feat: added FPS counter to terminal

PerformanceAnalyser.hpp

@@ -0,0 +1,40 @@
+#include <GL/glew.h>
+#include <cmath>
+#include <iostream>
+
+class PerformanceAnalyser {
+  private:
+    double lastFrameTime = 0;
+    int frameCount = 0;
+    double timeAcc = 0;
+    double lastFps = 0;
+
+  public:
+    PerformanceAnalyser(int framesToAcc = 10, bool autoPrint = true)
+        : framesToAcc(framesToAcc), autoPrint(autoPrint) {};
+
+    int framesToAcc;
+    bool autoPrint;
+
+    int getFPS() { return lastFps; }
+
+    void update(float time) {
+
+        timeAcc += (time - lastFrameTime);
+        lastFrameTime = time;
+        frameCount++;
+
+        if (frameCount == framesToAcc) {
+
+            lastFps = double(framesToAcc) / timeAcc;
+
+            if (autoPrint) {
+                std::cout << "Fps: " << std::round(lastFps * 10.0) * 0.1 << "\n"
+                          << std::flush;
+            }
+
+            frameCount = 0;
+            timeAcc = 0;
+        }
+    }
+};