add ability to read 'looting_level' from tool definition and meta for extra drops

api.lua

@@ -25,7 +25,7 @@ local use_cmi = minetest.global_exists("cmi")
 
 mobs = {
 	mod = "redo",
-	version = "20221031",
+	version = "20221115",
 	intllib = S,
 	invis = minetest.global_exists("invisibility") and invisibility or {}
 }
@@ -773,8 +773,7 @@ function mob_class:item_drop()
 	local pos = self.object:get_pos()
 
 	-- check for drops function
-	self.drops = type(self.drops) == "function"
+	self.drops = type(self.drops) == "function" and self.drops(pos) or self.drops
-		and self.drops(pos) or self.drops
 
 	-- check for nil or no drops
 	if not self.drops or #self.drops == 0 then
@@ -786,6 +785,25 @@ function mob_class:item_drop()
 		and self.cause_of_death.puncher
 		and self.cause_of_death.puncher:is_player()
 
+	-- check for tool 'looting_level' under tool_capabilities as default, or use
+	-- meta string 'looting_level' if found (max looting level is 3).
+	local looting = 0
+
+	if death_by_player then
+
+		local wield_stack = self.cause_of_death.puncher:get_wielded_item()
+		local wield_name = wield_stack:get_name()
+		local wield_stack_meta = wield_stack:get_meta()
+		local item_def = minetest.registered_items[wield_name]
+		local item_looting = item_def and item_def.tool_capabilities and
+				item_def.tool_capabilities.looting_level or 0
+
+		looting = tonumber(wield_stack_meta:get_string("looting_level")) or item_looting
+		looting = min(looting, 3)
+	end
+
+--print("--- looting level", looting)
+
 	local obj, item, num
 
 	for n = 1, #self.drops do
@@ -808,7 +826,7 @@ function mob_class:item_drop()
 
 			-- only drop rare items (drops.min = 0) if killed by player
 			if death_by_player or self.drops[n].min ~= 0 then
-				obj = minetest.add_item(pos, ItemStack(item .. " " .. num))
+				obj = minetest.add_item(pos, ItemStack(item .. " " .. (num + looting)))
 			end
 
 			if obj and obj:get_luaentity() then

api.txt

@@ -715,6 +715,14 @@ This function returns true if the node name given is harmful to the mob (mob_obj
 it is mainly used when a mob is near a node it has to avoid.
 
 
+Looting Level
+-------------
+
+If a tool is used with 'looting_level' defined under tool_capabilities then mobs can drop
+extra items per level up to a maximum of 3 levels.  'looting_level' can also be read from
+the tools own meta to override the default.
+
+
 External Settings for "minetest.conf"
 ------------------------------------
 

readme.MD

@@ -23,7 +23,7 @@ Lucky Blocks: 9
 
 
 Changelog:
-- 1.56 - Added arrow_override function to mob definition to tweak arrow entity settings, tamed monsters no longer despawn when outside loaded map area.
+- 1.56 - Added arrow_override function to mob definition to tweak arrow entity settings, tamed monsters no longer despawn when outside loaded map area, 'looting_level' can be read from tool definition or tool meta to add extra drops when mob killed.
 - 1.55 - Add 'peaceful_player' privelage and setting so mobs don't attack specific players (thanks sfence), add support for MarkBu's pathfinder mod, remove need for default mod
 - 1.54 - Simplified animal breeding function, added editable settings (thanks Wuzzy), Child mobs now take 20 mins to grow up, reverted to simple mob spawning with setting to use area checks, on_flop added, air_damage added.
 - 1.53 - Added 'on_map_load' settings to mobs:spawn so that mobs will only spawn when new areas of map are loaded.