feat: defined Key Pickup class

src/key_pickup.cpp

@@ -0,0 +1,21 @@
+#include "key_pickup.hpp"
+#include "car_player.hpp"
+#include "rally_rush_game_mode.hpp"
+#include "utils/game_root.hpp"
+
+namespace godot {
+void KeyPickup::_bind_methods() {
+#define CLASSNAME KeyPickup
+}
+
+void KeyPickup::_enter_tree() {
+    this->connect("body_entered", callable_mp(this, &KeyPickup::on_body_entered));
+}
+
+void KeyPickup::on_body_entered(Node *node) {
+    if(!this->is_queued_for_deletion() && cast_to<CarPlayer>(node) != nullptr) {
+        Ref<RallyRushGameMode>(GameRoot3D::get_singleton()->get_game_mode())->notify_key_found();
+        this->queue_free();
+    }
+}
+}

src/key_pickup.hpp

@@ -0,0 +1,17 @@
+#ifndef KEY_PICKUP_HPP
+#define KEY_PICKUP_HPP
+
+#include "godot_cpp/classes/area3d.hpp"
+
+namespace godot {
+class KeyPickup : public Area3D {
+    GDCLASS(KeyPickup, Area3D);
+    static void _bind_methods();
+public:
+    virtual void _enter_tree() override;
+protected:
+    void on_body_entered(Node *node);
+};
+}
+
+#endif // !KEY_PICKUP_HPP

src/register_types.cpp

@@ -1,6 +1,7 @@
 #include "register_types.h"
 #include "car_physics.hpp"
 #include "car_player.hpp"
+#include "key_pickup.hpp"
 #include "rally_rush_game_mode.hpp"
 #include "utils/game_mode.hpp"
 #include "utils/game_root.hpp"
@@ -30,6 +31,7 @@ void initialize_gdextension_types(ModuleInitializationLevel p_level)
     ClassDB::register_class<CarPhysics>();
     ClassDB::register_class<CarPlayer>();
     ClassDB::register_class<RallyRushGameMode>();
+    ClassDB::register_class<KeyPickup>()
 }
 
 extern "C"