make kill command support an optional radius param

mods/fl_wildlife/commands.lua

@@ -22,39 +22,55 @@ minetest.register_chatcommand("clearents", {
 
 --override this core command to allow killing mobs
 minetest.override_chatcommand("kill", {
-    params = "<playername|mobname>",
+    params = "<playername|mobname> [<radius>]",
     description = "Kill entity(mob), player, or yourself",
     func = function(name, param)
-        local player = minetest.get_player_by_name(param)
+        local split_param = param:split(" ")
+        local target = split_param[1]
+        local radius = split_param[2] and tonumber(split_param[2]) or nil
+        local player = minetest.get_player_by_name(target)
 
         if player then
             if minetest.settings:get_bool("enable_damage") == false then
                 return false, "You can not kill players as damage is disabled"
             end
 
             if player:get_hp() <= 0 then
-                return false, "Target player " .. param .. " is already dead"
+                return false, "Target player " .. target .. " is already dead"
             end
 
             player:set_hp(0)
-            return true, "Player " .. param .. " killed"
+            return true, "Player " .. target .. " killed"
         end
 
-        local entity = minetest.registered_entities[param]
+        local entity = minetest.registered_entities[target]
 
         if entity then
             local removed_ent_count = 0
+            local command_player = minetest.get_player_by_name(name)
+
+            if radius and not command_player then
+                return false, "Only in game players can use the radius parameter"
+            end
+
+            --command player pos
+            --set this after the check for command player
+            local cp_pos = command_player:get_pos()
 
             for _, ent in pairs(minetest.luaentities) do
-                if ent.name == param then
+                if ent.name == target then
                     --maybe consider adding a check to see if the entity is a mob
                     --and setting its hp to 0 so it can run its death callback
-                    ent.object:remove()
-                    removed_ent_count = removed_ent_count + 1
+
+                    if (radius and vector.distance(ent.object:get_pos(), cp_pos) <= radius) or not radius then
+                        ent.object:remove()
+                        removed_ent_count = removed_ent_count + 1
+                    end
+
                 end
             end
 
-            return true, "Removed " .. removed_ent_count .. " entities of type " .. param
+            return true, "Removed " .. removed_ent_count .. " entities of type " .. target
         end
 
         return false, "Invalid entity name or player name"