Merge branch 'interactions-v2' into dev

extern/SDL

@@ -1 +1 @@
-Subproject commit e027b85cc457556071cbb2f3f1bcf8803c1bc001
+Subproject commit f6864924f76e1a0b4abaefc76ae2ed22b1a8916e

include/Entity.h

@@ -35,85 +35,90 @@ class Entity
 {
 public:
 
-	/*! 
+    /*!
-	 * \brief Used for rendering order (last is highest) or retrieving entities of group
+     * \brief Used for rendering order (last is highest) or retrieving entities of group
-	 * \todo Label used in singular entity shouldn't use plural
+     * \todo Label used in singular entity shouldn't use plural
-	 * \todo HEARTS are rendered above POWERUPS, missleading order
+     * \todo HEARTS are rendered above POWERUPS, missleading order
-	 * \todo PROJECTILE are rendered above POWERUPS, missleading order
+     * \todo PROJECTILE are rendered above POWERUPS, missleading order
-	 * \todo Generalize HEARTS as UI or similar
+     * \todo Generalize HEARTS as UI or similar
-	 */
+     */
-	enum class GroupLabel
+    enum class GroupLabel
-	{
+    {
-		MAPTILES, //!< Entity using TileComponent
+        MAPTILES, //!< Entity using TileComponent
-		PLAYERS, //!< Primary entity in player controll
+        PLAYERS, //!< Primary entity in player controll
-		ENEMIES, //!< \deprecated All players now grouped as Entity::PLAYERS
+        ENEMIES, //!< \deprecated All players now grouped as Entity::PLAYERS
-		COLLIDERS, //!< Fixed collider entity, e.g. a wall
+        COLLIDERS, //!< Fixed collider entity, e.g. a wall
-	    PROJECTILE, //!< \todo Document
+        PROJECTILE, //!< \todo Document
-	    HEARTS, //!< \todo Document
+        HEARTS, //!< \todo Document
-	    POWERUPS //!< \todo Document
+        POWERUPS //!< \todo Document
-	};
+    };
 
-	/*!
+    /*!
-	 * \todo Document
+     * \todo Document
-	 */
+     */
-	explicit Entity(Manager& mManager) :
+    explicit Entity(Manager& mManager) :
-		manager(mManager) { };
+        manager(mManager) { };
 
-	void update(uint_fast16_t diffTime) const; //!< Call each frame to update all components
+    void update(uint_fast16_t diffTime) const; //!< Call each frame to update all components
 
-	bool isActive() const { return this->active; } //!< \sa destroy()
+    bool isActive() const { return this->active; } //!< \sa destroy()
-	//! Mark for destruction for Manager::refresh() and disables collision
+    //! Mark for destruction for Manager::refresh() and disables collision
-	//! \sa ColliderComponent
+    //! \sa ColliderComponent
-	void destroy() {
+    void destroy() {
-		this->active = false;
+        this->active = false;
-		if (this->hasComponent<ColliderComponent>()) {
+        if (this->hasComponent<ColliderComponent>()) {
-			this->getComponent<ColliderComponent>().removeCollision();
+            this->getComponent<ColliderComponent>().removeCollision();
-		}
+        }
-	}
+    }
 
-	bool hasGroup(Group mGroup); //!< \sa GroupLabel
+    bool hasGroup(Group mGroup); //!< \sa GroupLabel
-	void addGroup(Group mGroup); //!< \sa GroupLabel
+    void addGroup(Group mGroup); //!< \sa GroupLabel
-	void delGroup(Group mGroup); //!< \sa GroupLabel
+    void delGroup(Group mGroup); //!< \sa GroupLabel
-	//! \returns bitset with true on position GroupLabel if the entity belongs to group
+    //! \returns bitset with true on position GroupLabel if the entity belongs to group
-	//! \sa GroupLabel
+    //! \sa GroupLabel
-	std::bitset<MAX_GROUPS> getGroupBitSet();
+    std::bitset<MAX_GROUPS> getGroupBitSet();
 
- 	//! \sa Manager
+    //! \sa Manager
-	Manager& getManager() { return manager; };
+    Manager& getManager() { return manager; };
 
-	template <typename T> bool hasComponent() const //! \sa Component
+    template <typename T> bool hasComponent() const //! \sa Component
-	{
+    {
-		return componentBitSet[getComponentTypeID<T>()];
+        return componentBitSet[getComponentTypeID<T>()];
-	}
+    }
 
-	//! \brief Adds specified type as component and calls Component::init() 
+    //! \brief Adds specified type as component and calls Component::init()
-	//! \param mArgs Constructor arguments of component
+    //! \param mArgs Constructor arguments of component
-	template <typename T, typename...TArgs> T& addComponent(TArgs&&...mArgs)
+    template <typename T, typename...TArgs> T& addComponent(TArgs&&...mArgs)
-	{
+    {
-		T* c(new T(std::forward<TArgs>(mArgs)...));
+        T* c(new T(std::forward<TArgs>(mArgs)...));
-		c->entity = this;
+        c->entity = this;
-		std::unique_ptr<Component> uPtr{ c };
+        std::shared_ptr<Component> uPtr{ c };
-		this->components.emplace_back(std::move(uPtr));
+        this->components.at(getComponentTypeID<T>()) = std::move(uPtr);
 
-		componentArray[getComponentTypeID<T>()] = c;
+        componentArray[getComponentTypeID<T>()] = c;
-		componentBitSet[getComponentTypeID<T>()] = true;
+        componentBitSet[getComponentTypeID<T>()] = true;
 
-		c->init();
+        c->init();
-		return *c;
+        return *c;
-	};
+    };
-	
+
-	template <typename T> T& getComponent() const //!< \todo: rewrite to use optionals
+    template <typename T> T& getComponent() const //!< \todo: rewrite to use optionals
-	{
+    {
-		auto ptr(componentArray[getComponentTypeID<T>()]);
+        auto ptr(componentArray[getComponentTypeID<T>()]);
-		return *static_cast<T*>(ptr);
+        return *static_cast<T*>(ptr);
-	}
+    }
+
+    template <typename T> std::shared_ptr<T> getComponentAsPointer() const
+    {
+        return std::static_pointer_cast<T>(components.at(getComponentTypeID<T>()));
+    }
 
 private:
-	Manager& manager;
+    Manager& manager;
-	bool active = true;
+    bool active = true;
-	std::vector<std::unique_ptr<Component>> components;
+    std::array<std::shared_ptr<Component>, MAX_COMPONENTS> components;
 
