feat: engine variant

integrate engine variant
add property registry and database
modify render system to use new transform components

.gitignore

@@ -5,6 +5,7 @@ build-web/
 bin/
 web/
 debug/
+vendor/
 
 # artifacts
 compile_commands.json

src/engine/core/application.cpp

@@ -1,87 +1,89 @@
 // src/engine/core/application.cpp
 
 #include "engine/core/application.hpp"
-#include "engine/core/service-locator.hpp"
 #include "engine/asset/raylib-asset.hpp"
+#include "engine/core/engine-variant/engine-variant-property.hpp"
+#include "engine/core/service-locator.hpp"
 
+#include "engine/ecs/bindings.hpp"
 #include "engine/scene/scene.hpp"
 #include "imgui.h"
 #include "raylib.h"
 #include "rlImGui.h"
 #include <memory>
 
-
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
 #endif
 
 namespace varicle {
 
-    void game_loop(void){
+void game_loop(void) {
 
-        auto& scene_manager = ServiceLocator::get<SceneManager>();  
+    auto &scene_manager = ServiceLocator::get<SceneManager>();
 
-        float dt = GetFrameTime();
+    float dt = GetFrameTime();
 
-        // Update
-        scene_manager.update(dt);
+    // Update
+    scene_manager.update(dt);
 
-        // Draw
-        BeginDrawing();
-        ClearBackground(RAYWHITE); // Or a configurable engine default color
+    // Draw
+    BeginDrawing();
+    ClearBackground(RAYWHITE); // Or a configurable engine default color
 
-        scene_manager.render();
+    scene_manager.render();
 
-        rlImGuiBegin();
-        scene_manager.ui();
-        rlImGuiEnd();
+    rlImGuiBegin();
+    scene_manager.ui();
+    rlImGuiEnd();
 
-        EndDrawing();
+    EndDrawing();
 
-        scene_manager.process_scene_switch();
-    }
+    scene_manager.process_scene_switch();
+}
 
-    void Application::run() {
-        // 1. Initialize Raylib
-        SetTraceLogLevel(LOG_NONE);
-        SetConfigFlags(FLAG_VSYNC_HINT);
-        InitWindow(m_window_width, m_window_height, m_window_title);
-        SetTargetFPS(60); 
-        rlImGuiSetup(true); // initialize gui
+void Application::run() {
+    // 1. Initialize Raylib
+    SetTraceLogLevel(LOG_NONE);
+    SetConfigFlags(FLAG_VSYNC_HINT);
+    InitWindow(m_window_width, m_window_height, m_window_title);
+    SetTargetFPS(60);
+    rlImGuiSetup(true); // initialize gui
 
-        ServiceLocator::provide(std::make_unique<RaylibAssetLoader>());
-        ServiceLocator::provide(std::make_unique<SceneManager>());
+    // 2. Setup Service Locators
+    ServiceLocator::provide(std::make_unique<PropertyDatabase>());
+    ServiceLocator::provide(std::make_unique<RaylibAssetLoader>());
+    ServiceLocator::provide(std::make_unique<SceneManager>());
 
-        // 2. Call game-specific startup (where the game creates its first scene)
-        on_init(); 
+    register_all_component_properties(ServiceLocator::get<PropertyDatabase>());
 
-        auto& scene_manager = ServiceLocator::get<SceneManager>();  
+    // 3. Call game-specific startup (where the game creates its first scene)
+    on_init();
 
+    auto &scene_manager = ServiceLocator::get<SceneManager>();
 
 #ifdef __EMSCRIPTEN__
-        emscripten_set_main_loop(game_loop, 0, 1);
+    emscripten_set_main_loop(game_loop, 0, 1);
 #else
-        while (!scene_manager.should_game_close()){
-            game_loop();
-        }
+    while (!scene_manager.should_game_close()) {
+        game_loop();
+    }
 #endif
 
-        // 4. Call game-specific cleanup
-        on_shutdown(); 
+    // 4. Call game-specific cleanup
+    on_shutdown();
 
