feat: rework few fonctions and change glew to glad

- game files deleted

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "lib/glew"]
-	path = lib/glew
-	url = https://github.com/edoren/glew
 [submodule "lib/glm"]
 	path = lib/glm
 	url = https://github.com/g-truc/glm
@@ -10,3 +7,6 @@
 [submodule "lib/stb"]
 	path = lib/stb
 	url = https://github.com/nothings/stb.git
+[submodule "lib/glad"]
+	path = lib/glad
+	url = https://github.com/DawidLokiec/glad.git

CMakeLists.txt

@@ -6,6 +6,8 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 file(GLOB_RECURSE CPP_SOURCES CONFIGURE_DEPENDS src/*.cpp)
 file(GLOB_RECURSE CPP_HEADERS CONFIGURE_DEPENDS src/*.hpp)
+
+list(APPEND CPP_SOURCES lib/glad/src/glad.c)
 add_executable(main ${CPP_SOURCES} ${CPP_HEADERS})
 
 # GLFW
@@ -14,12 +16,8 @@ set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
 set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
 add_subdirectory(lib/glfw)
 
-# GLEW
-add_definitions(-DGLEW_STATIC)
-include_directories(lib/glew/include)
-add_library(glew STATIC lib/glew/src/glew.c)
-target_include_directories(glew PUBLIC lib/glew/include)
-target_compile_definitions(glew PRIVATE GLEW_STATIC)
+# GLAD
+target_include_directories(main PRIVATE lib/glad/include)
 
 # GLM
 target_include_directories(main PRIVATE lib/glm)
@@ -29,7 +27,7 @@ target_include_directories(main PRIVATE lib/stb)
 
 target_include_directories(main PRIVATE inc/)
 
-target_link_libraries(main PRIVATE glfw glew)
+target_link_libraries(main PRIVATE glfw)
 
 find_package(OpenGL REQUIRED)
 target_link_libraries(main PRIVATE OpenGL::GL)

inc/EBO.hpp

@@ -1,14 +1,17 @@
 #ifndef EBO_HPP
 #define EBO_HPP
 
-#include <GL/glew.h>
+#include <stddef.h>
+
+#include "glad/glad.h"
+
 
 class EBO
 {
-private:
+ private:
   GLuint id;
 
-public:
+ public:
   EBO(unsigned int* indices, size_t size);
   ~EBO();
 

inc/VAO.hpp

@@ -1,22 +1,26 @@
 #ifndef VAO_HPP
 #define VAO_HPP
 
-#include <gl/glew.h>
+#include <stddef.h>
+
+#include "glad/glad.h"
 
 class VAO
 {
-private:
+ private:
   unsigned int id;
 
-public:
+ public:
   VAO();
   ~VAO();
 
   void bind();
   void unbind();
 
-    void setAttributePointer(GLuint index, GLuint size, GLenum type, GLsizei stride, const void* offset);
-    void drawElement(GLenum mode, GLsizei count, GLenum type, const void *indices);
+  void setAttributePointer(GLuint index, GLuint size, GLenum type,
+                           GLsizei stride, const void* offset);
+  void drawElement(GLenum mode, GLsizei count, GLenum type,
+                   const void* indices);
   void drawArray(GLenum mode, GLint first, GLsizei count);
 };
 

inc/VBO.hpp

@@ -1,20 +1,21 @@
 #ifndef VBO_HPP
 #define VBO_HPP
 
-#include <gl/glew.h> 
+#include <stddef.h>
+
+#include "glad/glad.h"
 
 class VBO
 {
-private:
+ private:
   unsigned int id;
 
-public:
+ public:
   VBO(GLfloat* vertices, size_t size);
   ~VBO();
 
   void bind();
   void unbind();
-
 };
 
 #endif

inc/camera.hpp

@@ -1,12 +1,14 @@
 #ifndef CAMERA_HPP
 #define CAMERA_HPP
 
-#include <glfw/glfw3.h>
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
+#include "glm/glm.hpp"
+#include "glm/gtc/matrix_transform.hpp"
 
-class Camera {
-private:
+struct GLFWwindow;
+
+class Camera
+{
+ private:
   int screenWidth;
   int screenHeight;
 
@@ -28,7 +30,7 @@ private:
   void processMouseMovement();
   void updateCameraVectors();
 
