added imgui to the template

source/main.cpp

@@ -2,19 +2,30 @@
 #include <GLFW/glfw3.h>
 #include <iostream>
 
+// ImGui includes
+#include "imgui/imgui.h"
+#include "imgui/imgui_impl_glfw.h"
+#include "imgui/imgui_impl_opengl3.h"
+
 // Callback to resize the viewport when the window is resized
 void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
-    (void)window; // Unused parameter
+	(void)window; // Unused parameter
 	glViewport(0, 0, width, height);
 }
 
 int main() {
 	// 1. Initialize GLFW
 	glfwInit();
+    // Set OpenGL version to 3.3 Core Profile - For MacOS, you may need to uncomment the next line
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
+#ifdef __APPLE__
+    const char* glsl_version = "#version 330";
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // Required on Mac
+#endif
+
 	// 2. Create the Window
 	GLFWwindow *window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
 	if (window == NULL) {
@@ -26,27 +37,59 @@ int main() {
 	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
 	// 3. Initialize GLAD (Load function pointers)
-	if (!gladLoadGLLoader(reinterpret_cast<GLADloadproc>(glfwGetProcAddress))){
+	if (!gladLoadGLLoader(reinterpret_cast<GLADloadproc>(glfwGetProcAddress))) {
 		std::cout << "Failed to initialize GLAD" << std::endl;
 		return -1;
 	}
 
+	// --- ImGui Setup Start ---
+	IMGUI_CHECKVERSION();
+	ImGui::CreateContext();
+	ImGuiIO &io = ImGui::GetIO();
+	(void)io;
+
+	// Setup Dear ImGui style
+	ImGui::StyleColorsDark();
+	// ImGui::StyleColorsLight();
+
+	// Setup Platform/Renderer backends
+	ImGui_ImplGlfw_InitForOpenGL(window, true);
+	ImGui_ImplOpenGL3_Init(glsl_version);
+
 	// 4. The Render Loop
 	while (!glfwWindowShouldClose(window)) {
 		// Input
 		if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
 			glfwSetWindowShouldClose(window, true);
 
+        // --- ImGui Frame Start ---
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplGlfw_NewFrame();
+        ImGui::NewFrame();
+
+        // Create a simple window
+        ImGui::Begin("Settings");
+        ImGui::Text("Hello from Dear ImGui!");
+        ImGui::End();
+        // --- ImGui Frame End ---
+
 		// Rendering commands here
-		glClearColor(0.2f, 0.3f, 0.3f, 1.0f); // Set clear color (Teal)
+		glClearColor(0.01f, 0.01f, 0.01f, 1.0f); // Set clear color (Dark Gray)
 		glClear(GL_COLOR_BUFFER_BIT);         // Clear the screen
 
+        ImGui::Render();
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
 		// Swap buffers and poll IO events
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 	}
 
 	// 5. Clean up
+
+    ImGui_ImplOpenGL3_Shutdown();
+    ImGui_ImplGlfw_Shutdown();
+    ImGui::DestroyContext();
 	glfwTerminate();
 	return 0;
 }