/// <summary>
/// Update the GameTimer and process events
/// Called by the TimerManager by defualt
///
/// Advanced: With the owner called update model, the owner must call this explicitly in its update
/// </summary>
public bool Update()
{
Debug.Assert(this.seconds >= 0.0);
double elapsedTime = 0;
if (this.clock == ClockType.WallClock)
{
elapsedTime = Time.WallClockTotalSeconds - startTime;
}
else
{
elapsedTime = Time.GameTimeTotalSeconds - startTime;
}
bool elapsed = elapsedTime >= seconds;
if (elapsed)
{
this.state = State.Elapsed;
GameTimerManager.DetachTimer(this);
if (TimerElapsed != null)
{
TimerElapsed(this);
}
}
return(elapsed);
}
/// <summary>
/// Starts the timer
///
/// Advanced: should not be called for owner called update model
/// </summary>
public void Start()
{
this.state = State.Running;
// If starting for the first time, just grab the current time.
startTime = clock == ClockType.WallClock ? Time.WallClockTotalSeconds : Time.GameTimeTotalSeconds;
GameTimerManager.AttachTimer(this);
}
/// <summary>
/// Restarts the timer but resets the start time based on the previous start time.
/// This prevents errors from accumulating since timeout values don't sync perfectly
/// with frame times.
/// </summary>
/// <param name="sync">If sync is true, we want to restart the timer in such a way as to take the previous start time into account. If sync is false, we want to just start from "now".</param>
public void ReStart(bool sync)
{
this.state = State.Running;
// Need to adjust start time so that it is in range (curTime - seconds, curTime]
double curTime = clock == ClockType.WallClock ? Time.WallClockTotalSeconds : Time.GameTimeTotalSeconds;
if (sync)
{
while (startTime <= curTime)
{
startTime += seconds;
}
startTime -= seconds;
}
else
{
startTime = curTime;
}
GameTimerManager.AttachTimer(this);
}
/// <summary>
/// Stops the timer
///
/// Advanced: should not be called for owner called update model
/// </summary>
public void Stop()
{
this.state = State.Paused;
GameTimerManager.DetachTimer(this);
}