public UpdateTimer(long ticks, UpdateTimer.Type type, TimerEventHandler timeEventHandler = null)
{
Debug.Assert(ticks >= 0);
_ticksElapsed = 0;
_ticksUntilFire = ticks;
_ticksInPeriod = ticks;
_type = type;
_isRunning = true;
if (timeEventHandler != null)
{
TimerFired += timeEventHandler;
}
}
public void Play(bool randomStartFrame = false)
{
_index = (randomStartFrame ? _Random.Next(_keyFrames.Count) : 0);
_timer = new UpdateTimer(_keyFrames[_index].Duration, UpdateTimer.Type.Once, TimerFired);
_ticksToNextFrame = _keyFrames[_index].Duration.Ticks;
State = AnimationState.Playing;
}
private void PlayToNextFrame(long ticksElapsed)
{
Debug.Assert(ticksElapsed >= 0);
while (ticksElapsed >= _ticksToNextFrame && _index < _keyFrames.Count)
{
ticksElapsed -= _ticksToNextFrame;
if (++_index < _keyFrames.Count)
{
_ticksToNextFrame = _keyFrames[_index].Duration.Ticks;
}
}
if (_index < _keyFrames.Count)
{
_ticksToNextFrame -= ticksElapsed;
_timer = new UpdateTimer(_ticksToNextFrame, UpdateTimer.Type.Once, TimerFired);
}
else
{
Stop();
}
}
private void LoopToNextFrame(long ticksElapsed)
{
Debug.Assert(ticksElapsed >= 0);
while (ticksElapsed >= _ticksToNextFrame)
{
ticksElapsed -= _ticksToNextFrame;
_index = (_index + 1) % _keyFrames.Count;
_ticksToNextFrame = _keyFrames[_index].Duration.Ticks;
}
_ticksToNextFrame -= ticksElapsed;
_timer = new UpdateTimer(_ticksToNextFrame, UpdateTimer.Type.Once, TimerFired);
}
public UpdateTimer(TimeSpan period, UpdateTimer.Type type, TimerEventHandler timeEventHandler = null)
: this(period.Ticks, type, timeEventHandler)
{
}
