Finish initial functional version

init.lua

@@ -10,7 +10,7 @@ local internal =
     { a = nil
 
     -- Average size of a cave biome
-    , biome_size  = { x =   50, y =   50, z =   50 }
+    , biome_size  = { x =  250, y =  250, z =  250 }
 
     -- Average blob size of connectivity noise params
     , cnct_blob   = { x =  250, y =  100, z =  250 }
@@ -91,7 +91,9 @@ noordstar_caves =
     --  - Make sure that the output changes VERY SLOWLY over time
     --  - Keep the function performant as it will be executed many, many times
     , cave_vastness = function(pos)
-        return pos.y / internal.world_depth
+        local y = math.abs(pos.y)
+        local d = math.abs(internal.world_depth / 2)
+        return 1 - (math.abs(y - d) / d)
     end
 
     -- A public list of all registered biomes
@@ -1123,6 +1125,26 @@ function internal.shape_def_distance(def, cnct, vrtcl)
     return dx^2 + dy^2
 end
 
+-- Prevent v7 from spawning large caves underground
+function internal.stop_v7_caverns()
+    local s = minetest.get_mapgen_setting("mgv7_spflags")
+
+    if s then
+        s = s:gsub(", nocaverns", "")
+        s = s:gsub(", caverns"  , "")
+        s = s:gsub("nocaverns, ", "")
+        s = s:gsub("caverns, "  , "")
+        s = s:gsub("nocaverns"  , "")
+        s = s:gsub("caverns"    , "")
+        
+        if s == "" then
+            minetest.set_mapgen_setting("mgv7_spflags", "nocaverns", true)
+        else
+            minetest.set_mapgen_setting("mgv7_spflags", s .. ", nocaverns", true)
+        end
+    end
+end
+
 -- Get verticality noise params
 function internal.verticality_noise_params()
     local factor = math.max(
@@ -1303,174 +1325,12 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
 
     timer.stop()
 end)
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+
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+-- Prevent v7 from spawning large caves underground
--------------------------------------------------------------------------------
+internal.stop_v7_caverns()
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--- For show, the following code COULD in theory be run elsewhere
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-
-noordstar_caves.register_shape({
-    name = "noordstar_caves:bubbles",
-    
-    noise_params = {
-        offset = 0.5,
-        scale = 0.5,
-        spread = { x = 20, y = 20, z = 20 },
-        seed = 248039,
-        octaves = 2,
-        persistence = 0.6,
-        lacunarity = 2.0,
-        flags = "eased"
-    },
-
-    func = function(pos, n)
-        return n
-    end,
-
-    -- TODO: Implement y limits
-    -- y_min = -31000,
-    -- y_max = 31000,
-
-    connectivity_point = 10,
-    verticality_point = 40,
-})
-noordstar_caves.register_shape({
-    name = "noordstar_caves:cliffs",
-    
-    noise_params = {
-        offset = 0.4,
-        scale = 0.5,
-        spread = { x = 20, y = 100, z = 20 },
-        seed = 97354,
-        octaves = 4,
-        persistence = 0.6,
-        lacunarity = 2.0,
-        flags = ""
-    },
-
-    func = function(pos, n)
-        return n
-    end,
-
-    connectivity_point = 30,
-    verticality_point = 80,
-})
-noordstar_caves.register_shape({
-    name = "noordstar_caves:donuts",
-    
-    noise_params = {
-        offset = 0.0,
-        scale = 1.0,
-        spread = { x = 30, y = 30, z = 30 },
-        seed = 3934,
-        octaves = 1,
-        persistence = 0.6,
-        lacunarity = 2.0,
-        flags = "eased"
-    },
-
-    func = function(pos, n)
-        return 1 - 2 * math.abs(n)^0.5
-    end,
-
-    connectivity_point = 50,
-    verticality_point = 40,
-})
-noordstar_caves.register_shape({
-    name = "noordstar_caves:wall",
-
-    func = function(pos, n)
-        return -0.5
-    end,
-
-    connectivity_point = 0,
-    verticality_point = 0,
-})
-
--- noordstar_caves.set_world_depth(-60)
--- noordstar_caves.cave_vastness = function(pos) return math.abs(pos.y - 60) / 120 end
-
-noordstar_caves.register_biome({
-    name = "nc:glowing_floor",
-    node_floor = "mcl_core:crying_obsidian",
-    node_wall = "mcl_core:sand",
-    node_roof = "mcl_ocean:sea_lantern",
-    node_dust = "mcl_core:snow",
-    heat_point = 20,
-    humidity_point = 0,
-})
-noordstar_caves.register_biome({
-    name = "nc:crazy_glowin_walls",
-    node_floor = "mcl_amethyst:amethyst_block",
-    node_wall = "mcl_crimson:shroomlight",
-    node_roof = "mcl_colorblocks:glazed_terracotta_silver",
-    heat_point = 100,
-    humidity_point = 0,
-})
-noordstar_caves.register_biome({
-    name = "nc:regular",
-    heat_point = 50,
-    humidity_point = 50,
-})
-noordstar_caves.register_biome({
-    name = "nc:cold",
-    node_dust = "mcl_core:snow",
-    node_roof = "mcl_core:ice",
-    heat_point = 10,
-    humidity_point = 100,
-})
-noordstar_caves.register_biome({
-    name = "nc:grass",
-    node_floor = "mcl_core:dirt_with_grass",
-    heat_point = 50,
-    humidity_point = 70,
-})
-noordstar_caves.register_biome({
-    name = "nc:dangerous_lava",
-    node_floor = "mcl_core:lava_source",
-    y_max = -40,
-    heat_point = 100,
-    humidity_point = 100,
-})
-
-noordstar_caves.register_decoration({
-    deco_type = "simple",
-    place_on = "floor",
-    fill_ratio = 0.01,
-    decoration = "mcl_core:cactus",
-    height = 3,
-    height_max = 8,
-    biomes = { "nc:glowing_floor" },
-})
-noordstar_caves.register_decoration({
-    deco_type = "simple",
-    place_on = "ceiling",
-    fill_ratio = 0.1,
-    decoration = "mcl_ocean:sea_lantern",
-    height = 1,
-    height_max = 4,
-    biomes = { "nc:crazy_glowin_walls" },
-    place_offset_y = -3,
-})
-noordstar_caves.register_decoration({
-    deco_type = "schematic",
-    place_on = "floor",
-    fill_ratio = 0.001,
-    schematic = squeak,
-    rotation = "random",
-    -- place_offset_y = 5,
-})
-
-noordstar_caves.set_world_depth(-993)