minetest-mod-snow/src/mapgen_v7.lua

--[[minetest.register_biome({
	name           = "snow_biome_default",
	node_dust = "default:snow",
	node_top       = "default:dirt_with_snow",
	depth_top      = 1,
	node_filler    = "default:dirt",
	depth_filler   = 1,
	node_riverbed = "default:sand",
	depth_riverbed = 2,
	y_min     = 5,
	y_max     = 31000,
	heat_point     = 10.0,
	humidity_point = 40.0,
})
]]--
minetest.register_biome({
	name           = "snow_biome_forest",
	node_dust = "default:snow",
	node_top       = "default:dirt_with_snow",
	depth_top      = 1,
	node_filler    = "default:dirt",
	depth_filler   = 2,
	node_riverbed = "default:sand",
	depth_riverbed = 2,
	y_min     = 2,
	y_max     = 31000,
	heat_point     = 20.0,
	humidity_point = 70.0,
})

minetest.register_biome({
	name = "pine_forest",
	node_top = "default:dirt_with_grass",
	depth_top = 1,
	node_filler = "default:dirt",
	depth_filler = 3,
	node_riverbed = "default:sand",
	depth_riverbed = 2,
	y_min = 60,
	y_max = 31000,
	heat_point = 40,
	humidity_point = 68,
})

minetest.register_biome({
	name           = "snow_biome_lush",
	node_dust = "default:snow",
	node_top       = "default:dirt_with_snow",
	depth_top      = 1,
	node_filler    = "default:dirt",
	depth_filler   = 2,
	node_riverbed = "default:sand",
	depth_riverbed = 2,
	y_min     = 2,
	y_max     = 31000,
	heat_point     = 10.0,
	humidity_point = 70.0,
})

minetest.register_biome({
	name           = "snow_biome_alpine",

	node_top       = "default:dirt_with_snow",
	depth_top      = 1,
	node_filler    = "default:stone",

	y_min     = 60,
	y_max     = 31000,
	heat_point     = 10.0,
	humidity_point = 40.0,
})

minetest.register_biome({
	name           = "snow_biome_sand",

	node_top       = "default:sand",
	depth_top      = 3,
	node_filler    = "default:stone",
	depth_filler   = 0,

	y_min     = -2,
	y_max     = 31000,
	heat_point     = 10.0,
	humidity_point = 40.0,
})


--Pine tree.
minetest.register_decoration({
	deco_type = "schematic",
	place_on = {"default:dirt_with_snow", "default:dirt_with_grass"},
	sidelen = 16,
	noise_params = {
		offset = -0.004,
		scale = 0.01,
		spread = {x = 100, y = 100, z = 100},
		seed = 4087,
		octaves = 3,
		persist = 0.7,
	},
	y_max = 31000,
	y_min = 4,
	biomes = {"snowy_grassland", "coniferous_forest", "taiga", "snow_biome_alpine"},
	schematic = minetest.get_modpath("snow").."/schematics/pine.mts",
	flags = "place_center_x, place_center_z",
})

minetest.register_decoration({
	deco_type = "schematic",
	place_on = {"default:dirt_with_snow", "default:dirt_with_grass"},
	sidelen = 16,
	noise_params = {
		--offset = 0.036,
		offset = 0.020,
		scale = 0.002,
		spread = {x = 250, y = 250, z = 250},
		seed = 2861,
		octaves = 3,
		persist = 0.66
	},
	y_max = 31000,
	y_min = 4,
	biomes = {"snow_biome_forest", "pine_forest"},
	schematic = minetest.get_modpath("snow").."/schematics/pine.mts",
	flags = "place_center_x, place_center_z",
})

minetest.register_decoration({
	deco_type = "schematic",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 0.05,
	y_max = 31000,
	y_min = 4,
	biomes = {"snow_biome_lush"},
	schematic = minetest.get_modpath("snow").."/schematics/pine.mts",
	flags = "place_center_x, place_center_z",
})

--Dry shrubs.
minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 0.001,
	y_max = 31000,
	y_min = 1,
	biomes = {"snowy_grassland"},
	decoration = "default:dry_shrub",
})

minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 0.01,
	y_max = 31000,
	y_min = 1,
	biomes = {"snow_biome_forest", "snow_biome_lush"},
	decoration = "default:dry_shrub",
})

--Snow shrubs.
minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 0.005,
	y_max = 31000,
	y_min = 1,
	biomes = {"snowy_grassland"},
	decoration = "snow:shrub_covered",
})

minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 0.05,
	y_max = 31000,
	y_min = 1,
	biomes = {"snow_biome_forest", "snow_biome_lush"},
	decoration = "snow:shrub_covered",
})

-- Snow Flowers
local function register_flower(seed, name)
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"default:dirt_with_snow"},
		sidelen = 16,
		noise_params = {
			offset = -0.015,
			scale = 0.025,
			spread = {x = 200, y = 200, z = 200},
			seed = seed,
			octaves = 3,
			persist = 0.6
		},
		biomes = {"snow_biome_lush", "snow_biome_forest", "taiga", "snowy_grassland", "tundra"},
		y_min = 1,
		y_max = 31000,
		decoration = "snow:flower_"..name,
	})
end

register_flower(436,     "rose")
register_flower(19822,   "tulip")
register_flower(1220999, "dandelion_yellow")
register_flower(36662,   "geranium")
register_flower(1133,    "viola")
register_flower(73133,   "dandelion_white")

--Snow.
minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:dirt_with_snow",
	sidelen = 16,
	fill_ratio = 10,
	y_max = 31000,
	y_min = 1,
	biomes = {"snow_biome_forest", "snow_biome_lush"},
	decoration = "default:snow",
})

minetest.register_decoration({
	deco_type = "simple",
	place_on = "default:stone",
	sidelen = 16,
	fill_ratio = 10,
	y_max = 31000,
	y_min = 1,
	biomes = {"snow_biome_alpine"},
	decoration = "default:snow",
})