Default: Optimise and simplify leafdecay ABM, remove cache
[oweals/minetest_game.git] / mods / default / mapgen.lua
index 4865341839625ef22893ebe1b9d438f2c32f0ac2..52aa294c7e5dd5bd0cfe2861eb7fd779f70f1b4c 100644 (file)
@@ -2,7 +2,6 @@
 -- Aliases for map generator outputs
 --
 
-
 minetest.register_alias("mapgen_stone", "default:stone")
 minetest.register_alias("mapgen_dirt", "default:dirt")
 minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")
@@ -19,15 +18,19 @@ minetest.register_alias("mapgen_snow", "default:snow")
 minetest.register_alias("mapgen_ice", "default:ice")
 minetest.register_alias("mapgen_sandstone", "default:sandstone")
 
+-- Flora
+
 minetest.register_alias("mapgen_tree", "default:tree")
 minetest.register_alias("mapgen_leaves", "default:leaves")
 minetest.register_alias("mapgen_apple", "default:apple")
 minetest.register_alias("mapgen_jungletree", "default:jungletree")
 minetest.register_alias("mapgen_jungleleaves", "default:jungleleaves")
 minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
-minetest.register_alias("mapgen_pinetree", "default:pinetree")
+minetest.register_alias("mapgen_pine_tree", "default:pine_tree")
 minetest.register_alias("mapgen_pine_needles", "default:pine_needles")
 
+-- Dungeons
+
 minetest.register_alias("mapgen_cobble", "default:cobble")
 minetest.register_alias("mapgen_stair_cobble", "stairs:stair_cobble")
 minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
@@ -39,86 +42,111 @@ minetest.register_alias("mapgen_stair_sandstonebrick", "stairs:stair_sandstonebr
 -- Register ores
 --
 
+function default.register_ores()
+       -- Blob ores
+       -- These first to avoid other ores in blobs
 
--- Blob ore first to avoid other ores inside blobs
+       -- Clay
+       -- This first to avoid clay in sand blobs
 
-function default.register_ores()
-       minetest.register_ore({ 
-               ore_type         = "blob",
-               ore              = "default:clay",
-               wherein          = {"default:sand"},
-               clust_scarcity   = 24 * 24 * 24,
-               clust_size       = 7,
-               y_min            = -15,
-               y_max            = 0,
-               noise_threshhold = 0,
-               noise_params     = {
-                       offset = 0.35,
+       minetest.register_ore({
+               ore_type        = "blob",
+               ore             = "default:clay",
+               wherein         = {"default:sand"},
+               clust_scarcity  = 16 * 16 * 16,
+               clust_size      = 5,
+               y_min           = -15,
+               y_max           = 0,
+               noise_threshold = 0.0,
+               noise_params    = {
+                       offset = 0.5,
                        scale = 0.2,
                        spread = {x = 5, y = 5, z = 5},
                        seed = -316,
                        octaves = 1,
-                       persist = 0.5
+                       persist = 0.0
                },
        })
 
-       minetest.register_ore({ 
-               ore_type         = "blob",
-               ore              = "default:sand",
-               wherein          = {"default:stone"},
-               clust_scarcity   = 24 * 24 * 24,
-               clust_size       = 7,
-               y_min            = -63,
-               y_max            = 4,
-               noise_threshhold = 0,
-               noise_params     = {
-                       offset = 0.35,
+       -- Sand
+
+       minetest.register_ore({
+               ore_type        = "blob",
+               ore             = "default:sand",
+               wherein         = {"default:stone", "default:sandstone",
+                       "default:desert_stone"},
+               clust_scarcity  = 16 * 16 * 16,
+               clust_size      = 5,
+               y_min           = -31,
+               y_max           = 0,
+               noise_threshold = 0.0,
+               noise_params    = {
+                       offset = 0.5,
                        scale = 0.2,
                        spread = {x = 5, y = 5, z = 5},
                        seed = 2316,
                        octaves = 1,
-                       persist = 0.5
+                       persist = 0.0
                },
        })
 
+       -- Dirt
+
        minetest.register_ore({
-               ore_type         = "blob",
-               ore              = "default:dirt",
-               wherein          = {"default:stone"},
-               clust_scarcity   = 24 * 24 * 24,
-               clust_size       = 7,
-               y_min            = -63,
-               y_max            = 31000,
-               noise_threshhold = 0,
-               noise_params     = {
-                       offset = 0.35,
+               ore_type        = "blob",
+               ore             = "default:dirt",
+               wherein         = {"default:stone"},
+               clust_scarcity  = 16 * 16 * 16,
+               clust_size      = 5,
+               y_min           = -31,
+               y_max           = 31000,
+               noise_threshold = 0.0,
+               noise_params    = {
+                       offset = 0.5,
                        scale = 0.2,
                        spread = {x = 5, y = 5, z = 5},
                        seed = 17676,
                        octaves = 1,
-                       persist = 0.5
+                       persist = 0.0
                },
        })
 