-        ServiceLocator::shutdown(); // Clean up services
-
-        // 5. Close Raylib
-        rlImGuiShutdown();
-        CloseWindow();
-    }
-
-    void Application::change_scene(std::string scene_id) {
-        ServiceLocator::get<SceneManager>().switch_to_scene(scene_id);  
-    }
-
-    void Application::quit() {
-        ServiceLocator::get<SceneManager>().quit();  
-    }
+    ServiceLocator::shutdown(); // Clean up services
 
+    // 5. Close Raylib
+    rlImGuiShutdown();
+    CloseWindow();
 }
+
+void Application::change_scene(std::string scene_id) {
+    ServiceLocator::get<SceneManager>().switch_to_scene(scene_id);
+}
+
+void Application::quit() { ServiceLocator::get<SceneManager>().quit(); }
+
+} // namespace varicle

src/engine/core/engine-variant/engine-variant-operation.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <engine_variant.hpp>
+#include "engine-variant.hpp"
 
 template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
 template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;

src/engine/core/engine-variant/engine-variant-property.hpp

@@ -0,0 +1,82 @@
+#pragma once
+
+#include "engine-variant.hpp"
+
+#include <entt/entt.hpp>
+#include <functional>
+#include <unordered_map>
+
+using VariantGetter =
+    std::function<EngineVariant(const entt::registry &, entt::entity)>;
+using VariantSetter = std::function<void(entt::registry &, entt::entity,
+                                         const EngineVariant &)>;
+
+struct PropertyRef {
+    uint32_t property_id;
+    VariantSetter setter;
+    VariantGetter getter;
+
+    EngineVariant get(const entt::registry &reg, entt::entity e) const {
+        return getter ? getter(reg, e) : EngineVariant();
+    }
+
+    void set(entt::registry &reg, entt::entity e,
+             const EngineVariant &value) const {
+        if (setter)
+            setter(reg, e, value);
+    }
+};
+
+class PropertyRegistry {
+  public:
+    template <typename Component, typename T>
+    static PropertyRef bind_field(uint32_t prop_hash, T Component::*member) {
+        return PropertyRef{.property_id = prop_hash,
+
+                           .setter =
+                               [member](entt::registry &reg, entt::entity e,
+                                        const EngineVariant &val) {
+                                   if (auto *comp = reg.try_get<Component>(e)) {
+                                       (*comp).*member = val.Get<T>();
+                                   }
+                               },
+                           .getter = [member](const entt::registry &reg,
+                                              entt::entity e) -> EngineVariant {
+                               if (auto *component =
+                                       reg.try_get<Component>(e)) {
+                                   return EngineVariant((*component).*member);
+                               }
+                               return EngineVariant();
+                           }
+        };
+    }
+};
+
+class PropertyDatabase {
+  private:
+    std::unordered_map<uint32_t, PropertyRef> properites;
+
+  public:
+    void register_property(uint32_t prop_hash, PropertyRef ref) {
+        properites[prop_hash] = std::move(ref);
+    }
+
+    EngineVariant get_value(const entt::registry &reg, entt::entity e,
+                            uint32_t prop_hash) const {
+        auto it = properites.find(prop_hash);
+        if (it != properites.end()) {
+            return it->second.get(reg, e);
+        }
+        return EngineVariant();
+    }
+
+    bool set_value(entt::registry &reg, entt::entity e,
+                   uint32_t prop_hash, const EngineVariant &value) const {
+        auto it = properites.find(prop_hash);
+        if (it != properites.end()) {
+            it->second.set(reg, e, value);
+            return true;
+        }
+        return false;
+    }
+};

