public virtual void OnTick(bool systemTick, bool skipDay = false)
{
// No ticks allowed if simulation is shutting down.
if (IsClosing)
{
return;
}
// Sends commands if queue has any.
InputManager?.OnTick(systemTick, skipDay);
// Back buffer for only sending text when changed.
SceneGraph?.OnTick(systemTick, skipDay);
// Changes game Windows and state when needed.
WindowManager?.OnTick(systemTick, skipDay);
// Rolls virtual dice.
Random?.OnTick(systemTick, skipDay);
// System tick is from execution platform, otherwise they are linear simulation ticks.
if (systemTick)
{
_currentTickTime = DateTime.UtcNow;
var elapsedTicks = _currentTickTime.Ticks - _lastTickTime.Ticks;
var elapsedSpan = new TimeSpan(elapsedTicks);
// Check if more than an entire second has gone by.
if (!(elapsedSpan.TotalMilliseconds > TICK_INTERVAL))
{
return;
}
// Reset last tick time to current time for measuring towards next second tick.
_lastTickTime = _currentTickTime;
// Recursive call on ourselves to process non-system ticks.
OnTick(false, skipDay);
}
else
{
// Increase the total seconds ticked.
TotalSecondsTicked++;
// Fire event for first tick when it occurs, and only then.
if (TotalSecondsTicked == 1)
{
OnFirstTick();
}
// Visual representation of ticking for debugging purposes.
TickPhase = _spinningPixel.Step();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:TrailGame.SimulationApp" /> class.
/// </summary>
protected SimulationApp()
{
// We are not closing...
IsClosing = false;
// Date and time the simulation was started, which we use as benchmark for all future time passed.
_lastTickTime = DateTime.UtcNow;
_currentTickTime = DateTime.UtcNow;
// Visual tick representations for other sub-systems.
TotalSecondsTicked = 0;
// Setup spinning pixel to show game is not thread locked.
_spinningPixel = new SpinningPixel();
TickPhase = _spinningPixel.Step();
// Create modules needed for managing simulation.
Random = new Randomizer();
WindowManager = new WindowManager(this);
SceneGraph = new SceneGraph(this);
// Input manager needs event hook for knowing when buffer is sent.
InputManager = new InputManager(this);
}