Time

- Added Timer
- Added DeltaTimer

Engine/src/Engine/Core/Application.cpp

@@ -11,6 +11,8 @@
 
 #include "UserInterface/UserInterface.h"
 
+#include "Time/Timer.h"
+
 #include <filesystem>
 
 namespace Light {
@@ -40,11 +42,24 @@ namespace Light {
 		// reveal window
 		m_Window->SetVisibility(true);
 
+		DeltaTimer deltaTimer;
+		Timer timer;
+		int frames = 0;
+
 		//** GAMELOOP **//
 		while (!m_Window->IsClosed())
 		{
 			// update layers
-			m_LayerStack.OnUpdate(60.0f / 10000.0f); // #todo: implement time
+			m_LayerStack.OnUpdate(deltaTimer.GetDeltaTime());
+
+			frames++;
+			if (timer.GetElapsedTime() > 1.0f)
+			{
+				LT_ENGINE_INFO(frames);
+
+				frames = 0;
+				timer.Reset();
+			}
 
 			// render layers
 			m_Window->GetGfxContext()->GetRenderer()->BeginFrame();
@@ -57,6 +72,9 @@ namespace Light {
 
 			// poll events
 			m_Window->PollEvents();
+
+			/// update delta time
+			deltaTimer.Update();
 		}
 	}
 

Engine/src/Engine/Time/Timer.cpp

@@ -0,0 +1,13 @@
+#include "ltpch.h"
+#include "Timer.h"
+
+namespace Light {
+
+	void DeltaTimer::Update()
+	{
+		auto current = std::chrono::steady_clock::now();
+		m_DeltaTime = ((std::chrono::duration_cast<std::chrono::milliseconds>(current - m_Previous)).count()) / 1000.0f;
+		m_Previous = current;
+	}
+
+}

Engine/src/Engine/Time/Timer.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "Base.h"
+
+#include <chrono>
+
+namespace Light {
+
+	class Timer
+	{
+	private:
+		std::chrono::time_point<std::chrono::steady_clock> m_Start;
+
+	public:
+		Timer() : m_Start(std::chrono::steady_clock::now()) { }
+
+		inline float GetElapsedTime() const { return (std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_Start).count()) / 1000.; }
+
+		inline void Reset() { m_Start = std::chrono::steady_clock::now(); }
+	};
+
+	class DeltaTimer
+	{
+	private:
+		std::chrono::time_point<std::chrono::steady_clock> m_Previous;
+
+		float m_DeltaTime = 60.0f / 1000.0f;
+
+	public:
+		DeltaTimer(): m_Previous(std::chrono::steady_clock::now()) { }
+
+		void Update();
+
+		inline float GetDeltaTime() const { return m_DeltaTime; }
+	};
+
+}