fixed developer skill issue

.gitmodules

@@ -1,19 +1,15 @@
 [submodule "SDL"]
 	path = extern/SDL
 	url = https://github.com/libsdl-org/SDL.git
-	branch = release-2.28.x
 [submodule "SDL_image"]
 	path = extern/SDL_image
 	url = https://github.com/libsdl-org/SDL_image.git
-	branch = release-2.8.x
 [submodule "extern/SDL_mixer"]
 	path = extern/SDL_mixer
 	url = https://github.com/libsdl-org/SDL_mixer.git
-	branch = release-2.8.x
 [submodule "extern/SDL_ttf"]
 	path = extern/SDL_ttf
 	url = https://github.com/libsdl-org/SDL_ttf.git
-	branch = release-2.22.x
 [submodule "extern/tmxlite"]
 	path = extern/tmxlite
 	url = https://github.com/fallahn/tmxlite.git

CMakeLists.txt

@@ -31,11 +31,10 @@ add_library(${PROJECT_NAME} ${SOURCES})
 target_include_directories(${PROJECT_NAME} PUBLIC ${ENGINE_INCLUDE_DIR})
 
 target_link_libraries(${PROJECT_NAME} PUBLIC # should be private when all SDL functionality has a wrapper
-    SDL2::SDL2main
+    SDL3::SDL3-static
-    SDL2::SDL2-static
+    SDL3_image::SDL3_image-static
-    SDL2_image::SDL2_image-static
+    SDL3_mixer::SDL3_mixer-static
-    SDL2_mixer::SDL2_mixer-static
+    SDL3_ttf::SDL3_ttf-static
-    SDL2_ttf::SDL2_ttf-static
     tmxlite
 )
 

engine.sublime-project

@@ -2,12 +2,12 @@
     "folders":
     [
         {
-            "path": "."
+            "path": ".",
         }
-    ],
+	],
     "settings":
     {
-        "tab_size": 4
+        "tab_size": 4,
     },
 	"build_systems": [
 		{
@@ -23,7 +23,7 @@
 					"name": "Release",
 					"shell_cmd": "cmake -DCMAKE_BUILD_TYPE=Release build && cmake --build build",
 				},
-			]
+			],
 		},
 		{
 			"name": "Generate CMake",
@@ -43,7 +43,10 @@
 					"name": "Generate documentation",
 					"shell_cmd": "docker run --rm -v \"$project_path:/source\" -v \"$project_path/docs:/output\" -v \"$project_path/docs/Doxyfile:/Doxyfile\" vego_engine-docker",
 				},
-			]
+			],
 		}
-	]
+	],
+	"debugger_configurations":
+	[
+	],
 }

extern/SDL

@@ -1 +1 @@
-Subproject commit 05eb08053d48fea9052ad02b3d619244aeb868d3
+Subproject commit e027b85cc457556071cbb2f3f1bcf8803c1bc001

extern/SDL_image

@@ -1 +1 @@
-Subproject commit abcf63aa71b4e3ac32120fa9870a6500ddcdcc89
+Subproject commit b1c8ec7d75e3d8398940c9e04a8b82886ae6163d

extern/SDL_mixer

@@ -1 +1 @@
-Subproject commit 5bcd40ad962dc72a3c051084ce128d78f7656566
+Subproject commit 5e2a70519294bc6ec44f1870b019ecd4760fde7d

extern/SDL_ttf

@@ -1 +1 @@
-Subproject commit 4a318f8dfaa1bb6f10e0c5e54052e25d3c7f3440
+Subproject commit 4a8bda9197cc4d6fafd188bc9df6c7e8749a43a2

include/AssetManager.h

@@ -1,6 +1,6 @@
 #pragma once
-#include <SDL_render.h>
+#include <SDL3/SDL_render.h>
-#include <SDL_mixer.h>
+#include <SDL3_mixer/SDL_mixer.h>
 #include <map>
 #include <string>
 #include <functional>
@@ -24,7 +24,7 @@ public:
     AssetManager(Manager* manager);
     ~AssetManager();
 
