model now use shared ptr + cache system to spare memmory

lib/Ray/sources/Model/Model.hpp

@@ -14,7 +14,8 @@
 #include <raylib.h>
 #include <vector>
 #include <optional>
-#include <map>
+#include <unordered_map>
+#include <memory>
 
 namespace RAY::Drawables::Drawables3D {
 	//! @brief Basic 3D Model type
@@ -42,8 +43,8 @@ namespace RAY::Drawables::Drawables3D {
 			//! @brief A model is assignable
 			Model& operator=(const Model &model) = default;
 
-			//! @brief Model destructor, unloads all related data
-			~Model();
+			//! @brief Model destructor, model's data will be deleted if it's the last entity alive
+			~Model() = default;
 
 			//! @brief Unload model (excluding meshes) from memory (RAM and/or VRAM)
 			bool unloadKeepMeshes();
@@ -81,15 +82,19 @@ namespace RAY::Drawables::Drawables3D {
 
 		private:
 			//! @brief Raw data from raylib
-			::Model _model;
+			std::shared_ptr<::Model> _model;
 			//! @brief The list of textures that can be applied to this model.
-			std::map<MaterialType, Texture> _textureList;
+			std::unordered_map<MaterialType, Texture> _textureList;
 			//! @brief Rotation property
 			RAY::Vector3 _rotationAxis;
 			//! @brief Rotation property
 			float _rotationAngle;
 			//! @brief Scale of the shape
 			RAY::Vector3 _scale;
+			//! @brief, look through cache to see if a model using same file
+			std::shared_ptr<::Model>fetchModelInCache(const std::string &path);
+
+			static std::unordered_map<std::string, std::shared_ptr<::Model>> _modelsCache;
 
 		INTERNAL:
 			//! @brief A RAY Model is cast-able in libray's model