+       -- Gravel
+
        minetest.register_ore({
-               ore_type         = "blob",
-               ore              = "default:gravel",
-               wherein          = {"default:stone"},
-               clust_scarcity   = 24 * 24 * 24,
-               clust_size       = 7,
-               y_min            = -31000,
-               y_max            = 31000,
-               noise_threshhold = 0,
-               noise_params     = {
-                       offset = 0.35,
+               ore_type        = "blob",
+               ore             = "default:gravel",
+               wherein         = {"default:stone"},
+               clust_scarcity  = 16 * 16 * 16,
+               clust_size      = 5,
+               y_min           = -31000,
+               y_max           = 31000,
+               noise_threshold = 0.0,
+               noise_params    = {
+                       offset = 0.5,
                        scale = 0.2,
                        spread = {x = 5, y = 5, z = 5},
                        seed = 766,
                        octaves = 1,
-                       persist = 0.5
+                       persist = 0.0
                },
        })
 
+       -- Scatter ores
+
+       -- Coal
+
+       minetest.register_ore({
+               ore_type       = "scatter",
+               ore            = "default:stone_with_coal",
+               wherein        = "default:stone",
+               clust_scarcity = 8 * 8 * 8,
+               clust_num_ores = 9,
+               clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
+       })
+
        minetest.register_ore({
                ore_type       = "scatter",
                ore            = "default:stone_with_coal",
@@ -141,55 +169,94 @@ function default.register_ores()
                y_max          = 0,
        })
 
+       -- Iron
+
        minetest.register_ore({
                ore_type       = "scatter",
                ore            = "default:stone_with_iron",
                wherein        = "default:stone",
-               clust_scarcity = 12 * 12 * 12,
-               clust_num_ores = 3,
-               clust_size     = 2,
-               y_min          = -15,
-               y_max          = 2,
+               clust_scarcity = 9 * 9 * 9,
+               clust_num_ores = 12,
+               clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
+       })
+
+       minetest.register_ore({
+               ore_type       = "scatter",
+               ore            = "default:stone_with_iron",
+               wherein        = "default:stone",
+               clust_scarcity = 7 * 7 * 7,
+               clust_num_ores = 5,
+               clust_size     = 3,
+               y_min          = -31000,
+               y_max          = 0,
        })
 
        minetest.register_ore({
                ore_type       = "scatter",
                ore            = "default:stone_with_iron",
                wherein        = "default:stone",
+               clust_scarcity = 24 * 24 * 24,
+               clust_num_ores = 27,
+               clust_size     = 6,
+               y_min          = -31000,
+               y_max          = -64,
+       })
+
+       -- Copper
+
+       minetest.register_ore({
+               ore_type       = "scatter",
+               ore            = "default:stone_with_copper",
+               wherein        = "default:stone",
                clust_scarcity = 9 * 9 * 9,
                clust_num_ores = 5,
                clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
+       })
+
+       minetest.register_ore({
+               ore_type       = "scatter",
+               ore            = "default:stone_with_copper",
+               wherein        = "default:stone",
+               clust_scarcity = 12 * 12 * 12,
+               clust_num_ores = 4,
+               clust_size     = 3,
                y_min          = -63,
                y_max          = -16,
        })
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_iron",
+               ore            = "default:stone_with_copper",
                wherein        = "default:stone",
-               clust_scarcity = 7 * 7 * 7,
+               clust_scarcity = 9 * 9 * 9,
                clust_num_ores = 5,
                clust_size     = 3,
                y_min          = -31000,
                y_max          = -64,
        })
 
+       -- Gold
+
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_iron",
+               ore            = "default:stone_with_gold",
                wherein        = "default:stone",
-               clust_scarcity = 24 * 24 * 24,
-               clust_num_ores = 27,
-               clust_size     = 6,
-               y_min          = -31000,
-               y_max          = -64,
+               clust_scarcity = 13 * 13 * 13,
+               clust_num_ores = 5,
+               clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
        })
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_mese",
+               ore            = "default:stone_with_gold",
                wherein        = "default:stone",
-               clust_scarcity = 18 * 18 * 18,
+               clust_scarcity = 15 * 15 * 15,
                clust_num_ores = 3,
                clust_size     = 2,
                y_min          = -255,
@@ -198,31 +265,33 @@ function default.register_ores()
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_mese",
+               ore            = "default:stone_with_gold",
                wherein        = "default:stone",
-               clust_scarcity = 14 * 14 * 14,
+               clust_scarcity = 13 * 13 * 13,
                clust_num_ores = 5,
                clust_size     = 3,
                y_min          = -31000,
                y_max          = -256,
        })
 