src/engine/core/engine-variant/engine-variant.hpp

@@ -0,0 +1,149 @@
+#pragma once
+#include <iostream>
+#include <string>
+#include <variant>
+
+// Overload helper pattern
+template <class... Ts> struct Overloaded : Ts... {
+    using Ts::operator()...;
+};
+template <class... Ts> Overloaded(Ts...) -> Overloaded<Ts...>;
+
+struct Vec2 {
+    float x = 0.0f;
+    float y = 0.0f;
+
+    bool operator==(const Vec2 &o) const { return x == o.x && y == o.y; }
+    bool operator!=(const Vec2 &o) const { return !(*this == o); }
+    Vec2 operator+(const Vec2 &o) const { return {x + o.x, y + o.y}; }
+    Vec2 operator-(const Vec2 &o) const { return {x - o.x, y - o.y}; }
+    Vec2 operator*(float scalar) const { return {x * scalar, y * scalar}; }
+};
+
+struct Vec3 {
+    float x = 0.0f;
+    float y = 0.0f;
+    float z = 0.0f;
+
+    bool operator==(const Vec3 &o) const {
+        return x == o.x && y == o.y && z == o.z;
+    }
+    bool operator!=(const Vec3 &o) const { return !(*this == o); }
+    Vec3 operator+(const Vec3 &o) const { return {x + o.x, y + o.y, z + o.z}; }
+    Vec3 operator-(const Vec3 &o) const { return {x - o.x, y - o.y, z - o.z}; }
+    Vec3 operator*(float scalar) const {
+        return {x * scalar, y * scalar, z * scalar};
+    }
+};
+
+struct Vec4 {
+    float x = 0.0f;
+    float y = 0.0f;
+    float z = 0.0f;
+    float w = 1.0f;
+
+    bool operator==(const Vec4 &o) const {
+        return x == o.x && y == o.y && z == o.z && w == o.w;
+    }
+    bool operator!=(const Vec4 &o) const { return !(*this == o); }
+    Vec4 operator+(const Vec4 &o) const {
+        return {x + o.x, y + o.y, z + o.z, w + o.w};
+    }
+    Vec4 operator-(const Vec4 &o) const {
+        return {x - o.x, y - o.y, z - o.z, w - o.w};
+    }
+    Vec4 operator*(float scalar) const {
+        return {x * scalar, y * scalar, z * scalar, w * scalar};
+    }
+};
+
+// Standalone Interpolation Helpers
+inline Vec2 Vec2Lerp(const Vec2 &s, const Vec2 &e, float a) {
+    return {s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a};
+}
+inline Vec3 Vec3Lerp(const Vec3 &s, const Vec3 &e, float a) {
+    return {s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a,
+            s.z + (e.z - s.z) * a};
+}
+inline Vec4 Vec4Lerp(const Vec4 &s, const Vec4 &e, float a) {
+    return {s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a, s.z + (e.z - s.z) * a,
+            s.w + (e.w - s.w) * a};
+}
+
+enum class VariantType { Null, Float, Vector2, Vector3, Vector4, String };
+
+class EngineVariant {
+
+  public:
+    using InternalVariant =
+        std::variant<std::monostate, float, Vec2, Vec3, Vec4, std::string, bool>;
+
+    EngineVariant() : data(std::monostate{}) {}
+    EngineVariant(float v) : data(v) {}
+    EngineVariant(Vec2 v) : data(v) {}
+    EngineVariant(Vec3 v) : data(v) {}
+    EngineVariant(Vec4 v) : data(v) {}
+    EngineVariant(std::string v) : data(v) {}
+    EngineVariant(bool v) : data(v) {}
+
+    template <typename T> T Get() const { return std::get<T>(data); }
+    template <typename T> T *TryGet() { return std::get_if<T>(&data); }
+
+    std::string ToString() const {
+        return std::visit(
+            Overloaded{[](std::monostate) { return std::string("!"); },
+                       [](float v) { return std::to_string(v); },
+                       [](const Vec2 &v) {
+                           return "(" + std::to_string(v.x) + ", " +
+                                  std::to_string(v.y) + ")";
+                       },
+                       [](const Vec3 &v) {
+                           return "(" + std::to_string(v.x) + ", " +
+                                  std::to_string(v.y) + ", " +
+                                  std::to_string(v.z) + ")";
+                       },
+                       [](const Vec4 &v) {
+                           return "(" + std::to_string(v.x) + ", " +
+                                  std::to_string(v.y) + ", " +
+                                  std::to_string(v.z) + ", " +
+                                  std::to_string(v.w) + ")";
+                       },
+                       [](const std::string &s) { return s; },
+                       [](const bool &b) {  return std::string(b ? "true" : "false"); }},
+            data);
+    }
+
+    friend std::ostream &operator<<(std::ostream &os,
+                                    const EngineVariant &variant) {
+        return os << variant.GetTypeName() << variant.ToString();
+    }
+
+  private:
+    InternalVariant data;
+
+    std::string GetTypeName() const {
+        return std::visit(
+            [](auto &&arg) -> std::string {
+                using T = std::decay_t<decltype(arg)>;
+                if constexpr (std::is_same_v<T, std::monostate>)
+                    return "Null";
+                else if constexpr (std::is_same_v<T, float>)
+                    return "Float";
+                else if constexpr (std::is_same_v<T, Vec2>)
+                    return "Vec2";
+                else if constexpr (std::is_same_v<T, Vec3>)
+                    return "Vec3";
+                else if constexpr (std::is_same_v<T, Vec4>)
+                    return "Vec4";
+                else if constexpr (std::is_same_v<T, std::string>)
+                    return "String";
+                else if constexpr (std::is_same_v<T, bool>)
+                    return "Bool";
+                else
+                    return "Unknown";
+            },
+            data);
+    }
+
+    friend class VariantOpManager;
+};

