// Updated to do all calculations in this worker thread and to do UI updates that happen inside of this on the UI thread
public void RunSimFrame(ThreadPoolTimer tpt)
{
const double tick = 1.0 / FrameRate; // UI seconds
const int reportingInterval = 10 * (int)FrameRate;
// Added check to see if the previous frame is still calculating/rendering when this method gets called by the timer
// Sufficiently large scenarios (size varies depending on the PC) can take longer than a frame tick to run
// When this happens a frame is dropped and we wait until the next tick to check again
// Waiting an entire frame also gives the XAML/UWP rendering tasks time to finish before they are fired again
// The amount of rendering work is proportional to the amount of calculation work, so this all works out
if (frameInProgress)
{
framesDropped++;
}
else
{
frameInProgress = true;
sim.Step(tick, simRunning);
frameInProgress = false;
framesRendered++;
if ((framesRendered % reportingInterval) == 0)
{
Debug.WriteLine("Frames rendered = {0}, dropped = {1}, dropped pct = {2:F2}", framesRendered, framesDropped,
100.0 * (float)framesDropped / (float)(framesRendered + framesDropped));
}
}
}