-	ComponentArray componentArray = {};
+    ComponentArray componentArray = {};
-	ComponentBitSet componentBitSet;
+    ComponentBitSet componentBitSet;
-	GroupBitSet groupBitSet;
+    GroupBitSet groupBitSet;
 };

include/EventManager.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <functional>
+#include <initializer_list>
+#include <map>
+#include <vector>
+
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_init.h"
+
+typedef std::function<SDL_AppResult(SDL_EventType, SDL_Event* const)> EventListener;
+
+class EventManager {
+public:
+    EventManager();
+
+    void registerListener(EventListener listener, std::initializer_list<Uint32> eventTypes);
+    SDL_AppResult handleEvent(SDL_Event* const event);
+private:
+    std::map<Uint32, std::vector<EventListener>> eventListeners = std::map<Uint32, std::vector<EventListener>>();
+};

include/GameInternal.h

@@ -7,9 +7,14 @@
 #include <functional>
 #include <vector>
 
+#include "EventManager.h"
+#include "InteractionManager.h"
 #include "Manager.h"
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_init.h"
 #include "Vector2D.h"
 #include "Entity.h"
+#include "InputManager.h"
 #include "RenderManager.h"
 #include "ConfigLoader.h"
 #include "PickupManager.h"
@@ -25,18 +30,18 @@ class Game;
 class GameInternal
 {
 public:
-	GameInternal();
+    GameInternal();
-	~GameInternal();
+    ~GameInternal();
 
-	SDL_AppResult init();
+    SDL_AppResult init();
 
-	void handleEvents();
+    SDL_AppResult handleEvent(SDL_Event* event);
-	void update(Uint64 frameTime);
+    void update(Uint64 frameTime);
-	void render();
+    void render();
-	void clean();
+    void clean();
-	bool isRunning() const;
+    bool isRunning() const;
-	void setRunning(bool running); // TODO: should be private/not accesible for game dev
+    void setRunning(bool running); // TODO: should be private/not accesible for game dev
-	void stopGame();
+    void stopGame();
 
 	/* static */ SDL_Renderer* renderer = nullptr;
 	/* static */ SDL_Event event;
@@ -44,29 +49,32 @@ public:
 	/* static */ PickupManager* pickupManager;
     /* static */ TextureManager* textureManager;
     /* static */ SoundManager* soundManager;
+    /* static */ InputManager* inputManager;
+    RenderManager* renderManager;
+    EventManager* eventManager;
+    InteractionManager* interactionManager;
 
     Manager manager;
-    RenderManager renderManager;
     Map* map; // game specific, might not be needed for all types of games
 
-	ConfigLoader* config;
+    ConfigLoader* config;
 
-	std::vector<Entity*>& tiles;
+    std::vector<Entity*>& tiles;
-	std::vector<Entity*>& players;
+    std::vector<Entity*>& players;
-	std::vector<Entity*>& projectiles;
+    std::vector<Entity*>& projectiles;
-	std::vector<Entity*>& hearts;
+    std::vector<Entity*>& hearts;
-	std::vector<Entity*>& powerups;
+    std::vector<Entity*>& powerups;
-	// end moved globals
+    // end moved globals
 
     void refreshPlayers();
 
 private:
 
-	Game* gameInstance;
+    Game* gameInstance;
 
-	int counter = 0;
+    int counter = 0;
-	bool running = true;
+    bool running = true;
-	SDL_Window* window;
+    SDL_Window* window;
 
-	Uint64 lastFrameTime = 0;
+    Uint64 lastFrameTime = 0;
 };

include/InputManager.h

@@ -0,0 +1,139 @@
+#pragma once
+
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_init.h>
+#include <SDL3/SDL.h>
+#include <map>
+#include <string>
+#include <functional>
+#include <vector>
+#include <iostream>
+
+class InputManager {
+public:
+    enum class EventType {
+        KeyDown,
+        KeyUp
+    };
+
+    enum class Key
+    {
+        UP,
+        DOWN,
+        LEFT,
+        RIGHT,
+        SPACE,
+        ENTER,
+        ESCAPE,
+        TAB,
+        BACKSPACE,
+        DELETE,
+        HOME,
+        END,
+        PAGE_UP,
+        PAGE_DOWN,
+        INSERT,
+        CAPS_LOCK,
+        LEFT_SHIFT,
+        RIGHT_SHIFT,
+        LEFT_CTRL,
+        RIGHT_CTRL,
+        LEFT_ALT,
+        RIGHT_ALT,
+        F1,
+        F2,
+        F3,
+        F4,
+        F5,
+        F6,
+        F7,
+        F8,
+        F9,
+        F10,
+        F11,
+        F12,
+        A,
+        B,
+        C,
+        D,
+        E,
+        F,
+        G,
+        H,
+        I,
+        J,
+        K,
+        L,
+        M,
+        N,
+        O,
+        P,
+        Q,
+        R,
+        S,
+        T,
+        U,
+        V,
+        W,
+        X,
+        Y,
+        Z,
+        NUM_0,
+        NUM_1,
+        NUM_2,
+        NUM_3,
+        NUM_4,
+        NUM_5,
+        NUM_6,
+        NUM_7,
+        NUM_8,
+        NUM_9,
+        LEFT_BRACKET,
+        RIGHT_BRACKET,
+        SEMICOLON,
+        APOSTROPHE,
+        COMMA,
+        PERIOD,
+        SLASH,
+        BACKSLASH,
+        GRAVE
+    };
+
+    struct InputAction {
+        std::string name;
+        std::vector<Key> bindings;
+        std::function<void(bool)> callback;
+    };
+
+    InputManager();
+    ~InputManager();
+
+    void init(); // see if necessary
+    void processEvents();
+    void registerAction(const std::string& actionName, const std::vector<Key>& keys, std::function<void(bool)> callback, const std::string& context);
+
+    void setActiveContext(const std::string& context);
+    std::string getActiveContext() const;
+
+    //void rebindAction(const std::string& actionName, const std::vector<Key>& newBindings, const std::string& context);
+    //void removeBindings(const std::string& actionName, const std::string& context);
+    //std::vector<Key> getBindings(const std::string& actionName, const std::string& context) const;
+    std::vector<InputAction*> getActionsByKey(const Key key) const;
+
+    SDL_AppResult handleEvent(SDL_EventType type, SDL_Event* const event);
+
+    void initKeyMap();
+private:
+    // TODO: flesh this out to avoid loops in process actions
+    // additionally to actionsByContext, not instead
+    std::map<std::string, std::map<Key, std::vector<InputAction*>>> actionsByContextAndKey;
+
+    std::map<Key, SDL_Scancode> keyMap;
+    std::string activeContext;
+};
+
+std::ostream& operator<<(std::ostream& os, InputManager::Key key);
+std::ostream& operator<<(std::ostream& os, const InputManager::InputAction& action);
+std::ostream& operator<<(std::ostream& os, const InputManager::InputAction* action);
+std::ostream& operator<<(std::ostream& os, const std::vector<InputManager::InputAction>& actions);
+std::ostream& operator<<(std::ostream& os, const std::vector<InputManager::InputAction*>& actions);

