Cooperate with underworlds mod.

depends.txt

@@ -1,5 +1,8 @@
 default
+bucket?
 dye
 flowers
-vessels
 mobs?
+underworlds?
+vessels
+wooden_bucket?

fungal_tree.lua

@@ -127,6 +127,24 @@ minetest.register_craft({
 	}
 })
 
+minetest.register_craftitem("fun_caves:wooden_bowl", {
+	description = "Wooden Bowl",
+	drawtype = "plantlike",
+	paramtype = "light",
+	tiles = {"fun_caves_wooden_bowl.png"},
+	inventory_image = "fun_caves_wooden_bowl.png",
+	groups = {bowl = 1, dig_immediate = 3},
+})
+
+minetest.register_craft({
+	output = 'fun_caves:wooden_bowl 20',
+	recipe = {
+		{'group:wood', '', 'group:wood'},
+		{'group:wood', '', 'group:wood'},
+		{'', 'group:wood', ''},
+	},
+})
+
 minetest.register_craftitem("fun_caves:disgusting_gruel", {
 	description = "Disgusting Gruel",
 	drawtype = "plantlike",
@@ -164,7 +182,7 @@ minetest.register_craft({
 	replacements = {
 		{'bucket:bucket_water', 'bucket:bucket_water'},
 		{'bucket:bucket_river_water', 'bucket:bucket_river_water'},
-		{'fun_caves:bucket_wood_water', 'fun_caves:bucket_wood_water'},
-		{'fun_caves:bucket_wood_river_water', 'fun_caves:bucket_wood_river_water'},
+		{'wooden_bucket:bucket_wood_water', 'wooden_bucket:bucket_wood_water'},
+		{'wooden_bucket:bucket_wood_river_water', 'wooden_bucket:bucket_wood_river_water'},
 	},
 })

mapgen.lua

@@ -176,21 +176,21 @@ local function generate(p_minp, p_maxp, seed)
 	local csize = vector.add(vector.subtract(maxp, minp), 1)
   local write
 
+
+  if underworlds_mod and underworlds_mod.underzones then
+    local avg = (minp.y + maxp.y) / 2
+    for _, uz in pairs(underworlds_mod.underzones) do
+      if avg <= uz.upper_bound and avg >= uz.lower_bound then
+        return
+      end
+    end
+  end
+
 	if fun_caves_mod.use_bi_hi then
 		heightmap = minetest.get_mapgen_object("heightmap")
 	end
 
 
-	-- use the same seed (based on perlin noise).
-	--do
-	--	local seed = minetest.get_perlin(seed_noise):get2d({x=minp.x, y=minp.z})
-	--	if not (seed and type(seed) == 'number') then
-	--		return
-	--	end
-
-	--	math.randomseed(seed)
-	--end
-
 	-- Correct heightmap.
 	if maxp.y < -300 or minp.y > 300 then
 		for i = 1, #heightmap do

nodes.lua

@@ -5,13 +5,20 @@
 
 local light_max = fun_caves_mod.light_max or 10
 
+if minetest.registered_items['underworlds:black_sand'] then
+  minetest.register_alias("fun_caves:black_sand", 'underworlds:black_sand')
+else
   -- black (oily) sand
   local newnode = fun_caves_mod.clone_node("default:sand")
   newnode.description = "Black Sand"
   newnode.tiles = {"fun_caves_black_sand.png"}
   newnode.groups['falling_node'] = 0
   minetest.register_node("fun_caves:black_sand", newnode)
+end
 
+if minetest.registered_items['underworlds:hot_cobble'] then
+  minetest.register_alias("fun_caves:hot_cobble", 'underworlds:hot_cobble')
+else
   -- cobble, hot - cobble with lava instead of mortar XD
   minetest.register_node("fun_caves:hot_cobble", {
     description = "Hot Cobble",
@@ -24,7 +31,12 @@ minetest.register_node("fun_caves:hot_cobble", {
       footstep = {name="default_stone_footstep", gain=0.25},
     }),
   })
+end
 
+if minetest.registered_items['underworlds:glowing_fungal_stone'] then
+  minetest.register_alias("fun_caves:glowing_fungal_stone", 'underworlds:glowing_fungal_stone')
+  minetest.register_alias("fun_caves:glowing_fungus", 'underworlds:glowing_fungus')
+else
   -- Glowing fungal stone provides an eerie light.
   minetest.register_node("fun_caves:glowing_fungal_stone", {
     description = "Glowing Fungal Stone",
@@ -45,6 +57,7 @@ minetest.register_craftitem("fun_caves:glowing_fungus", {
     inventory_image = "vmg_glowing_fungus.png",
     groups = {dig_immediate = 3},
   })
+end
 
 -- moon glass (glows)
 if not minetest.registered_items['elixirs:moon_glass'] then
@@ -167,6 +180,25 @@ newnode.tiles = {"fun_caves_radioactive_ore.png"}
 newnode.light_source = 4
 minetest.register_node("fun_caves:radioactive_ore", newnode)
 
+if minetest.registered_items['underworlds:thin_ice'] then
+  minetest.register_alias("fun_caves:thin_ice", 'underworlds:thin_ice')
+else
+  -- ice, thin -- transparent
+  minetest.register_node("fun_caves:thin_ice", {
+    description = "Thin Ice",
+    tiles = {"caverealms_thin_ice.png"},
+    is_ground_content = true,
+    groups = {cracky=3},
+    sounds = default.node_sound_glass_defaults(),
+    use_texture_alpha = true,
+    light_source = 1,
+    drawtype = "glasslike",
+    sunlight_propagates = true,
+    freezemelt = "default:water_source",
+    paramtype = "light",
+  })
+end
+
 -- What's a cave without speleothems?
 local spel = {
 	{type1="stalactite", type2="stalagmite", tile="default_stone.png"},
@@ -175,6 +207,12 @@ local spel = {
 	{type1="icicle_down", type2="icicle_up", desc="Icicle", tile="caverealms_thin_ice.png", drop="default:ice"},
 }
 
+if minetest.registered_items['underworlds:stalactite'] then
+  for _, desc in pairs(spel) do
+    minetest.register_alias("fun_caves:"..desc.type1, 'underworlds:'..desc.type1)
+    minetest.register_alias("fun_caves:"..desc.type2, 'underworlds:'..desc.type2)
+  end
+else
   for _, desc in pairs(spel) do
     minetest.register_node("fun_caves:"..desc.type1, {
       description = (desc.desc or "Stalactite"),
@@ -212,6 +250,7 @@ for _, desc in pairs(spel) do
       sounds = default.node_sound_stone_defaults(),
     })
   end
+end
 
 -- spikes, hot -- silicon-based life
 local spike_size = { 1.0, 1.2, 1.4, 1.6, 1.7 }
@@ -265,6 +304,9 @@ newnode.sounds = default.node_sound_dirt_defaults({
 })
 minetest.register_node("fun_caves:stone_with_algae", newnode)
 
+if minetest.registered_items['underworlds:hot_stone'] then
+  minetest.register_alias("fun_caves:hot_stone", 'underworlds:hot_stone')
+else
   -- stone, hot
   minetest.register_node("fun_caves:hot_stone", {
     description = "Hot Stone",
@@ -277,6 +319,7 @@ minetest.register_node("fun_caves:hot_stone", {
       footstep = {name="default_stone_footstep", gain=0.25},
     }),
   })
+end
 
 -- stone with lichen
 newnode = fun_caves_mod.clone_node("default:stone")