make level dynamic from main

godot/Main.tscn

@@ -1,9 +1,8 @@
 [gd_scene load_steps=3 format=2]
 
 [ext_resource path="res://Main.gdns" type="Script" id=1]
-[ext_resource path="res://levels/Level2.tscn" type="PackedScene" id=2]
+[ext_resource path="res://levels/Prototype.tscn" type="PackedScene" id=2]
 
 [node name="Main" type="Node"]
 script = ExtResource( 1 )
-
-[node name="Level2" parent="." instance=ExtResource( 2 )]
+level = ExtResource( 2 )

src/Main.cpp

@@ -9,6 +9,7 @@ void Main::_register_methods()
 {
     register_method("_ready", &Main::_ready);
     register_method("_physics_process", &Main::_physics_process);
+    register_property<Main, Ref<PackedScene>>("level", &Main::set_level, &Main::get_level, NULL, GODOT_METHOD_RPC_MODE_DISABLED, GODOT_PROPERTY_USAGE_DEFAULT, GODOT_PROPERTY_HINT_RESOURCE_TYPE, String("PackedScene"));
     register_property<Main, bool>("full_screen", &Main::set_full_screen, &Main::get_full_screen, main::full_screen);
     register_property<Main, Vector2>("window_size", &Main::set_window_size, &Main::get_window_size, main::window_size);
     register_property<Main, int8_t>("launch_screen", &Main::set_launch_screen, &Main::get_launch_screen, main::launch_screen);
@@ -45,6 +46,11 @@ void Main::_ready()
             _os->get_screen_position(get_launch_screen()) + _os->get_screen_size() *  0.5 - _os->get_window_size() * 0.5
         );
     }
+
+    if (level != NULL)
+    {
+        add_child(level->instance());
+    }
 }
 
 void Main::_physics_process(float delta)
@@ -55,6 +61,16 @@ void Main::_physics_process(float delta)
     }
 }
 
+void Main::set_level(Ref<PackedScene> level)
+{
+    this->level = level;
+}
+
+Ref<PackedScene> Main::get_level()
+{
+    return this->level;
+}
+
 void Main::set_full_screen(bool full_screen)
 {
     this->full_screen = full_screen;

src/Main.h

@@ -5,6 +5,8 @@
 #include <Node.hpp>
 #include <OS.hpp>
 #include <Input.hpp>
+#include <PackedScene.hpp>
+#include <Ref.hpp>
 
 /**
  * @brief This is the godot namespace for all the code included in the library.
@@ -57,6 +59,11 @@ namespace godot
                  */
                 Input *_input;
 
+                /**
+                 * @brief The first level to load
+                 * 
+                 */
+                Ref<PackedScene> level;
                 /**
                  * @brief If the window is full screen or not.
                  * 
@@ -116,6 +123,20 @@ namespace godot
                  */
                 void _physics_process(float delta);
 
+                /**
+                 * @brief Set the level object.
+                 * 
+                 * @param[in] level The new level to load when starting.
+                 */
+                void set_level(Ref<PackedScene> level);
+
+                /**
+                 * @brief Get the level object.
+                 * 
+                 * @return Ref<PackedScene> The level scene to load.
+                 */
+                Ref<PackedScene> get_level();
+
                 /**
                  * @brief Set the full screen object.
                  *