Made map loading work

maps/MapTundra/TestMapTundra.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=13 format=3 uid="uid://b16ysbx7ah03u"]
 
-[ext_resource type="PackedScene" uid="uid://bicg5j33d72ld" path="res://maps/MapTundra.tscn" id="1_2gju5"]
+[ext_resource type="PackedScene" uid="uid://bicg5j33d72ld" path="res://maps/MapTundra/BaseMapTundra.tscn" id="1_2gju5"]
 [ext_resource type="PackedScene" uid="uid://2ch34sio36nv" path="res://entities/Player.tscn" id="2_rlkm5"]
 [ext_resource type="Script" uid="uid://csb0i132lcu0w" path="res://entities/MapCamera.gd" id="3_n77mx"]
 [ext_resource type="PackedScene" uid="uid://bng2mc7fu5aik" path="res://entities/NPC.tscn" id="4_nb1wl"]

meta/OverworldScene.gd

@@ -1,17 +1,18 @@
 class_name OverworldScene extends Node
 
+@export var map:Node3D = null
+
 func _enter_tree() -> void:
 	OVERWORLD.mapChanged.connect(onMapChanged)
 
 func _ready() -> void:
-	onMapChanged(OVERWORLD.newMap, OVERWORLD.playerDestinationNodeName)
+	pass
 
 func _exit_tree() -> void:
 	OVERWORLD.mapChanged.disconnect(onMapChanged)
 
 func onMapChanged(newMap:PackedScene, playerDestinationNodeName:String) -> void:
-	print("New map time.")
+	print("New map time.", newMap)
-	var map = $Map
 	for childScene in map.get_children():
 		map.remove_child(childScene)
 
@@ -22,6 +23,7 @@ func onMapChanged(newMap:PackedScene, playerDestinationNodeName:String) -> void:
 	map.add_child(newMapInstance)
 
 	# Find Player.
+	if playerDestinationNodeName:
 		var player = newMapInstance.get_node("Player")
 		var destNode = newMapInstance.get_node(playerDestinationNodeName)
 		if player && player is Player && destNode:
@@ -29,5 +31,4 @@ func onMapChanged(newMap:PackedScene, playerDestinationNodeName:String) -> void:
 			player.global_rotation.y = destNode.global_rotation.y
 		elif playerDestinationNodeName:
 			push_error("Player, or destination node not found in new map.")
-
 		pass

meta/OverworldScene.tscn

@@ -2,7 +2,8 @@
 
 [ext_resource type="Script" uid="uid://dpvccegdmn7s6" path="res://meta/OverworldScene.gd" id="1_fa54r"]
 
-[node name="OverworldScene" type="Node3D"]
+[node name="OverworldScene" type="Node3D" node_paths=PackedStringArray("map")]
 script = ExtResource("1_fa54r")
+map = NodePath("Map")
 
 [node name="Map" type="Node3D" parent="."]

meta/RootScene.tscn

@@ -10,8 +10,6 @@ overworld = NodePath("OverworldScene")
 initial = NodePath("InitialScene")
 metadata/_custom_type_script = "uid://ml70iui7qpo4"
 
-[node name="InitialScene" parent="." instance=ExtResource("2_hkmoa")]
-visible = false
-
 [node name="OverworldScene" parent="." instance=ExtResource("2_o1wvd")]
-visible = false
+
+[node name="InitialScene" parent="." instance=ExtResource("2_hkmoa")]

singletons/Overworld.gd

@@ -1,34 +1,85 @@
 class_name OverworldSingleton extends Node
 
-signal mapChanged(newMap:PackedScene, playerDestinationNodeName:String)
+signal mapChanged(map:PackedScene, playerDestinationNodeName:String)
 
-var newMap:PackedScene
+
+var newMapPath:String
+var hasFadedOut:bool = false
 var playerDestinationNodeName:String
+var newMapLoaded:bool = false
 
-func _init() -> void:
+func isMapChanging() -> bool:
+	return newMapPath != ""
+
+func _enter_tree() -> void:
 	pass
 
 func _exit_tree() -> void:
 	TRANSITION.fadeOutEnd.disconnect(onFadeOutEnd)
 	TRANSITION.fadeInEnd.disconnect(onFadeInEnd)
 
