/// <summary>Updates whatever needs updating.</summary>
/// <param name="gameTime">Time passed since the last call to Update.</param>
protected override void Update(GameTime gameTime)
{
// For graph data.
_watch.Restart();
// Update the rest of the game.
base.Update(gameTime);
// Get ingame stats, if a game is running.
IManager manager = null;
if (_server != null)
{
manager = _server.Controller.Simulation.Manager;
_gameSpeedHistory.Put(_server.Controller.ActualSpeed);
_gameLoadHistory.Put(_server.Controller.CurrentLoad);
}
else if (_client != null && _client.Controller.Session.ConnectionState == ClientState.Connected)
{
manager = _client.Controller.Simulation.Manager;
_gameSpeedHistory.Put(_client.Controller.ActualSpeed);
_gameLoadHistory.Put(_client.Controller.CurrentLoad);
}
if (manager != null)
{
_componentsHistory.Put(manager.ComponentCount);
}
// Update the audio engine if we have one (setting one up can cause
// issues on some systems, so we have to check, because in case we
// failed it will be null).
if (_audioEngine != null)
{
_audioEngine.Update();
}
// Post-update disposable of game components that were removed
// from our the components list.
foreach (var component in _pendingComponents)
{
var disposable = component as IDisposable;
if (disposable != null)
{
(disposable).Dispose();
}
}
_pendingComponents.Clear();
// Grab actual graph data.
_watch.Stop();
_updateHistory.Put(1000 * _watch.ElapsedTicks / (float)Stopwatch.Frequency);
}
/// <summary>This is called when the game should draw itself.</summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
// For graph data.
_watch.Restart();
// Fixes funny error messages due to buggy XNA, e.g. when restoring
// from a minimized state. At least I couldn't reproduce it since
// this line is in... I claim this to be XNA's fault because of this:
// http://xboxforums.create.msdn.com/forums/t/76414.aspx
GraphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
// Clear screen.
GraphicsDevice.Clear(Color.Black);
// Draw world elements if we're in a game.
if (_client != null)
{
_client.Controller.Draw((float)gameTime.ElapsedGameTime.TotalMilliseconds);
}
// Draw other stuff (GUI for example).
base.Draw(gameTime);
// Collect graph data.
_fpsHistory.Put(1 / (float)gameTime.ElapsedGameTime.TotalSeconds);
_memoryHistory.Put(GC.GetTotalMemory(false));
// Draw some debug info on top of everything.
DrawDebugInfo();
// Grab actual graph data.
_watch.Stop();
_drawHistory.Put(1000 * _watch.ElapsedTicks / (float)Stopwatch.Frequency);
// Draw graphs after everything else, to avoid filters on the
// other screen data to affect us.
if (GraphsVisible)
{
_fpsGraph.Draw();
_updateGraph.Draw();
_drawGraph.Draw();
_memoryGraph.Draw();
_componentGraph.Draw();
_gameSpeedGraph.Draw();
_gameLoadGraph.Draw();
}
}
/// <summary>Process data to build actual data points to draw the graph through, in relative values.</summary>
/// <returns></returns>
private void BuildCurves()
{
// Clear previous results.
_points.Clear();
// Skip if there is no data.
if (_enumerator == null)
{
_min = _max = _average = _now = 0;
return;
}
// Initialize values to impossible values to override them.
_min = float.PositiveInfinity;
_max = float.NegativeInfinity;
_now = float.NaN;
// And start the average at zero, of course.
_average = 0;
var count = 0;
// Start walking over our data source.
var processed = 0;
_enumerator.Reset();
while (_enumerator.MoveNext())
{
var data = _enumerator.Current;
// Build average based on smoothing parameter.
_movingAverage.Put(data);
var value = (float)_movingAverage.Mean();
if (++processed > Smoothing)
{
// Store value in our data point list.
_points.Add(value);
// Update our extrema.
if (value < _min)
{
_min = value;
}
if (value > _max)
{
_max = value;
}
_average += value;
++count;
_now = data;
}
}
// Adjust maximum.
if (FixedMaximum.HasValue)
{
_recentMax = FixedMaximum.Value;
}
else if (!float.IsInfinity(_max))
{
if (_max > _recentMax)
{
_recentMax = MathHelper.Lerp(_recentMax, _max, 0.1f);
}
else
{
_recentMax = MathHelper.Lerp(_recentMax, _max, 0.01f);
}
}
// Scale curve to fit in the graphing area.
for (int i = 0, j = _points.Count; i < j; i++)
{
_points[i] /= _recentMax;
}
// Adjust average.
_average /= count;
}