-public:
+ public:
   Camera(int width, int height, GLFWwindow* window, float sensitivity);
 
   void update(float deltaTime);

inc/cube.hpp

@@ -1,16 +1,18 @@
 #ifndef CUBE_HPP
 #define CUBE_HPP
 
-#include "vbo.hpp"
+#include <stddef.h>
+
+#include "camera.hpp"
 #include "ebo.hpp"
-#include "vao.hpp"
 #include "shader.hpp"
 #include "texture.hpp"
-#include "camera.hpp"
+#include "vao.hpp"
+#include "vbo.hpp"
 
 class Cube
 {
-private:
+ private:
   VBO vbo;
   EBO ebo;
   VAO vao;
@@ -19,7 +21,7 @@ private:
   Shader shader;
   Texture texture;
 
-public:
+ public:
   Cube(Camera &camera);
   void loop(int width, int height);
 };

inc/game.hpp

@@ -1,29 +0,0 @@
-#ifndef GAME_HPP
-#define GAME_HPP
-
-#include "GLFW/glfw3.h"
-#include <string>
-
-using namespace std;
-
-class Game
-{
-private:
-  int         width;
-  int         height;
-  const char *name;
-  GLFWwindow *window;
-
-public:
-  Game(int width, int height, string name);
-  ~Game();
-
-  void run(bool (*func)(Game *g));
-
-  GLFWwindow *getWindow();
-  const char *getName();
-  int getWidth();
-  int getHeight();
-};
-
-#endif

inc/shader.hpp

@@ -1,14 +1,11 @@
 #ifndef SHADER_HPP
 #define SHADER_HPP
 
-#include <gl/glew.h>
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtc/type_ptr.hpp>
+#include "glad/glad.h"
 
 class Shader
 {
-private:
+ private:
   GLuint vertexShader;
   GLuint fragmentShader;
   GLuint shaderProgram;
@@ -17,7 +14,7 @@ private:
   void addFragShader(const char* fragmentShaderSource);
   void compileInProgram();
 
-public:
+ public:
   Shader(const char* vertexShaderSource, const char* fragmentShaderSource);
   ~Shader();
 

inc/texture.hpp

@@ -1,7 +1,7 @@
 #ifndef TEXTUTE_HPP
 #define TEXTUTE_HPP
 
-#include <GL/glew.h>
+#include "glad/glad.h"
 #include <string>
 
 class Texture

src/EBO.cpp

@@ -1,4 +1,4 @@
-#include "EBO.hpp"
+#include "ebo.hpp"
 
 EBO::EBO(unsigned int* indices, size_t size)
 {
@@ -7,17 +7,8 @@ EBO::EBO(unsigned int* indices, size_t size)
   glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, indices, GL_STATIC_DRAW);
 }
 
-EBO::~EBO()
-{
-    glDeleteBuffers(1, &id);
-}
+EBO::~EBO() { glDeleteBuffers(1, &id); }
 
-void EBO::bind()
-{
-    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id);
-}
+void EBO::bind() { glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id); }
 
-void EBO::unbind()
-{
-    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
-}
+void EBO::unbind() { glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); }

src/VAO.cpp

@@ -1,33 +1,23 @@
-#include "VAO.hpp"
+#include "vao.hpp"
 
-VAO::VAO()
-{
-    glGenVertexArrays(1, &id);
-}
+VAO::VAO() { glGenVertexArrays(1, &id); }
 
-VAO::~VAO()
-{
-    glDeleteVertexArrays(1, &id);
-}
+VAO::~VAO() { glDeleteVertexArrays(1, &id); }
 
-void VAO::bind()
-{
-    glBindVertexArray(id);
-}
+void VAO::bind() { glBindVertexArray(id); }
 
-void VAO::unbind()
-{
-    glBindVertexArray(0);
-}
+void VAO::unbind() { glBindVertexArray(0); }
 
-void VAO::setAttributePointer(GLuint index, GLuint size, GLenum type, GLsizei stride, const void* offset)
+void VAO::setAttributePointer(GLuint index, GLuint size, GLenum type,
+                              GLsizei stride, const void* offset)
 {
   bind();
   glEnableVertexAttribArray(index);
   glVertexAttribPointer(index, size, type, GL_FALSE, stride, offset);
 }
 
-void VAO::drawElement(GLenum mode, GLsizei count, GLenum type, const void* indices)
+void VAO::drawElement(GLenum mode, GLsizei count, GLenum type,
+                      const void* indices)
 {
   bind();
   glDrawElements(mode, count, type, indices);

src/VBO.cpp

@@ -1,4 +1,4 @@
-#include "VBO.hpp"
+#include "vbo.hpp"
 
