mgc.minp.z)
+end

depositgen/veins.lua

@@ -0,0 +1,101 @@
+-- experimental fast vein generator
+
+local l=depositgen.l
+local print=l.print
+
+-- the public table of registered veins
+depositgen.veins={}
+local regs=depositgen.veins
+
+depositgen.register_vein= function(descr)
+ local vein={
+  ymin=(descr.ymin or -10000),
+  ymax=(descr.ymax or 200),
+  scarcity=descr.scarcity,
+  content={ name=descr.content },
+  scatter={}
+ }
+ table.insert(depositgen.l.ToResolve,vein.content)
+ for _,sc in pairs(descr.scatter) do
+  local psc={
+   scarcity=sc.scarcity,
+   size=(sc.size or vein.width),
+   density=sc.density,
+   content={ name=sc.content }
+  }
+  table.insert(depositgen.l.ToResolve,psc.content)
+  table.insert(vein.scatter,psc)
+ end
+ return table.insert(regs,vein)
+end
+
+do
+local sample_vein_def={
+ ymin=-200, ymax=-6,
+ scarcity=80,
+ content="default:dirt",
+ scatter={
+  { scarcity=7, density=4, content="default:mese", size=2 }
+ }
+}
+depositgen.register_vein(sample_vein_def)
+end
+
+local function generate(mgc)
+ local t1 = os.clock()
+ local data = mgc.data
+ local area = mgc.area
+ local pr=mgc.pr
+
+ local chunksizer = mgc.maxp.x - mgc.minp.x + 1
+ local chunksize = chunksizer + 1
+ local pmapsize = {x = chunksize, y = chunksize, z = chunksize}
+ local minpxz = {x = mgc.minp.x, y = mgc.minp.z}
+ 
+ for _,descr in pairs(regs) do
+  local num = math.floor( (chunksize/descr.scarcity) + (pr:next(0,99)/100) )
+  for vc=1, num do
+
+  local A=l.rndvector(mgc)
+  local B=l.rndvector(mgc)
+  local C=l.rndvector(mgc)
+  local D=l.rndvector(mgc)
+  local l1=vector.distance(A,C)+vector.distance(C,B)
+  local l2=vector.distance(A,D)+vector.distance(D,B)
+  local step=2/math.max(l1,l2)
+  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) )
+    --<brush>
+    local di=area:indexp(vector.round(R))
+    if data[di] then
+     data[di]=descr.content.id
+    end
+    --</brush>
+   end
+  end
+  --<ores>
+  local cluster=descr.scatter[1]
+  for xxx=1, 5 do
+   local t=pr:next(0,100)/100
+   local u=pr:next(0,100)/100
+   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 R=vector.add(vector.multiply(P,(1-u)), vector.multiply(Q,u) )
+   l.SpawnCluster(mgc,vector.round(R),l.ToResolve.air.id,cluster.size,cluster.content.id,cluster.density)
+  end
+  --</ores>
+  end
+ end
+
+ print("vein "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end
+
+table.insert(depositgen.l.OnGenerate,generate)