+       -- Mese crystal
+
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:mese",
+               ore            = "default:stone_with_mese",
                wherein        = "default:stone",
-               clust_scarcity = 36 * 36 * 36,
-               clust_num_ores = 3,
-               clust_size     = 2,
-               y_min          = -31000,
-               y_max          = -1024,
+               clust_scarcity = 14 * 14 * 14,
+               clust_num_ores = 5,
+               clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
        })
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_gold",
+               ore            = "default:stone_with_mese",
                wherein        = "default:stone",
-               clust_scarcity = 15 * 15 * 15,
+               clust_scarcity = 18 * 18 * 18,
                clust_num_ores = 3,
                clust_size     = 2,
                y_min          = -255,
@@ -231,15 +300,28 @@ function default.register_ores()
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_gold",
+               ore            = "default:stone_with_mese",
                wherein        = "default:stone",
-               clust_scarcity = 13 * 13 * 13,
+               clust_scarcity = 14 * 14 * 14,
                clust_num_ores = 5,
                clust_size     = 3,
                y_min          = -31000,
                y_max          = -256,
        })
 
+       -- Diamond
+
+       minetest.register_ore({
+               ore_type       = "scatter",
+               ore            = "default:stone_with_diamond",
+               wherein        = "default:stone",
+               clust_scarcity = 15 * 15 * 15,
+               clust_num_ores = 4,
+               clust_size     = 3,
+               y_min          = 1025,
+               y_max          = 31000,
+       })
+
        minetest.register_ore({
                ore_type       = "scatter",
                ore            = "default:stone_with_diamond",
@@ -262,26 +344,28 @@ function default.register_ores()
                y_max          = -256,
        })
 
+       -- Mese block
+
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_copper",
+               ore            = "default:mese",
                wherein        = "default:stone",
-               clust_scarcity = 12 * 12 * 12,
-               clust_num_ores = 4,
-               clust_size     = 3,
-               y_min          = -63,
-               y_max          = -16,
+               clust_scarcity = 36 * 36 * 36,
+               clust_num_ores = 3,
+               clust_size     = 2,
+               y_min          = 1025,
+               y_max          = 31000,
        })
 
        minetest.register_ore({
                ore_type       = "scatter",
-               ore            = "default:stone_with_copper",
+               ore            = "default:mese",
                wherein        = "default:stone",
-               clust_scarcity = 9 * 9 * 9,
-               clust_num_ores = 5,
-               clust_size     = 3,
+               clust_scarcity = 36 * 36 * 36,
+               clust_num_ores = 3,
+               clust_size     = 2,
                y_min          = -31000,
-               y_max          = -64,
+               y_max          = -1024,
        })
 end
 
@@ -290,14 +374,57 @@ end
 -- Register biomes
 --
 
+-- All mapgens except mgv6 and singlenode
 
 function default.register_biomes()
        minetest.clear_registered_biomes()
 
+       -- Permanent ice
+
+       minetest.register_biome({
+               name = "glacier",
+               node_dust = "default:snowblock",
+               node_top = "default:snowblock",
+               depth_top = 1,
+               node_filler = "default:snowblock",
+               depth_filler = 3,
+               node_stone = "default:ice",
+               node_water_top = "default:ice",
+               depth_water_top = 10,
+               --node_water = "",
+               node_river_water = "default:ice",
+               node_riverbed = "default:gravel",
+               depth_riverbed = 2,
+               y_min = -8,
+               y_max = 31000,
+               heat_point = 0,
+               humidity_point = 50,
+       })
+
+       minetest.register_biome({
+               name = "glacier_ocean",
+               node_dust = "default:snowblock",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               y_min = -112,
+               y_max = -9,
+               heat_point = 0,
+               humidity_point = 50,
+       })
+
+       -- Cold
+
        minetest.register_biome({
-               name = "default:grassland",
+               name = "tundra",
                --node_dust = "",
-               node_top = "default:dirt_with_grass",
+               node_top = "default:dirt_with_snow",
                depth_top = 1,
                node_filler = "default:dirt",
                depth_filler = 1,
@@ -305,83 +432,581 @@ function default.register_biomes()
                --node_water_top = "",
                --depth_water_top = ,
                --node_water = "",
-               y_min = 5,
+               --node_river_water = "",
+               node_riverbed = "default:gravel",
+               depth_riverbed = 2,
+               y_min = 2,
                y_max = 31000,
-               heat_point = 50,
-               humidity_point = 50,
+               heat_point = 15,
+               humidity_point = 35,
        })
 
