VoxeLibre/mods/MAPGEN/vl_biomes/swampland.lua

local mod_mcl_core = minetest.get_modpath("mcl_core")

-- Swampland
vl_biomes.register_biome({
	name = "Swampland",
	node_top = "mcl_core:dirt_with_grass",
	depth_top = 1,
	node_filler = "mcl_core:dirt",
	depth_filler = 3,
	node_riverbed = "mcl_core:sand",
	depth_riverbed = 2,
	y_min = 1,
	y_max = 23, -- Note: Limited in height!
	humidity_point = 90,
	heat_point = 50,
	_mcl_biome_type = "medium",
	_mcl_water_temp = "ocean",
	_mcl_grass_palette_index = 28,
	_mcl_foliage_palette_index = 5,
	_mcl_water_palette_index = 1,
	_mcl_waterfogcolor = "#617B64",
	_mcl_skycolor = "#78A7FF",
	_shore = {
		node_top = "mcl_core:dirt",
		depth_top = 1,
		y_min = -5,
		y_max = 0,
	},
	_ocean = {
		node_top = "mcl_core:sand",
		depth_top = 1,
		node_filler = "mcl_core:sand",
		depth_filler = 3,
		y_max = -6,
		vertical_blend = 1,
	},
})
-- Swamp oak
mcl_mapgen_core.register_decoration({
	deco_type = "schematic",
	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
	sidelen = 80,
	noise_params = {
		offset = 0.0055,
		scale = 0.0011,
		spread = vector.new(250, 250, 250),
		seed = 5005,
		octaves = 5,
		persist = 0.6,
	},
	biomes = {"Swampland", "Swampland_shore"},
	y_min = 0,
	y_max = vl_biomes.overworld_max,
	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_swamp.mts",
	flags = "place_center_x, place_center_z",
	rotation = "random",
})

-- Lily pad
local lily_schem = {
	{name = "mcl_core:water_source"},
	{name = "mcl_flowers:waterlily"},
}

-- Spawn them in shallow water at ocean level in Swampland.
-- Tweak lilydepth to change the maximum water depth
local lilydepth = 2

for d = 1, lilydepth do
	local height = d + 2
	local y = 1 - d
	table.insert(lily_schem, 1, {name = "air", prob = 0})

	mcl_mapgen_core.register_decoration({
		deco_type = "schematic",
		schematic = {
			size = vector.new(1, height, 1),
			data = lily_schem,
		},
		place_on = "mcl_core:dirt",
		sidelen = 16,
		noise_params = {
			offset = 0,
			scale = 0.3,
			spread = vector.new(100, 100, 100),
			seed = 503,
			octaves = 6,
			persist = 0.7,
		},
		y_min = y,
		y_max = y,
		biomes = {"Swampland_shore"},
		rotation = "random",
	})
end