geologicaLayers.lua

@@ -1,126 +0,0 @@
-local CcHard=3
-local CcStrong=3
-local CcMed=3
-local CcSoft=3
-
---
--- Main rocks (top to bottom)
---
-
--- Granite      In/Felsic  hard  Very common, below sed on land     
-minetest.register_node( "rocks:granite", {  
-	description = S("Granite"),
-	tiles = { "rocks_Granite.png" },
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-	groups = {cracky=CcStrong, stone=1}, 
-})
-rocks.register_layer( "granite",{ gain=20, height=-22, limit=2, seed=1 }, "rocks:granite")
-
--- Diorite      In/Inter   vhard Below granite                      
-minetest.register_node( "rocks:diorite", {  
-	description = S("Diorite"),
-	tiles = { "rocks_Diorite.png" },
-	groups = {cracky=CcHard, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "diorite",{ gain=20, height=-55, limit=2, seed=2 }, "rocks:diorite")
-
--- 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=CcStrong, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "basalt",{ gain=20, height=-60, limit=-0.7, seed=2 }, "rocks:basalt")
-
--- Gabbro       In/Mafic   vhard Below basalt/diorite (mtns, ocean) 
-minetest.register_node( "rocks:gabbro", {  
-	description = S("Gabbro"),
-	tiles = { "rocks_Gabbro.png" },
-	groups = {cracky=CcHard, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "gabbro",{ gain=20, height=-70, limit=2, seed=3 }, "rocks:gabbro")
-
--- Peridotite   In/UMafic  vhard Rarely under gabbro                
-minetest.register_node( "rocks:peridotite", {  
-	description = S("Peridotite"),
-	tiles = { "rocks_Peridotite.png" },
-	groups = {cracky=CcStrong, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "peridotite",{ gain=20, height=-120, limit=-0.8, seed=4 }, "rocks:peridotite")
-
--- Komatiite    Ex/UMafic  -     Too deep                           
-minetest.register_node( "rocks:komatiite", {  
-	description = S("Komatiite"),
-	tiles = { "default_stone.png" },  -- no texture, yet
-	groups = {cracky=CcHard, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "komatiite",{ gain=20, height=-130, limit=2, seed=5 }, "rocks:komatiite")
-
---
--- top sedimentary rocks
---
-
--- Mudstone     Sed        soft  Ocean, beach, river, glaciers
-minetest.register_node( "rocks:mudstone", {  
-	description = S("Mudstone"),
-	tiles = { "rocks_Mudstone.png" },
-	groups = {cracky=CcSoft, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "mudstone",{ gain=10, height=10, limit=2, seed=4 }, "rocks:mudstone")
-
--- Slate        MM/barro   med   Under mud/clay/siltstone
-minetest.register_node( "rocks:slate", {  
-	description = S("slate"),
-	tiles = { "rocks_Slate.png" },
-	groups = {cracky=CcMed, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
--- rocks.register_layer( "slate",{ gain=10, height=-7, limit=2, seed=5 }, "rocks:slate")
-
--- Schist       MM/barro   med   Under slate, sometimes igneous
-minetest.register_node( "rocks:schist", {  
-	description = S("schist"),
-	tiles = { "rocks_Schist.png" },
-	groups = {cracky=CcMed, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "schist",{ gain=10, height=-15, limit=2, seed=5 }, "rocks:schist")
-
--- Gneiss       MM/barro   hard  Under schist, sometimes igneous
-minetest.register_node( "rocks:gneiss", {  
-	description = S("gneiss"),
-	tiles = { "rocks_Gneiss.png" },
-	groups = {cracky=CcStrong, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "gneiss",{ gain=10, height=-19, limit=2, seed=6 }, "rocks:gneiss")
-
---
--- peak rocks
---
-
--- Rhyolite     Ex/Felsic  hard  Mountains, top                     
-minetest.register_node( "rocks:rhyolite", {  
-	description = S("Rhyolite"),
-	tiles = { "rocks_Rhyolite.png" },
-	groups = {cracky=CcHard, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "rhyolite",{ gain=8, height=80, limit=2, seed=4 }, "rocks:rhyolite")
-
--- Andesite     Ex/Inter   hard  Mountains, below rhyolite          
-minetest.register_node( "rocks:andesite", {  
-	description = S("Andesite"),
-	tiles = { "rocks_Andesite.png" },
-	groups = {cracky=CcHard, stone=1}, 
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-})
-rocks.register_layer( "andesite",{ gain=8, height=22, limit=2, seed=4 }, "rocks:andesite")
-
-print("[rocks/geologicaLayers] loaded.")