        minetest.register_biome({
-               name = "default:grassland_ocean",
+               name = "tundra_beach",
                --node_dust = "",
-               node_top = "default:sand",
+               node_top = "default:gravel",
                depth_top = 1,
-               node_filler = "default:sand",
+               node_filler = "default:gravel",
                depth_filler = 2,
                --node_stone = "",
                --node_water_top = "",
                --depth_water_top = ,
                --node_water = "",
-               y_min = -31000,
-               y_max = 4,
-               heat_point = 50,
-               humidity_point = 50,
+               --node_river_water = "",
+               node_riverbed = "default:gravel",
+               depth_riverbed = 2,
+               y_min = -3,
+               y_max = 1,
+               heat_point = 15,
+               humidity_point = 35,
        })
-end
-
-
---
--- Register mgv6 decorations
---
 
+       minetest.register_biome({
+               name = "tundra_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:gravel",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = -4,
+               heat_point = 15,
+               humidity_point = 35,
+       })
 
-function default.register_mgv6_decorations()
 
-       -- Papyrus
+       minetest.register_biome({
+               name = "taiga",
+               node_dust = "default:snow",
+               node_top = "default:dirt_with_snow",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 2,
+               y_max = 31000,
+               heat_point = 15,
+               humidity_point = 65,
+       })
 
-       minetest.register_decoration({
-               deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
-               sidelen = 8,
-               noise_params = {
-                       offset = -0.3,
-                       scale = 0.7,
-                       spread = {x = 100, y = 100, z = 100},
-                       seed = 354,
-                       octaves = 3,
-                       persist = 0.7
-               },
-               y_min = 1,
+       minetest.register_biome({
+               name = "taiga_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
                y_max = 1,
-               decoration = "default:papyrus",
-               height = 2,
-               height_max = 4,
-               spawn_by = "default:water_source",
-               num_spawn_by = 1,
+               heat_point = 15,
+               humidity_point = 65,
        })
 
-       -- Cacti
+       -- Temperate
 
-       minetest.register_decoration({
-               deco_type = "simple",
-               place_on = {"default:desert_sand"},
-               sidelen = 16,
-               noise_params = {
-                       offset = -0.012,
-                       scale = 0.024,
-                       spread = {x = 100, y = 100, z = 100},
-                       seed = 230,
-                       octaves = 3,
-                       persist = 0.6
-               },
-               y_min = 1,
-               y_max = 30,
-               decoration = "default:cactus",
-               height = 3,
-               height_max = 4,
+       minetest.register_biome({
+               name = "stone_grassland",
+               --node_dust = "",
+               node_top = "default:dirt_with_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 1,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 6,
+               y_max = 31000,
+               heat_point = 40,
+               humidity_point = 35,
        })
 
