private void UpdatePerfStats() { double time = _ShaderRenderer.GetElapsedTime(); perf1.Content = "Elapsed Time : " + time.ToString() + "s"; perf2.Content = "Rays / sec : " + (int)(time == 0 ? 0 : _ShaderRenderer.GetRayCount() / time); perf3.Content = "Samples / pixel : " + _ShaderRenderer.GetFrameCount(); }