7 files changed, 59 insertions, 166 deletions

diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index 46deb67..6e062f9 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -15,7 +15,7 @@ target_sources(crepe PUBLIC
 	CircleCollider.cpp
 	IKeyListener.cpp
 	IMouseListener.cpp
-	LoopManager.cpp
+	Engine.cpp
 	LoopTimer.cpp
 	Asset.cpp
 	EventHandler.cpp
@@ -49,7 +49,8 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	Event.h
 	IKeyListener.h
 	IMouseListener.h
-	LoopManager.h
+	Engine.h
+	Engine.hpp
 	LoopTimer.h
 	Asset.h
 	Button.h
diff --git a/src/crepe/api/Engine.cpp b/src/crepe/api/Engine.cpp
new file mode 100644
index 0000000..8ed55fa
--- /dev/null
+++ b/src/crepe/api/Engine.cpp
@@ -0,0 +1,37 @@
+#include "Engine.h"
+
+using namespace crepe;
+using namespace std;
+
+void Engine::start() {
+	this->setup();
+	this->loop();
+}
+
+void Engine::setup() {
+	LoopTimer & timer = this->loop_timer;
+	this->game_running = true;
+	this->scene_manager.load_next_scene();
+	timer.start();
+	timer.set_fps(200);
+}
+
+void Engine::loop() {
+	LoopTimer & timer = this->loop_timer;
+	SystemManager & systems = this->system_manager;
+
+	timer.start();
+
+	while (game_running) {
+		timer.update();
+
+		while (timer.get_lag() >= timer.get_fixed_delta_time()) {
+			systems.fixed_update();
+			timer.advance_fixed_update();
+		}
+
+		systems.frame_update();
+		timer.enforce_frame_rate();
+	}
+}
+
diff --git a/src/crepe/api/LoopManager.h b/src/crepe/api/Engine.h
index f34a5a0..7601015 100644
--- a/src/crepe/api/LoopManager.h
+++ b/src/crepe/api/Engine.h
@@ -7,21 +7,20 @@
 #include "../manager/ResourceManager.h"
 #include "../manager/SaveManager.h"
 #include "../manager/SceneManager.h"
-#include "../system/System.h"
+#include "../manager/SystemManager.h"
 
 #include "LoopTimer.h"
 
 namespace crepe {
 
 /**
- * \brief Main game loop manager
+ * \brief Main game entrypoint
  *
  * This class is responsible for managing the game loop, including initialization and updating.
  */
-class LoopManager {
+class Engine {
 public:
 	void start();
-	LoopManager();
 
 	/**
 	 * \brief Add a new concrete scene to the scene manager
@@ -45,20 +44,6 @@ private:
 	 */
 	void loop();
 
-	/**
-	 * \brief Per-frame update.
-	 *
-	 * Updates the game state based on the elapsed time since the last frame.
-	 */
-	void frame_update();
-
-	/**
-	 * \brief Fixed update executed at a fixed rate.
-	 *
-	 * This function updates physics and game logic based on LoopTimer's fixed_delta_time.
-	 */
-	void fixed_update();
-
 	bool game_running = false;
 
 private:
@@ -79,31 +64,10 @@ private:
 	LoopTimer loop_timer{mediator};
 	//! ReplayManager instance
 	ReplayManager replay_manager{mediator};
-
-private:
-	/**
-	 * \brief Collection of System instances
-	 *
-	 * This map holds System instances indexed by the system's class typeid. It is filled in the
-	 * constructor of \c LoopManager using LoopManager::load_system.
-	 */
-	std::unordered_map<std::type_index, std::unique_ptr<System>> systems;
-	/**
-	 * \brief Initialize a system
-	 * \tparam T System type (must be derivative of \c System)
-	 */
-	template <class T>
-	void load_system();
-	/**
-	 * \brief Retrieve a reference to ECS system
-	 * \tparam T System type
-	 * \returns Reference to system instance
-	 * \throws std::runtime_error if the System is not initialized
-	 */
-	template <class T>
-	T & get_system();
+	//! SystemManager
+	SystemManager system_manager{mediator};
 };
 