geologicaStrata.lua

@@ -1,75 +0,0 @@
-local CcHard=3
-local CcStrong=3
-local CcMed=3
-local CcSoft=3
-
---
--- Sedimentary
---
-
--- Claystone    Sed        soft  in mudstone
-rocks.register_vein("clay",{
-        spread = {x=30, y=10, z=30},
-        treshold=0.26, -- clay should be plenty
-        seed = 9,
-        layers={ "mudstone" },
-})
-rocks.register_ore( "clay", "default:clay", {treshold=0, chance=85 } )
-
--- Breccia      Mixture    soft  in mudstone
--- Conglomerate Sed        soft  in mudstone
-
--- Coal           Ocean, inland    2x swamp
-rocks.register_vein("coal",{
-        spread = {x=20, y=10, z=20},
-        treshold=0.48, -- coal shold be less
-        seed = 10,
-        layers={ "mudstone" },
-})
-rocks.register_ore( "coal", "default:stone_with_coal", {treshold=0, chance=85 } )
-
--- Pyrolusite     Swamp
--- Diatomite      Volcanic, desert
--- Glauconite     Ocean            20% sandstone
--- Apatite        Any              Metamorphic depth
--- Zeolite        Volcanic
--- Fuller's Earth Desert
--- Kaolinite      Tropics
-
---
--- Misc rocks
---
-
--- Limestone    Sed        med   in Rhyolite, Andesite in mountains
-minetest.register_node( "rocks:limestone", {  
-	description = S("Limestone"),
-	tiles = { "rocks_Limestone.png" },
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-	groups = {cracky=CcMed, stone=1}, 
-})
-rocks.register_vein("limestone",{
-        spread = {x=60, y=60, z=60},
-        treshold=0.4,
-        seed = 10,
-        layers={ "rhyolite", "andesite" },
-})
-rocks.register_ore( "limestone", "rocks:limestone", {treshold=0, chance=100} )
-
--- Dolomite     Sed        med   in Rhyolite, Andesite in mountains
-minetest.register_node( "rocks:dolomite", {  
-	description = S("Dolomite"),
-	tiles = { "rocks_Dolomite.png" },
-	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
-	groups = {cracky=CcMed, stone=1}, 
-})
-rocks.register_vein("dolomite",{
-        spread = {x=60, y=60, z=60},
-        treshold=0.4,
-        seed = 11,
-        layers={ "rhyolite", "andesite" },
-})
-rocks.register_ore( "dolomite", "rocks:dolomite", {treshold=0, chance=100} )
-
--- Quartzite    MM/contact vhard sandstone
-
-print("[rocks/geologicaStrata] loaded.")

geologicaVeins.lua

@@ -1,15 +0,0 @@
-local CcHard=3
-local CcStrong=3
-local CcMed=3
-local CcSoft=3
-
---
--- Veins
---
-
--- Skarn        MM/contact med   in rhyo/ande in mountains
--- Hornfels     MM/contact vhard in skarn
--- Marble       MM/contact hard  in skarn
--- Limestone    Sed        med   in skarn
-
-print("[rocks/geologicaVeins] loaded.")

how.txt

@@ -0,0 +1,22 @@
+I see that the state this mod is now is horrible. Now, as I passed my final 
+exams, i decided to spend more time on this. Since I cannot write a 
+complete geological simulator, I decided on the following strategy:
+
+1. Under like 5km generate only igneous rocks.
+2. Abowe that generate sandstone, that will serve as placeholder for more rocks.
+3. Generate a fixed amout of layers of rocks there.
+   - some igneous layers could represent lava spills
+   - including metamorphic rocks
+4. Shift everything around (possibly multiple times) to simulate faults.
+5. Create some intrusions (name?) and underground volcanic activity.
+6. Create some veins.
+
+Using 2d noise as heightmap has one notable advantage: Looping over 80*80 
+nodes is faster than 80*80*80.
+
+Minecraft mods I inspire from: Geologica, SGU bettergeo, geocraft.
+
+Doing a complete geological mapgen could be possible too: Start with plate 
+tectonics, deposit rock in layer on top of each other, do some faults and 
+folding inbetween, put soil on top. This could produce an interesting 
+landscape.

init.lua

@@ -1,42 +0,0 @@
--- 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 modpath=minetest.get_modpath(minetest.get_current_modname())
-
-dofile(modpath.."/register.lua")
-
-rocks.noiseparams_layers = {
-        offset = 0,
-        scale = 1,
-        spread = {x=80, y=80, z=80},
-        octaves = 2,
-        persist = 0.7
-}
-
-dofile(modpath.."/mapgen.lua")
---dofile(modpath.."/testing.lua")
-
-print("[rocks] core loaded.")
-
-dofile(modpath.."/geologicaLayers.lua")
-dofile(modpath.."/geologicaStrata.lua")
-dofile(modpath.."/geologicaVeins.lua")
-
-minetest.register_on_mapgen_init(function(mapgen_params)
- 
- for i,d in pairs(rocks.layers_name) do table.insert(rocks.layers,d) end
- table.sort(rocks.layers,function(a,b)
-  return a.height<b.height
- end)
- 
- -- todo: disable caves and ores
-
- print("[rocks] mapgen initalized ("..#rocks.layers.." layers)")
-
-end)

