Use minetest.register_ore() in minimal

games/minimal/mods/default/mapgen.lua

@@ -27,64 +27,74 @@ minetest.register_alias("mapgen_mese", "default:mese")
 -- Ore generation
 --
 
-local function generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume, ore_per_chunk, height_min, height_max, param2)
-	if maxp.y < height_min or minp.y > height_max then
-		return
-	end
-	local y_min = math.max(minp.y, height_min)
-	local y_max = math.min(maxp.y, height_max)
-	local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
-	local pr = PseudoRandom(seed)
-	local num_chunks = math.floor(chunks_per_volume * volume)
-	local chunk_size = 3
-	if ore_per_chunk <= 4 then
-		chunk_size = 2
-	end
-	local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
-	--print("generate_ore num_chunks: "..dump(num_chunks))
-	for i=1,num_chunks do
-		local y0 = pr:next(y_min, y_max-chunk_size+1)
-		if y0 >= height_min and y0 <= height_max then
-			local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
-			local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
-			local p0 = {x=x0, y=y0, z=z0}
-			for x1=0,chunk_size-1 do
-			for y1=0,chunk_size-1 do
-			for z1=0,chunk_size-1 do
-				if pr:next(1,inverse_chance) == 1 then
-					local x2 = x0+x1
-					local y2 = y0+y1
-					local z2 = z0+z1
-					local p2 = {x=x2, y=y2, z=z2}
-					if minetest.env:get_node(p2).name == wherein then
-						minetest.env:set_node(p2, {name=name, param2=param2})
-					end
-				end
-			end
-			end
-			end
-		end
-	end
-	--print("generate_ore done")
-end
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_coal",
+	wherein        = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = -31000,
+	height_max     = 64,
+})
 
-minetest.register_on_generated(function(minp, maxp, seed)
-	generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed,   1/8/8/8,    5, -31000, 64  )
-	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+1, 1/16/16/16, 5, -5,     7   )
-	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+2, 1/12/12/12, 5, -16,    -5  )
-	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+3, 1/9/9/9,    5, -31000, -17 )
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_iron",
+	wherein        = "default:stone",
+	clust_scarcity = 16*16*16,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = -5,
+	height_max     = 7,
+})
 
-	generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed+4, 1/8/8/8,    5, 200, 31000 ) -- for float islands and far scaled mountains
-	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+5, 1/9/9/9,    5, 200, 31000 )
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_iron",
+	wherein        = "default:stone",
+	clust_scarcity = 12*12*12,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = -16,
+	height_max     = -5,
+})
 
-	if minetest.setting_getbool("underground_springs") then
-		generate_ore("default:water_source", "default:stone", minp, maxp, seed+4, 1/24/24/24, 12, -100,   -11,   128)
-		generate_ore("default:water_source", "default:stone", minp, maxp, seed+5, 1/28/28/28, 8,  -10000, -101,  128)
-		generate_ore("default:lava_source",  "default:stone", minp, maxp, seed+6, 1/38/38/38, 6,  -500,   -101,  128)
-		generate_ore("default:lava_source",  "default:stone", minp, maxp, seed+7, 1/30/30/30, 16, -5000,  -501,  128)
-		generate_ore("default:lava_source",  "default:stone", minp, maxp, seed+8, 1/24/24/24, 20, -31000, -5001, 128)
-	end
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_iron",
+	wherein        = "default:stone",
+	clust_scarcity = 9*9*9,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = -31000,
+	height_max     = -17,
+})
 
+-- for float islands and far scaled
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_coal",
+	wherein        = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = 200,
+	height_max     = 31000,
+})
+
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "default:stone_with_iron",
+	wherein        = "default:stone",
+	clust_scarcity = 9*9*9,
+	clust_num_ores = 5,
+	clust_size     = 3,
+	height_min     = 200,
+	height_max     = 31000,
+})
+
+minetest.register_on_generated(function(minp, maxp, seed)
 	-- Generate clay
 	if maxp.y >= 2 and minp.y <= 0 then
 		-- Assume X and Z lengths are equal