♻️ (engine, Mesh3D): refactor 3D object handling

- Introduce Mesh3D class with vertices, texture, VBO/VAO.
- Replace Object3D struct and textures map in engine with Mesh3D objects.
- Update createObject to load from file path instead of vertex array.
- Adjust cube rendering to use new vertex count.
- Remove debug prints from Texture2D loading.
- Toggle fragment shader color vs texture usage.

assets/models/b.obj

@@ -0,0 +1,34 @@
+# Vertices
+v -0.500000 -0.500000 -0.500000
+v 0.500000 -0.500000 -0.500000
+v 0.500000 0.500000 -0.500000
+v -0.500000 0.500000 -0.500000
+v -0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 0.500000
+v 0.500000 0.500000 0.500000
+v -0.500000 0.500000 0.500000
+
+# Texture Coordinates
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+
+# Faces
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
+f 5/1 6/2 7/3
+f 7/3 8/4 5/1
+
+f 8/2 4/3 1/4
+f 1/4 5/1 8/2
+
+f 7/2 6/3 2/4
+f 2/4 3/1 7/2
+
+f 1/4 2/3 6/2
+f 6/2 5/1 1/4
+
+f 4/4 3/3 7/2
+f 7/2 8/1 4/4

assets/shaders/fragment.glsl

@@ -6,6 +6,6 @@ uniform sampler2D ourTexture;
 
 void main()
 {
-    //FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
-    FragColor = texture(ourTexture, TexCoord);
+    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+    //FragColor = texture(ourTexture, TexCoord);
 }

include/Mesh3D.h

@@ -1,6 +1,7 @@
 #ifndef _MESH3D
 #define _MESH3D
 
+#include "Texture2D.h"
 #include <vector>
 #include <string>
 
@@ -8,10 +9,14 @@ namespace djalim {
 
   class Mesh3D {
     public:
-      // Constructor
+      Mesh3D();
       Mesh3D(const std::string& filepath);
       std::vector<float> meshVertices;
+      int numMeshVertices = 0;
       void loadOBJFile(const std::string& filepath);
+      Texture2D texture;
+      GLuint VBO;
+      GLuint VAO;
   };
 }
 

include/engine.h

@@ -6,8 +6,10 @@
 #include "ShaderProgram.h"
 #include "Texture2D.h"
 #include <map>
+#include <sstream>
 #include <string>
 #include <vector>
+#include "Mesh3D.h"
 
 #define NBCALLBACKS 1
 
@@ -19,7 +21,7 @@ struct Object3D {
   GLuint VAO;
 };
 
-typedef std::map<std::string,Object3D> Objects3D;
+typedef std::map<std::string,djalim::Mesh3D> Objects3D;
 
 static bool gWireframe = false;
 
@@ -37,7 +39,6 @@ namespace djalim {
       double previousSeconds = 0.0;
       double elapsedSeconds;
       int frameCount = 0;
-      std::map<std::string,Texture2D> textures;
       ShaderProgram shaderProgram;
 
       Objects3D objects;
@@ -49,7 +50,7 @@ namespace djalim {
 
       void onUpdate();
       void loadHints();
-      void createObject(std::string name, std::string textures, std::vector<float>& vertices);
+      void createObject(std::string name, std::string textures, std::string filepath);
       void loadCallbacks();
       void showFps();
       void onCreate();

src/core/Mesh3D.cpp

@@ -25,6 +25,8 @@ struct objFace {
 
 
 
+djalim::Mesh3D::Mesh3D(){}
+
 djalim::Mesh3D::Mesh3D(const std::string& filepath) {
   loadOBJFile(filepath);
 }
@@ -54,6 +56,7 @@ void djalim::Mesh3D::loadOBJFile(const std::string& filepath){
       //std::cout << "found vertice: (" << x << ", " << y << ", " << z << ")" << std::endl;
       objVertex v = {x, y, z};
       vertices.push_back(v);
+      numMeshVertices++;
     }
     else if (type == "vn"){
       float x, y, z;
@@ -70,8 +73,8 @@ void djalim::Mesh3D::loadOBJFile(const std::string& filepath){
       vertexTexture.push_back(vt);
     }
     else if (type == "f"){
-      std::cout << "found face" << std::endl;
-      std::cout << ss.str() << std::endl;
+      // std::cout << "found face" << std::endl;
+      // std::cout << ss.str() << std::endl;
       objFace face;
       // TODO Find a more elegant way to do this
       for (int i = 0; i < 3; i++){

src/core/Texture2D.cpp

@@ -21,8 +21,8 @@ bool Texture2D::loadTexture(const std::string& filename, bool generateMipmaps) {
         return false;
     }
 
