Address more review comments

mods/ITEMS/mcl_bows/arrow.lua

@@ -36,13 +36,15 @@ S("Arrows might get stuck on solid blocks and can be retrieved again. They are a
 })
 
 -- Destroy arrow entity self at pos and drops it as an item
-local function spawn_item(self, pos)
+local function replace_with_item_drop(self, pos)
 	if not minetest.is_creative_enabled("") then
 		local item = minetest.add_item(pos, "mcl_bows:arrow")
 		item:set_velocity(vector.zero())
 		item:set_yaw(self.object:get_yaw())
 	end
+
 	mcl_burning.extinguish(self.object)
+	self._removed = true
 	self.object:remove()
 end
 
@@ -62,13 +64,10 @@ local function stuck_arrow_on_step(self, dtime)
 	-- Drop arrow as item when it is no longer stuck
 	-- FIXME: Arrows are a bit slow to react and continue to float in mid air for a few seconds.
 	if self._stuckrechecktimer > STUCK_RECHECK_TIME then
-		local stuckin_def
-		if self._stuckin then
-			stuckin_def = minetest.registered_nodes[minetest.get_node(self._stuckin).name]
-		end
+		local stuckin_def = self._stuckin and minetest.registered_nodes[minetest.get_node(self._stuckin).name]
 		-- TODO: In MC, arrow just falls down without turning into an item
 		if stuckin_def and stuckin_def.walkable == false then
-			spawn_item(self, pos)
+			replace_with_item_drop(self, pos)
 			return
 		end
 		self._stuckrechecktimer = 0
@@ -153,9 +152,8 @@ local arrow_entity = {
 			end
 		},
 		on_collide_with_solid = function(self, pos, node, node_def)
-			local def = node_def
 			local vel = self.object:get_velocity()
-			local dpos = vector.round(vector.new(pos)) -- digital pos
+			local dpos = vector.round(pos) -- digital pos
 
 			-- Check for the node to which the arrow is pointing
 			local dir
@@ -244,7 +242,7 @@ local arrow_entity = {
 					elseif pointed_thing.type == "node" then
 						local nn = minetest.get_node(minetest.get_pointed_thing_position(pointed_thing)).name
 						local def = minetest.registered_nodes[nn]
-						if (not def) or def.walkable then
+						if not def or def.walkable then
 							-- There's a node in the way. Delete arrow without damage
 							mcl_burning.extinguish(self.object)
 							self.object:remove()
@@ -334,9 +332,6 @@ local arrow_entity = {
 
 		-- Process as projectile
 		vl_projectile.update_projectile(self, dtime)
-
-		-- Update yaw
-		local vel = self.object:get_velocity()
 	end,
 
 	-- Force recheck of stuck arrows when punched.

mods/ITEMS/mcl_potions/splash.lua

@@ -125,14 +125,16 @@ function mcl_potions.register_splash(name, descr, color, def)
 
 				-- Apply effect list
 				if def._effect_list then
-					local ef_level
-					local dur
 					for name, details in pairs(def._effect_list) do
+						local ef_level
+						local dur
+
 						if details.uses_level then
-							ef_level = details.level + details.level_scaling * (potency)
+							ef_level = details.level + details.level_scaling * potency
 						else
 							ef_level = details.level
 						end
+
 						if details.dur_variable then
 							dur = details.dur * math.pow(mcl_potions.PLUS_FACTOR, plus)
 							if potency>0 and details.uses_level then
@@ -142,9 +144,11 @@ function mcl_potions.register_splash(name, descr, color, def)
 						else
 							dur = details.dur
 						end
+
 						if details.effect_stacks then
 							ef_level = ef_level + mcl_potions.get_effect_level(obj, name)
 						end
+
 						if rad > 0 then
 							mcl_potions.give_effect_by_level(name, obj, ef_level, REDUX_MAP[rad]*dur)
 						else

mods/ITEMS/mcl_potions/tipped_arrow.lua

@@ -58,7 +58,7 @@ function mcl_potions.register_arrow(name, desc, color, def)
 				for name, details in pairs(def._effect_list) do
 					local ef_level = details.level
 					if details.uses_level then
-						ef_level = details.level + details.level_scaling * (potency)
+						ef_level = details.level + details.level_scaling * potency
 					end
 
 					local dur = details.dur

mods/ITEMS/mcl_throwing/ender_pearl.lua

@@ -71,10 +71,8 @@ vl_projectile.register("mcl_throwing:ender_pearl_entity",{
 				-- Node is walkable, we have to find a place somewhere outside of that node
 				vc = vector.normalize(vc)
 
