Added IMGUI for debugging

src/DarkRP2D.cpp

@@ -1,10 +1,19 @@
 #include "DarkRP2D.h"
 
-#include <GL/gl.h>
+#ifndef NDEBUG
+	#include "imgui.h"
+	#include "imgui_impl_sdl_gl3.h"
+#endif
+
+#include <GL/glew.h>
 #include <iostream>
 
 DarkRP2D::~DarkRP2D() {
 	std::cout << "Game got destroyed!" << std::endl;
+	#ifndef NDEBUG
+		ImGui_ImplSdlGL3_Shutdown();
+    	ImGui::DestroyContext();
+	#endif
 	delete assets;
 	delete obj;
 	delete inputHandler;
@@ -37,6 +46,12 @@ void DarkRP2D::create () {
 	font = new BitmapFont("arial.ttf");
 
 	camera = new OrtographicCamera();
+	#ifndef NDEBUG
+		//Setup IMGUI debugging
+		ImGui::CreateContext();
+		ImGui_ImplSdlGL3_Init(this->gWindow);
+		ImGui::StyleColorsDark();
+	#endif
 }
 
 void DarkRP2D::loop(unsigned int delta) {
@@ -72,8 +87,17 @@ void DarkRP2D::update(unsigned int delta) {
 	//camera update
 }
 
+#ifndef NDEBUG
+bool show_demo_window = true;
+bool show_another_window = false;
+ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+#endif
+
 void DarkRP2D::render(unsigned int delta) {
 	renderer->clear();
+	#ifndef NDEBUG
+		ImGui_ImplSdlGL3_NewFrame(gWindow);
+	#endif
 
 	//Drawing
 	Shader defaultShader = assets->getShader("defaultShader");
@@ -85,6 +109,32 @@ void DarkRP2D::render(unsigned int delta) {
 	Shader bitmapShader = assets->getShader("bitmapShader");
 	font->drawText(bitmapShader, "Hallo du noob", 25.0f, 25.0f, 1.f, glm::vec3(0.5f,0.8f,0.2f));
 
+
+	#ifndef NDEBUG
+		// 1. Show a simple window.
+        // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
+        {
+            static float f = 0.0f;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
+            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
+        }
+
+
+		ImGui::Render();
+    	ImGui_ImplSdlGL3_RenderDrawData(ImGui::GetDrawData());
+	#endif
 	SDL_GL_SwapWindow(gWindow);
 }