public AWGame(GraphicsDeviceService graphicsDeviceService)
{
GraphicsDeviceService = graphicsDeviceService;
Services = new GameServiceContainer();
if (graphicsDeviceService != null) Services.AddService(typeof(IGraphicsDeviceService), graphicsDeviceService);
Components = new AWGameComponentCollection();
GameTime = new AWGameTime();
_framerateTimer = new AWTimer(() => GameTime.TotalRealTime, TimeSpan.FromSeconds(1)) { SkipPastIntervals = true };
_frameDrawTimes = new RunningSequenceTimeSpan(TimeSpan.FromSeconds(1));
_frameDrawStopwatch = new Stopwatch();
}
/// <summary>
/// Called when the game has determined that game logic needs to be processed.
/// </summary>
public void Update(AWGameTime gameTime)
{
GameTime = gameTime;
foreach (var item in Components)
if (item.Enabled) item.Update();
UpdateImpl();
}
private void GameUpdateAndDrawLoopImpl()
{
_invoker(() =>
{
try
{
_game.Initialize();
_game.BeginRun();
}
catch (Exception e)
{
_exceptionHandler(e);
}
});
var totalGameTime = TimeSpan.Zero;
_timer.Start();
if (Initialized != null)
{
Initialized();
Initialized = null;
}
_readyForNextUpdateAndDraw = true;
while (!_exiting)
{
lock (_timer)
{
var now = _timer.Elapsed;
if (!IsTimeForNextUpdate)
{
// It's not yet time for update.
Waiter.Instance.Sleep(_nextUpdate - now);
}
else if (now > _nextUpdate + TimeSpan.FromSeconds(10))
{
// Update is lagging a lot; skip over the missed updates.
_nextUpdate = now;
}
else if (_readyForNextUpdateAndDraw)
{
var updateInterval = AssaultWingCore.TargetElapsedTime;
var gameTime = new AWGameTime(totalGameTime, updateInterval, now);
_nextUpdate += updateInterval;
totalGameTime += updateInterval;
_readyForNextUpdateAndDraw = false;
_updateAndDraw(gameTime);
}
else
{
// We didn't make it in time for a frame update. Wait for a while and try again.
Waiter.Instance.Sleep(TimeSpan.FromMilliseconds(5));
}
}
}
}