 } // namespace crepe
 
-#include "LoopManager.hpp"
+#include "Engine.hpp"
diff --git a/src/crepe/api/Engine.hpp b/src/crepe/api/Engine.hpp
new file mode 100644
index 0000000..f2fdc0a
--- /dev/null
+++ b/src/crepe/api/Engine.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "Engine.h"
+
+namespace crepe {
+
+template <class T>
+void Engine::add_scene() {
+	this->scene_manager.add_scene<T>();
+}
+
+} // namespace crepe
diff --git a/src/crepe/api/LoopManager.cpp b/src/crepe/api/LoopManager.cpp
deleted file mode 100644
index 2855455..0000000
--- a/src/crepe/api/LoopManager.cpp
+++ /dev/null
@@ -1,75 +0,0 @@
-#include "../system/AISystem.h"
-#include "../system/AnimatorSystem.h"
-#include "../system/AudioSystem.h"
-#include "../system/CollisionSystem.h"
-#include "../system/InputSystem.h"
-#include "../system/ParticleSystem.h"
-#include "../system/PhysicsSystem.h"
-#include "../system/RenderSystem.h"
-#include "../system/ScriptSystem.h"
-#include "../system/EventSystem.h"
-
-#include "LoopManager.h"
-
-using namespace crepe;
-using namespace std;
-
-LoopManager::LoopManager() {
-	this->load_system<ScriptSystem>();
-	this->load_system<AISystem>();
-	this->load_system<PhysicsSystem>();
-	this->load_system<CollisionSystem>();
-	this->load_system<AnimatorSystem>();
-	this->load_system<ParticleSystem>();
-	this->load_system<RenderSystem>();
-	this->load_system<InputSystem>();
-	this->load_system<EventSystem>();
-	this->load_system<AudioSystem>();
-
-	this->mediator.loop_manager = *this;
-}
-
-void LoopManager::start() {
-	this->setup();
-	this->loop();
-}
-
-void LoopManager::fixed_update() {
-	for (auto & [type, system] : this->systems) {
-		if (!system->active) continue;
-		system->fixed_update();
-	}
-}
-
-void LoopManager::frame_update() {
-	for (auto & [type, system] : this->systems) {
-		if (!system->active) continue;
-		system->frame_update();
-	}
-}
-
-void LoopManager::setup() {
-	LoopTimer & timer = this->loop_timer;
-	this->game_running = true;
-	this->scene_manager.load_next_scene();
-	timer.start();
-	timer.set_fps(200);
-}
-
-void LoopManager::loop() {
-	LoopTimer & timer = this->loop_timer;
-	timer.start();
-
-	while (game_running) {
-		timer.update();
-
-		while (timer.get_lag() >= timer.get_fixed_delta_time()) {
-			this->fixed_update();
-			timer.advance_fixed_update();
-		}
-
-		this->frame_update();
-		timer.enforce_frame_rate();
-	}
-}
-
diff --git a/src/crepe/api/LoopManager.hpp b/src/crepe/api/LoopManager.hpp
deleted file mode 100644
index 627b281..0000000
--- a/src/crepe/api/LoopManager.hpp
+++ /dev/null
@@ -1,46 +0,0 @@
-#pragma once
-
-#include <memory>
-#include <cassert>
-#include <format>
-
-#include "../system/System.h"
-#include "LoopManager.h"
-
-namespace crepe {
-
-template <class T>
-void LoopManager::add_scene() {
-	this->scene_manager.add_scene<T>();
-}
-
-template <class T>
-T & LoopManager::get_system() {
-	using namespace std;
-	static_assert(is_base_of<System, T>::value, "get_system must recieve a derivative class of System");
-
-	const type_info & type = typeid(T);
-	if (!this->systems.contains(type))
-		throw runtime_error(format("LoopManager: {} is not initialized", type.name()));
-
-	System * system = this->systems.at(type).get();
-	T * concrete_system = dynamic_cast<T *>(system);
-	assert(concrete_system != nullptr);
-
-	return *concrete_system;
-}
-
-template <class T>
-void LoopManager::load_system() {
-	using namespace std;
-	static_assert(is_base_of<System, T>::value,
-			"load_system must recieve a derivative class of System");
-
-	const type_info & type = typeid(T);
-	if (this->systems.contains(type))
-		throw runtime_error(format("LoopManager: {} is already initialized", type.name()));
-	System * system = new T(this->mediator);
-	this->systems[type] = unique_ptr<System>(system);
-}
-
-} // namespace crepe
diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h
index 0a73a4c..fb52a10 100644
--- a/src/crepe/api/LoopTimer.h
+++ b/src/crepe/api/LoopTimer.h
@@ -54,7 +54,7 @@ public:
 	void set_game_scale(double game_scale);
 
 private:
-	friend class LoopManager;
+	friend class Engine;
 
 	/**
 	 * \brief Start the loop timer.