include/InteractionComponent.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "Component.h"
+#include "InteractionListener.h"
+
+#include <functional>
+
+class InteractionComponent : public Component, public InteractionListener
+{
+public:
+    /**
+     * @brief Constructor for the InteractionComponent.
+     * @param callback A function to be called when an interaction event is triggered. void* actor, void* data are passed to the callback function from InteractionEventdataStruct.
+     */
+    InteractionComponent(std::function<void(void*,void*)> callback);
+
+    /**
+     * @brief Internal function to be called when an interaction event is triggered.
+     */
+    void interact(void* actor, void* data) override;
+
+    /**
+     * @brief Internal function to use as reference for targeting.
+     */
+    std::shared_ptr<Vector2D> getPosition() override;
+private:
+    std::function<void(void*,void*)> interactionCallback;
+};

include/InteractionEventdataStruct.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "Entity.h"
+#include "InteractionListener.h"
+#include "InteractionManager.h"
+#include "Vector2D.h"
+#include <cstdint>
+#include <memory>
+
+/**
+ * @brief Struct to hold data for interaction events.
+ * This struct is used to pass data to the interaction manager when an interaction event is triggered.
+ */
+struct InteractionEventdataStruct {
+    /// Arbitray data to pass to the interaction listener. Can for example be an Entity ptr to represent the actor.
+    void* actor;
+    /// The data to pass to the interaction listener. Can be any type of pointer.
+    void* data;
+    /// The target of the interaction, e.g. InteractionComponent of an Entity. Is required if strategy is set to 0 (none)
+    std::weak_ptr<InteractionListener> target = std::weak_ptr<InteractionListener>();
+    /// Coordinates from which to base targeting on. Is required if strategy is not set to 0 (none)
+    std::shared_ptr<Vector2D> targetingReference = nullptr;
+    /// required without explicit target, defaults to none
+    /// @sa InteractionManager::TargetingStrategy
+    uint8_t strategy = 0; // int since enum would be impossibling user defined targetingStrategies
+
+    void triggerEvent();
+};

include/InteractionListener.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "Vector2D.h"
+#include <memory>
+
+class InteractionListener {
+public:
+    InteractionListener() { };
+    virtual ~InteractionListener() { };
+
+    virtual void interact(void* actor, void* data) = 0;
+    virtual std::shared_ptr<Vector2D> getPosition() // required for targeting strategy, return null to only allow explicit targeting
+    {
+        return nullptr;
+    }
+
+};

include/InteractionManager.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "InteractionListener.h"
+
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_init.h"
+#include <cstdint>
+#include <functional>
+#include <memory>
+#include <vector>
+#include <ranges>
+
+// TODO: ranges concept to avoid to<vector> in cpp
+typedef std::function<std::shared_ptr<InteractionListener>(Vector2D*, std::vector<std::shared_ptr<InteractionListener>>)> TargetingFunc;
+
+class InteractionManager {
+public:
+    InteractionManager();
+    InteractionManager (const InteractionManager&) = delete;
+    InteractionManager& operator= (const InteractionManager&) = delete;
+
+    enum class TargetingStrategy : uint8_t {
+        none = 0,
+        closest,
+        manhattenDistance
+    };
+
+    SDL_AppResult handleInteract(SDL_EventType type, SDL_Event* const event);
+    void registerListener(std::weak_ptr<InteractionListener> listener);
+    uint8_t registerTargetingFunc(TargetingFunc func);
+private:
+
+    std::vector<std::weak_ptr<InteractionListener>> listeners;
+    std::array<TargetingFunc, 256> targetingFuncs;
+};

include/PickupComponent.h

@@ -13,8 +13,8 @@ public:
 	PickupComponent(std::function<void (Entity*)> func);
 	~PickupComponent() {};
 
-	void update(uint_fast16_t diffTime) override;
+    void update(uint_fast16_t diffTime) override;
 
 private:
-	std::function<void (Entity*)> pickupFunc;
+    std::function<void (Entity*)> pickupFunc;
 };

include/RenderObject.h

@@ -7,7 +7,7 @@ class RenderObject
 public:
 	virtual void draw() = 0;
 
-	RenderObject(int zIndex, RenderManager& renderManager);
+	RenderObject(int zIndex, RenderManager* renderManager);
 	~RenderObject();
 
 	int getZIndex() { return this->zIndex; };
@@ -23,5 +23,5 @@ private:
 	int zIndex = 0;
 
 protected:
-	RenderManager& renderManager;
+	RenderManager* renderManager;
 };

include/SpriteComponent.h

@@ -40,6 +40,11 @@ private:
 	const char* path; //!< empty string if texture has a texture enum value, otherwise the path of the texture
 
 public:
+    //debug
+    Textures getTexture() { return this->textureEnum; }
+
+
+
 	SpriteComponent(Textures texture, int zIndex);
 	SpriteComponent(Textures texture, int xOffset, int yOffset, int zIndex);
 	SpriteComponent(const char* path, int xOffset, int yOffset, int zIndex);

include/TextureManager.h

@@ -83,9 +83,15 @@ class TextureManager
 		 */
 		SDL_Texture* loadMapTileTexture(const char* path);
 
+        std::string getTexturePath(Textures texture) {
+            return this->texture_references.at(texture);
+        }
+
 	private:
 		SDL_ScaleMode scaleMode = SDL_SCALEMODE_NEAREST;
 		Manager* manager;
 		std::map<Textures, SDL_Texture*> texture_cache;
 		std::map<std::string, SDL_Texture*> mapTile_texture_cache;
+
+        std::map<Textures, std::string> texture_references;
 };

include/VEGO_Event.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <SDL3/SDL_stdinc.h>
+
+namespace vego {
+    extern Uint32 VEGO_Event_Interaction;
+}

src/Entity.cpp

@@ -6,7 +6,9 @@
 
 void Entity::update(uint_fast16_t diffTime) const
 {
-	for (auto const& c : components) c->update(diffTime);
+	for (auto const& c : components)
+        if (c)
+            c->update(diffTime);
 }
 
 bool Entity::hasGroup(Group mGroup)

src/EventManager.cpp

@@ -0,0 +1,44 @@
+#include "EventManager.h"
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_init.h"
+#include "SDL3/SDL_stdinc.h"
+#include "VEGO_Event.h"
+#include <algorithm>
+#include <functional>
+#include <ranges>
+#include <vector>
+
+Uint32 vego::VEGO_Event_Interaction;
+
+EventManager::EventManager()
+{
+    /// \TODO: from c++26 you (should be able to) can get the amount of name values in an enum
+    vego::VEGO_Event_Interaction = SDL_RegisterEvents(1); // TODO: error handling
+}
+
+
+void EventManager::registerListener(EventListener listener, std::initializer_list<Uint32> eventTypes)
+{
+    std::ranges::for_each(eventTypes.begin(), eventTypes.end(), [this, &listener](const Uint32& eventType) {
+        if (!this->eventListeners.contains(eventType)) {
+            this->eventListeners.insert({eventType, std::vector<EventListener>()});
+        }
+        this->eventListeners.at(eventType).emplace_back(listener);
+    });
+}
+
+SDL_AppResult EventManager::handleEvent(SDL_Event* event)
+{
+    SDL_EventType type = (SDL_EventType) event->type;
+    if (this->eventListeners.contains(type)) {
+        std::vector<SDL_AppResult> results;
+        for (auto& listener : this->eventListeners.at(type)) {
+            results.emplace_back(listener((SDL_EventType) event->type, event));
+        }
+        if (std::ranges::contains(results, SDL_APP_FAILURE))
+            return SDL_APP_FAILURE;
+        if (std::ranges::contains(results, SDL_APP_SUCCESS))
+            return SDL_APP_SUCCESS;
+    }
+    return SDL_APP_CONTINUE;
+}

src/GameInternal.cpp

@@ -1,9 +1,14 @@
 #include "GameInternal.h"
 
