adding fps display

Application/FpsCounter.cpp

@@ -0,0 +1,22 @@
+#include <FpsCounter.h>
+#include <chrono>
+
+FpsCounter::FpsCounter()
+{
+	m_past = std::chrono::high_resolution_clock::now();
+	m_now = m_past;
+}
+
+void FpsCounter::Update()
+{
+	using namespace std::chrono_literals;
+	m_now = std::chrono::high_resolution_clock::now();
+
+	if(std::chrono::duration_cast<std::chrono::seconds>(m_now - m_past) >= 1s)
+	{
+		m_past = m_now;
+		m_current_fps = m_counter;
+		m_counter = 0;
+	}
+	m_counter++;
+}