src/engine/core/engine_variant.hpp

@@ -1,109 +0,0 @@
-#pragma once
-#include <variant>
-#include <string>
-#include <mutex>
-#include <iostream>
-
-struct Vec2 {
-    float x = 0.0f;
-    float y = 0.0f;
-
-    bool operator==(const Vec2& o) const { return x == o.x && y == o.y; }
-    bool operator!=(const Vec2& o) const { return !(*this == o); }
-    Vec2 operator+(const Vec2& o) const { return { x + o.x, y + o.y }; }
-    Vec2 operator-(const Vec2& o) const { return { x - o.x, y - o.y }; }
-    Vec2 operator*(float scalar) const { return { x * scalar, y * scalar }; }
-};
-
-struct Vec3 {
-    float x = 0.0f;
-    float y = 0.0f;
-    float z = 0.0f;
-
-    bool operator==(const Vec3& o) const { return x == o.x && y == o.y && z == o.z; }
-    bool operator!=(const Vec3& o) const { return !(*this == o); }
-    Vec3 operator+(const Vec3& o) const { return { x + o.x, y + o.y, z + o.z }; }
-    Vec3 operator-(const Vec3& o) const { return { x - o.x, y - o.y, z - o.z }; }
-    Vec3 operator*(float scalar) const { return { x * scalar, y * scalar, z * scalar }; }
-};
-
-struct Vec4 {
-    float x = 0.0f;
-    float y = 0.0f;
-    float z = 0.0f;
-    float w = 1.0f;
-
-    bool operator==(const Vec4& o) const { return x == o.x && y == o.y && z == o.z && w == o.w; }
-    bool operator!=(const Vec4& o) const { return !(*this == o); }
-    Vec4 operator+(const Vec4& o) const { return { x + o.x, y + o.y, z + o.z, w + o.w }; }
-    Vec4 operator-(const Vec4& o) const { return { x - o.x, y - o.y, z - o.z, w - o.w }; }
-    Vec4 operator*(float scalar) const { return { x * scalar, y * scalar, z * scalar, w * scalar }; }
-};
-
-
-// Standalone Interpolation Helpers
-inline Vec2 Vec2Lerp(const Vec2& s, const Vec2& e, float a) { return { s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a }; }
-inline Vec3 Vec3Lerp(const Vec3& s, const Vec3& e, float a) { return { s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a, s.z + (e.z - s.z) * a }; }
-inline Vec4 Vec4Lerp(const Vec4& s, const Vec4& e, float a) { return { s.x + (e.x - s.x) * a, s.y + (e.y - s.y) * a, s.z + (e.z - s.z) * a, s.w + (e.w - s.w) * a }; }
-
-
-
-
-enum class VariantType { Null, Float, Vector2, Vector3, Vector4, String };
-
-class EngineVariant{
-
-    public:
-        using InternalVariant = std::variant<std::monostate,float,Vec2,Vec3,Vec4,std::string>;
-
-        EngineVariant() : data(std::monostate{}), type(VariantType::Null){}
-        EngineVariant(float v) : data(v), type(VariantType::Float){}
-        EngineVariant(Vec2 v) : data(v), type(VariantType::Vector2){}
-        EngineVariant(Vec3 v) : data(v), type(VariantType::Vector3){}
-        EngineVariant(Vec4 v) : data(v), type(VariantType::Vector4){}
-        EngineVariant(std::string v) : data(v), type(VariantType::String){}
-
-        VariantType GetType() const { return type; }
-
-        template<typename T>
-            T Get() const {
-                std::lock_guard<std::mutex> lock(v_mutex);
-                return std::get<T>(data);
-            }
-
-        void Print() const {
-
-            std::lock_guard<std::mutex> lock(v_mutex);
-            std::cout << "[Variant " << TypeToString(type) << "]: ";
-            std::visit([](auto &&arg){
-                    using T = std::decay_t<decltype(arg)>;
-                    if constexpr (std::is_same_v<T, std::monostate>) std::cout << "Null";
-                    else if constexpr (std::is_same_v<T, float>) std::cout << arg;
-                    else if constexpr (std::is_same_v<T, Vec2>) std::cout << "(" << arg.x << ", " << arg.y << ")";
-                    else if constexpr (std::is_same_v<T, Vec3>) std::cout << "(" << arg.x << ", " << arg.y << ", " << arg.z << ")";
-                    else if constexpr (std::is_same_v<T, Vec4>) std::cout << "(" << arg.x << ", " << arg.y << ", " << arg.z << ", " << arg.w << ")";
-                    else if constexpr (std::is_same_v<T, std::string>) std::cout << "\"" << arg << "\"";
-
-                    },data);
-
-            std::cout << "\n";
-        }
-
-    private:
-        InternalVariant data;
-        VariantType type;
-        mutable std::mutex v_mutex;
-
-        static std::string TypeToString(VariantType t) {
-            switch(t) {
-                case VariantType::Float: return "Float";
-                case VariantType::Vector2: return "Vector2";
-                case VariantType::Vector3: return "Vector3";
-                case VariantType::Vector4: return "Vector4";
-                case VariantType::String: return "String";
-                default: return "Null";
-            }
-        }
-
-    friend class VariantOpManager;
-};