-       -- Grasses
+       minetest.register_biome({
+               name = "stone_grassland_dunes",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 2,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 5,
+               y_max = 5,
+               heat_point = 40,
+               humidity_point = 35,
+       })
+
+       minetest.register_biome({
+               name = "stone_grassland_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = 4,
+               heat_point = 40,
+               humidity_point = 35,
+       })
+
+
+       minetest.register_biome({
+               name = "coniferous_forest",
+               --node_dust = "",
+               node_top = "default:dirt_with_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 6,
+               y_max = 31000,
+               heat_point = 40,
+               humidity_point = 65,
+       })
+
+       minetest.register_biome({
+               name = "coniferous_forest_dunes",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 5,
+               y_max = 5,
+               heat_point = 40,
+               humidity_point = 65,
+       })
+
+       minetest.register_biome({
+               name = "coniferous_forest_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = 4,
+               heat_point = 40,
+               humidity_point = 65,
+       })
+
+
+       minetest.register_biome({
+               name = "sandstone_grassland",
+               --node_dust = "",
+               node_top = "default:dirt_with_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 1,
+               node_stone = "default:sandstone",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 6,
+               y_max = 31000,
+               heat_point = 60,
+               humidity_point = 35,
+       })
+
+       minetest.register_biome({
+               name = "sandstone_grassland_dunes",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 2,
+               node_stone = "default:sandstone",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 5,
+               y_max = 5,
+               heat_point = 60,
+               humidity_point = 35,
+       })
+
+       minetest.register_biome({
+               name = "sandstone_grassland_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               node_stone = "default:sandstone",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = 4,
+               heat_point = 60,
+               humidity_point = 35,
+       })
+
+
+       minetest.register_biome({
+               name = "deciduous_forest",
+               --node_dust = "",
+               node_top = "default:dirt_with_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 1,
+               y_max = 31000,
+               heat_point = 60,
+               humidity_point = 65,
+       })
+
+       minetest.register_biome({
+               name = "deciduous_forest_swamp",
+               --node_dust = "",
+               node_top = "default:dirt",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -3,
+               y_max = 0,
+               heat_point = 60,
+               humidity_point = 65,
+       })
+
+       minetest.register_biome({
+               name = "deciduous_forest_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = -4,
+               heat_point = 60,
+               humidity_point = 65,
+       })
+
+       -- Hot
+
+       minetest.register_biome({
+               name = "desert",
+               --node_dust = "",
+               node_top = "default:desert_sand",
+               depth_top = 1,
+               node_filler = "default:desert_sand",
+               depth_filler = 1,
+               node_stone = "default:desert_stone",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 5,
+               y_max = 31000,
+               heat_point = 85,
+               humidity_point = 20,
+       })
+
+       minetest.register_biome({
+               name = "desert_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               node_stone = "default:desert_stone",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = 4,
+               heat_point = 85,
+               humidity_point = 20,
+       })
+
+
+       minetest.register_biome({
+               name = "savanna",
+               --node_dust = "",
+               node_top = "default:dirt_with_dry_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 1,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 1,
+               y_max = 31000,
+               heat_point = 85,
+               humidity_point = 50,
+       })
+
+       minetest.register_biome({
+               name = "savanna_swamp",
+               --node_dust = "",
+               node_top = "default:dirt",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -3,
+               y_max = 0,
+               heat_point = 85,
+               humidity_point = 50,
+       })
+
+       minetest.register_biome({
+               name = "savanna_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = -4,
+               heat_point = 85,
+               humidity_point = 50,
+       })
+
+
+       minetest.register_biome({
+               name = "rainforest",
+               --node_dust = "",
+               node_top = "default:dirt_with_grass",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = 1,
+               y_max = 31000,
+               heat_point = 85,
+               humidity_point = 80,
+       })
+
+       minetest.register_biome({
+               name = "rainforest_swamp",
+               --node_dust = "",
+               node_top = "default:dirt",
+               depth_top = 1,
+               node_filler = "default:dirt",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -3,
+               y_max = 0,
+               heat_point = 85,
+               humidity_point = 80,
+       })
+
+       minetest.register_biome({
+               name = "rainforest_ocean",
+               --node_dust = "",
+               node_top = "default:sand",
+               depth_top = 1,
+               node_filler = "default:sand",
+               depth_filler = 3,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               node_riverbed = "default:sand",
+               depth_riverbed = 2,
+               y_min = -112,
+               y_max = -4,
+               heat_point = 85,
+               humidity_point = 80,
+       })
+
+       -- Underground
+
+       minetest.register_biome({
+               name = "underground",
+               --node_dust = "",
+               --node_top = "",
+               --depth_top = ,
+               --node_filler = "",
+               --depth_filler = ,
+               --node_stone = "",
+               --node_water_top = "",
+               --depth_water_top = ,
+               --node_water = "",
+               --node_river_water = "",
+               y_min = -31000,
+               y_max = -113,
+               heat_point = 50,
+               humidity_point = 50,
+       })
+end
+
+
+--
+-- Register decorations
+--
+
+-- Mgv6
+
+function default.register_mgv6_decorations()
+       minetest.clear_registered_decorations()
+
+       -- Papyrus
+
+       minetest.register_decoration({
+               deco_type = "simple",
+               place_on = {"default:dirt_with_grass"},
+               sidelen = 16,
+               noise_params = {
+                       offset = -0.3,
+                       scale = 0.7,
+                       spread = {x = 100, y = 100, z = 100},
+                       seed = 354,
+                       octaves = 3,
+                       persist = 0.7
+               },
+               y_min = 1,
+               y_max = 1,
+               decoration = "default:papyrus",
+               height = 2,
+               height_max = 4,
+               spawn_by = "default:water_source",
+               num_spawn_by = 1,
+       })
+
+       -- Cacti
+
+       minetest.register_decoration({
+               deco_type = "simple",
+               place_on = {"default:desert_sand"},
+               sidelen = 16,
+               noise_params = {
+                       offset = -0.012,
+                       scale = 0.024,
+                       spread = {x = 100, y = 100, z = 100},
+                       seed = 230,
+                       octaves = 3,
+                       persist = 0.6
+               },
+               y_min = 1,
+               y_max = 30,
+               decoration = "default:cactus",
+               height = 3,
+               height_max = 4,
+       })
+
+       -- Long grasses
 
        for length = 1, 5 do
                minetest.register_decoration({
@@ -422,214 +1047,419 @@ function default.register_mgv6_decorations()
        })
 end
 