 VBO::VBO(GLfloat* vertices, size_t size)
 {
@@ -7,17 +7,8 @@ VBO::VBO(GLfloat* vertices, size_t size)
   glBufferData(GL_ARRAY_BUFFER, size, vertices, GL_STATIC_DRAW);
 }
 
-VBO::~VBO()
-{
-    glDeleteBuffers(1, &id);
-}
+VBO::~VBO() { glDeleteBuffers(1, &id); }
 
-void VBO::bind()
-{
-    glBindBuffer(GL_ARRAY_BUFFER, id);
-}
+void VBO::bind() { glBindBuffer(GL_ARRAY_BUFFER, id); }
 
-void VBO::unbind()
-{
-    glBindBuffer(GL_ARRAY_BUFFER, 0);
-}
+void VBO::unbind() { glBindBuffer(GL_ARRAY_BUFFER, 0); }

src/camera.cpp

@@ -1,5 +1,8 @@
 #include "camera.hpp"
 
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
 Camera::Camera(int width, int height, GLFWwindow* window, float sensitivity)
     : screenWidth(width),
       screenHeight(height),
@@ -15,6 +18,7 @@ Camera::Camera(int width, int height, GLFWwindow* window, float sensitivity)
       firstMouse(true)
 {
   glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+  updateCameraVectors();
 }
 
 void Camera::update(float deltaTime)
@@ -47,10 +51,9 @@ void Camera::processInput(float deltaTime)
     cameraPosition -= cameraUp * velocity;
 
   // Zoom
-    if (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS)
-        fov = 35.0f;
-    else
-        fov = 45.0f;
+  fov = (glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS)
+            ? 35.f
+            : 45.f;
 }
 
 void Camera::processMouseMovement()
@@ -58,7 +61,8 @@ void Camera::processMouseMovement()
   double mouseX, mouseY;
   glfwGetCursorPos(window, &mouseX, &mouseY);
 
-    if (firstMouse) {
+  if (firstMouse)
+  {
     mousePosX = mouseX;
     mousePosY = mouseY;
     firstMouse = false;

src/cube.cpp

@@ -1,5 +1,7 @@
 #include "cube.hpp"
-#include "VAO.hpp"
+
+#include "glm/gtc/type_ptr.hpp"
+#include "vao.hpp"
 #include "vbo.hpp"
 
 GLfloat cubeVertices[] = {
@@ -124,8 +126,8 @@ const char* cubeFragShader = R"(
     }
 )";
 
-Cube::Cube(Camera &camera) :
-  vbo(cubeVertices, sizeof(cubeVertices)),
+Cube::Cube(Camera& camera)
+    : vbo(cubeVertices, sizeof(cubeVertices)),
       ebo(cubeIndices, sizeof(cubeIndices)),
       texture("stone.png"),
       camera(camera),
@@ -134,11 +136,11 @@ Cube::Cube(Camera &camera) :
   vao.bind();
   vbo.bind();
 
-  GLsizei stride = 8*sizeof(float);
+  GLsizei stride = 8 * sizeof(float);
 
   vao.setAttributePointer(0, 3, GL_FLOAT, stride, (void*)0);
-  vao.setAttributePointer(1, 3, GL_FLOAT, stride, (void*)(3*sizeof(float)));
-  vao.setAttributePointer(2, 2, GL_FLOAT, stride, (void*)(6*sizeof(float)));
+  vao.setAttributePointer(1, 3, GL_FLOAT, stride, (void*)(3 * sizeof(float)));
+  vao.setAttributePointer(2, 2, GL_FLOAT, stride, (void*)(6 * sizeof(float)));
 
   ebo.bind();
 }
@@ -148,13 +150,10 @@ void Cube::loop(int width, int height)
   shader.use();
   glActiveTexture(GL_TEXTURE0);
 
-  glm::vec3 coordinate = glm::vec3(0.0f, -1.0f, 0.0f);
+  glm::vec3 coordinate = glm::vec3(0.0f, 0.0f, -1.0f);
   glm::mat4 projection = glm::perspective(
       glm::radians(camera.fov),
-    static_cast<float>(width) / static_cast<float>(height), 
-    0.1f, 
-    100.0f
-  );
+      static_cast<float>(width) / static_cast<float>(height), 0.1f, 100.0f);
 
