Imported update to FrameRate

common/frame_rate.hpp

@@ -22,29 +22,27 @@
 #ifndef FRAMERATE_HPP_
 #define FRAMERATE_HPP_
 
-#include <ctime>
+#include <chrono>
 
 class FrameRate {
 public:
-	FrameRate() {
-		frameCount = lastFrameRate = tick = 0;
-	}
-	int Calculate() {
+	typedef std::chrono::high_resolution_clock Clock;
+
+	FrameRate() = delete;
+	static int Calculate() {
 		frameCount++;
-		if (clock() - tick >= CLOCKS_PER_SEC) {
+		if (Clock::now() - tick >= std::chrono::duration<int>(1)) {
 			lastFrameRate = frameCount;
 			frameCount = 0;
-			tick = clock();
+			tick = Clock::now();
 		}
 		return lastFrameRate;
 	}
-	int GetFrameRate() const {
-		return lastFrameRate;
-	}
+	static int GetFrameRate() { return lastFrameRate; }
 private:
-	int frameCount;
-	int lastFrameRate;
-	int tick;
+	static int frameCount;
+	static int lastFrameRate;
+	static Clock::time_point tick;
 };
 
 #endif