 #include "CollisionHandler.h"
+#include "EventManager.h"
+#include "InputManager.h"
+#include "InteractionManager.h"
 #include "RenderManager.h"
 #include <SDL3_mixer/SDL_mixer.h>
+#include "SDL3/SDL_events.h"
 #include "SDL3/SDL_init.h"
+#include "SDL3/SDL_oldnames.h"
 #include "SoundManager.h"
 #include "Entity.h"
 #include "HealthComponent.h"
@@ -13,158 +18,165 @@
 #include "GameFactory.h"
 
 #include <VEGO.h>
+#include <VEGO_Event.h>
+#include <functional>
 
 #include "ConfigLoader.h"
 
 GameInternal::GameInternal() :
-	manager(this),
+    manager(this),
-	renderManager(),
+    tiles(manager.getGroup((size_t)Entity::GroupLabel::MAPTILES)),
-	tiles(manager.getGroup((size_t)Entity::GroupLabel::MAPTILES)),
+    players(manager.getGroup((size_t)Entity::GroupLabel::PLAYERS)),
-	players(manager.getGroup((size_t)Entity::GroupLabel::PLAYERS)),
+    projectiles(manager.getGroup((size_t)Entity::GroupLabel::PROJECTILE)),
-	projectiles(manager.getGroup((size_t)Entity::GroupLabel::PROJECTILE)),
+    hearts(manager.getGroup((size_t)Entity::GroupLabel::HEARTS)),
-	hearts(manager.getGroup((size_t)Entity::GroupLabel::HEARTS)),
+    powerups(manager.getGroup((size_t)Entity::GroupLabel::POWERUPS))
-	powerups(manager.getGroup((size_t)Entity::GroupLabel::POWERUPS))
 {};
 
 GameInternal::~GameInternal() = default;
 
 SDL_AppResult GameInternal::init()
 {
-	config = new ConfigLoader();
+    config = new ConfigLoader();
 
-	this->gameInstance = GameFactory::instance().create(this);
+    this->gameInstance = GameFactory::instance().create(this);
-	config->setCustomConfig(this->gameInstance->setConfigFilePath());
+    config->setCustomConfig(this->gameInstance->setConfigFilePath());
-	config->init();
+    config->init();
-
-	json finalConfig = config->getFinalConfig();
 
+    json finalConfig = config->getFinalConfig();
+    
 	GameInternal::pickupManager = new PickupManager(&manager);
-	GameInternal::textureManager = new TextureManager(&manager);
+    GameInternal::textureManager = new TextureManager(&manager);
-	GameInternal::soundManager = new SoundManager();
+    GameInternal::soundManager = new SoundManager();
-	GameInternal::collisionHandler = new CollisionHandler(manager); //why no pointer?
+    GameInternal::collisionHandler = new CollisionHandler(manager); // why does this use a referrence, but AssetManager a pointer?
-	
+    GameInternal::inputManager = new InputManager();
-	int flags = 0;
+    GameInternal::inputManager->initKeyMap();
-	if (finalConfig.at("fullscreen"))
-	{
-		flags = SDL_WINDOW_FULLSCREEN;
-	}
 
-	if (!SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO))
+    GameInternal::renderManager = new RenderManager();
-	{
+    GameInternal::eventManager = new EventManager();
-		std::cout << "ERROR. Subsystem couldnt be initialized! " << SDL_GetError() << std::endl;
+    GameInternal::interactionManager = new InteractionManager();
-		SDL_ClearError();
-		return SDL_APP_FAILURE;
-	}
 
-	if (Mix_Init(MIX_INIT_MP3) != MIX_INIT_MP3) {
+    this->eventManager->registerListener(std::bind_front(&InputManager::handleEvent, this->inputManager), { SDL_EVENT_KEY_DOWN, SDL_EVENT_KEY_UP });
-		std::cout << "ERROR. Subsystem couldnt be initialized!" << std::endl;
+    this->eventManager->registerListener(std::bind_front(&InteractionManager::handleInteract, VEGO_Game().interactionManager), { vego::VEGO_Event_Interaction });
-		return SDL_APP_FAILURE;
-	}
 
-	window = SDL_CreateWindow(finalConfig.at("title").get<std::string>().c_str(),
+    int flags = 0;
-		finalConfig.at("screen_width"), finalConfig.at("screen_height"), flags);
+    if (finalConfig.at("fullscreen"))
+    {
+        flags = SDL_WINDOW_FULLSCREEN;
+    }
 
-	if (!window)
+    if (!SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO))
-	{
+    {
-		std::cout << "ERROR: Window couldnt be created! " << SDL_GetError() << std::endl;
+        std::cout << "ERROR. Subsystem couldnt be initialized! " << SDL_GetError() << std::endl;
-		SDL_ClearError();
+        SDL_ClearError();
-		return SDL_APP_FAILURE;
+        return SDL_APP_FAILURE;
-	}
+    }
+
+    if (Mix_Init(MIX_INIT_MP3) != MIX_INIT_MP3) {
+        std::cout << "ERROR. Subsystem couldnt be initialized!" << std::endl;
+        return SDL_APP_FAILURE;
+    }
+
+    window = SDL_CreateWindow(finalConfig.at("title").get<std::string>().c_str(),
+        finalConfig.at("screen_width"), finalConfig.at("screen_height"), flags);
+
+    if (!window)
+    {
+        std::cout << "ERROR: Window couldnt be created! " << SDL_GetError() << std::endl;
+        SDL_ClearError();
+        return SDL_APP_FAILURE;
+    }
 
     // bad
     SDL_Surface* icon;
     if((icon = SDL_LoadBMP(finalConfig.at("icon").get<std::string>().c_str())))
     {
-    	SDL_SetWindowIcon(window, icon);
+        SDL_SetWindowIcon(window, icon);
     }
 
     SDL_SetWindowIcon(window, icon);
 
-	renderer = SDL_CreateRenderer(window, NULL);
+    renderer = SDL_CreateRenderer(window, NULL);
-	if (!renderer)
+    if (!renderer)
-	{
+    {
-		std::cout << "ERROR: Renderer couldnt be created! " << SDL_GetError() << std::endl;
+        std::cout << "ERROR: Renderer couldnt be created! " << SDL_GetError() << std::endl;
-		SDL_ClearError();
+        SDL_ClearError();
-		return SDL_APP_FAILURE;
+        return SDL_APP_FAILURE;
-	}
+    }
-	SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
 
