scene manager system

autoloads/scene_manager.gd

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+extends Node
+
+
+@export var scene_parent: Node
+
+
+var current_scene: Node
+
+
+func _ready() -> void:
+	var tree = get_tree()
+	# capture main scene
+	if tree.current_scene != self:
+		change_scene(tree.current_scene)
+		tree.current_scene = self
+
+
+func change_scene(new_scene: Node) -> void:
+	# avoid infinite recursion :P
+	if current_scene == new_scene:
+		return
+	# remove current scene
+	if current_scene:
+		scene_parent.remove_child(current_scene)
+		current_scene.queue_free()
+	# add new scene
+	if new_scene.is_inside_tree():
+		new_scene.get_parent().remove_child.call_deferred(new_scene)
+	scene_parent.add_child.call_deferred(new_scene)
+	current_scene = new_scene

autoloads/scene_manager.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://dxrvocxjk8vs3"]
+
+[ext_resource type="Script" path="res://autoloads/scene_manager.gd" id="1_d112a"]
+
+[node name="SceneManager" type="Node" node_paths=PackedStringArray("scene_parent")]
+script = ExtResource("1_d112a")
+scene_parent = NodePath("HBoxContainer/MainView/SubViewportContainer/SubViewport")
+
+[node name="HBoxContainer" type="HBoxContainer" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="SideBar" type="Control" parent="HBoxContainer"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="MainView" type="Control" parent="HBoxContainer"]
+custom_minimum_size = Vector2(288, 216)
+layout_mode = 2
+size_flags_horizontal = 10
+
+[node name="SubViewportContainer" type="SubViewportContainer" parent="HBoxContainer/MainView"]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="SubViewport" type="SubViewport" parent="HBoxContainer/MainView/SubViewportContainer"]
+handle_input_locally = false
+audio_listener_enable_3d = true
+size = Vector2i(288, 216)
+render_target_update_mode = 4