Faster mapgen: use voxelmanip for ungen check, scanning chunk below

README.txt

@@ -1,4 +1,4 @@
-fracture 0.1.6 by paramat
+fracture 0.1.7 by paramat
 For latest stable Minetest back to 0.4.8
 Depends default
 Licenses: code WTFPL

functions.lua

@@ -130,12 +130,12 @@ if SINGLENODE then
 		minetest.set_mapgen_params({mgname="singlenode", water_level=-32000})
 	end)
 
-	-- Spawn player
+	-- Spawn player. Dependant on chunk size = 5 mapblocks
 
 	function spawnplayer(player)
 		local DENOFF = -0.4
 		local TSTONE = 0.02
-		local SCAT = 8 -- Player scatter from world centre in chunks (80 nodes).
+		local PSCA = 8 -- Player scatter from world centre in chunks (80 nodes).
 		local xsp
 		local ysp
 		local zsp
@@ -157,9 +157,9 @@ if SINGLENODE then
 		}
 		for chunk = 1, 64 do
 			print ("[fracture] searching for spawn "..chunk)
-			local x0 = 80 * math.random(-SCAT, SCAT) - 32
+			local x0 = 80 * math.random(-PSCA, PSCA) - 32
-			local z0 = 80 * math.random(-SCAT, SCAT) - 32
+			local z0 = 80 * math.random(-PSCA, PSCA) - 32
-			local y0 = 80 * math.random(-SCAT, SCAT) - 32
+			local y0 = 80 * math.random(-PSCA, PSCA) - 32
 			local x1 = x0 + 79
 			local z1 = z0 + 79
 			local y1 = y0 + 79

init.lua

@@ -1,8 +1,10 @@
--- fracture 0.1.6 by paramat
+-- fracture 0.1.7 by paramat
 -- For latest stable Minetest and back to 0.4.8
 -- Depends default
 -- License: code WTFPL
 
+-- use LVM for 'ungen' check, scanning chunk below
+
 -- Parameters
 
 local YMIN = -33000 -- Set to -33000 when using singlenode option
@@ -122,7 +124,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local c_grass5 = minetest.get_content_id("default:grass_5")
 	local c_dryshrub = minetest.get_content_id("default:dry_shrub")
 	
-	local sidelen = x1 - x0 + 1
+	local sidelen = x1 - x0 + 1 -- mapchunk side length
+	local facearea = sidelen ^ 2 -- mapchunk face area
 	local chulens = {x=sidelen, y=sidelen+2, z=sidelen}
 	local minposxyz = {x=x0, y=y0-1, z=z0}
 	
@@ -132,10 +135,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local nvals_biome = minetest.get_perlin_map(np_biome, chulens):get3dMap_flat(minposxyz)
 	local nvals_cloud = minetest.get_perlin_map(np_cloud, chulens):get3dMap_flat(minposxyz)
 	
-	local ungen = false
+	local viu = area:index(x0, y0-1, z0) -- ungenerated chunk below?
-	if minetest.get_node({x=x0, y=y0-1, z=z0}).name == "ignore" then
+	local ungen = data[viu] == c_ignore
-		ungen = true
-	end
 	
 	local nixyz = 1
 	local stable = {}
@@ -178,20 +179,20 @@ minetest.register_on_generated(function(minp, maxp, seed)
 						stable[si] = 0
 					end
 				else
-					local nodename = minetest.get_node({x=x,y=y,z=z}).name
+					local nodid = data[vi]
-					if nodename == "fracture:stone"
+					if nodid == c_stone
-					or nodename == "fracture:desertstone"
+					or nodid == c_destone
-					or nodename == "fracture:dirt"
+					or nodid == c_dirt
-					or nodename == "fracture:grass"
+					or nodid == c_grass
-					or nodename == "fracture:dirtsnow"
+					or nodid == c_dirtsnow
-					or nodename == "default:snowblock"
+					or nodid == c_snowblock
-					or nodename == "default:desert_sand"
+					or nodid == c_desand
-					or nodename == "default:stone_with_diamond"
+					or nodid == c_stodiam
-					or nodename == "default:stone_with_mese"
+					or nodid == c_stomese
-					or nodename == "default:stone_with_gold"
+					or nodid == c_stogold
-					or nodename == "default:stone_with_copper"
+					or nodid == c_stocopp
-					or nodename == "default:stone_with_iron"
+					or nodid == c_stoiron
-					or nodename == "default:stone_with_coal" then
+					or nodid == c_stocoal then
 						stable[si] = 2
 					else
 						stable[si] = 0
@@ -270,8 +271,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					local xrq = 16 * math.floor((x - x0) / 16)
 					local zrq = 16 * math.floor((z - z0) / 16)
 					local yrq = 40
-					--local yrq = 79
+					local qixyz = zrq * facearea + yrq * sidelen + xrq + 1
-					local qixyz = zrq * 6400 + yrq * 80 + xrq + 1
 					if math.abs(nvals_cloud[qixyz]) < 0.05 then
 						data[vi] = c_cloud
 					end

nodes.lua

@@ -1,6 +1,7 @@
 minetest.register_node("fracture:stone", {
 	description = "FR Stone",
 	tiles = {"default_stone.png"},
+	is_ground_content = false,
 	groups = {cracky=3},
 	drop = "default:cobble",
 	sounds = default.node_sound_stone_defaults(),
@@ -9,6 +10,7 @@ minetest.register_node("fracture:stone", {
 minetest.register_node("fracture:desertstone", {
 	description = "FR Desert Stone",
 	tiles = {"default_desert_stone.png"},
+	is_ground_content = false,
 	groups = {cracky=3},
 	drop = "default:desert_stone",
 	sounds = default.node_sound_stone_defaults(),
@@ -31,7 +33,7 @@ minetest.register_node("fracture:dirt", {
 minetest.register_node("fracture:dirtsnow", {
 	description = "Dirt with Snow",
 	tiles = {"default_snow.png", "default_dirt.png", "default_snow.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {crumbly=3,soil=1},
 	drop = "default:dirt",
 	sounds = default.node_sound_dirt_defaults({
@@ -87,6 +89,7 @@ minetest.register_node("fracture:appling", {
 	wield_image = "default_sapling.png",
 	paramtype = "light",
 	walkable = false,
+	is_ground_content = false,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@@ -114,6 +117,7 @@ minetest.register_node("fracture:pineling", {
 	wield_image = "fracture_pineling.png",
 	paramtype = "light",
 	walkable = false,
+	is_ground_content = false,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}