-    void createProjectile(Vector2D pos, Vector2D velocity, int scale, int range, int speed, const char* texturePath, Entity* owner);
+    void createProjectile(Vector2D pos, Vector2D velocity, int scale, int range, float speed, const char* texturePath, Entity* owner);
     void createPowerup(Vector2D pos, std::function<void (Entity*)> pickupFunc, std::string texturePath);
 
     Vector2D calculateSpawnPosition();

include/ColliderComponent.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <SDL.h>
+#include <SDL3/SDL.h>
 
 #include "Component.h"
 #include "Vector2D.h"
@@ -22,7 +22,7 @@ public:
 	ColliderComponent(const char* tag, float hitboxScale);
 
 	void init() override;
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
     void removeCollision();
 
 	void handleCollision(Vector2D& characterPos, SDL_Rect& characterCollider, SDL_Rect& componentCollider);

include/CollisionHandler.h

@@ -7,7 +7,7 @@
 #include "ColliderComponent.h"
 #include "Constants.h"
 #include "Entity.h"
-#include "SDL_rect.h"
+#include <SDL3/SDL_rect.h>
 #include "SpriteComponent.h"
 #include "Vector2D.h"
 #include "Manager.h"

include/Component.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdint.h>
 class Entity;
 
 class Component
@@ -8,7 +9,7 @@ public:
 	Entity* entity;
 
 	virtual void init() {}
-	virtual void update() {}
+	virtual void update(uint_fast16_t diffTime) {}
 
 	virtual ~Component() = default;
 };

include/Entity.h

@@ -59,7 +59,7 @@ public:
 	explicit Entity(Manager& mManager) :
 		manager(mManager) { };
 
-	void update() 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()
 	//! Mark for destruction for Manager::refresh() and disables collision

include/Game.h

@@ -8,7 +8,7 @@ public:
     virtual ~Game() {}
 
     virtual void init() = 0;
-    virtual void update() = 0;
+    virtual void update(uint_fast16_t diffTime) = 0;
 
     GameInternal* gameInternal; //!< \deprecated  
 };

include/GameInternal.h

@@ -1,8 +1,9 @@
 #pragma once
 
-#include <SDL.h>
+#include <SDL3/SDL.h>
-#include <SDL_image.h>
+#include <SDL3_image/SDL_image.h>
-#include <SDL_mixer.h>
+#include <SDL3_mixer/SDL_mixer.h>
+#include <cstdint>
 #include <functional>
 #include <vector>
 
@@ -26,10 +27,10 @@ public:
 	GameInternal();
 	~GameInternal();
 
-	void init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen);
+	SDL_AppResult init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen);
 
 	void handleEvents();
-	void update();
+	void update(Uint64 frameTime);
 	void render();
 	void clean();
 	bool isRunning() const;
@@ -63,4 +64,6 @@ private:
 	int counter = 0;
 	bool running = true;
 	SDL_Window* window;
+
+	Uint64 lastFrameTime = 0;
 };

include/InputComponent.h

@@ -1,5 +1,5 @@
 #pragma once
-#include <SDL.h>
+#include <SDL3/SDL.h>
 #include <map>
 
 #include "Component.h"
@@ -94,12 +94,12 @@ public:
     ~InputComponent();
 
     void init() override;
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
 
     bool isKeyDown(Key key);
 
 private:
-    const Uint8* m_keyStates;
+    const bool* m_keyStates;
     SDL_Scancode mapKeyToSDL(Key key);
     std::map<Key, SDL_Scancode> m_keyMappings;
     void InitKeyMappings();

include/Manager.h

@@ -24,7 +24,7 @@ class Manager
 public:
 	Manager(GameInternal* game) : game(game) {};
 	
-	void update(); //!< \sa Entity::update()
+	void update(uint_fast16_t diffTime); //!< \sa Entity::update()
 	//! Disables all functionality of entities marked for destruction  
 	//! \sa Entity::destroy()
 	void refresh();

include/Map.h

@@ -34,7 +34,7 @@ private:
 
 	struct TileSetData {
 		std::string texturePath{};
-		tmx::Vector2i textureSize;
+		tmx::Vector2f textureSize;
 		uint32_t tileCount{};
 		tmx::Vector2u tileCount2D;
 		uint32_t firstGID{};

include/PowerupComponent.h

@@ -9,7 +9,7 @@ public:
 	PowerupComponent(std::function<void (Entity*)> func);
 	~PowerupComponent() {};
 