-	if (!Mix_OpenAudio(0, NULL))
+    if (!Mix_OpenAudio(0, NULL))
-	{
+    {
-		std::cout << "ERROR: Mixer couldnt be initialized! " << SDL_GetError() << std::endl;
+        std::cout << "ERROR: Mixer couldnt be initialized! " << SDL_GetError() << std::endl;
-		SDL_ClearError();
+        SDL_ClearError();
-		return SDL_APP_FAILURE;
+        return SDL_APP_FAILURE;
-	}
+    }
 
-	Mix_Volume(-1, MIX_MAX_VOLUME);
+    Mix_Volume(-1, MIX_MAX_VOLUME);
-	Mix_AllocateChannels(16);
+    Mix_AllocateChannels(16);
 
-	// loading sounds
+    // loading sounds
-	// assets->addSoundEffect("throw_egg", "assets/sound/throw_egg.wav");
+    // assets->addSoundEffect("throw_egg", "assets/sound/throw_egg.wav");
-	// assets->addSoundEffect("steps", "assets/sound/steps.wav");
+    // assets->addSoundEffect("steps", "assets/sound/steps.wav");
 
-	// loading music
+    // loading music
-	// assets->addMusic("background_music", "assets/sound/background_music.mp3");
+    // assets->addMusic("background_music", "assets/sound/background_music.mp3");
 
-	this->gameInstance->init();
+    this->gameInstance->init();
 
-	return SDL_APP_CONTINUE;
+    return SDL_APP_CONTINUE;
 }
 
-void GameInternal::handleEvents()
+SDL_AppResult GameInternal::handleEvent(SDL_Event* event) {
-{
+    SDL_AppResult result = this->eventManager->handleEvent(event);
-	SDL_PollEvent(&event);
 
-	switch (event.type)
+    if (event->type == SDL_EVENT_QUIT) {
-	{
+        this->clean();
-		case SDL_EVENT_QUIT: this->setRunning(false);
+        return result == SDL_APP_FAILURE ? SDL_APP_FAILURE : SDL_APP_SUCCESS;
-			break;
+    }
 
-		default:
+    return result;
-			break;
-	}
 }
 
 void GameInternal::update(Uint64 frameTime)
 {
-	manager.refresh();
+    manager.refresh();
 
-	uint_fast16_t diffTime = frameTime - this->lastFrameTime;
+    uint_fast16_t diffTime = frameTime - this->lastFrameTime;
-	manager.update(diffTime);
+    manager.update(diffTime);
 
-	this->gameInstance->update(diffTime); // TODO: this might have to be split up into two update functions, before and after manager...
+    this->gameInstance->update(diffTime); // TODO: this might have to be split up into two update functions, before and after manager...
 
-	this->lastFrameTime = frameTime;
+    this->lastFrameTime = frameTime;
 }
 
 void GameInternal::render()
 {
-	SDL_RenderClear(renderer);
+    SDL_RenderClear(renderer);
-	this->renderManager.renderAll();
+    this->renderManager->renderAll();
-	SDL_RenderPresent(renderer);
+    SDL_RenderPresent(renderer);
 }
 
 void GameInternal::clean()
 {
-	delete(textureManager);
+    delete(textureManager);
-	SDL_DestroyRenderer(renderer);
+    SDL_DestroyRenderer(renderer);
-	SDL_DestroyWindow(window);
+    SDL_DestroyWindow(window);
-	SDL_Quit();
+    SDL_Quit();
-	std::cout << "Game Cleaned!" << std::endl;
+    std::cout << "Game Cleaned!" << std::endl;
 }
 
 bool GameInternal::isRunning() const
 {
-	return running;
+    return running;
 }
 
 void GameInternal::setRunning(bool running) //TODO: might be depracted
 {
-	this->running = running;
+    this->running = running;
 }
 
 void GameInternal::stopGame()
 {
-	this->running = false;
+    this->running = false;
 }
 

