Clean up of sandbox

* Added a statistics panel
* Added comments to `Sandbox.cpp`
* Moved utility functions and GUI code out of sandbox.cpp

BarinkEngine/BarinkEngine.cpp

@@ -1,5 +1,7 @@
 #include "BarinkEngine.h"
 #include <imgui.h>
+#include <chrono>
+
 
 extern void Start();
 extern void Update();
@@ -9,7 +11,20 @@ extern void Stop();
 using namespace BarinkEngine;
 
 
+struct EngineStatistics{
+	unsigned int lastSampleTime;
+	unsigned int  frames;
+	float frameTime;
+	unsigned int FPS;
+};
+
+EngineStatistics* ES;
+
+
 int main(int argc, char* argv[]) {
+	ES = new EngineStatistics();
+	ES->frames = 0;
+	ES->lastSampleTime = 0;
 
 	// Startup services 
 	BarinkWindow MainWindow =  BarinkWindow(800, 600);
@@ -24,8 +39,27 @@ int main(int argc, char* argv[]) {
 	// First call to setup game
 	Start();
 
+
+	ES->lastSampleTime = std::chrono::duration_cast<std::chrono::milliseconds> (std::chrono::system_clock::now().time_since_epoch()).count();
+	
 	// Runtime loop
 	while (!MainWindow.WindowShouldClose()) {
+
+		ES->frames++;
+
+		unsigned int  now = std::chrono::duration_cast<std::chrono::milliseconds> (std::chrono::system_clock::now().time_since_epoch()).count();
+		unsigned int MilliSecondsPast = ES->lastSampleTime - now;
+		
+		if ( MilliSecondsPast >= 1000) {
+			ES->FPS = 1000 / ES->frames ;
+			ES->frameTime =  ES->frames / 1000;
+			ES->frames = 0;
+			ES->lastSampleTime = now;
+		}
+
+
+
+
 		InputSystem.PollEvents();
 		
 		Update();
@@ -35,6 +69,8 @@ int main(int argc, char* argv[]) {
 		ImmediateGraphicsDraw();
 
 		GUISystem.Render();
+		
+
 
 		MainWindow.SwapBuffers();
 	}
@@ -45,9 +81,18 @@ int main(int argc, char* argv[]) {
 
 
 	// Shutdown Services
-	
+	delete ES;
 
 	return 0;
 }
 
 
+void ShowStats() {
+	ImGui::Begin("Statistics", false, ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove );
+
+	ImGui::Text("Frames: %i", ES->frames);
+	ImGui::Text("FPS: %i", ES->FPS);
+	ImGui::Text("Frame Time: %f", ES->frameTime);
+	ImGui::End();
+
+}

BarinkEngine/Include/BarinkEngine.h

@@ -16,6 +16,6 @@
 #include "Graphics/GUI/GUIManager.h"
 #include "Scene.h"
 
-void WARN(std::string message);
 
 
+void ShowStats();

BarinkEngine/graphics/shaders/fragment.shader

@@ -2,6 +2,8 @@
 
 out vec4 FragColor;
 
+uniform vec3 MatColour;
+
 void main(){
-	FragColor = vec4(0.5f, 0.5f, 0.0f , 1.0f);
+	FragColor = vec4(MatColour, 1.0f);
 }