add do_stay_near function, fix annoying pathfinding sounds and toolrank wear

api.lua

@@ -6,7 +6,7 @@ local use_cmi = minetest.global_exists("cmi")
 
 mobs = {
 	mod = "redo",
-	version = "20190117",
+	version = "20190124",
 	intllib = S,
 	invis = minetest.global_exists("invisibility") and invisibility or {},
 }
@@ -466,10 +466,9 @@ function mob_class:attempt_flight_correction()
 		searchnodes = {self.fly_in}
 	end
 
-	local r = 1
 	local flyable_nodes = minetest.find_nodes_in_area(
-		{x = pos.x - r, y = pos.y - r, z = pos.z - r},
-		{x = pos.x + r, y = pos.y + r, z = pos.z + r},
+		{x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
+		{x = pos.x + 1, y = pos.y + 1, z = pos.z + 1},
 		searchnodes)
 
 	if #flyable_nodes < 1 then
@@ -520,6 +519,57 @@ function mob_class:flight_check()
 end
 
 
+-- if self.stay_near set then check periodically for nodes and turn to face/move
+function mob_class:do_stay_near()
+
+	if not self.stay_near then return false end
+
+	local pos = self.object:get_pos()
+	local searchnodes = self.stay_near[1]
+	local chance = self.stay_near[2] or 10
+
+	if random(1, chance) > 1 then
+		return false
+	end
+
+	if type(searchnodes) == "string" then
+		searchnodes = {self.stay_near[1]}
+	end
+
+	local r = self.view_range
+	local nearby_nodes = minetest.find_nodes_in_area(
+		{x = pos.x - r, y = pos.y - 1, z = pos.z - r},
+		{x = pos.x + r, y = pos.y + 1, z = pos.z + r},
+		searchnodes)
+
+	if #nearby_nodes < 1 then
+		return false
+	end
+
+	local target = nearby_nodes[math.random(1, #nearby_nodes)]
+	local direction = vector.direction(pos, target)
+
+	local vec = {
+		x = target.x - pos.x,
+		z = target.z - pos.z
+	}
+
+	yaw = (atan(vec.z / vec.x) + pi / 2) - self.rotate
+
+	if target.x > pos.x then
+		yaw = yaw + pi
+	end
+
+	yaw = self:set_yaw(yaw, 4)
+
+	self:set_animation("walk")
+
+	self:set_velocity(self.walk_velocity)
+
+	return true
+end
+
+
 -- custom particle effects
 local effect = function(pos, amount, texture, min_size, max_size, radius, gravity, glow)
 
@@ -1525,7 +1575,7 @@ function mob_class:smart_mobs(s, p, dist, dtime)
 			self.path.stuck_timer = stuck_timeout - 2
 
 			-- frustration! cant find the damn path :(
-			self:mob_sound(self.sounds.random)
+			--self:mob_sound(self.sounds.random)
 		else
 			-- yay i found path
 			self:mob_sound(self.sounds.war_cry)
@@ -2604,7 +2654,7 @@ function mob_class:on_punch(hitter, tflp, tool_capabilities, dir)
 
 	if tr then
 		if weapon_def.original_description then
-			weapon:add_wear(toolranks.new_afteruse(weapon, hitter, nil, {wear = wear}))
+			toolranks.new_afteruse(weapon, hitter, nil, {wear = wear})
 		end
 	else
 		weapon:add_wear(wear)
@@ -3146,6 +3196,8 @@ function mob_class:on_step(dtime)
 	self:do_jump()
 
 	self:do_runaway_from(self)
+
+	self:do_stay_near()
 end
 
 
@@ -3255,6 +3307,7 @@ minetest.register_entity(name, setmetatable({
 	runaway_from = def.runaway_from,
 	owner_loyal = def.owner_loyal,
 	pushable = def.pushable,
+	stay_near = def.stay_near,
 
 	on_spawn = def.on_spawn,
 

api.txt

@@ -44,6 +44,9 @@ functions needed for the mob to work properly which contains the following:
    'fly'           when true allows your mob to fly around instead of walking.
    'fly_in'        holds the node name that the mob flies (or swims) around
                    in e.g. "air" or "default:water_source".
+   'stay_near'     when set allows mobs the chance to stay around certain nodes.
+      'nodes'      string or table of nodes to stay nearby e.g. "farming:straw"
+      'chance'     chance of searching for above node(s), default is 10.
    'runaway'       if true causes animals to turn and run away when hit.
    'pushable'      when true mobs can be pushed by player or other mobs.
    'view_range'    how many nodes in distance the mob can see a player.