src/InputManager.cpp

@@ -0,0 +1,303 @@
+#include "InputManager.h"
+#include "InteractionEventdataStruct.h"
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_init.h"
+#include <iostream>
+#include "SDL3/SDL_stdinc.h"
+#include "VEGO.h"
+#include "VEGO_Event.h"
+
+std::ostream& operator<<(std::ostream& os, InputManager::Key key) {
+    static const std::unordered_map<InputManager::Key, std::string> keyToString {
+        {InputManager::Key::UP, "UP"},
+        {InputManager::Key::DOWN, "DOWN"},
+        {InputManager::Key::LEFT, "LEFT"},
+        {InputManager::Key::RIGHT, "RIGHT"},
+        {InputManager::Key::SPACE, "SPACE"},
+        {InputManager::Key::ENTER, "ENTER"},
+        {InputManager::Key::ESCAPE, "ESCAPE"},
+        {InputManager::Key::TAB, "TAB"},
+        {InputManager::Key::BACKSPACE, "BACKSPACE"},
+        {InputManager::Key::DELETE, "DELETE"},
+        {InputManager::Key::HOME, "HOME"},
+        {InputManager::Key::END, "END"},
+        {InputManager::Key::PAGE_UP, "PAGE_UP"},
+        {InputManager::Key::PAGE_DOWN, "PAGE_DOWN"},
+        {InputManager::Key::INSERT, "INSERT"},
+        {InputManager::Key::CAPS_LOCK, "CAPS_LOCK"},
+        {InputManager::Key::LEFT_SHIFT, "LEFT_SHIFT"},
+        {InputManager::Key::RIGHT_SHIFT, "RIGHT_SHIFT"},
+        {InputManager::Key::LEFT_CTRL, "LEFT_CTRL"},
+        {InputManager::Key::RIGHT_CTRL, "RIGHT_CTRL"},
+        {InputManager::Key::LEFT_ALT, "LEFT_ALT"},
+        {InputManager::Key::RIGHT_ALT, "RIGHT_ALT"},
+        {InputManager::Key::F1, "F1"},
+        {InputManager::Key::F2, "F2"},
+        {InputManager::Key::F3, "F3"},
+        {InputManager::Key::F4, "F4"},
+        {InputManager::Key::F5, "F5"},
+        {InputManager::Key::F6, "F6"},
+        {InputManager::Key::F7, "F7"},
+        {InputManager::Key::F8, "F8"},
+        {InputManager::Key::F9, "F9"},
+        {InputManager::Key::F10, "F10"},
+        {InputManager::Key::F11, "F11"},
+        {InputManager::Key::F12, "F12"},
+        {InputManager::Key::A, "A"},
+        {InputManager::Key::B, "B"},
+        {InputManager::Key::C, "C"},
+        {InputManager::Key::D, "D"},
+        {InputManager::Key::E, "E"},
+        {InputManager::Key::F, "F"},
+        {InputManager::Key::G, "G"},
+        {InputManager::Key::H, "H"},
+        {InputManager::Key::I, "I"},
+        {InputManager::Key::J, "J"},
+        {InputManager::Key::K, "K"},
+        {InputManager::Key::L, "L"},
+        {InputManager::Key::M, "M"},
+        {InputManager::Key::N, "N"},
+        {InputManager::Key::O, "O"},
+        {InputManager::Key::P, "P"},
+        {InputManager::Key::Q, "Q"},
+        {InputManager::Key::R, "R"},
+        {InputManager::Key::S, "S"},
+        {InputManager::Key::T, "T"},
+        {InputManager::Key::U, "U"},
+        {InputManager::Key::V, "V"},
+        {InputManager::Key::W, "W"},
+        {InputManager::Key::X, "X"},
+        {InputManager::Key::Y, "Y"},
+        {InputManager::Key::Z, "Z"},
+        {InputManager::Key::NUM_0, "NUM_0"},
+        {InputManager::Key::NUM_1, "NUM_1"},
+        {InputManager::Key::NUM_2, "NUM_2"},
+        {InputManager::Key::NUM_3, "NUM_3"},
+        {InputManager::Key::NUM_4, "NUM_4"},
+        {InputManager::Key::NUM_5, "NUM_5"},
+        {InputManager::Key::NUM_6, "NUM_6"},
+        {InputManager::Key::NUM_7, "NUM_7"},
+        {InputManager::Key::NUM_8, "NUM_8"},
+        {InputManager::Key::NUM_9, "NUM_9"},
+        {InputManager::Key::LEFT_BRACKET, "LEFT_BRACKET"},
+        {InputManager::Key::RIGHT_BRACKET, "RIGHT_BRACKET"},
+        {InputManager::Key::SEMICOLON, "SEMICOLON"},
+        {InputManager::Key::APOSTROPHE, "APOSTROPHE"},
+        {InputManager::Key::COMMA, "COMMA"},
+        {InputManager::Key::PERIOD, "PERIOD"},
+        {InputManager::Key::SLASH, "SLASH"},
+        {InputManager::Key::BACKSLASH, "BACKSLASH"},
+        {InputManager::Key::GRAVE, "GRAVE"}
+    };
+
+    auto it = keyToString.find(key);
+    if (it != keyToString.end()) {
+        os << it->second;
+    } else {
+        os << "UNKNOWN_KEY";
+    }
+    return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const InputManager::InputAction& action) {
+    os << action.name << " with binding(s): ";
+    for (auto& binding : action.bindings) {
+        os << binding << ", ";
+    }
+    return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const InputManager::InputAction* action) {
+    if (action) {
+        os << *action;
+    } else {
+        os << "NULL_ACTION";
+    }
+    return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const std::vector<InputManager::InputAction>& actions) {
+    os << "Actions: ";
+    if (actions.empty()) {
+        os << "None";
+    } else {
+        for (size_t i = 0; i < actions.size(); ++i) {
+            os << actions[i];
+            if (i < actions.size() - 1) {
+                os << " | ";
+            }
+        }
+    }
+    return os;
+}
+
+// TODO: find out why it doesnt work??
+std::ostream& operator<<(std::ostream& os, const std::vector<InputManager::InputAction*>& actions) {
+    os << "Actions: ";
+    if (actions.empty()) {
+        os << "None";
+    } else {
+        for (size_t i = 0; i < actions.size(); ++i) {
+            if (actions[i]) {
+                os << *actions[i];
+            } else {
+                os << "NULL_ACTION";
+            }
+            if (i < actions.size() - 1) {
+                os << " | ";
+            }
+        }
+    }
+    return os;
+}
+
+
+
+
+// overloads end --------------------------------------------------------------------------------------
+
+
+
+
+
+InputManager::InputManager() : activeContext("Default") {}
+
+InputManager::~InputManager() {}
+
+void InputManager::initKeyMap() {
+    keyMap = {
+        {Key::UP, SDL_SCANCODE_UP},
+        {Key::DOWN, SDL_SCANCODE_DOWN},
+        {Key::LEFT, SDL_SCANCODE_LEFT},
+        {Key::RIGHT, SDL_SCANCODE_RIGHT},
+        {Key::SPACE, SDL_SCANCODE_SPACE},
+        {Key::ENTER, SDL_SCANCODE_RETURN},
+        {Key::ESCAPE, SDL_SCANCODE_ESCAPE},
+        {Key::TAB, SDL_SCANCODE_TAB},
+        {Key::BACKSPACE, SDL_SCANCODE_BACKSPACE},
+        {Key::DELETE, SDL_SCANCODE_DELETE},
+        {Key::HOME, SDL_SCANCODE_HOME},
+        {Key::END, SDL_SCANCODE_END},
+        {Key::PAGE_UP, SDL_SCANCODE_PAGEUP},
+        {Key::PAGE_DOWN, SDL_SCANCODE_PAGEDOWN},
+        {Key::INSERT, SDL_SCANCODE_INSERT},
+        {Key::CAPS_LOCK, SDL_SCANCODE_CAPSLOCK},
+        {Key::LEFT_SHIFT, SDL_SCANCODE_LSHIFT},
+        {Key::RIGHT_SHIFT, SDL_SCANCODE_RSHIFT},
+        {Key::LEFT_CTRL, SDL_SCANCODE_LCTRL},
+        {Key::RIGHT_CTRL, SDL_SCANCODE_RCTRL},
+        {Key::LEFT_ALT, SDL_SCANCODE_LALT},
+        {Key::RIGHT_ALT, SDL_SCANCODE_RALT},
+        {Key::F1, SDL_SCANCODE_F1},
+        {Key::F2, SDL_SCANCODE_F2},
+        {Key::F3, SDL_SCANCODE_F3},
+        {Key::F4, SDL_SCANCODE_F4},
+        {Key::F5, SDL_SCANCODE_F5},
+        {Key::F6, SDL_SCANCODE_F6},
+        {Key::F7, SDL_SCANCODE_F7},
+        {Key::F8, SDL_SCANCODE_F8},
+        {Key::F9, SDL_SCANCODE_F9},
+        {Key::F10, SDL_SCANCODE_F10},
+        {Key::F11, SDL_SCANCODE_F11},
+        {Key::F12, SDL_SCANCODE_F12},
+        {Key::A, SDL_SCANCODE_A},
+        {Key::B, SDL_SCANCODE_B},
+        {Key::C, SDL_SCANCODE_C},
+        {Key::D, SDL_SCANCODE_D},
+        {Key::E, SDL_SCANCODE_E},
+        {Key::F, SDL_SCANCODE_F},
+        {Key::G, SDL_SCANCODE_G},
+        {Key::H, SDL_SCANCODE_H},
+        {Key::I, SDL_SCANCODE_I},
+        {Key::J, SDL_SCANCODE_J},
+        {Key::K, SDL_SCANCODE_K},
+        {Key::L, SDL_SCANCODE_L},
+        {Key::M, SDL_SCANCODE_M},
+        {Key::N, SDL_SCANCODE_N},
+        {Key::O, SDL_SCANCODE_O},
+        {Key::P, SDL_SCANCODE_P},
+        {Key::Q, SDL_SCANCODE_Q},
+        {Key::R, SDL_SCANCODE_R},
+        {Key::S, SDL_SCANCODE_S},
+        {Key::T, SDL_SCANCODE_T},
+        {Key::U, SDL_SCANCODE_U},
+        {Key::V, SDL_SCANCODE_V},
+        {Key::W, SDL_SCANCODE_W},
+        {Key::X, SDL_SCANCODE_X},
+        {Key::Y, SDL_SCANCODE_Y},
+        {Key::Z, SDL_SCANCODE_Z},
+        {Key::NUM_0, SDL_SCANCODE_0},
+        {Key::NUM_1, SDL_SCANCODE_1},
+        {Key::NUM_2, SDL_SCANCODE_2},
+        {Key::NUM_3, SDL_SCANCODE_3},
+        {Key::NUM_4, SDL_SCANCODE_4},
+        {Key::NUM_5, SDL_SCANCODE_5},
+        {Key::NUM_6, SDL_SCANCODE_6},
+        {Key::NUM_7, SDL_SCANCODE_7},
+        {Key::NUM_8, SDL_SCANCODE_8},
+        {Key::NUM_9, SDL_SCANCODE_9},
+        {Key::LEFT_BRACKET, SDL_SCANCODE_LEFTBRACKET},
+        {Key::RIGHT_BRACKET, SDL_SCANCODE_RIGHTBRACKET},
+        {Key::SEMICOLON, SDL_SCANCODE_SEMICOLON},
+        {Key::APOSTROPHE, SDL_SCANCODE_APOSTROPHE},
+        {Key::COMMA, SDL_SCANCODE_COMMA},
+        {Key::PERIOD, SDL_SCANCODE_PERIOD},
+        {Key::SLASH, SDL_SCANCODE_SLASH},
+        {Key::BACKSLASH, SDL_SCANCODE_BACKSLASH},
+        {Key::GRAVE, SDL_SCANCODE_GRAVE}
+    };
+}
+
+void InputManager::registerAction(const std::string& actionName, const std::vector<Key>& keys, std::function<void(bool)> callback, const std::string& context) {
+    InputAction* storedAction = new InputAction{actionName, keys, callback};
+    for (const auto& key : keys) {
+        actionsByContextAndKey[context][key].emplace_back(storedAction);
+    }
+    std::cout << "Registered action: " << storedAction << " in context: " << context << std::endl;
+}
+
+std::vector<InputManager::InputAction*> InputManager::getActionsByKey(const Key key) const {
+    std::vector<InputAction*> result;
+
+    for (const auto& [context, keyMap] : actionsByContextAndKey) {
+        auto it = keyMap.find(key);
+        if (it != keyMap.end()) {
+            result.insert(result.end(), it->second.begin(), it->second.end());
+        }
+    }
+
+    return result;
+}
+
+void InputManager::setActiveContext(const std::string& context) {
+    activeContext = context;
+    std::cout << "Active context set to: " << activeContext << std::endl;
+}
+
+std::string InputManager::getActiveContext() const {
+    return activeContext;
+}
+
+SDL_AppResult InputManager::handleEvent(SDL_EventType type, SDL_Event* const event) {
+    if (event->key.repeat) {
+        return SDL_APP_CONTINUE;
+    }
+    auto keyIt = std::ranges::find_if(keyMap, [&](const auto& pair)
+    { return pair.second == event->key.scancode; });
+
+    if (keyIt != keyMap.end()) {
+        std::cout << "in != keymap.end" << std::endl;
+
+        Key pressedKey = keyIt->first;
+        auto keyActions = actionsByContextAndKey[activeContext];
+        auto it = keyActions.find(pressedKey);
+        if (it != keyActions.end()) {
+            for (auto& action : it->second) {
+                std::cout << "Action triggered: " << action->name << " in context: " << activeContext << std::endl;
+                action->callback(type == SDL_EVENT_KEY_UP);
+            }
+        }
+    }
+
+    return SDL_APP_CONTINUE;
+}

