godot/Event.gdns

@@ -0,0 +1,8 @@
+[gd_resource type="NativeScript" load_steps=2 format=2]
+
+[ext_resource path="res://gdnative/alai.tres" type="GDNativeLibrary" id=1]
+
+[resource]
+resource_name = "Event"
+class_name = "Event"
+library = ExtResource( 1 )

godot/monitor/Monitor.gd

@@ -50,6 +50,10 @@ var game: Dictionary = {}
 
 
 func _ready() -> void:
+	Event.connect("object_created", self, "_object_created")
+	Event.connect("object_updated", self, "_object_updated")
+	Event.connect("object_removed", self, "_object_removed")
+
 	game_version = get_parent().game_version
 
 	player["rut"] = ""

godot/monitor/Monitor.tscn

@@ -6,6 +6,7 @@
 [node name="Monitor" type="Node"]
 pause_mode = 2
 script = ExtResource( 1 )
+monitor_enabled = true
 
 [node name="MonitorGUI" parent="." instance=ExtResource( 3 )]
 visible = false

godot/project.godot

@@ -15,6 +15,10 @@ config/description="This game is for testing an Artificial Intelligence."
 run/main_scene="res://Main.tscn"
 config/icon="res://icon.png"
 
+[autoload]
+
+Event="*res://Event.gdns"
+
 [display]
 
 window/size/width=512

src/Event.cpp

@@ -0,0 +1,20 @@
+#include "Event.h"
+
+void alai::Event::_register_methods()
+{
+    godot::register_signal<Event>("object_created", "name", GODOT_VARIANT_TYPE_STRING, "state", GODOT_VARIANT_TYPE_STRING, "position", GODOT_VARIANT_TYPE_VECTOR2, "velocity", GODOT_VARIANT_TYPE_VECTOR2);
+    godot::register_signal<Event>("object_updated", "name", GODOT_VARIANT_TYPE_STRING, "state", GODOT_VARIANT_TYPE_STRING, "position", GODOT_VARIANT_TYPE_VECTOR2, "velocity", GODOT_VARIANT_TYPE_VECTOR2);
+    godot::register_signal<Event>("object_removed", "name", GODOT_VARIANT_TYPE_STRING);
+}
+
+alai::Event::Event()
+{
+}
+
+alai::Event::~Event()
+{
+}
+
+void alai::Event::_init()
+{
+}

src/Event.h

@@ -0,0 +1,47 @@
+#ifndef ALAI_EVENT_H
+#define ALAI_EVENT_H
+
+#include <Godot.hpp>
+#include <Node.hpp>
+
+namespace alai
+{
+    /**
+     * @brief This class provides an event bus for the project.
+     * 
+     * @details This class should be an auto-loaded singleton for the project.
+     * To use this use Event.connect() and Event.emit_signal() to have global signals.
+     */
+    class Event : public godot::Node
+    {
+        GODOT_CLASS(Event, godot::Node)
+        public:
+            /**
+             * @brief This method registers classes with Godot.
+             * 
+             * @details This method registers methods, properties, and signals with the Godot engine.
+             */
+            static void _register_methods();
+
+            /**
+             * @brief Construct a new Event object.
+             * 
+             */
+            Event();
+
+            /**
+             * @brief Destroy the Event object.
+             * 
+             */
+            ~Event();
+
+            /**
+             * @brief Initialize the class from Godot.
+             * 
+             * @details This method is called just once when the Godot engine connects to the instance of the class.
+             */
+            void _init();
+    };
+}
+
+#endif

src/godot.cpp

@@ -1,5 +1,6 @@
 #include <Godot.hpp>
 
+#include "Event.h"
 #include "state_machine/StateMachine.h"
 #include "state_machine/State.h"
 #include "Main.h"
@@ -40,6 +41,7 @@ extern "C" void GDN_EXPORT godot_gdnative_terminate(godot_gdnative_terminate_opt
 extern "C" void GDN_EXPORT godot_nativescript_init(void *handle)
 {
     Godot::nativescript_init(handle);
+    register_class<alai::Event>();
     register_class<StateMachine>();
     register_class<State>();
     register_class<main::Main>();

src/player/Player.cpp

@@ -1,5 +1,7 @@
 #include "player/Player.h"
 
+#include "Event.h"
+
 #include <Camera2D.hpp>
 #include <TileMap.hpp>
 #include <VisibilityNotifier2D.hpp>
@@ -27,9 +29,6 @@ void Player::_register_methods()
     register_property<Player, float>("gravity", &Player::set_gravity, &Player::get_gravity, player::gravity);
     register_property<Player, float>("run_speed", &Player::set_run_speed, &Player::get_run_speed, player::run_speed);
     register_property<Player, bool>("double_jump", &Player::set_double_jump, &Player::get_double_jump, player::double_jump);
-    register_signal<Player>("object_created", "name", GODOT_VARIANT_TYPE_STRING, "state", GODOT_VARIANT_TYPE_STRING, "position", GODOT_VARIANT_TYPE_VECTOR2, "velocity", GODOT_VARIANT_TYPE_VECTOR2);
-    register_signal<Player>("object_updated", "name", GODOT_VARIANT_TYPE_STRING, "state", GODOT_VARIANT_TYPE_STRING, "position", GODOT_VARIANT_TYPE_VECTOR2, "velocity", GODOT_VARIANT_TYPE_VECTOR2);
-    register_signal<Player>("object_removed", "name", GODOT_VARIANT_TYPE_STRING);
 }
 
 Player::Player()
@@ -81,28 +80,16 @@ void Player::_ready()
 }
 
 void Player::_on_monitor_loaded() {
-    auto object_node = get_tree()->get_root()->find_node("Monitor", true, false);
+    auto state = get_node("StateMachine")->get_child(0);
-    if (object_node != nullptr)
+    if (state != nullptr)
     {
-        auto state = get_node("StateMachine")->get_child(0);
+        auto event = get_node<alai::Event>("/root/Event");
-        if (state != nullptr)
+        event->emit_signal("object_created", this->get_name(), state->get_name(), get_global_position(), velocity);
-        {
-            connect("object_created", object_node, "_object_created");
-            connect("object_updated", object_node, "_object_updated");
-            connect("object_removed", object_node, "_object_removed");
-            emit_signal("object_created", this->get_name(), state->get_name(), get_global_position(), velocity);
-        }
-        else
-        {
-            WARN_PRINT("State not found!");
-        }
     }
-#ifndef NDEBUG
     else
     {
-        WARN_PRINT("Monitor not found!");
+        WARN_PRINT("State not found!");
     }
-#endif
 }
 
 void Player::_physics_process(float delta)
@@ -193,7 +180,8 @@ void Player::_physics_process(float delta)
     auto state = get_node("StateMachine")->get_child(0);
     if (state != nullptr)
     {
-        emit_signal("object_updated", this->get_name(), state->get_name(), get_global_position(), velocity);
+        auto event = get_node<alai::Event>("/root/Event");
+        event->emit_signal("object_updated", this->get_name(), state->get_name(), get_global_position(), velocity);
     }
     else
     {