restructure v2

engine/Backend/Model.h

@@ -0,0 +1,39 @@
+
+#pragma once
+
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+
+#include <engine/Backend/Shader.h>
+#include <engine/Backend/Mesh.h>
+
+class Model
+{
+public:
+    // model data
+    vector<Texture> textures_loaded;	// stores all the textures loaded so far, optimization to make sure textures aren't loaded more than once.
+    vector<Mesh>    meshes;
+    string directory;
+    bool gammaCorrection;
+
+    // constructor, expects a filepath to a 3D model.
+    Model(string const &path, bool gamma = false);
+
+    // draws the model, and thus all its meshes
+    void Draw(Shader &shader);
+
+private:
+    // loads a model with supported ASSIMP extensions from file and stores the resulting meshes in the meshes vector.
+    void loadModel(string const &path);
+
+    // processes a node in a recursive fashion. Processes each individual mesh located at the node and repeats this process on its children nodes (if any).
+    void processNode(aiNode *node, const aiScene *scene);
+
+    Mesh processMesh(aiMesh *mesh, const aiScene *scene);
+
+    // checks all material textures of a given type and loads the textures if they're not loaded yet.
+    // the required info is returned as a Texture struct.
+    vector<Texture> loadMaterialTextures(aiMaterial *mat, aiTextureType type, string typeName, bool fallback = false);
+};
+
+unsigned inline int TextureFromFile(const char *path, const string &directory, bool gamma = false);