src/InteractionComponent.cpp

@@ -0,0 +1,22 @@
+#include "InteractionComponent.h"
+
+#include "VEGO.h"
+
+InteractionComponent::InteractionComponent(std::function<void(void*,void*)> callback) : interactionCallback(callback)
+{
+    VEGO_Game().interactionManager->registerListener(this->entity->getComponentAsPointer<InteractionComponent>());
+}
+
+void InteractionComponent::interact(void* actor, void* data)
+{
+    if (interactionCallback) {
+        interactionCallback(actor, data);
+    }
+}
+std::shared_ptr<Vector2D> InteractionComponent::getPosition() // required for targeting strategy, return null to only allow explicit targeting
+{
+    if (entity->hasComponent<TransformComponent>()) {
+        return std::make_shared<Vector2D>(entity->getComponent<TransformComponent>().position);
+    }
+    return nullptr;
+}

src/InteractionEventdataStruct.cpp

@@ -0,0 +1,16 @@
+#include "InteractionEventdataStruct.h"
+
+#include "VEGO.h"
+#include "VEGO_Event.h"
+
+void InteractionEventdataStruct::triggerEvent()
+{
+    // TODO: if target is null && strategy is 0, error
+
+    SDL_Event event;
+    SDL_zero(event);
+    event.type = vego::VEGO_Event_Interaction;
+    event.user.data1 = this;
+
+    SDL_PushEvent(&event);
+}