-    std::cout << "Texture loaded successfully: " << filename << std::endl;
-    std::cout << "Width: " << width << ", Height: " << height << ", Components: " << components << std::endl;
+    //std::cout << "Texture loaded successfully: " << filename << std::endl;
+    //std::cout << "Width: " << width << ", Height: " << height << ", Components: " << components << std::endl;
 
     glGenTextures(1, &mTexture);
     glBindTexture(GL_TEXTURE_2D, mTexture);

src/core/engine.cpp

@@ -1,4 +1,5 @@
 #include "engine.h"
+#include "Mesh3D.h"
 #include <cstdlib>
 #include <iostream>
 #include <vector>
@@ -41,11 +42,14 @@ djalim::OpenGlEngine::OpenGlEngine(const char* title, int width, int height) {
 }
 
 
-void djalim::OpenGlEngine::createObject(std::string name, std::string textures, std::vector<float>& vertices){
+void djalim::OpenGlEngine::createObject(std::string name, std::string textures, std::string filepath){
   
-  objects[name];
+  
+  Mesh3D obj = Mesh3D(filepath);
+  
+  objects[name] = obj;
 
-  bool textureLoaded = objects[name].texture.loadTexture(textures);
+  bool textureLoaded = obj.texture.loadTexture(textures);
   
   if (!textureLoaded) {
     std::cerr << "Failed to load " << name << " texture!" << std::endl;
@@ -64,10 +68,8 @@ void djalim::OpenGlEngine::createObject(std::string name, std::string textures,
 
   //glBindBuffer(GL_ARRAY_BUFFER, VBO);
   glBindBuffer(GL_ARRAY_BUFFER, objects[name].VBO);
-
-
-  std::cout << "Loading 3D objects with "<< vertices.size() << " vertices"<< std::endl;
-  glBufferData(GL_ARRAY_BUFFER, sizeof(float)*vertices.size(), vertices.data(), GL_STATIC_DRAW);
+  
+  glBufferData(GL_ARRAY_BUFFER, sizeof(float)*obj.meshVertices.size(), obj.meshVertices.data(), GL_STATIC_DRAW);
   
   // Attribut de position
   glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);

src/loops/cube.cpp

@@ -49,7 +49,7 @@ void djalim::cube(GLFWwindow* window, djalim::ShaderProgram shader, Objects3D& o
     shader.setUniform("projection", projection); // Assurez-vous que setUniform pour mat4 est implémenté
 
     // Matrice de Vue
-    glm::mat4 view = glm::lookAt(glm::vec3(0.0f, 0.0f, 3.0f), // Position caméra
+    glm::mat4 view = glm::lookAt(glm::vec3(0.0f, 0.0f, 9.0f), // Position caméra
         glm::vec3(0.0f, 0.0f, 0.0f), // Cible
         glm::vec3(0.0f, 1.0f, 0.0f)); // Axe Haut
     shader.setUniform("view", view);
@@ -61,7 +61,7 @@ void djalim::cube(GLFWwindow* window, djalim::ShaderProgram shader, Objects3D& o
 
     // Dessiner le cube
     glBindVertexArray(objects["cube"].VAO);
-    glDrawArrays(GL_TRIANGLES, 0, 36);
+    glDrawArrays(GL_TRIANGLES, 0, objects["cube"].numMeshVertices*3);
 
     //std::cout << objects["cube"].VAO << std::endl;
 

src/main.cpp

@@ -4,8 +4,7 @@
 #include "Mesh3D.h"
 
 int main() {
-  //djalim::OpenGlEngine engine = djalim::OpenGlEngine("Mon app", 800, 600);
-  //engine.start();
-  djalim::Mesh3D mesh = djalim::Mesh3D("../assets/models/UTAH_BLEND.obj");
+  djalim::OpenGlEngine engine = djalim::OpenGlEngine("Mon app", 800, 600);
+  engine.start();
   return 0;
 }

src/onCreate.cpp

@@ -48,7 +48,7 @@ void djalim::OpenGlEngine::onCreate(){
     };
 
     stbi_set_flip_vertically_on_load(true);
-    createObject("cube", "../assets/textures/prof.png", vertices);
+    createObject("cube", "../assets/textures/prof.png", "../assets/models/UTAH_BLEND.obj");
     
     // textures["cube"] = Texture2D();
     // bool textureLoaded = textures["cube"].loadTexture("../assets/textures/prof.png");