+-- All mapgens except mgv6 and singlenode
 
---
--- Register decorations
---
-
-
-function default.register_decorations()
-
-       -- Flowers
-
+local function register_grass_decoration(offset, scale, length)
        minetest.register_decoration({
                deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               place_on = {"default:dirt_with_grass", "default:sand"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
+                       offset = offset,
+                       scale = scale,
                        spread = {x = 200, y = 200, z = 200},
-                       seed = 436,
+                       seed = 329,
                        octaves = 3,
                        persist = 0.6
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"stone_grassland", "sandstone_grassland",
+                       "deciduous_forest", "coniferous_forest",
+                       "stone_grassland_dunes", "sandstone_grassland_dunes",
+                       "coniferous_forest_dunes"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "flowers:rose",
+               decoration = "default:grass_"..length,
        })
-       
+end
+
+local function register_dry_grass_decoration(offset, scale, length)
        minetest.register_decoration({
                deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               place_on = {"default:dirt_with_dry_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
+                       offset = offset,
+                       scale = scale,
                        spread = {x = 200, y = 200, z = 200},
-                       seed = 19822,
+                       seed = 329,
                        octaves = 3,
                        persist = 0.6
                },
-               biomes = {"default:grassland"},
-               y_min = 33,
+               biomes = {"savanna"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "flowers:tulip",
+               decoration = "default:dry_grass_"..length,
        })
-       
+end
+
+function default.register_decorations()
+       minetest.clear_registered_decorations()
+
+       -- Apple tree and log
+
        minetest.register_decoration({
-               deco_type = "simple",
+               deco_type = "schematic",
                place_on = {"default:dirt_with_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 1220999,
+                       offset = 0.036,
+                       scale = 0.022,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"deciduous_forest"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "flowers:dandelion_yellow",
+               schematic = minetest.get_modpath("default").."/schematics/apple_tree.mts",
+               flags = "place_center_x, place_center_z",
        })
-       
+
        minetest.register_decoration({
-               deco_type = "simple",
+               deco_type = "schematic",
                place_on = {"default:dirt_with_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 36662,
+                       offset = 0.0018,
+                       scale = 0.0011,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"deciduous_forest"},
+               y_min = 1,
+               y_max = 31000,
+               schematic = {
+                       size = {x = 3, y = 3, z = 1},
+                       data = {
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "default:tree", param2 = 12, prob = 191},
+                               {name = "default:tree", param2 = 12},
+                               {name = "default:tree", param2 = 12, prob = 127},
+                               {name = "air", prob = 0},
+                               {name = "flowers:mushroom_brown", prob = 63},
+                               {name = "air", prob = 0},
+                       },
+               },
+               flags = "place_center_x",
+               rotation = "random",
+       })
+
+       -- Jungle tree and log
+
+       minetest.register_decoration({
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_grass", "default:dirt"},
+               sidelen = 80,
+               fill_ratio = 0.1,
+               biomes = {"rainforest", "rainforest_swamp"},
+               y_min = 0,
                y_max = 31000,
-               decoration = "flowers:geranium",
+               schematic = minetest.get_modpath("default").."/schematics/jungle_tree.mts",
+               flags = "place_center_x, place_center_z",
+               rotation = "random",
        })
-       
+
        minetest.register_decoration({
-               deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_grass", "default:dirt"},
+               sidelen = 80,
+               fill_ratio = 0.005,
+               biomes = {"rainforest", "rainforest_swamp"},
+               y_min = 1,
+               y_max = 31000,
+               schematic = {
+                       size = {x = 3, y = 3, z = 1},
+                       data = {
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "default:jungletree", param2 = 12, prob = 191},
+                               {name = "default:jungletree", param2 = 12},
+                               {name = "default:jungletree", param2 = 12, prob = 127},
+                               {name = "air", prob = 0},
+                               {name = "flowers:mushroom_brown", prob = 127},
+                               {name = "air", prob = 0},
+                       },
+               },
+               flags = "place_center_x",
+               rotation = "random",
+       })
+
+       -- Taiga and temperate coniferous forest pine tree and log
+
+       minetest.register_decoration({
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_snow", "default:dirt_with_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 1133,
+                       offset = 0.036,
+                       scale = 0.022,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"taiga", "coniferous_forest"},
+               y_min = 2,
                y_max = 31000,
-               decoration = "flowers:viola",
+               schematic = minetest.get_modpath("default").."/schematics/pine_tree.mts",
+               flags = "place_center_x, place_center_z",
        })
-       
+
        minetest.register_decoration({
-               deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_snow", "default:dirt_with_grass"},
+               sidelen = 80,
+               noise_params = {
+                       offset = 0.0018,
+                       scale = 0.0011,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
+                       octaves = 3,
+                       persist = 0.66
+               },
+               biomes = {"taiga", "coniferous_forest"},
+               y_min = 1,
+               y_max = 31000,
+               schematic = {
+                       size = {x = 3, y = 3, z = 1},
+                       data = {
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "default:pine_tree", param2 = 12, prob = 191},
+                               {name = "default:pine_tree", param2 = 12},
+                               {name = "default:pine_tree", param2 = 12, prob = 127},
+                               {name = "air", prob = 0},
+                               {name = "flowers:mushroom_red", prob = 63},
+                               {name = "air", prob = 0},
+                       },
+               },
+               flags = "place_center_x",
+               rotation = "random",
+       })
+
+       -- Acacia tree and log
+
+       minetest.register_decoration({
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_dry_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.03,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 73133,
+                       offset = 0,
+                       scale = 0.002,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"savanna"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "flowers:dandelion_white",
+               schematic = minetest.get_modpath("default").."/schematics/acacia_tree.mts",
+               flags = "place_center_x, place_center_z",
+               rotation = "random",
        })
 