-				-- Zero-out the two axes with a lower absolute value than
-				-- the axis with the strongest force
-				local lv, ld
-				lv, ld = math.abs(vc.y), "y"
+				-- Zero-out the two axes with a lower absolute value than the axis with the strongest force
+				local lv, ld = math.abs(vc.y), "y"
 				if math.abs(vc.x) > lv then
 					lv, ld = math.abs(vc.x), "x"
 				end
@@ -122,8 +120,7 @@ vl_projectile.register("mcl_throwing:ender_pearl_entity",{
 			player:set_hp(player:get_hp() - 5, { type = "fall", from = "mod" })
 
 			-- 5% chance to spawn endermite at the player's origin
-			local r = math.random(1,20)
-			if r == 1 then
+			if math.random(1,20) == 1 then
 				minetest.add_entity(oldpos, "mobs_mc:endermite")
 			end
 		end

mods/ITEMS/vl_projectile/init.lua

@@ -22,8 +22,8 @@ function mod.projectile_physics(obj, entity_def, v, a)
 		v,a = vl_physics.apply_entity_environmental_physics(obj)
 	else
 		-- Simple physics
-		if not v then v = obj:get_velocity() end
-		if not a then a = vector.zero() end
+		v = v or obj:get_velocity()
+		a = a or vector.zero()
 
 		if not entity_def.ignore_gravity then
 			a = a + vector.new(0,-GRAVITY,0)
@@ -72,8 +72,7 @@ function mod.update_projectile(self, dtime)
 	-- Run behaviors
 	local behaviors = entity_vl_projectile.behaviors or {}
 	for i=1,#behaviors do
-		local behavior = behaviors[i]
-		if behavior(self, dtime, entity_def, entity_vl_projectile) then
+		if behaviors[i](self, dtime, entity_def, entity_vl_projectile) then
 			return
 		end
 	end
@@ -81,8 +80,6 @@ function mod.update_projectile(self, dtime)
 	mod.projectile_physics(self.object, entity_def)
 end
 
-local function no_op()
-end
 local function damage_particles(pos, is_critical)
 	if is_critical then
 		minetest.add_particlespawner({
@@ -102,20 +99,6 @@ local function damage_particles(pos, is_critical)
 		})
 	end
 end
-local function random_arrow_positions(positions, placement)
-	if positions == "x" then
-		return math.random(-4, 4)
-	elseif positions == "y" then
-		return math.random(0, 10)
-	end
-	if placement == "front" and positions == "z" then
-		return 3
-	elseif placement == "back" and positions == "z" then
-		return -3
-	end
-	return 0
-end
-
 local function random_hit_positions(positions, placement)
 	if positions == "x" then
 		return math.random(-4, 4)
@@ -170,8 +153,8 @@ local function handle_player_sticking(self, entity_def, projectile_def, entity)
 	local placement = self._placement == 1 and "front" or "back"
 	self._rotation_station = self.placement == 1 and -90 or 90
 	self._in_player = true
-	self._y_position = random_arrow_positions("y", placement)
-	self._x_position = random_arrow_positions("x", placement)
+	self._y_position = random_hit_positions("y", placement)
+	self._x_position = random_hit_positions("x", placement)
 	if self._y_position > 6 and self._x_position < 2 and self._x_position > -2 then
 		self._attach_parent = "Head"
 		self._y_position = self._y_position - 6
@@ -187,10 +170,10 @@ local function handle_player_sticking(self, entity_def, projectile_def, entity)
 		self._attach_parent = "Body"
 	end
 	self._z_rotation = math.random(-30, 30)
-	self._y_rotation = math.random( -30, 30)
+	self._y_rotation = math.random(-30, 30)
 	self.object:set_attach(
 		entity, self._attach_parent,
-		vector.new(self._x_position, self._y_position, random_arrow_positions("z", placement)),
+		vector.new(self._x_position, self._y_position, random_hit_positions("z", placement)),
 		vector.new(0, self._rotation_station + self._y_rotation, self._z_rotation)
 	)
 end
@@ -226,12 +209,12 @@ function mod.collides_with_solids(self, dtime, entity_def, projectile_def)
 	end
 