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
 
 private:
 	std::function<void (Entity*)> pickupFunc;

include/ProjectileComponent.h

@@ -16,14 +16,14 @@ public:
     ~ProjectileComponent() {}
 
     void init() override;
-    void update() override;
+    void update(uint_fast16_t diffTime) override;
 
 private:
     TransformComponent* transformComponent;
 
     int range = 0;
-    int speed = 0;
+    float speed = 0;
-    int distance = 0;
+    float distance = 0;
 
     Entity* owner = nullptr;
 

include/SoundManager.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <SDL_mixer.h>
+#include <SDL3_mixer/SDL_mixer.h>
 #include <map>
 #include <vector>
 

include/SpriteComponent.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <map>
-#include <SDL_render.h>
+#include <SDL3/SDL_render.h>
 #include <memory>
 #include <string>
 
@@ -22,7 +22,7 @@ public:
 private:
 	TransformComponent* transform;
 	SDL_Texture* texture;
-	SDL_Rect srcRect, destRect;
+	SDL_FRect srcRect, destRect;
 
 	const char* texturePath;
 
@@ -48,7 +48,7 @@ public:
 	void setTexture(const char* path);
 
 	void init() override;
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
 	void draw() override;
 	void playAnimation(std::string type);
 	void setDirection(Direction direction);

include/StatEffectsComponent.h

@@ -16,7 +16,7 @@ public:
 	~StatEffectsComponent() {};
 
 	void init() override;
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
 
 	void modifyStatDur(Stats stat, int duration, int value);
 

include/TextureManager.h

@@ -1,7 +1,8 @@
 #pragma once
 
 #include "ECS.h"
-#include <SDL_render.h>
+#include "SDL3/SDL_surface.h"
+#include <SDL3/SDL_render.h>
 #include <map>
 #include <memory>
 #include <string>
@@ -21,7 +22,10 @@ class TextureManager
 
 		SDL_Texture* loadTexture(const char* fileName);
         static std::vector<SDL_Rect> splitSpriteSheet(SDL_Texture* spriteSheet, int width, int height, int spritesOnSheet);
-		static void draw(SDL_Renderer* renderer, SDL_Texture* texture, SDL_Rect src, SDL_Rect dest, bool flipped = false);
+		static void draw(SDL_Renderer* renderer, SDL_Texture* texture, SDL_FRect src, SDL_FRect dest, bool flipped = false);
+
+		void setScaleMode(SDL_ScaleMode scaleMode) { this->scaleMode = scaleMode; }
 	private:
+		SDL_ScaleMode scaleMode = SDL_SCALEMODE_NEAREST;
 		Manager* manager;
 };

include/TileComponent.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <SDL.h>
+#include <SDL3/SDL.h>
 #include <string>
 #include <map>
 

include/TransformComponent.h

@@ -25,11 +25,11 @@ public:
 
 	void init() override;
 	/*! TODO: document usage of collision handler */
-	void update() override;
+	void update(uint_fast16_t diffTime) override;
     void setPositionAfterCollision(Vector2D& positionChange);
 	void modifySpeed(int8_t modifier);
 
 private:
-	int speed = 3;
+	int speed = 180;
 	int speedMod = 0;
 };

include/Vector2D.h

@@ -1,7 +1,7 @@
 #pragma once
 
-#include <SDL.h>
+#include <SDL3/SDL.h>
-#include <SDL_rect.h>
+#include <SDL3/SDL_rect.h>
 
 class Vector2D
 {

src/AssetManager.cpp

@@ -46,7 +46,7 @@ Mix_Music* AssetManager::getMusic(std::string id)
 	return music.at(id);
 }
 