-       -- Grasses
+       minetest.register_decoration({
+               deco_type = "schematic",
+               place_on = {"default:dirt_with_dry_grass"},
+               sidelen = 16,
+               noise_params = {
+                       offset = 0,
+                       scale = 0.001,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
+                       octaves = 3,
+                       persist = 0.66
+               },
+               biomes = {"savanna"},
+               y_min = 1,
+               y_max = 31000,
+               schematic = {
+                       size = {x = 3, y = 2, z = 1},
+                       data = {
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "default:acacia_tree", param2 = 12, prob = 191},
+                               {name = "default:acacia_tree", param2 = 12},
+                               {name = "default:acacia_tree", param2 = 12, prob = 127},
+                       },
+               },
+               flags = "place_center_x",
+               rotation = "random",
+       })
+
+       -- Aspen tree and log
 
        minetest.register_decoration({
-               deco_type = "simple",
+               deco_type = "schematic",
                place_on = {"default:dirt_with_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = 0.04,
-                       scale = 0.04,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 66440,
+                       offset = 0.0,
+                       scale = -0.015,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"deciduous_forest"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "default:grass_1",
+               schematic = minetest.get_modpath("default").."/schematics/aspen_tree.mts",
+               flags = "place_center_x, place_center_z",
        })
-       
+
        minetest.register_decoration({
-               deco_type = "simple",
+               deco_type = "schematic",
                place_on = {"default:dirt_with_grass"},
                sidelen = 16,
                noise_params = {
-                       offset = 0.02,
-                       scale = 0.06,
-                       spread = {x = 200, y = 200, z = 200},
-                       seed = 66440,
+                       offset = 0.0,
+                       scale = -0.0008,
+                       spread = {x = 250, y = 250, z = 250},
+                       seed = 2,
                        octaves = 3,
-                       persist = 0.6
+                       persist = 0.66
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"deciduous_forest"},
+               y_min = 1,
                y_max = 31000,
-               decoration = "default:grass_2",
+               schematic = {
+                       size = {x = 3, y = 3, z = 1},
+                       data = {
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "air", prob = 0},
+                               {name = "default:aspen_tree", param2 = 12},
+                               {name = "default:aspen_tree", param2 = 12},
+                               {name = "default:aspen_tree", param2 = 12, prob = 127},
+                               {name = "flowers:mushroom_red", prob = 63},
+                               {name = "flowers:mushroom_brown", prob = 63},
+                               {name = "air", prob = 0},
+                       },
+               },
+               flags = "place_center_x",
+               rotation = "random",
        })
-       
+       -- Large cactus
+
        minetest.register_decoration({
-               deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               deco_type = "schematic",
+               place_on = {"default:desert_sand"},
                sidelen = 16,
                noise_params = {
-                       offset = 0,
-                       scale = 0.08,
+                       offset = -0.0003,
+                       scale = 0.0009,
                        spread = {x = 200, y = 200, z = 200},
-                       seed = 66440,
+                       seed = 230,
                        octaves = 3,
                        persist = 0.6
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"desert"},
+               y_min = 5,
                y_max = 31000,
-               decoration = "default:grass_3",
+               schematic = minetest.get_modpath("default").."/schematics/large_cactus.mts",
+               flags = "place_center_x",
+               rotation = "random",
        })
-       
+
+       -- Cactus
+
        minetest.register_decoration({
                deco_type = "simple",
-               place_on = {"default:dirt_with_grass"},
+               place_on = {"default:desert_sand"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.02,
-                       scale = 0.10,
+                       offset = -0.0003,
+                       scale = 0.0009,
                        spread = {x = 200, y = 200, z = 200},
-                       seed = 66440,
+                       seed = 230,
                        octaves = 3,
                        persist = 0.6
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"desert"},
+               y_min = 5,
                y_max = 31000,
-               decoration = "default:grass_4",
+               decoration = "default:cactus",
+               height = 2,
+               height_max = 5,
+       })
+
+       -- Papyrus
+
+       minetest.register_decoration({
+               deco_type = "schematic",
+               place_on = {"default:dirt"},
+               sidelen = 16,
+               noise_params = {
+                       offset = -0.3,
+                       scale = 0.7,
+                       spread = {x = 200, y = 200, z = 200},
+                       seed = 354,
+                       octaves = 3,
+                       persist = 0.7
+               },
+               biomes = {"savanna_swamp"},
+               y_min = 0,
+               y_max = 0,
+               schematic = minetest.get_modpath("default").."/schematics/papyrus.mts",
        })
-       
+
+       -- Grasses
+
+       register_grass_decoration(-0.03,  0.09,  5)
+       register_grass_decoration(-0.015, 0.075, 4)
+       register_grass_decoration(0,      0.06,  3)
+       register_grass_decoration(0.015,  0.045, 2)
+       register_grass_decoration(0.03,   0.03,  1)
+
+       -- Dry grasses
+
+       register_dry_grass_decoration(0.01, 0.05,  5)
+       register_dry_grass_decoration(0.03, 0.03,  4)
+       register_dry_grass_decoration(0.05, 0.01,  3)
+       register_dry_grass_decoration(0.07, -0.01, 2)
+       register_dry_grass_decoration(0.09, -0.03, 1)
+
+       -- Junglegrass
+
        minetest.register_decoration({
                deco_type = "simple",
                place_on = {"default:dirt_with_grass"},
+               sidelen = 80,
+               fill_ratio = 0.1,
+               biomes = {"rainforest"},
+               y_min = 1,
+               y_max = 31000,
+               decoration = "default:junglegrass",
+       })
+
+       -- Dry shrub
+
+       minetest.register_decoration({
+               deco_type = "simple",
+               place_on = {"default:desert_sand", "default:dirt_with_snow"},
                sidelen = 16,
                noise_params = {
-                       offset = -0.04,
-                       scale = 0.12,
+                       offset = 0,
+                       scale = 0.02,
                        spread = {x = 200, y = 200, z = 200},
-                       seed = 66440,
+                       seed = 329,
                        octaves = 3,
                        persist = 0.6
                },
-               biomes = {"default:grassland"},
-               y_min = -31000,
+               biomes = {"desert", "tundra"},
+               y_min = 2,
                y_max = 31000,
-               decoration = "default:grass_5",
+               decoration = "default:dry_shrub",
        })
 end
 