src/engine/ecs/bindings.cpp

@@ -0,0 +1,92 @@
+#include "bindings.hpp"
+#include "components.hpp"
+
+using namespace entt::literals;
+
+void varicle::register_all_component_properties(PropertyDatabase &db) {
+
+    //----------------------------------------------------------
+    // LocalTransform2D
+    //----------------------------------------------------------
+    db.register_property(
+        "position"_hs,
+        PropertyRegistry::bind_field("position"_hs,
+                                     &varicle::LocalTransform2D::position));
+
+    db.register_property("scale"_hs,
+                         PropertyRegistry::bind_field(
+                             "scale"_hs, &varicle::LocalTransform2D::scale));
+
+    db.register_property(
+        "rotation"_hs,
+        PropertyRegistry::bind_field("rotation"_hs,
+                                     &varicle::LocalTransform2D::rotation));
+
+    //----------------------------------------------------------
+    // GlobalTransform2D
+    //----------------------------------------------------------
+    db.register_property(
+        "global_position"_hs,
+        PropertyRegistry::bind_field("global_position"_hs,
+                                     &varicle::GlobalTransform2D::position));
+
+    db.register_property("global_scale"_hs,
+                         PropertyRegistry::bind_field(
+                             "global_scale"_hs, &varicle::GlobalTransform2D::scale));
+
+    db.register_property(
+        "global_rotation"_hs,
+        PropertyRegistry::bind_field("global_rotation"_hs,
+                                     &varicle::GlobalTransform2D::rotation));
+
+    //----------------------------------------------------------
+    // Velocity
+    //----------------------------------------------------------
+
+    db.register_property(
+        "velocity:x"_hs,
+        PropertyRegistry::bind_field("velocity:x"_hs, &varicle::Velocity::dx));
+
+    db.register_property(
+        "velocity:y"_hs,
+        PropertyRegistry::bind_field("velocity:y"_hs, &varicle::Velocity::dy));
+
+    //----------------------------------------------------------
+    // Sprite
+    //----------------------------------------------------------
+
+    db.register_property(
+        "sprite:texture_path"_hs,
+        PropertyRegistry::bind_field("sprite:texture_path"_hs, &varicle::Sprite::texture_path));
+
+    db.register_property(
+        "sprite:offset:y"_hs,
+        PropertyRegistry::bind_field("sprite:offset:y"_hs, &varicle::Sprite::offset_y));
+
+    db.register_property(
+        "sprite:offset:x"_hs,
+        PropertyRegistry::bind_field("sprite:offset:x"_hs, &varicle::Sprite::offset_x));
+
+
+    db.register_property(
+        "sprite:width"_hs,
+        PropertyRegistry::bind_field("sprite:width"_hs, &varicle::Sprite::width));
+
+
+    db.register_property(
+        "sprite:height"_hs,
+        PropertyRegistry::bind_field("sprite:height"_hs, &varicle::Sprite::height));
+    
+    db.register_property(
+        "sprite:flip_h"_hs,
+        PropertyRegistry::bind_field("sprite:flip_h"_hs, &varicle::Sprite::flip_h));
+
+    db.register_property(
+        "sprite:flip_v"_hs,
+        PropertyRegistry::bind_field("sprite:flip_v"_hs, &varicle::Sprite::flip_v));
+
+    db.register_property(
+        "sprite:rotation"_hs,
+        PropertyRegistry::bind_field("sprite:rotation"_hs, &varicle::Sprite::rotation));
+
+}

