Add ImGui and refactor

src/main.cpp

@@ -2,6 +2,9 @@
 #include <GLFW/glfw3.h>
 #include <iostream>
 
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
+
 #include "scene.h"
 
 int main(){
@@ -24,13 +27,26 @@ int main(){
     return -1;
   }
 
+  Scene::Init();
+
+  //Init ImGui
+  IMGUI_CHECKVERSION();
+  ImGui::CreateContext();
+  ImGui_ImplGlfw_InitForOpenGL(window, true);
+  ImGui_ImplOpenGL3_Init("#version 150");
+  
   while (!glfwWindowShouldClose(window)) {
-    glClear(GL_COLOR_BUFFER_BIT);
     Scene::Idle();
-    glfwSwapBuffers(window);
+    Scene::Display(window);
+    
     glfwPollEvents();
   }
 
+  // Cleanup ImGui
+  ImGui_ImplOpenGL3_Shutdown();
+  ImGui_ImplGlfw_Shutdown();
+  ImGui::DestroyContext();
+
   glfwDestroyWindow(window);
   glfwTerminate();
   return 0;

src/scene.cpp

@@ -12,10 +12,16 @@ void Scene::DrawGUI(GLFWwindow* window){
 }
 
 void Scene::Display(GLFWwindow* window) {
+    glClear(GL_COLOR_BUFFER_BIT);
+    glfwSwapBuffers(window);
 }
 
 void Scene::Idle() {
 }
 
 void Scene::Init() {
+    glewInit();
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
 }