Add ImGui and refactor

src/main.cpp

@@ -2,16 +2,19 @@
 #include <GLFW/glfw3.h>
 #include <iostream>
 
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
+
 #include "scene.h"
 
 int main(){
-  if (!glfwInit()){
+  if (!glfwInit()) {
     std::cerr << "Failed to initialize GLFW" << std::endl;
     return -1;
   }
 
   GLFWwindow* window = glfwCreateWindow(800, 600, "TerraVisor", nullptr, nullptr);
-  if(!window){
+  if(!window) {
     std::cerr << "Failed to create GLFW window" << std::endl;
     glfwTerminate();
     return -1;
@@ -19,18 +22,31 @@ int main(){
 
   glfwMakeContextCurrent(window);
   glewExperimental = GL_TRUE;
-  if(glewInit() != GLEW_OK){
+  if(glewInit() != GLEW_OK) {
     std::cerr << "Failed to initialize GLEW" << std::endl;
     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);
+  while (!glfwWindowShouldClose(window)) {
     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

@@ -8,14 +8,20 @@
 
 #include "Scene.h"
 
-void Scene::DrawGUI(GLFWwindow* window){
+void Scene::DrawGUI(GLFWwindow* window) {
 }
 
-void Scene::Display(GLFWwindow* window){
+void Scene::Display(GLFWwindow* window) {
+    glClear(GL_COLOR_BUFFER_BIT);
+    glfwSwapBuffers(window);
 }
 
-void Scene::Idle(){
+void Scene::Idle() {
 }
 
-void Scene::Init(){
+void Scene::Init() {
+    glewInit();
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
 }