src/InteractionManager.cpp

@@ -0,0 +1,90 @@
+#include "InteractionManager.h"
+
+#include "InteractionEventdataStruct.h"
+#include "InteractionListener.h"
+#include "SDL3/SDL_init.h"
+#include "VEGO_Event.h"
+#include "Vector2D.h"
+#include <algorithm>
+#include <cmath>
+#include <cstdlib>
+#include <functional>
+#include <iostream>
+#include <iterator>
+#include <memory>
+#include <ranges>
+#include <type_traits>
+#include <vector>
+
+InteractionManager::InteractionManager()
+{
+    this->targetingFuncs.fill(nullptr);
+    this->targetingFuncs.at(static_cast<std::underlying_type<InteractionManager::TargetingStrategy>::type>(InteractionManager::TargetingStrategy::closest)) = [](Vector2D* reference, std::vector<std::shared_ptr<InteractionListener>> input) {
+        return std::shared_ptr<InteractionListener>();
+    };
+    this->targetingFuncs.at(static_cast<std::underlying_type<InteractionManager::TargetingStrategy>::type>(InteractionManager::TargetingStrategy::closest)) = [](Vector2D* reference, std::vector<std::shared_ptr<InteractionListener>> input) {
+        auto min = std::ranges::min_element(input, [&reference](std::shared_ptr<InteractionListener>& a, std::shared_ptr<InteractionListener>& b) {
+            std::shared_ptr<Vector2D> coordA = a->getPosition();
+            std::shared_ptr<Vector2D> coordB = b->getPosition();
+
+            if (coordB == nullptr) return true;
+            if (coordA == nullptr) return false;
+
+            return std::sqrt(std::pow(coordA->x - reference->x, 2) + std::pow(coordA->y - reference->y, 2)) < std::sqrt(std::pow(coordB->x - reference->x, 2) + std::pow(coordB->y - reference->y, 2));
+        });
+        return min == std::ranges::end(input) ? nullptr : *min;
+    };
+    this->targetingFuncs.at(static_cast<std::underlying_type<InteractionManager::TargetingStrategy>::type>(InteractionManager::TargetingStrategy::manhattenDistance)) = [](Vector2D* reference, std::vector<std::shared_ptr<InteractionListener>> input) {
+        auto min = std::ranges::min_element(input, [&reference](std::shared_ptr<InteractionListener>& a, std::shared_ptr<InteractionListener>& b) {
+            std::shared_ptr<Vector2D> coordA = a->getPosition();
+            std::shared_ptr<Vector2D> coordB = b->getPosition();
+
+            if (coordB == nullptr) return true;
+            if (coordA == nullptr) return false;
+
+            return (std::abs(coordA->x - reference->x) + std::abs(coordA->y - reference->y)) < (std::abs(coordB->x - reference->x) + std::abs(coordB->y - reference->y));
+        });
+        return min == std::ranges::end(input) ? nullptr : *min;
+    };
+}
+
+SDL_AppResult InteractionManager::handleInteract(SDL_EventType type, SDL_Event* const event)
+{
+    if (type != vego::VEGO_Event_Interaction) { // error handling
+        return SDL_APP_CONTINUE;
+    }
+
+    InteractionEventdataStruct* data = static_cast<InteractionEventdataStruct*>(event->user.data1);
+
+    std::shared_ptr<InteractionListener> listener = data->target.lock();
+
+    if (data->strategy != static_cast<std::underlying_type<InteractionManager::TargetingStrategy>::type>(InteractionManager::TargetingStrategy::none)) {
+        listener = this->targetingFuncs.at(data->strategy)(
+                data->targetingReference.get(),
+                this->listeners
+                    | std::views::transform(&std::weak_ptr<InteractionListener>::lock)
+                    | std::views::filter(&std::shared_ptr<InteractionListener>::operator bool)
+                    | std::ranges::to<std::vector>()
+            );
+    }
+
+    if (listener) {
+        listener->interact(data->actor, data->data);
+    }
+
+    return SDL_APP_CONTINUE;
+}
+
+void InteractionManager::registerListener(std::weak_ptr<InteractionListener> listener)
+{
+    this->listeners.emplace_back(listener);
+}
+
+uint8_t InteractionManager::registerTargetingFunc(TargetingFunc func)
+{
+    auto it = std::ranges::find_if(this->targetingFuncs, [](const auto& func) {
+        return !func;
+    });
+    (*it) = func;
+    return std::distance(this->targetingFuncs.begin(), it);
+}

src/PickupComponent.cpp

@@ -3,16 +3,20 @@
 #include "CollisionHandler.h"
 #include "Entity.h"
 #include "HealthComponent.h"
+#include "SpriteComponent.h"
 #include "StatEffectsComponent.h"
 #include "Constants.h"
+#include "TextureManager.h"
+#include "TransformComponent.h"
 #include <cstdint>
+#include "VEGO.h"
 
 PickupComponent::PickupComponent(std::function<void (Entity*)> func)
 {
     this->pickupFunc = func;
 }
 
-void  PickupComponent::update(uint_fast16_t diffTime)
+void PickupComponent::update(uint_fast16_t diffTime)
 {
     Entity* player;
     if ((player = this->entity->getManager().getGame()->collisionHandler->getAnyIntersection<Entity*>(

src/RenderObject.cpp

@@ -1,10 +1,10 @@
 #include "RenderObject.h"
 #include "RenderManager.h"
 
-RenderObject::RenderObject(int zIndex, RenderManager& renderManager) : zIndex(zIndex), renderManager(renderManager) {
+RenderObject::RenderObject(int zIndex, RenderManager* renderManager) : zIndex(zIndex), renderManager(renderManager) {
-	renderManager.add(this);
+	renderManager->add(this);
 }
 
 RenderObject::~RenderObject() { 
-	this->renderManager.remove(this);
+	this->renderManager->remove(this);
 }

src/SpriteComponent.cpp

@@ -18,7 +18,7 @@
 SpriteComponent::SpriteComponent(Textures texture, int zIndex) : RenderObject(zIndex, VEGO_Game().renderManager), textureXOffset(0), textureYOffset(0)
 {
 	this->textureEnum = texture;
-	this->path = "";
+    this->path = "";
 }
 
 SpriteComponent::SpriteComponent(Textures texture, int xOffset, int yOffset, int zIndex) : RenderObject(zIndex, VEGO_Game().renderManager), textureXOffset(xOffset), textureYOffset(yOffset)

src/TextureManager.cpp

@@ -15,6 +15,9 @@ void TextureManager::addSingleTexture(Textures texture, const char* filePath) {
 
     SDL_SetTextureScaleMode(sdlTexture, this->scaleMode); // linear scaling results in blurry images
 	this->texture_cache.emplace(texture, sdlTexture);
+    if (filePath != nullptr) {
+        this->texture_references.emplace(texture, std::string(filePath));
+    }
 	std::cout << "Loaded texture at " << filePath << std::endl;
 }
 

src/TransformComponent.cpp

@@ -42,6 +42,9 @@ void TransformComponent::init()
 
 void TransformComponent::update(uint_fast16_t diffTime)
 {
+	direction.x = direction.x > 0 ? 1 : direction.x < 0 ? -1 : 0;
+	direction.y = direction.y > 0 ? 1 : direction.y < 0 ? -1 : 0;
+	
 	float multiplier = direction.x != 0 && direction.y != 0 ? 0.707 : 1; // normalizes vector; only works if directions are in increments of 45°
 	Vector2D positionChange(
 		direction.x * this->getSpeed() * multiplier * diffTime * (1.f/1000),

src/_Init.cpp

@@ -27,7 +27,7 @@ SDL_AppResult SDL_AppIterate(void *appstate) {
         return SDL_APP_SUCCESS;
     }
 
-    vego::game->handleEvents(); // bad
+    //vego::game->handleEvents(); // bad
 
     Uint64 frameStart = SDL_GetTicks();
 
@@ -39,8 +39,9 @@ SDL_AppResult SDL_AppIterate(void *appstate) {
     return SDL_APP_CONTINUE;
 }
 
+// triggers upon every event
 SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
-    return SDL_APP_CONTINUE;
+    return vego::game->handleEvent(event);
 }
 
 void SDL_AppQuit(void *appstate, SDL_AppResult result) {