Add loot to dungeons (#1921)

mods/dungeon_loot/loot.lua

@@ -0,0 +1,62 @@
+dungeon_loot.registered_loot = {
+	-- buckets
+	{name = "bucket:bucket_empty", chance = 0.55},
+	-- water in deserts or above ground, lava otherwise
+	{name = "bucket:bucket_water", chance = 0.45, types = {"sandstone", "desert"}},
+	{name = "bucket:bucket_water", chance = 0.45, y = {0, 32768}, types = {"normal"}},
+	{name = "bucket:bucket_lava", chance = 0.45, y = {-32768, -1}, types = {"normal"}},
+
+	-- various items
+	{name = "default:stick", chance = 0.6, count = {3, 6}},
+	{name = "default:flint", chance = 0.4, count = {1, 3}},
+	{name = "vessels:glass_fragments", chance = 0.35, count = {1, 4}},
+	{name = "carts:rail", chance = 0.35, count = {1, 6}},
+
+	-- farming / consumable
+	{name = "farming:string", chance = 0.5, count = {1, 8}},
+	{name = "farming:wheat", chance = 0.5, count = {2, 5}},
+	{name = "default:apple", chance = 0.4, count = {1, 4}},
+	{name = "farming:seed_cotton", chance = 0.4, count = {1, 4}, types = {"normal"}},
+	{name = "default:cactus", chance = 0.4, count = {1, 4}, types = {"sandstone", "desert"}},
+
+	-- minerals
+	{name = "default:coal_lump", chance = 0.9, count = {1, 12}},
+	{name = "default:gold_ingot", chance = 0.5},
+	{name = "default:steel_ingot", chance = 0.4, count = {1, 6}},
+	{name = "default:mese_crystal", chance = 0.1, count = {2, 3}},
+
+	-- tools
+	{name = "default:sword_wood", chance = 0.6},
+	{name = "default:pick_stone", chance = 0.3},
+	{name = "default:axe_diamond", chance = 0.05},
+
+	-- natural materials
+	{name = "default:sand", chance = 0.8, count = {4, 32}, y = {-64, 32768}, types = {"normal"}},
+	{name = "default:desert_sand", chance = 0.8, count = {4, 32}, y = {-64, 32768}, types = {"sandstone"}},
+	{name = "default:desert_cobble", chance = 0.8, count = {4, 32}, types = {"desert"}},
+	{name = "default:dirt", chance = 0.6, count = {2, 16}, y = {-64, 32768}},
+	{name = "default:obsidian", chance = 0.25, count = {1, 3}, y = {-32768, -512}},
+	{name = "default:mese", chance = 0.15, y = {-32768, -512}},
+}
+
+function dungeon_loot.register(t)
+	if t.name ~= nil then
+		t = {t} -- single entry
+	end
+	for _, loot in ipairs(t) do
+		table.insert(dungeon_loot.registered_loot, loot)
+	end
+end
+
+function dungeon_loot._internal_get_loot(pos_y, dungeontype)
+	-- filter by y pos and type
+	local ret = {}
+	for _, l in ipairs(dungeon_loot.registered_loot) do
+		if l.y == nil or (pos_y >= l.y[1] and pos_y <= l.y[2]) then
+			if l.types == nil or table.indexof(l.types, dungeontype) ~= -1 then
+				table.insert(ret, l)
+			end
+		end
+	end
+	return ret
+end