add compatibility for games other than minetest_game

API.txt

@@ -588,3 +588,43 @@ And this particular one is mapped slightly differently from the others:
 
 (Note the +150 and +50 offsets)
 
+
+==================
+Default game nodes
+==================
+
+Although this project was intended to be used with minetest_game, it can be
+configured to work with something else instead.  All you need to do is provide
+the names of the nodes in your game you want biome_lib's internals to use.
+
+Put these settings in your game's minetest.conf (or your client's own config,
+if desired).  You'll need to set all of them.
+
+biome_lib_default_grow_through_nodes
+	Comma-separated list of things that a spawned node is allowed to grow
+	through.  Air is always added to whatever you specify.
+	Default:  air, default:snow
+
+biome_lib_default_water_nodes
+	Comma-separated list of nodes that should be treated as water for the sake
+	of looking for neighboring "wet" ground.
+	Default: default:water_source, default:water_flowing,
+		default:river_water_source, default:river_water_flowing
+
+biome_lib_default_wet_surfaces
+	Comma-separated list of nodes that should be considered "wet" if one of
+	the aforementioned water nodes is nearby.
+	Default: default:dirt, default:dirt_with_grass, default:sand
+
+biome_lib_default_grow_nodes
+	Comma-separated list of nodes that something must be sitting on to be
+	able to actively change from one thing to another (such as a sapling
+	growing into a tree), to be used for ALL growable nodes, if the calling
+	mod doesn't provide its own lists.
+	Default: "default:dirt_with_grass"
+
+biome_lib_default_ground_nodes
+	Comma-separated list of nodes to use as the "root" of something that can
+	gradually climb up a wall, to be used for ALL such nodes, if the calling
+	mod doesn't provide its own lists.
+	Default: "default:dirt_with_grass"

README.md

@@ -12,7 +12,7 @@ Both mapgen-based spawning and ABM-based spawning is supported. Growing code is
 
 It is primarily intended for mapgen v6, but it should work fine when used with mapgen v7.
 
-**Dependencies**: default from minetest_game
+**Dependencies:** nothing, but if you don't use `minetest_game`, you'll need to supply some settings (see API.txt).
 
 **Recommends**: [Plantlife Modpack](https://github.com/minetest-mods/plantlife_modpack), 
 [More Trees](https://github.com/minetest-mods/moretrees)

growth.lua

@@ -20,8 +20,8 @@ function biome_lib:grow_plants(opts)
 	local options = opts
 
 	options.height_limit = options.height_limit or 5
-	options.ground_nodes = options.ground_nodes or { "default:dirt_with_grass" }
-	options.grow_nodes = options.grow_nodes or { "default:dirt_with_grass" }
+	options.ground_nodes = options.ground_nodes or biome_lib.default_ground_nodes
+	options.grow_nodes = options.grow_nodes or biome_lib.default_grow_nodes
 	options.seed_diff = options.seed_diff or 0
 
 	local n
@@ -55,7 +55,7 @@ function biome_lib:grow_plants(opts)
 			if options.need_wall and options.verticals_list then
 				walldir = biome_lib:find_adjacent_wall(p_top, options.verticals_list, options.choose_random_wall)
 			end
-			if (n_top.name == "air" or n_top.name == "default:snow")
+			if biome_lib.default_grow_through_nodes[n_top.name]
 			  and (not options.need_wall or (options.need_wall and walldir)) then
 				if options.grow_vertically and walldir then
 					if biome_lib:search_downward(pos, options.height_limit, options.ground_nodes) then

init.lua

@@ -32,6 +32,41 @@ biome_lib.total_no_aircheck_calls = 0
 
 biome_lib.queue_run_ratio = tonumber(minetest.settings:get("biome_lib_queue_run_ratio")) or 100
 
+local function tableize(s)
+	return string.split(string.trim(string.gsub(s, " ", "")))
+end
+
+local c1 minetest.settings:get("biome_lib_default_grow_through_nodes")
+biome_lib.default_grow_through_nodes = {["air"] = true}
+if c1 then
+	for _, i in ipairs(tableize(c1)) do
+		biome_lib.default_grow_through_nodes[i] = true
+	end
+else
+	biome_lib.default_grow_through_nodes["default:snow"] = true
+end
+
+local c2 minetest.settings:get("biome_lib_default_water_nodes")
+biome_lib.default_water_nodes = {}
+if c2 then
+	for _, i in ipairs(tableize(c2)) do
+		biome_lib.default_water_nodes[i] = true
+	end
+else
+	biome_lib.default_water_nodes["default:water_source"] = true
+	biome_lib.default_water_nodes["default:water_flowing"] = true
+	biome_lib.default_water_nodes["default:river_water_source"] = true
+	biome_lib.default_water_nodes["default:river_water_flowing"] = true
+end
+
+local c3 = minetest.settings:get("biome_lib_default_wet_surfaces")
+local c4 = minetest.settings:get("biome_lib_default_ground_nodes")
+local c5 = minetest.settings:get("biome_lib_default_grow_nodes")
+
+biome_lib.default_wet_surfaces = c3 and tableize(c3) or {"default:dirt", "default:dirt_with_grass", "default:sand"}
+biome_lib.default_ground_nodes = c4 and tableize(c4) or {"default:dirt_with_grass"}
+biome_lib.default_grow_nodes =   c5 and tableize(c5) or {"default:dirt_with_grass"}
+
 -- Boilerplate to support localized strings if intllib mod is installed.
 local S
 if minetest.global_exists("intllib") then
@@ -617,11 +652,11 @@ function biome_lib:spawn_on_surfaces(sd,sp,sr,sc,ss,sa)
 
 			local currentsurface = minetest.get_node(pos).name
 
-			if currentsurface == "default:water_source" and
+			if biome_lib.default_water_nodes[currentsurface] and
 					#minetest.find_nodes_in_area(
 						{x=pos.x, y=pos.y-biome.depth_max-1, z=pos.z},
 						vector.new(pos),
-						{"default:dirt", "default:dirt_with_grass", "default:sand"}
+						biome_lib.default_wet_surfaces
 					) == 0 then
 				return -- On water but no ground nearby
 			end

mod.conf

@@ -1,4 +1,3 @@
 name = biome_lib
 min_minetest_version = 5.2.0
-depends = default
-optional_depends = intllib
+optional_depends = default, intllib