Add initial Lua biomedef support, fixed biome selection

games/minimal/mods/default/init.lua

@@ -1586,6 +1586,82 @@ minetest.register_alias("mapgen_stone_with_coal", "default:stone_with_coal")
 minetest.register_alias("mapgen_stone_with_iron", "default:stone_with_iron")
 minetest.register_alias("mapgen_mese", "default:mese")
 
+minetest.register_biome_groups({
+0.35, 0.30, 0.20
+})
+
+--
+-- Register the biomes for the map generator
+--
+minetest.register_biome({
+	group_id = 0,
+	name = "Ocean",
+	terrain_type = "liquid",
+	node_top = "default:gravel",
+	node_filler = "default:stone",
+	num_top_nodes = 4,
+	height_min = -3000,
+	height_max = 3000,
+	heat_min = -20.0,
+	heat_max = 100.0,
+	humidity_min = 0.0,
+	humidity_max = 100.0,
+	scale = 10.0,
+	offset = -10.0,
+})
+
+minetest.register_biome({
+	group_id = 1,
+	name = "Beach",
+	terrain_type = "normal",
+	node_top = "default:sand",
+	node_filler = "default:stone",
+	num_top_nodes = 5,
+	height_min = -3000,
+	height_max = 3000,
+	heat_min = 60.0,
+	heat_max = 100.0,
+	humidity_min = 0.0,
+	humidity_max = 100.0,
+	scale = 5.0,
+	offset = 5.0,
+})
+
+minetest.register_biome({
+	group_id = 2,
+	name = "Land",
+	terrain_type = "normal",
+	node_top = "default:dirt_with_grass",
+	node_filler = "default:stone",
+	num_top_nodes = 5,
+	height_min = -3000,
+	height_max = 3000,
+	heat_min = -50.0,
+	heat_max = 100.0,
+	humidity_min = 0.0,
+	humidity_max = 100.0,
+	scale = 12.0,
+	offset = 10.0,
+})
+
+minetest.register_biome({
+	group_id = 3,
+	name = "Hills",
+	terrain_type = "normal",
+	node_top = "default:dirt",
+	node_filler = "default:stone",
+	num_top_nodes = 3,
+	height_min = -3000,
+	height_max = 3000,
+	heat_min = -50.0,
+	heat_max = 100.0,
+	humidity_min = 0.0,
+	humidity_max = 100.0,
+	scale = 70.0,
+	offset = 30.0,
+})
+
+
 -- Support old code
 function default.spawn_falling_node(p, nodename)
 	spawn_falling_node(p, nodename)