init

shared/UtilsFPS.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <assert.h>
+#include <stdio.h>
+
+class FramesPerSecondCounter
+{
+public:
+  explicit FramesPerSecondCounter(float avgInterval = 0.5f)
+  : avgInterval_(avgInterval)
+  {
+    assert(avgInterval > 0.0f);
+  }
+
+  bool tick(float deltaSeconds, bool frameRendered = true)
+  {
+    if (frameRendered)
+      numFrames_++;
+
+    accumulatedTime_ += deltaSeconds;
+
+    if (accumulatedTime_ > avgInterval_) {
+      currentFPS_ = static_cast<float>(numFrames_ / accumulatedTime_);
+      if (printFPS_)
+        printf("FPS: %.1f\n", currentFPS_);
+      numFrames_       = 0;
+      accumulatedTime_ = 0;
+      return true;
+    }
+
+    return false;
+  }
+
+  inline float getFPS() const { return currentFPS_; }
+
+  bool printFPS_ = true;
+
+public:
+  float avgInterval_ = 0.5f;
+  unsigned int numFrames_  = 0;
+  double accumulatedTime_  = 0;
+  float currentFPS_        = 0.0f;
+};