src/engine/ecs/bindings.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "engine/core/engine-variant/engine-variant-property.hpp"
+
+namespace varicle {
+    // Single point of initialization for all engine component properties
+    void register_all_component_properties(PropertyDatabase& db);
+}

src/engine/ecs/components.hpp

@@ -1,28 +1,43 @@
 #pragma once
 
+#include "engine/core/engine-variant/engine-variant.hpp"
+#include <entt/entt.hpp>
 #include <raylib.h>
 
-namespace varicle{
+namespace varicle {
 
-    struct Position{
-        float x;
-        float y;
-    };
+struct Position {
+    float x;
+    float y;
+};
 
-    struct Velocity{
-        float dx;
-        float dy;
-    };
+struct Velocity {
+    float dx;
+    float dy;
+};
 
-    struct Sprite{
-        Texture *texture;
-        float offset_x;
-        float offset_y;
-        float width;
-        float height;
-        bool flip_h; 
-        bool flip_v; 
-        float rotation;
-    };
+struct LocalTransform2D {
+    Vec2 position;
+    float scale;
+    float rotation;
+};
 
-}
+struct GlobalTransform2D {
+    Vec2 position;
+    float scale;
+    float rotation;
+};
+
+struct Sprite {
+    std::string texture_path;
+    float offset_x;
+    float offset_y;
+    float width;
+    float height;
+    bool flip_h;
+    bool flip_v;
+    float rotation;
+};
+
+
+} // namespace varicle

src/engine/render/render-system.cpp

@@ -1,4 +1,6 @@
 #include "engine/render/render-system.hpp"
+#include "engine/asset/raylib-asset.hpp"
+#include "engine/core/service-locator.hpp"
 #include "engine/ecs/components.hpp"
 
 #include<raylib.h>
@@ -7,40 +9,45 @@
 namespace varicle {
 
     void update_render_system(entt::registry &registry){
-        auto view = registry.view<const Sprite, const Position>();
+        auto view = registry.view<const Sprite, const GlobalTransform2D>();
 
         for (entt::entity entity : view){
             const Sprite &sprite = view.get<Sprite>(entity);
-            const Position &pos = view.get<Position>(entity);
+            auto [global_position,global_scale,global_rotation] = view.get<GlobalTransform2D>(entity);
+            auto texture = ServiceLocator::get<RaylibAssetLoader>().get_texture(sprite.texture_path);
 
-            if (sprite.texture){
+            float width = sprite.width * global_scale;
+            float height = sprite.height * global_scale;
+            float rotation = sprite.rotation + global_rotation;
+
+            if (texture){
                 DrawTexturePro(
-                        *(sprite.texture),
+                        *(texture),
                         Rectangle{
                         0,
                         0,
-                        (float)sprite.texture->width,
-                        (float)sprite.texture->height,
+                        (float)texture->width,
+                        (float)texture->height,
                         },
                         Rectangle {
-                        sprite.offset_x + pos.x,
-                        sprite.offset_y + pos.y,
-                        sprite.width,
-                        sprite.height
+                        sprite.offset_x + global_position.x,
+                        sprite.offset_y + global_position.y,
+                        width,
+                        height,
                         },
-                        Vector2 {sprite.width * 0.5f, sprite.height*0.5f},
-                        sprite.rotation,
+                        Vector2 {width * 0.5f, height*0.5f},
+                        rotation, 
                         WHITE);
 
