Update and Implement Model class

FinalProject/mesh.h

@@ -27,5 +27,5 @@ public:
     inline VertexArrayObject vao() const { return _vao; }
 
 public:
-    void render(ShaderProgram shader);
+    void render(const ShaderProgram& shader) const ;
 };

FinalProject/model.cpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "logger.h"
 #include "model.h"
 
 Model::Model(std::string path) {
@@ -8,13 +9,136 @@ Model::Model(std::string path) {
     loadModel(path);
 }
 
+Model::~Model() {
+    // TODO: Maybe delete all meshes?
+}
+
 void Model::loadModel(std::string path) {
     Assimp::Importer importer;
     const aiScene* scene = importer.ReadFile(
         path, aiProcess_Triangulate | aiProcess_FlipUVs);
     
     if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) {
-        std::cout << "ERROR::ASSIMP::" << importer.GetErrorString() << std::endl;
+        Logger::error("Failed to load model: " + std::string(importer.GetErrorString()));
+        _status = ERROR;
         return;
     }
+    _directory = path.substr(0, path.find_last_of('/'));
+    
+    processNode(scene->mRootNode, scene);
+}
+
+void Model::processNode(aiNode* node, const aiScene* scene) {
+    // Process all meshes in node
+    for (unsigned int i = 0; i < node->mNumMeshes; i++) {
+        aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
+        _meshes.push_back(processMesh(mesh, scene));
+    }
+    
+    // Recursively process child nodes
+    for (unsigned int i = 0; i < node->mNumChildren; i++) {
+        processNode(node->mChildren[i], scene);
+    }
+}
+
+Mesh Model::processMesh(aiMesh* mesh, const aiScene* scene) {
+    std::vector<Vertex> vertices;
+    std::vector<unsigned int> indices;
+    std::vector<Texture> textures;
+
+    // Process vertices
+    for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
+        // Create placeholder vectors
+        glm::vec3 vertexPosition = glm::vec3(0.0f);
+        glm::vec3 vertexNormal = glm::vec3(0.0f);
+        glm::vec2 vertexTextureCoordinate = glm::vec2(0.0f);
+        
+        // Process vertex positions
+        vertexPosition.x = mesh->mVertices[i].x;
+        vertexPosition.y = mesh->mVertices[i].y;
+        vertexPosition.z = mesh->mVertices[i].z;
+
+        // Process vertex normals
+        if (mesh->mNormals) {
+            vertexNormal.x = mesh->mNormals[i].x;
+            vertexNormal.y = mesh->mNormals[i].y;
+            vertexNormal.z = mesh->mNormals[i].z;
+        }
+
+        // Process vertex texture coordinates
+        if (mesh->mTextureCoords[0]) {
+            vertexTextureCoordinate.x = mesh->mTextureCoords[0][i].x;
+            vertexTextureCoordinate.y = mesh->mTextureCoords[0][i].y;
+        }
+        else {
+            vertexTextureCoordinate = glm::vec2(0.0f, 0.0f);
+        }
+
+        // Create new vertex
+        Vertex newVertex = {
+            vertexPosition,
+            vertexNormal,
+            vertexTextureCoordinate
+        };
+
+        // Add vertex to vertices
+        vertices.push_back(newVertex);
+    }
+
+    // Process indices
+    for (unsigned int i = 0; i < mesh->mNumFaces; i++) {
+        aiFace face = mesh->mFaces[i];
+        for (unsigned int j = 0; j < face.mNumIndices; j++) {
+            indices.push_back(face.mIndices[j]);
+        }
+    }
+
+    // Process material
+    if (mesh->mMaterialIndex >= 0) {
+        aiMaterial* material = scene->mMaterials[mesh->mMaterialIndex];
+
+        // Diffuse maps
+        std::vector<Texture> diffuseMaps = loadMaterialTextures(material, aiTextureType_DIFFUSE, TextureType::DIFFUSE);
+        textures.insert(textures.end(), diffuseMaps.begin(), diffuseMaps.end());
+
+        // Specular maps
+        std::vector<Texture> specularMaps = loadMaterialTextures(material, aiTextureType_SPECULAR, TextureType::SPECULAR);
+        textures.insert(textures.end(), specularMaps.begin(), specularMaps.end());
+    }
+
+    return Mesh(vertices, indices, textures);
+}
+
+std::vector<Texture> Model::loadMaterialTextures(aiMaterial* mat, aiTextureType type, TextureType textureType) {
+    std::vector<Texture> textures;
+    for (unsigned int i = 0; i < mat->GetTextureCount(type); i++) {
+        aiString str;
+        mat->GetTexture(type, i, &str);
+        bool skip = false;
+        for (unsigned int j = 0; j < _texturesLoaded.size(); j++) {
+            if (std::strcmp(_texturesLoaded[j].path().data(), str.C_Str()) == 0) {
+                textures.push_back(_texturesLoaded[j]);
+                skip = true;
+                break;
+            }
+        }
+        if (!skip) {
+            Texture newTexture(textureType, _directory + '/' + str.C_Str());
+            textures.push_back(newTexture);
+            _texturesLoaded.push_back(newTexture);
+        }
+    }
+    return textures;
+}
+
+void Model::render(const ShaderProgram& shader) const {
+    // Test for model status
+    if (_status != LOADED) {
+        Logger::error("Trying to render unloaded model");
+        return;
+    }
+    // Render the model
+    for (unsigned int i = 0; i < _meshes.size(); i++) {
+        _meshes[i].render(shader);
+    }
 }

FinalProject/model.h

@@ -10,23 +10,28 @@
 #include "shader.h"
 
 class Model {
+public:
+    enum MODELSTATUS { LOADING, LOADED, ERROR};
+
 private:
-    std::vector<Mesh*> _meshes;
+    std::vector<Mesh> _meshes;
+    std::vector<Texture> _texturesLoaded;
     std::string _directory;
-    bool _ready = false;
+    MODELSTATUS _status = LOADING;
 
 public:
     Model(std::string path);
+    ~Model();
 
 public:
-    inline bool isReady() const { return _ready; }
+    inline MODELSTATUS isReady() const { return _status; }
 
 private:
     void loadModel(std::string path);
     void processNode(aiNode* node, const aiScene* scene);
-    Mesh* processMesh(aiMesh* mesh, const aiScene* scene);
-    std::vector<Texture> loadMaterialTextures(aiMaterial* mat, aiTextureType type, std::string typeName);
+    Mesh processMesh(aiMesh* mesh, const aiScene* scene);
+    std::vector<Texture> loadMaterialTextures(aiMaterial* mat, aiTextureType type, TextureType textureType);
 
 public:
-    void render(ShaderProgram shader);
+    void render(const ShaderProgram& shader) const;
 };

FinalProject/texture.h

@@ -1,15 +1,22 @@
 #pragma once
 
+#include <string>
+
 enum TextureType { DIFFUSE, SPECULAR };
 
 class Texture {
 private:
     unsigned int _id;
     TextureType _type;
+    std::string _path;
 
 public:
-    unsigned int id() const;
-    TextureType type() const;
+    Texture(TextureType type, std::string path);
+
+public:
+    inline unsigned int id() const { return _id; }
+    inline TextureType type() const { return _type; }
+    inline std::string path() const { return _path; }
 
     inline void bind() const;
     inline void unbind() const;