 	-- Call entity collied hook
-	local hook = projectile_def.on_collide_with_solid or no_op
-	hook(self, pos, node, node_def)
+	local hook = projectile_def.on_collide_with_solid
+	if hook then hook(self, pos, node, node_def) end
 
 	-- Call node collided hook
-	local hook = ((node_def and node_def._vl_projectile) or {}).on_collide or no_op
-	hook(self, pos, node, node_def)
+	local hook = node_def and node_def._vl_projectile and node_def._vl_projectile.on_collide
+	if hook then hook(self, pos, node, node_def) end
 
 	-- Play sounds
 	local sounds = projectile_def.sounds or {}
@@ -280,7 +263,7 @@ local function handle_entity_collision(self, entity_def, projectile_def, object)
 			do_damage = true
 
 			handle_player_sticking(self, entity_def, projectile_def, object)
-		elseif object_lua and (object_lua.is_mob == true or object_lua._hittable_by_projectile) and (self_vl_projectile.owner ~= object) then
+		elseif object_lua and (object_lua.is_mob or object_lua._hittable_by_projectile) and self_vl_projectile.owner ~= object then
 			do_damage = true
 		end
 
@@ -298,16 +281,17 @@ local function handle_entity_collision(self, entity_def, projectile_def, object)
 	end
 
 	-- Call entity collision hook
-	(projectile_def.on_collide_with_entity or no_op)(self, pos, object)
+	local hook = projectile_def.on_collide_with_entity
+	if hook then hook(self, pos, object) end
 
 	-- Call reverse entity collision hook
 	local other_entity_def = minetest.registered_entities[object.name] or {}
 	local other_entity_vl_projectile = other_entity_def._vl_projectile or {}
-	local hook = (other_entity_vl_projectile or {}).on_collide or no_op
-	hook(object, self)
+	local hook = other_entity_vl_projectile and other_entity_vl_projectile.on_collide
+	if hook then hook(object, self) end
 
 	-- Play sounds
-	local sounds = (projectile_def.sounds or {})
+	local sounds = projectile_def.sounds or {}
 	local sound = sounds.on_entity_collion or sounds.on_collision
 	if type(sound) == "function" then sound = sound(self, entity_def, projectile_def, "entity", object) end
 	if sound then
@@ -339,7 +323,7 @@ function mod.collides_with_entities(self, dtime, entity_def, projectile_def)
 		if entity and entity.name ~= self.object:get_luaentity().name then
 			if object:is_player() and owner ~= object:get_player_name() then
 				return handle_entity_collision(self, entity_def, projectile_def, object)
-			elseif (entity.is_mob == true or entity._hittable_by_projectile) and (owner ~= object) then
+			elseif (entity.is_mob or entity._hittable_by_projectile) and owner ~= object then
 				return handle_entity_collision(self, entity_def, projectile_def, object)
 			end
 		end
@@ -347,8 +331,7 @@ function mod.collides_with_entities(self, dtime, entity_def, projectile_def)
 end
 
 function mod.raycast_collides_with_entities(self, dtime, entity_def, projectile_def)
-	local closest_object
-	local closest_distance
+	local closest_object, closest_distance
 
 	local pos = self.object:get_pos()
 	local arrow_dir = self.object:get_velocity()
@@ -377,8 +360,14 @@ function mod.create(entity_id, options)
 	local obj = minetest.add_entity(pos, entity_id, options.staticdata)
 
 	-- Set initial velocity and acceleration
-	local v = vector.multiply(options.dir or vector.zero(), options.velocity or 0)
-	local a = vector.multiply(v, -math.abs(options.drag))
+	local a, v
+	if options.dir then
+		v = vector.multiply(options.dir, options.velocity or 0)
+		a = vector.multiply(v, -math.abs(options.drag))
+	else
+		a = vector.zero()
+		v = a
+	end
 	mod.projectile_physics(obj, entity_def, v, a)
 
 	-- Update projectile parameters