-void AssetManager::createProjectile(Vector2D pos, Vector2D velocity, int scale, int range, int speed, const char* texturePath, Entity* owner) {
+void AssetManager::createProjectile(Vector2D pos, Vector2D velocity, int scale, int range, float speed, const char* texturePath, Entity* owner) {
 
     auto& projectile(man->addEntity());
     projectile.addComponent<TransformComponent>(pos.x, pos.y, 32, 32, scale); //32x32 is standard size for objects
@@ -86,7 +86,7 @@ Vector2D AssetManager::calculateSpawnPosition()
 		conflict = false;
 		for (auto cc : this->man->getGame()->collisionHandler->getColliders({ Entity::GroupLabel::MAPTILES }))
 		{
-			if (SDL_HasIntersection(&spawnRect, &cc->collider) && strcmp(cc->tag, "projectile"))
+			if (SDL_HasRectIntersection(&spawnRect, &cc->collider) && strcmp(cc->tag, "projectile"))
 			{
 				conflict = true;
 				break;

src/ColliderComponent.cpp

@@ -31,10 +31,10 @@ void ColliderComponent::init()
 	}
 
 	transform = &entity->getComponent<TransformComponent>();
-	this->update();
+	this->update(0);
 }
 
-void ColliderComponent::update()
+void ColliderComponent::update(uint_fast16_t diffTime)
 {
 	collider.x = transform->position.x - (transform->width - transform->width * transform->scale * this->hitboxScale) / 2;
 	collider.y = transform->position.y - (transform->width - transform->width * transform->scale * this->hitboxScale) / 2;

src/CollisionHandler.cpp

@@ -6,7 +6,7 @@
 #include "Manager.h"
 #include "Vector2D.h"
 
-#include <SDL_rect.h>
+#include <SDL3/SDL_rect.h>
 #include <bitset>
 #include <cstdio>
 #include <memory>
@@ -26,7 +26,7 @@ IntersectionBitSet CollisionHandler::getIntersection(Entity* entityA, Entity* en
 	colliderB.x += posModB.x;
 	colliderB.y += posModB.y;
 
-	if (!SDL_HasIntersection(
+	if (!SDL_HasRectIntersection(
 		&colliderA,
 		&colliderB))
 		return std::bitset<DIRECTION_C>();
@@ -152,7 +152,7 @@ Entity* CollisionHandler::getAnyIntersection<Entity*>(
 	if (!entity->hasComponent<ColliderComponent>()) return nullptr;
 	for (auto& collider : getColliders(groupLabels, excludedEntities)) {
 		SDL_Rect rect = entity->getComponent<ColliderComponent>().collider + posMod;
-   	    if (SDL_HasIntersection(&rect, &collider->collider)) {
+   	    if (SDL_HasRectIntersection(&rect, &collider->collider)) {
    	    	return collider->entity;
    	    }
 	}
@@ -175,7 +175,7 @@ bool CollisionHandler::getAnyIntersection<bool>(
 	if (!entity->hasComponent<ColliderComponent>()) return false;
 	for (auto& collider : getColliders(groupLabels, excludedEntities)) {
 		SDL_Rect rect = entity->getComponent<ColliderComponent>().collider + posMod;
-   	    if (SDL_HasIntersection(&rect, &collider->collider)) {
+   	    if (SDL_HasRectIntersection(&rect, &collider->collider)) {
    	    	return true;
    	    }
 	}

src/Entity.cpp

@@ -4,9 +4,9 @@
 #include "Component.h"
 #include <cstddef>
 
-void Entity::update() const
+void Entity::update(uint_fast16_t diffTime) const
 {
-	for (auto const& c : components) c->update();
+	for (auto const& c : components) c->update(diffTime);
 }
 
 bool Entity::hasGroup(Group mGroup)

src/GameInternal.cpp

@@ -1,23 +1,20 @@
 #include "GameInternal.h"
 