   GLint texLoc = glGetUniformLocation(shader.getProgram(), "material.diffuse");
   glUniform1i(texLoc, 0);
@@ -163,16 +162,13 @@ void Cube::loop(int width, int height)
   glUniformMatrix4fv(projectionLoc, 1, GL_FALSE, glm::value_ptr(projection));
 
   GLint viewLoc = glGetUniformLocation(shader.getProgram(), "view");
-  glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(camera.getViewMatrix()));
+  glUniformMatrix4fv(viewLoc, 1, GL_FALSE,
+                     glm::value_ptr(camera.getViewMatrix()));
 
   glm::mat4 model = glm::translate(glm::mat4(1.0f), coordinate);
   GLint modelLoc = glGetUniformLocation(shader.getProgram(), "model");
   glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
 
-  vao.drawElement(
-    GL_TRIANGLES, 
-    sizeof(cubeIndices) / sizeof(unsigned int), 
-    GL_UNSIGNED_INT, 
-    0
-  );
+  vao.drawElement(GL_TRIANGLES, sizeof(cubeIndices) / sizeof(unsigned int),
+                  GL_UNSIGNED_INT, 0);
 }

src/game.cpp

@@ -1,87 +0,0 @@
-#include "GL/glew.h"
-#include "game.hpp"
-#include "GLFW/glfw3.h"
-#include <cstdlib>
-#include <iostream>
-
-
-Game::Game(int width, int height, string name) : 
-  width(width), 
-  height(height), 
-  name(name.c_str())
-{
-  if(glfwInit() == GLFW_FALSE)
-    std::cerr << "error glfw" << std::endl;
-  
-  this->window = glfwCreateWindow(
-    this->width,
-    this->height,
-    this->name, 
-    nullptr, 
-    nullptr
-  );
-
-  // OpenGL 3.3
-  glfwWindowHint(GLFW_VERSION_MAJOR, 3);
-  glfwWindowHint(GLFW_VERSION_MINOR, 3);
-  
-  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-  
-  glfwWindowHint(GLFW_DEPTH_BITS, 24);
-  glfwWindowHint(GLFW_STENCIL_BITS, 8);
-
-  glfwWindowHint(GLFW_SAMPLES, 4);
-  glfwMakeContextCurrent(this->window);
-
-  glewInit();
-
-  glEnable(GL_DEPTH_TEST); 
-  glEnable(GL_MULTISAMPLE);
-}
-
-void Game::run(bool (*func)(Game *g))
-{
-  while(func(this))
-  {
-    glfwGetWindowSize(this->window, &this->width, &this->height);
-    glViewport(0, 0, this->width, this->height);
-
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-    glClearColor(0.5f, 0.2f, 0.2f, 1.0f);
-
-    glDisable(GL_MULTISAMPLE);
-    glfwPollEvents();
-    glfwSwapBuffers(this->window);
-
-    GLenum error = glGetError();
-    if (error != glGetError())
-    {
-      std::cerr << error << std::endl;
-      exit(1);
-    }
-  }
-}
-
-Game::~Game()
-{
-  glfwTerminate();
-}
-
-GLFWwindow *Game::getWindow()
-{
-  return this->window;
-}
-const char *Game::getName()
-{
-  return this->name;
-}
-
-int Game::getWidth()
-{
-  return this->height;
-}
-
-int Game::getHeight()
-{
-  return this->width;
-}

src/main.cpp

@@ -1,16 +1,98 @@
-#define STB_IMAGE_IMPLEMENTATION
-#include "stb_image.h"
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
 
-#include "game.hpp"
+#include <cstdlib>
+#include <iostream>
+
+#include "camera.hpp"
+#include "cube.hpp"
+
+static void glfwErrorCallback(int error, const char *description)
+{
+  std::cerr << "GLFW Error " << error << ": " << description << std::endl;
+}
 
 int main()
 {
-    Game game(800, 600, "game");
+  const char *title = "window";
+  int width = 800, height = 600;
 
-    auto quit = [](Game *g) {
-      return !glfwWindowShouldClose(g->getWindow());
-    };
+  glfwSetErrorCallback(glfwErrorCallback);
 
