fix instancing issue

init.lua

@@ -191,19 +191,25 @@ local sounds = {
 		gain = 2.2,
 		max_hear_distance = 10,
 		loop = false,
+		pitch = 1,
 	},
 	engine_boost = {
 		sound_name = "sum_airship_lip_trill",
 		gain = 40,
 		max_hear_distance = 10,
 		loop = false,
+		pitch = 1,
 	},
 }
 
 function boat.sound_play(self, sound_obj, sound_instance)
-	local params = sound_obj
+	sound_instance.handle = minetest.sound_play(sound_obj.sound_name, {
-	params.object = self.object
+		gain = sound_obj.gain,
-	sound_instance.handle = minetest.sound_play(sound_obj.sound_name, params)
+		max_hear_distance = sound_obj.max_hear_distance,
+		loop = sound_obj.loop,
+		pitch = sound_obj.pitch or 1,
+		object = self.object,
+	})
 	sound_instance.playing = true
 	sound_instance.time_elapsed = 0
 end
@@ -220,7 +226,7 @@ end
 function boat.update_sound(self, dtime, forward)
 	local fuel = self._fuel
 	local is_thrust = forward ~= 0 and self._driver
-	if not fuel or not type(fuel) == "number" then return false end
+	if not fuel or not type(fuel) == "number" then self._fuel = 0 end
 
 	if self._sounds.engine.time_elapsed > 2.1
 	and self._sounds.engine.handle
@@ -251,23 +257,6 @@ function boat.update_sound(self, dtime, forward)
 	end
 end
 
--- function boat.update_sound(self, forward, dtime)
--- 	if math.abs(forward) > 0 then
--- 		if not self._sounds.engine.playing then
--- 			self._sounds.engine.playing = true
--- 			self._sounds.engine.handle = minetest.sound_play("sum_airship_lip_trill", {
--- 				gain = 0.3,
--- 				object = self.object,
--- 				max_hear_distance = 10,
--- 				loop = true,
--- 			})
--- 		end
--- 	elseif forward == 0	and self._sounds.engine.playing then
--- 		minetest.sound_stop(self._sounds.engine.handle)
--- 		self._sounds.engine.playing = false
--- 	end
--- end
-
 minetest.register_on_respawnplayer(detach_object)
 
 function boat.on_rightclick(self, clicker)
@@ -285,7 +274,6 @@ function boat.on_rightclick(self, clicker)
 			gain = 1,
 			object = self.object,
 		})
-	elseif self._passenger or not clicker or clicker:get_attach() then
 	else
 		attach_object(self, clicker)
 	end
@@ -536,9 +524,8 @@ function boat.on_step(self, dtime, moveresult)
 	self.object:set_acceleration(vel)
 
 	local chimney_pos = boat.get_chimney_pos(self)
-	if true or has_controls then -- only do it if you got the input
+
 	boat.update_sound(self, dtime, forward)
-	end
 
 	local is_thrust = self._driver and forward ~= 0
 
@@ -619,6 +606,21 @@ for b=1, #boat_ids do
 			end
 			local boat = minetest.add_entity(pos, "sum_airship:boat")
 			local texture = "sum_airship_texture_"..images[b].."_boat.png"
+			local luaent = boat:get_luaentity()
+			luaent._sounds = { -- workaround for copy vs reference issue
+				engine = {
+					handle = nil,
+					gain = 0.1,
+					playing = false,
+					time_elapsed = 0,
+				},
+				engine_stop = {
+					handle = nil,
+					gain = 0.1,
+					playing = false,
+					time_elapsed = 0,
+				},
+			}
 			boat:get_luaentity()._itemstring = itemstring
 			boat:set_properties({textures = { texture, texture, texture, texture, texture }})
 			boat:set_yaw(placer:get_look_horizontal())