-#include <SDL_error.h>
-
 #include "CollisionHandler.h"
 #include "AssetManager.h"
 #include "RenderManager.h"
-#include "SDL_mixer.h"
+#include <SDL3_mixer/SDL_mixer.h>
+#include "SDL3/SDL_init.h"
 #include "SoundManager.h"
-#include "TileComponent.h"
-#include "Direction.h"
 #include "Entity.h"
 #include "HealthComponent.h"
 #include "Map.h"
 #include "TextureManager.h"
-#include "StatEffectsComponent.h"
-#include "Constants.h"
 #include "Game.h"
 #include "GameFactory.h"
 
+#include <VEGO.h>
+
 GameInternal::GameInternal() :
 	manager(this),
 	renderManager(),
@@ -30,7 +27,7 @@ GameInternal::GameInternal() :
 
 GameInternal::~GameInternal() = default;
 
-void GameInternal::init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen)
+SDL_AppResult GameInternal::init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen)
 {
 	GameInternal::assets = new AssetManager(&manager);
 	GameInternal::textureManager = new TextureManager(&manager);
@@ -43,24 +40,24 @@ void GameInternal::init(const char* title, int xpos, int ypos, int width, int he
 		flags = SDL_WINDOW_FULLSCREEN;
 	}
 
-	if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
+	if (!SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO))
 	{
 		std::cout << "ERROR. Subsystem couldnt be initialized! " << SDL_GetError() << std::endl;
 		SDL_ClearError();
-		return;
+		return SDL_APP_FAILURE;
 	}
 
 	if (Mix_Init(MIX_INIT_MP3) != MIX_INIT_MP3) {
 		std::cout << "ERROR. Subsystem couldnt be initialized!" << std::endl;
-		return;
+		return SDL_APP_FAILURE;
 	}
 
-	window = SDL_CreateWindow(title, xpos, ypos, width, height, flags);
+	window = SDL_CreateWindow(title, width, height, flags);
 	if (!window)
 	{
 		std::cout << "ERROR: Window couldnt be created! " << SDL_GetError() << std::endl;
 		SDL_ClearError();
-		return;
+		return SDL_APP_FAILURE;
 	}
 
     // bad
@@ -72,20 +69,20 @@ void GameInternal::init(const char* title, int xpos, int ypos, int width, int he
 
     SDL_SetWindowIcon(window, icon);
 
-	renderer = SDL_CreateRenderer(window, -1, 0);
+	renderer = SDL_CreateRenderer(window, NULL);
 	if (!renderer)
 	{
 		std::cout << "ERROR: Renderer couldnt be created! " << SDL_GetError() << std::endl;
 		SDL_ClearError();
-		return;
+		return SDL_APP_FAILURE;
 	}
 	SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
 
-	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0)
+	if (!Mix_OpenAudio(0, NULL))
 	{
 		std::cout << "ERROR: Mixer couldnt be initialized! " << SDL_GetError() << std::endl;
 		SDL_ClearError();
-		return;
+		return SDL_APP_FAILURE;
 	}
 
 	Mix_Volume(-1, MIX_MAX_VOLUME);
@@ -100,6 +97,8 @@ void GameInternal::init(const char* title, int xpos, int ypos, int width, int he
 
 	this->gameInstance = GameFactory::instance().create(this);
 	this->gameInstance->init();
+
+	return SDL_APP_CONTINUE;
 }
 
 void GameInternal::handleEvents()
@@ -108,7 +107,7 @@ void GameInternal::handleEvents()
 
 	switch (event.type)
 	{
-		case SDL_QUIT: this->setRunning(false);
+		case SDL_EVENT_QUIT: this->setRunning(false);
 			break;
 
 		default:
@@ -116,12 +115,16 @@ void GameInternal::handleEvents()
 	}
 }
 
-void GameInternal::update()
+void GameInternal::update(Uint64 frameTime)
 {
 	manager.refresh();
-	manager.update();
 
