Don't know what is in this one

include/util.hpp

@@ -0,0 +1,31 @@
+#pragma once
+#include <SFML/Graphics.hpp>
+
+struct fps_counter {
+public:
+		fps_counter(){
+				if(!f.loadFromFile("../assets/fonts/Arial.ttf")){
+						std::cout << "couldn't find the fallback Arial font "
+								         "in ../assets/fonts/" << std::endl;
+				} else {
+						t.setFont(f);
+				}
+		}
+
+		void frame(double delta_time){
+				frame_count++;
+				fps_average += (delta_time - fps_average) / frame_count;
+		}
+		
+		void draw(sf::RenderWindow *r){
+				t.setString(std::to_string(fps_average));
+				r->draw(t);
+		}
+
+private:
+		sf::Font f;
+		sf::Text t;
+		int frame_count = 0;
+		double fps_average = 0;
+};
+