UpdateFrameCount method
Implementation
void UpdateFrameCount(double now, [String extra = ""]) {
_frames++;
if ((now - _lastSample) < _SAMPLE_RATE_MS) return;
double fps = _frames * 1000.0 / _SAMPLE_RATE_MS;
//print("${fps}");
_frames = 0;
_lastSample = now;
_text.text = fps.toStringAsFixed(2) + " fps";
_extra.innerHtml = extra;
AddRawValue(_graphHeight * fps.ceil() ~/ _maxFps);
}