-func mapChange(map:PackedScene, playerDestinationNodeName:String) -> void:
+func _process(delta:float) -> void:
+	if(!isMapChanging()):
+		return
+
+	var status = ResourceLoader.load_threaded_get_status(newMapPath)
+	if status == ResourceLoader.THREAD_LOAD_FAILED:
+		push_error("Failed to load map: " + newMapPath)
+		newMapPath = ""
+		
+	elif status == ResourceLoader.THREAD_LOAD_INVALID_RESOURCE:
+		push_error("Failed to load map: " + newMapPath)
+		newMapPath = ""
+
+	elif status == ResourceLoader.THREAD_LOAD_IN_PROGRESS:
+		print("Map loading in progress for: " + newMapPath)
+
+	elif status == ResourceLoader.THREAD_LOAD_LOADED:
+		newMapLoaded = true
+		newMapReady()
+
+
+
+func mapChange(map:String, playerDestinationNodeName:String) -> void:
+	# Begin Loading new map
+	newMapPath = map
+	playerDestinationNodeName = playerDestinationNodeName
+	ResourceLoader.load_threaded_request(newMapPath)
+
+	# Begin fadeout
+	hasFadedOut = false
 	TRANSITION.fade(TransitionSingleton.FadeType.FADE_OUT)
 	TRANSITION.fadeOutEnd.connect(onFadeOutEnd)
-	newMap = map
-	self.playerDestinationNodeName = playerDestinationNodeName
 
 func onFadeOutEnd() -> void:
+	# Fade out has occurred, are we still waiting for the map to load?
 	TRANSITION.fadeOutEnd.disconnect(onFadeOutEnd)
+	hasFadedOut = true
+
+	# Make sure we aren't still waiting for the map to load.
+	if !newMapLoaded:
+		return
+	newMapReady()
+
+func newMapReady():
+	if !hasFadedOut:
+		return
+
+	# Instantiate the new map
+	var mapResource = ResourceLoader.load_threaded_get(newMapPath)
+	if mapResource == null:
+		push_error("Failed to load map resource: " + newMapPath)
+		return
+	
+	# Stop tracking new map name
+	newMapPath = ""
+
+	# Emit event
+	mapChanged.emit(mapResource, playerDestinationNodeName)
+
+	# Begin Fade In
 	TRANSITION.fade(TransitionSingleton.FadeType.FADE_IN)
 	TRANSITION.fadeInEnd.connect(onFadeInEnd)
-	mapChanged.emit(newMap, playerDestinationNodeName)
-
 
 func onFadeInEnd() -> void:
 	TRANSITION.fadeInEnd.disconnect(onFadeInEnd)
-	newMap = null
-
-func isMapChanging() -> bool:
-	# If the newMap is set, then we are in the process of changing maps.
-	return newMap != null

ui/mainmenu/MainMenu.gd

@@ -3,6 +3,7 @@ class_name MainMenu extends Control
 @export var btnNewGame:Button
 @export var btnSettings:Button
 @export var settingsMenu:ClosableMenu
+@export_file("*.tscn") var newGameScene:String
 
 func _ready() -> void:
 	btnNewGame.pressed.connect(onNewGamePressed)
@@ -10,6 +11,7 @@ func _ready() -> void:
 
 func onNewGamePressed() -> void:
 	SCENE.setScene(SceneSingleton.SceneType.OVERWORLD)
+	OVERWORLD.mapChange(newGameScene, "PlayerSpawnPoint")
 
 func onSettingsPressed() -> void:
 	print("Settings button pressed")

ui/mainmenu/MainMenu.tscn

@@ -15,6 +15,7 @@ script = ExtResource("1_vp3lc")
 btnNewGame = NodePath("VBoxContainer/NewGame")
 btnSettings = NodePath("VBoxContainer/Settings")
 settingsMenu = NodePath("MainMenuSettings")
+newGameScene = "uid://b16ysbx7ah03u"
 metadata/_custom_type_script = "uid://btfeuku41py2b"
 
 [node name="VBoxContainer" type="VBoxContainer" parent="."]