mapgen.lua

@@ -1,125 +0,0 @@
---
--- layer generator
---
-
-
-minetest.register_on_generated(function(minp, maxp, seed)
- stone_ctx= minetest.get_content_id("default:stone")
- air_ctx= minetest.get_content_id("air")
- 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}
-
- -- sort out unused layers
- -- generate noises
- avl={}
- for i,d in ipairs(rocks.layers) do
-  -- h je normaalna vyyska horného konca vrstvy
-  if (d.height+d.gain)>=minp.y then -- ak je to mimo zdola tak ju vyhodime
-   -- urobime sum pre vrstvu
-   local np=rocks.noiseparams_layers
-   np.seed=d.seed
-   np.scale=d.gain
-   np.offset=d.height
-   d.nmap=minetest.get_perlin_map(np,map_lengths_xyz):get2dMap_flat({x=minp.x, y=minp.z})
-   -- contene_id kamenov
-   d.rock.ctx=d.rock.ctx or minetest.get_content_id(d.rock.node)
-   -- veiny
-   local veinstodo={}
-   for veinname,vd in pairs(d.veins) do
-    -- todo: do not generate noise for blocks outside the layer
-    veinstodo[veinname]=vd
-   end
-   for veinname,vd in pairs(veinstodo) do
-    -- noise pre vein
-    np=vd.np
-    vd.nmap=minetest.get_perlin_map(np,map_lengths_xyz):get3dMap_flat(minp)
-    vd.prng=PseudoRandom(np.seed)
-    vd.sum=0
-    for i,ore in pairs(vd.ores) do
-     -- contntid pre rudu
-     ore.ctx=ore.ctx or minetest.get_content_id(ore.node)
-     -- sum sanci pre vein
-     vd.sum=vd.sum+ore.chance
-    end
-   end
-   table.insert(avl,d) -- pridame vrstvu
-   if (d.height-d.gain)>maxp.y then break end -- ak je mimo zhora tak uz dalsie nehladaj
-  else
-   --print(" no higher "..d.height.." than "..minp.y)
-  end
- end
-
- --
- print("[rocks] gen2 "..os.clock()-timebefore.." #layers="..#avl.." minp.y="..minp.y.." maxp.y="..maxp.y)
-    for lh,ld in ipairs(avl) do
-    print(" "..lh.."->"..ld.name.." top="..ld.height)
-     for vn,vd in pairs(ld.veins) do
-      print("  "..vn.."->"..#vd.ores)
-     end
-    end
-
- local noise2d_ix = 1
- local noise3d_ix = 1
-
- 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 p_pos = area:index(x, y, z)
-    local layer,vein
-    local rock
-    
-    --* select layer
-    for lh,ld in ipairs(avl) do
-     if (y<ld.nmap[noise2d_ix])and(ld.nmap[noise2d_ix]<ld.limit) then
-      layer=ld
-      rock=layer.rock
-      break
-     end
-    end
-    
-    if layer then
-     --* select vein
-     for veinname,vd in pairs(layer.veins) do
-      if vd.nmap[noise3d_ix]>vd.treshold then
-       vein=vd
-       --rock not changed
-       break
-      end
-     end
-    end
-    
-    if vein then
-     --* select ore
-     local chance=vein.prng:next(0,vein.sum)
-     for i,ore in pairs(vein.ores) do
-      chance=chance-ore.chance
-      if chance<=0 then
-       rock=ore
-       break
-      end
-     end
-    end
-    
-    --* place rocks
-    if (rock) and(nodes[p_pos]==stone_ctx) then
-     nodes[p_pos] = rock.ctx
-    end
-   
-    noise3d_ix =noise3d_ix+1
-    noise2d_ix = noise2d_ix+1
-   end
-   noise2d_ix = noise2d_ix-side_length
-  end
- end
- manipulator:set_data(nodes)
- --manipulator:calc_lighting()
- --manipulator:set_lighting({day=15,night=15})
- --manipulator:update_liquids()
- manipulator:write_to_map()
- print("[rocks] gen0 "..os.clock()-timebefore)
-end)
-

mineral/depends.txt

@@ -1 +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 :)