-	this->gameInstance->update(); // TODO: this might have to be split up into two update functions, before and after manager...
+	uint_fast16_t diffTime = frameTime - this->lastFrameTime;
+	manager.update(diffTime);
+
+	this->gameInstance->update(diffTime); // TODO: this might have to be split up into two update functions, before and after manager...
+
+	this->lastFrameTime = frameTime;
 }
 
 void GameInternal::render()

src/InputComponent.cpp

@@ -10,7 +10,7 @@ InputComponent::~InputComponent() = default;
 
 void InputComponent::init(){}
 
-void InputComponent::update()
+void InputComponent::update(uint_fast16_t diffTime)
 {
     SDL_PumpEvents();
 }

src/Manager.cpp

@@ -27,9 +27,9 @@ void Manager::refresh()
 		std::end(entities));
 }
 
-void Manager::update()
+void Manager::update(uint_fast16_t diffTime)
 {
-	for (auto& e : entities) e->update();
+	for (auto& e : entities) e->update(diffTime);
 }
 
 void Manager::addToGroup(Entity* mEntity, Group mGroup)

src/Map.cpp

@@ -9,8 +9,8 @@
 #include <ranges>
 #include <vector>
 
-#include <SDL_error.h>
+#include <SDL3/SDL_error.h>
-#include <SDL_render.h>
+#include <SDL3/SDL_render.h>
 
 #include <tmxlite/Layer.hpp>
 #include <tmxlite/Map.hpp>
@@ -102,16 +102,14 @@ void Map::loadTileLayer(const tmx::TileLayer& layer)
     | std::views::transform([&](uint16_t i) {
         const char* texturePath = this->mapData.texturePaths->at(i).c_str();
 
-        tmx::Vector2i textureSize;
+        tmx::Vector2f textureSize;
-        SDL_QueryTexture(
+        SDL_GetTextureSize(
             VEGO_Game().textureManager->loadTexture(texturePath),
-            nullptr,
-            nullptr,
             &(textureSize.x),
             &(textureSize.y)
         );
 
-        tmx::Vector2u tileCount2D = { textureSize.x / this->mapData.mapTileSize->x, textureSize.y / this->mapData.mapTileSize->y };
+        tmx::Vector2u tileCount2D = { static_cast<unsigned int>(textureSize.x / this->mapData.mapTileSize->x), static_cast<unsigned int>(textureSize.y / this->mapData.mapTileSize->y) };
 
         uint32_t tileCount = this->mapData.tileSets->at(i).getTileCount();
         uint32_t firstGID = this->mapData.tileSets->at(i).getFirstGID();

src/PowerupComponent.cpp

@@ -12,7 +12,7 @@ PowerupComponent::PowerupComponent(std::function<void (Entity*)> func)
     this->pickupFunc = func;
 }
 
-void  PowerupComponent::update()
+void  PowerupComponent::update(uint_fast16_t diffTime)
 {
     Entity* player;
     if ((player = this->entity->getManager().getGame()->collisionHandler->getAnyIntersection<Entity*>(

src/ProjectileComponent.cpp

@@ -17,9 +17,9 @@ void ProjectileComponent::init()
     SoundManager::playSound(this->entity->getManager().getGame(), "throw_egg", true, PLAY_ONCE, MAX_VOLUME, -1);
 }
 
-void ProjectileComponent::update() 
+void ProjectileComponent::update(uint_fast16_t diffTime) 
 {
-    distance += speed;
+    distance += speed * diffTime * (1.f/1000);
 
     IntersectionBitSet boundsIntersection = this->entity->getManager().getGame()->collisionHandler->getIntersectionWithBounds(entity);
 

src/SoundManager.cpp

@@ -1,9 +1,10 @@
 #include "SoundManager.h"
 
-#include <stdexcept>
 #include <string>
 #include <iostream>
 
+#include <SDL3_mixer/SDL_mixer.h>
+
 #include "GameInternal.h"
 #include "AssetManager.h"
 
@@ -65,12 +66,12 @@ void SoundManager::playSound(GameInternal* game, std::string sound, bool canOver
 
 	if(Mix_VolumeChunk(game->assets->getSound(sound), volume) == -1)
 	{
-		std::cerr << "Error adjusting volume: " << Mix_GetError() << std::endl;
+		std::cerr << "Error adjusting volume: " /*<< Mix_GetError()*/ << std::endl;
 	}
 
 	if (Mix_PlayChannel(channel, game->assets->getSound(sound), loops) == -1) 
 	{
-		std::cerr << "Error playing sound '" << sound << "': " << Mix_GetError() << std::endl;
+		std::cerr << "Error playing sound '" << sound << "': " /*<< Mix_GetError()*/ << std::endl;
 	}
 }
 
