write something there

mods/minetest_game/flowers/mapgen.lua

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+--
+-- Mgv6
+--
+
+local function register_mgv6_flower(flower_name)
+	minetest.register_decoration({
+		name = "flowers:"..flower_name,
+		deco_type = "simple",
+		place_on = {"default:dirt_with_grass"},
+		sidelen = 16,
+		noise_params = {
+			offset = 0,
+			scale = 0.006,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 436,
+			octaves = 3,
+			persist = 0.6
+		},
+		y_max = 30,
+		y_min = 1,
+		decoration = "flowers:"..flower_name,
+	})
+end
+
+local function register_mgv6_mushroom(mushroom_name)
+	minetest.register_decoration({
+		name = "flowers:"..mushroom_name,
+		deco_type = "simple",
+		place_on = {"default:dirt_with_grass"},
+		sidelen = 16,
+		noise_params = {
+			offset = 0,
+			scale = 0.04,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 7133,
+			octaves = 3,
+			persist = 0.6
+		},
+		y_max = 30,
+		y_min = 1,
+		decoration = "flowers:"..mushroom_name,
+		spawn_by = "default:tree",
+		num_spawn_by = 1,
+	})
+end
+
+local function register_mgv6_waterlily()
+	minetest.register_decoration({
+		name = "flowers:waterlily",
+		deco_type = "simple",
+		place_on = {"default:dirt"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.12,
+			scale = 0.3,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 33,
+			octaves = 3,
+			persist = 0.7
+		},
+		y_max = 0,
+		y_min = 0,
+		decoration = "flowers:waterlily_waving",
+		param2 = 0,
+		param2_max = 3,
+		place_offset_y = 1,
+	})
+end
+
+function flowers.register_mgv6_decorations()
+	register_mgv6_flower("rose")
+	register_mgv6_flower("tulip")
+	register_mgv6_flower("dandelion_yellow")
+	register_mgv6_flower("geranium")
+	register_mgv6_flower("viola")
+	register_mgv6_flower("dandelion_white")
+
+	register_mgv6_mushroom("mushroom_brown")
+	register_mgv6_mushroom("mushroom_red")
+
+	register_mgv6_waterlily()
+end
+
+
+--
+-- All other biome API mapgens
+--
+
+local function register_flower(seed, flower_name)
+	minetest.register_decoration({
+		name = "flowers:"..flower_name,
+		deco_type = "simple",
+		place_on = {"default:dirt_with_grass"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.02,
+			scale = 0.04,
+			spread = {x = 200, y = 200, z = 200},
+			seed = seed,
+			octaves = 3,
+			persist = 0.6
+		},
+		biomes = {"grassland", "deciduous_forest"},
+		y_max = 31000,
+		y_min = 1,
+		decoration = "flowers:"..flower_name,
+	})
+end
+
+local function register_mushroom(mushroom_name)
+	minetest.register_decoration({
+		name = "flowers:"..mushroom_name,
+		deco_type = "simple",
+		place_on = {"default:dirt_with_grass", "default:dirt_with_coniferous_litter"},
+		sidelen = 16,
+		noise_params = {
+			offset = 0,
+			scale = 0.006,
+			spread = {x = 250, y = 250, z = 250},
+			seed = 2,
+			octaves = 3,
+			persist = 0.66
+		},
+		biomes = {"deciduous_forest", "coniferous_forest"},
+		y_max = 31000,
+		y_min = 1,
+		decoration = "flowers:"..mushroom_name,
+	})
+end
+
+local function register_waterlily()
+	minetest.register_decoration({
+		name = "default:waterlily",
+		deco_type = "simple",
+		place_on = {"default:dirt"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.12,
+			scale = 0.3,
+			spread = {x = 200, y = 200, z = 200},
+			seed = 33,
+			octaves = 3,
+			persist = 0.7
+		},
+		biomes = {"rainforest_swamp", "savanna_shore", "deciduous_forest_shore"},
+		y_max = 0,
+		y_min = 0,
+		decoration = "flowers:waterlily_waving",
+		param2 = 0,
+		param2_max = 3,
+		place_offset_y = 1,
+	})
+end
+
+function flowers.register_decorations()
+	register_flower(436,     "rose")
+	register_flower(19822,   "tulip")
+	register_flower(1220999, "dandelion_yellow")
+	register_flower(800081,  "chrysanthemum_green")
+	register_flower(36662,   "geranium")
+	register_flower(1133,    "viola")
+	register_flower(73133,   "dandelion_white")
+	register_flower(42,      "tulip_black")
+
+	register_mushroom("mushroom_brown")
+	register_mushroom("mushroom_red")
+
+	register_waterlily()
+end
+
+
+--
+-- Detect mapgen to select functions
+--
+
+local mg_name = minetest.get_mapgen_setting("mg_name")
+if mg_name == "v6" then
+	--flowers.register_mgv6_decorations()
+else
+	--flowers.register_decorations()
+end