Replace current rendering method by Type Erasure

source/engine/graphics/utility/overloaded.hpp

+#pragma once
+
+namespace megu {
+    template <class... Ts>
+    struct overloaded : Ts ... {
+        using Ts::operator()...;
+    };
+
+    template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
+}
\ No newline at end of file

source/engine/graphics/utility/ref_set.hpp

-#pragma once
-
-#include <set>
-#include "reference_sorter.hpp"
-
-namespace megu {
-    template <class T>
-    using ref_set = std::set<std::reference_wrapper<T>, reference_sorter<T>>;
-}
\ No newline at end of file

source/main.cpp

@@ -169,7 +169,8 @@ int main(int argc, const char * argv[]) {
         megu::Renderer basic_renderer(360, 360);
 
         engine.push(0, basic_renderer);
-        engine.push(0, 0, *images.front());
+
+        engine.push<megu::Image>(0, 0, *((images.front()).get()));
 
         //? Render Loop
         std::cout << "Render Loop Begin !" << std::endl;