@@ -87,12 +88,12 @@ void SoundManager::playMusic(GameInternal* game, std::string music, int loops, i
 
 	if(Mix_VolumeMusic(volume) == -1)
 	{
-		std::cerr << "Error adjusting volume: " << Mix_GetError() << std::endl;
+		std::cerr << "Error adjusting volume: " /*<< Mix_GetError()*/ << std::endl;
 	}
 
 	if (Mix_PlayMusic(game->assets->getMusic(music), loops) == -1) 
 	{
-		std::cerr << "Error playing music '" << music << "': " << Mix_GetError() << std::endl;
+		std::cerr << "Error playing music '" << music << "': " /*<< Mix_GetError()*/ << std::endl;
 	}
 }
 

src/SpriteComponent.cpp

@@ -1,6 +1,6 @@
 #include "SpriteComponent.h"
 
-#include <SDL_timer.h>
+#include <SDL3/SDL_timer.h>
 #include <cstring>
 #include <memory>
 
@@ -59,14 +59,14 @@ void SpriteComponent::init()
 	this->srcRect.x = this->textureXOffset * this->srcRect.w;
 	this->srcRect.y = this->textureYOffset * this->srcRect.h;;
 
-	this->update();
+	this->update(0);
 }
 
-void SpriteComponent::update()
+void SpriteComponent::update(uint_fast16_t diffTime)
 {
 	// This code is not compatible for animated tiles
 	if (animated) {
-		srcRect.x = srcRect.w * static_cast<int>((SDL_GetTicks() / speed) % frames);
+		srcRect.x = srcRect.w * static_cast<int>((SDL_GetTicks() / speed) % frames); // TODO: should not call SDL_GetTicks() but use diffTime
 
 		srcRect.y = animationIndex * transform->height;
 	}

src/StatEffectsComponent.cpp

@@ -8,16 +8,16 @@
 void StatEffectsComponent::init()
 {}
 
-void StatEffectsComponent::update()
+void StatEffectsComponent::update(uint_fast16_t diffTime)
 {
 	for (int i = 0; i < MAX_STATS; i++)
 	{
-		if (this->buffs.at(i) == 0) continue;
+		if (this->buffs.at(i) <= 0) continue;
-		if (this->buffs.at(i) - 1 == 0)
+		if (this->buffs.at(i) - diffTime <= 0)
 		{
 			this->resetStatValue((Stats)i);
 		}
-		this->buffs.at(i) -= 1;
+		this->buffs.at(i) -= diffTime;
 	}
 }
 
@@ -32,7 +32,7 @@ void StatEffectsComponent::modifyStatValue(Stats stat, int modifier) //modifier
 	switch (stat)
 	{
 	case Stats::MOVEMENT_SPEED:
-		this->entity->getComponent<TransformComponent>().modifySpeed(modifier);
+		this->entity->getComponent<TransformComponent>().modifySpeed(modifier * 60);
 		break;
 	case Stats::ATTACK_SPEED:
 		// this->entity->getComponent<KeyboardController>().modifyAtkSpeed(modifier);

src/TextureManager.cpp

@@ -1,6 +1,5 @@
 #include "TextureManager.h"
 
-#include <memory>
 #include <stdexcept>
 #include <string>
 
@@ -14,13 +13,14 @@ SDL_Texture* TextureManager::loadTexture(const char* fileName)
 	}
 	auto texture = IMG_LoadTexture(this->manager->getGame()->renderer, fileName);
 	if (texture == NULL) throw std::runtime_error(std::string("Couldn't load texture '") + fileName + "'");
+	SDL_SetTextureScaleMode(texture, this->scaleMode); // linear scaling results in blurry images
 	this->texture_cache.emplace(std::string(fileName), texture);
 	printf("Loaded texture at '%s'\n", fileName);
 	return texture;
 }
 