-    game.run(quit);
+  if (glfwInit() == GLFW_FALSE)
+  {
+    std::cerr << "ERROR(GLFW): initialisation error" << std::endl;
+    exit(EXIT_FAILURE);
+  }
+
+  // OpenGL 3.3
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+  glfwWindowHint(GLFW_DEPTH_BITS, 24);
+  glfwWindowHint(GLFW_STENCIL_BITS, 8);
+  glfwWindowHint(GLFW_SAMPLES, 4);
+#ifdef __APPLE__
+  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+
+  GLFWwindow *window = glfwCreateWindow(width, height, title, nullptr, nullptr);
+  if (window == nullptr)
+  {
+    std::cerr
+        << "ERROR: Failed to create GLFW window with requested GL version."
+        << std::endl;
+    glfwTerminate();
+    exit(EXIT_FAILURE);
+  }
+
+  glfwMakeContextCurrent(window);
+
+  if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+  {
+    std::cerr << "ERROR: Failed to initialize GLAD" << std::endl;
+    glfwDestroyWindow(window);
+    glfwTerminate();
+    exit(EXIT_FAILURE);
+  }
+
+  glfwSwapInterval(1);
+
+  Camera camera(width, height, window, 0.1f);
+  Cube cube{camera};
+
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_MULTISAMPLE);
+
+  double deltaTime = 0.f;
+  double lastTime = glfwGetTime();
+  while (!glfwWindowShouldClose(window))
+  {
+    glfwGetFramebufferSize(window, &width, &height);
+    glViewport(0, 0, width, height);
+
+    glClearColor(0.5f, 0.2f, 0.2f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    double currentTime = glfwGetTime();
+    deltaTime = currentTime - lastTime;
+    lastTime = currentTime;
+
+    camera.update(deltaTime);
+    cube.loop(width, height);
+
+    glfwPollEvents();
+    glfwSwapBuffers(window);
+
+    GLenum error = glGetError();
+    if (error != GL_NO_ERROR)
+    {
+      std::cerr << error << std::endl;
+      // exit(1);
+    }
+  }
+
+  glfwDestroyWindow(window);
+  glfwTerminate();
   return 0;
 }

src/shader.cpp

@@ -36,17 +36,8 @@ void Shader::compileInProgram()
   glDeleteShader(fragmentShader);
 }
 
-Shader::~Shader()
-{
-    glDeleteProgram(shaderProgram);
-}
+Shader::~Shader() { glDeleteProgram(shaderProgram); }
 
-void Shader::use() const
-{
-    glUseProgram(shaderProgram);
-}
+void Shader::use() const { glUseProgram(shaderProgram); }
 
-GLuint Shader::getProgram() const
-{
-    return shaderProgram;
-}
+GLuint Shader::getProgram() const { return shaderProgram; }

src/texture.cpp

@@ -1,6 +1,7 @@
 #include "texture.hpp"
-#include <iostream>
+
 #include <filesystem>
+#include <iostream>
 
 #define STB_IMAGE_IMPLEMENTATION
 #include "stb_image.h"
@@ -25,7 +26,8 @@ Texture::Texture(const std::string& filename)
 
   int imgW, imgH, numColCh;
   stbi_set_flip_vertically_on_load(true);
-    unsigned char* data = stbi_load(path.string().c_str(), &imgW, &imgH, &numColCh, 0);
+  unsigned char* data =
+      stbi_load(path.string().c_str(), &imgW, &imgH, &numColCh, 0);
 
   if (!data)
   {
@@ -45,16 +47,14 @@ Texture::Texture(const std::string& filename)
 
   GLenum format = (numColCh == 4) ? GL_RGBA : GL_RGB;
 
-    glTexImage2D(GL_TEXTURE_2D, 0, format, imgW, imgH, 0, format, GL_UNSIGNED_BYTE, data);
+  glTexImage2D(GL_TEXTURE_2D, 0, format, imgW, imgH, 0, format,
+               GL_UNSIGNED_BYTE, data);
   glGenerateMipmap(GL_TEXTURE_2D);
 
   stbi_image_free(data);
 }
 
-Texture::~Texture()
-{
-    glDeleteTextures(1, &id);
-}
+Texture::~Texture() { glDeleteTextures(1, &id); }
 
 void Texture::bind(GLenum textureUnit) const
 {
@@ -62,7 +62,4 @@ void Texture::bind(GLenum textureUnit) const
   glBindTexture(GL_TEXTURE_2D, id);
 }
 
-unsigned int Texture::getID() const
-{
-    return id;
-}
+unsigned int Texture::getID() const { return id; }