             }else{
                 DrawRectanglePro(Rectangle {
-                        sprite.offset_x + pos.x,
-                        sprite.offset_y + pos.y,
-                        sprite.width,
-                        sprite.height
+                        sprite.offset_x + global_position.x,
+                        sprite.offset_y + global_position.y,
+                        width,
+                        height
                         }, 
-                        Vector2 {sprite.width * 0.5f, sprite.height*0.5f},
-                        sprite.rotation,
+                        Vector2 {width * 0.5f, height*0.5f},
+                        rotation,
                         PURPLE
                         );
             }

src/game/main.cpp

@@ -1,9 +1,13 @@
 #include "engine/core/application.hpp"
+#include "engine/core/engine-variant/engine-variant-property.hpp"
+#include "engine/core/engine-variant/engine-variant.hpp"
 #include "engine/core/service-locator.hpp"
+#include "engine/ecs/components.hpp"
 #include "engine/scene/scene.hpp"
 
 #include "game/scenes/menu-scene/menu.hpp"
 
+#include <entt/entt.hpp>
 #include <raylib.h>
 
 class Game : public varicle::Application {

src/game/scenes/menu-scene/menu.cpp

@@ -1,6 +1,8 @@
 #include "menu.hpp"
 
 #include "engine/asset/raylib-asset.hpp"
+#include "engine/core/engine-variant/engine-variant-property.hpp"
+#include "engine/core/engine-variant/engine-variant.hpp"
 #include "engine/core/service-locator.hpp"
 #include "engine/ecs/components.hpp"
 #include "engine/render/render-system.hpp"
@@ -9,25 +11,42 @@
 #include <iostream>
 #include <memory>
 
+using namespace entt::literals;
+
 void MenuScene::init() {
     using namespace varicle;
     ServiceLocator::provide(std::make_unique<RaylibAssetLoader>());
 
-
-    auto& asset_loader =ServiceLocator::get<RaylibAssetLoader>(); asset_loader.load_asset("assets/bird.png");
+    auto &asset_loader = ServiceLocator::get<RaylibAssetLoader>();
+    asset_loader.load_asset("assets/bird.png");
     auto x = asset_loader.get_reader().get_asset_list();
-    for (auto i :x) {
+    for (auto i : x) {
         std::cout << i << std::endl;
     }
 
     auto e = registry.create();
-    registry.emplace<Position>(e,650.0f,150.0f);
-    auto bird_texture = asset_loader.get_texture("assets/bird.png");
-    registry.emplace<Sprite>(e,bird_texture,0.0f,0.f,100.f,100.f,false,false,0.f);
-    auto img = LoadImageFromTexture(*bird_texture);
+    registry.emplace<varicle::GlobalTransform2D>(e, 650.0f, 150.0f, 1.0f,0.0f);
+    // registry.emplace<Position>(e, 650.0f, 150.0f);
+    registry.emplace<Sprite>(e, "assets/bird.png", 0.0f, 0.f, 100.f, 100.f,
+                             false, false, 0.f);
+    auto img =
+        LoadImageFromTexture(*asset_loader.get_texture("assets/bird.png"));
     SetWindowIcon(img);
     UnloadImage(img);
 
+    auto &p_database = varicle::ServiceLocator::get<PropertyDatabase>();
+
+    registry.emplace<varicle::LocalTransform2D>(e, 100.0f, 100.0f, 10.0f,
+                                                5.0f);
+
+    EngineVariant current_pos =
+        p_database.get_value(registry, e, "global_position"_hs);
+    EngineVariant current_scale =
+        p_database.get_value(registry, e, "scale"_hs);
+    EngineVariant current_rot =
+        p_database.get_value(registry, e, "rotation"_hs);
+
+    std::cout << current_pos << current_scale << current_rot << std::endl;
 }
 
 void MenuScene::update(float dt) {}