register.lua

@@ -1,61 +0,0 @@
--- global table and register_* functions
-
-rocks = {}
-
-rocks.layers = {}
-rocks.layers_name = {}
-rocks.veins = {}
-rocks.ores = {}
-
-rocks.register_layer=function(name,params,rock)
- assert(name)
- assert(params)
- assert(rock)
- assert(params.gain)
- assert(params.height)
- local maxheight
-
- local ld= {
-  gain=params.gain,
-  height=params.height,
-  maxheight=maxheight,
-  limit=(params.limit*params.gain)+params.height,
-  seed=params.seed or 0,
-  rock={ node=rock },
-  veins={},
-  name=name
- }
- rocks.layers_name[name]= ld
- print("[rocks] layer "..ld.name.." height="..ld.height.." limit="..ld.limit)
-end
-
-rocks.register_vein=function(name,params)
- assert(name)
- assert(params)
- assert(not rocks.veins[name])
- rocks.veins[name]={
-  np={
-   offset=0, scale=1, octaves=1, presist=0.8,
-   spread={x=params.spread.x, y=params.spread.y, z=params.spread.z}, 
-   -- swapped, becouse we generate by horizontal layers
-   seed=params.seed
-  },
-  treshold=params.treshold,
-  hmin=params.hmin, hmax=params.hmax,
-  layers=params.layers,
-  ores={}
- }
- for i,layername in pairs(params.layers) do
-  rocks.layers_name[layername].veins[name]=rocks.veins[name]
-  print("[rocks] vein "..name.." in "..layername)
- end
-end
-
-rocks.register_ore=function( vein, node, params )
- -- params= {treshold=0,    chance=1  }
- ore={ node=node }
- ore.treshold=(params.treshold or rocks.veins[vein].treshold)
- ore.chance= (params.chance or 1)
- table.insert(rocks.veins[vein].ores, ore)
- print("[rocks] ore "..node.." in "..vein.." chance="..ore.chance.." treshold="..ore.treshold)
-end

rocks/layers.lua

@@ -0,0 +1,61 @@
+local np_elv = {
+ offset = -4, octaves = 2, persist = 0.4,
+ scale = 28,
+ spread = {x=25, y=25, z=25},
+ seed = -546,
+}
+local np_fault = {
+ offset = -5, octaves = 2, persist = 0.4,
+ scale = 10,
+ spread = {x=25, y=25, z=25},
+ seed = 632,
+}
+
+rocksl.genlayers = 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_sample=minetest.get_content_id("rocks:samplelayerblock")
+ local c_air=minetest.get_content_id("air")
+
+ n_elv= minetest.get_perlin_map(np_elv, pmapsize) : get2dMap_flat(minpxz)
+ n_fault= minetest.get_perlin_map(np_fault, pmapsize) : get2dMap_flat(minpxz)
+ 
+ local nixz=1
+ for z=minp.z, maxp.z do for x=minp.x, maxp.x do
+
+  local fault=n_fault[nixz]
+  local lmh=-10
+  if fault>0 then lmh=lmh+10 end
+  local lt=math.floor(n_elv[nixz])
+  if lt>0 then
+   if lt>18 then lt=18 end
+   local top=math.min(lmh,maxp.y)
+   local bot=math.max(1+lmh-lt,minp.y)
+   for y=bot, top do
+    local di=area:index(x,y,z)
+    data[di]=c_sample
+   end
+  end
+
+  nixz=nixz+1
+  if z%100>50 then
+   for y=minp.y, maxp.y do data[area:index(x,y,z)]=c_air end
+  end
+
+ end end
+ vm:set_data(data)
+ vm:set_lighting({day=15,night=15})
+ minetest.log("action", "rocks/genlayers/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
+end
+
+minetest.register_node( "rocks:samplelayerblock", {
+	description = S("Sample"),
+	tiles = { "rocks_Slate.png" },
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+	groups = {cracky=3},
+})

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 +1,54 @@
+-- experimental fast vein generator
+
+rocks.veins={}
+
+table.insert(rocks.veins,{
+ scarcity=80,
+ 
+})
+
+
+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

testing.lua

@@ -1,12 +0,0 @@
-rocks.register_layer("testl", { gain=20, height=-55, limit=2, seed=1 }, "default:wood")
-
-rocks.register_vein("clay",{
-        spread = {x=30, y=10, z=30},
-        treshold=0.2, -- clay should be plenty
-        seed = 9,
-        hmin=-8, hmax=nil,
-        layers={ "mudstone" },
-})
-
-rocks.register_ore( "clay", "default:clay", {treshold=0, chance=85 } )
-rocks.register_ore( "clay", "default:torch", {treshold=0, chance=15 } )