-void TextureManager::draw(SDL_Renderer* renderer, SDL_Texture* texture, SDL_Rect src, SDL_Rect dest, bool flipped)
+void TextureManager::draw(SDL_Renderer* renderer, SDL_Texture* texture, SDL_FRect src, SDL_FRect dest, bool flipped)
 {
-	SDL_RendererFlip flip = flipped ? SDL_FLIP_HORIZONTAL : SDL_FLIP_NONE;
+	SDL_FlipMode flip = flipped ? SDL_FLIP_HORIZONTAL : SDL_FLIP_NONE;
-	SDL_RenderCopyEx(renderer, texture, &src, &dest, 0, NULL, flip);
+	SDL_RenderTextureRotated(renderer, texture, &src, &dest, 0, NULL, flip);
 }

src/TransformComponent.cpp

@@ -50,12 +50,12 @@ void TransformComponent::init()
 	direction.zero();
 }
 
-void TransformComponent::update()
+void TransformComponent::update(uint_fast16_t diffTime)
 {
 	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,
+		direction.x * this->getSpeed() * multiplier * diffTime * (1.f/1000),
-		direction.y * this->getSpeed() * multiplier
+		direction.y * this->getSpeed() * multiplier * diffTime * (1.f/1000)
 	);
 
 	if (this->entity->hasGroup((size_t)Entity::GroupLabel::PLAYERS)){

src/Vector2D.cpp

@@ -1,5 +1,5 @@
 #include "Vector2D.h"
-#include "SDL_rect.h"
+#include <SDL3/SDL_rect.h>
 
 Vector2D::Vector2D()
 {

src/_Init.cpp

@@ -0,0 +1,48 @@
+#include "SDL3/SDL_init.h"
+#include <cstdint>
+#define SDL_MAIN_USE_CALLBACKS
+#include <SDL3/SDL_main.h>
+
+#include <iostream>
+#include <ctime>
+
+#include "VEGO.h"
+#include "Entity.h"
+#include "GameInternal.h"
+#include "Constants.h"
+
+GameInternal* vego::game = nullptr;
+
+SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv) {
+    srand(time(NULL));
+    bool playing = true;
+
+    *appstate = vego::game = new GameInternal();
+
+    return vego::game->init("No_Name_Chicken_Game", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, SCREEN_SIZE_WIDTH, SCREEN_SIZE_HEIGHT, false);
+}
+
+SDL_AppResult SDL_AppIterate(void *appstate) {
+    if (!vego::game->isRunning()) {
+        return SDL_APP_SUCCESS;
+    }
+
+    vego::game->handleEvents(); // bad
+
+    Uint64 frameStart = SDL_GetTicks();
+
+    vego::game->update(frameStart);
+    vego::game->render();
+
+    int frameTime = SDL_GetTicks() - frameStart;
+
+    return SDL_APP_CONTINUE;
+}
+
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
+    return SDL_APP_CONTINUE;
+}
+
+void SDL_AppQuit(void *appstate, SDL_AppResult result) {
+    vego::game->clean();
+}

src/main.cpp

@@ -1,41 +0,0 @@
-#include <iostream>
-#include <ctime>
-
-#include "VEGO.h"
-#include "Entity.h"
-#include "GameInternal.h"
-#include "Constants.h"
-
-GameInternal* vego::game = nullptr;
-
-int main(int argc, char* argv[])
-{
-	srand(time(NULL));
-    bool playing = true;
-
-	const int frameDelay = 1000 / FPS;
-
-	Uint32 frameStart;
-	int frameTime;
-
-	vego::game = new GameInternal();
-
-	vego::game->init("No_Name_Chicken_Game", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, SCREEN_SIZE_WIDTH, SCREEN_SIZE_HEIGHT, false);
-        while (vego::game->isRunning()) {
-            frameStart = SDL_GetTicks();
-
-            vego::game->handleEvents();
-            vego::game->update();
-            vego::game->render();
-
-            frameTime = SDL_GetTicks() - frameStart;
-
-            if (frameDelay > frameTime) {
-                SDL_Delay(frameDelay - frameTime);
-            }
-        }
-
-    vego::game->clean();
-
-	return 0;
-}