@@ -638,74 +1468,12 @@ end
 -- Detect mapgen to select functions
 --
 
-
--- Mods using singlenode mapgen can call these functions to enable
--- the use of minetest.generate_ores or minetest.generate_decorations
-
-local mg_params = minetest.get_mapgen_params()
-if mg_params.mgname == "v6" then
+local mg_name = minetest.get_mapgen_setting("mg_name")
+if mg_name == "v6" then
        default.register_ores()
        default.register_mgv6_decorations()
-elseif mg_params.mgname ~= "singlenode" then
-       default.register_ores()
+else
        default.register_biomes()
+       default.register_ores()
        default.register_decorations()
 end
-
-
---
--- Generate nyan cats in all mapgens
---
-
-
--- facedir: 0/1/2/3 (head node facedir value)
--- length: length of rainbow tail
-function default.make_nyancat(pos, facedir, length)
-       local tailvec = {x = 0, y = 0, z = 0}
-       if facedir == 0 then
-               tailvec.z = 1
-       elseif facedir == 1 then
-               tailvec.x = 1
-       elseif facedir == 2 then
-               tailvec.z = -1
-       elseif facedir == 3 then
-               tailvec.x = -1
-       else
-               --print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
-               facedir = 0
-               tailvec.z = 1
-       end
-       local p = {x = pos.x, y = pos.y, z = pos.z}
-       minetest.set_node(p, {name = "default:nyancat", param2 = facedir})
-       for i = 1, length do
-               p.x = p.x + tailvec.x
-               p.z = p.z + tailvec.z
-               minetest.set_node(p, {name = "default:nyancat_rainbow", param2 = facedir})
-       end
-end
-
-
-function default.generate_nyancats(minp, maxp, seed)
-       local height_min = -31000
-       local height_max = -32
-       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 + 9324342)
-       local max_num_nyancats = math.floor(volume / (16 * 16 * 16))
-       for i = 1, max_num_nyancats do
-               if pr:next(0, 1000) == 0 then
-                       local x0 = pr:next(minp.x, maxp.x)
-                       local y0 = pr:next(minp.y, maxp.y)
-                       local z0 = pr:next(minp.z, maxp.z)
-                       local p0 = {x = x0, y = y0, z = z0}
-                       default.make_nyancat(p0, pr:next(0, 3), pr:next(3, 15))
-               end
-       end
-end
-
-
-minetest.register_on_generated(default.generate_nyancats)