How to know when a Level Sequence has finished playing?

Development Cinematics & Media
, ,
17

Here’s my solution using coroutines. I needed a way to find out when a looping level sequence has reached the end of the timeline, and unfortunately the OnFinished and OnStop delegates don’t fire if the sequence is looping.

UE5Coro::TCoroutine<> USequencerTask::StartSequenceTimer()
{
	// ensure the delegate never fires more than once per loop
	bool bHasBroadcast = false;
	
	while (IsValid(SequencePlayer) && SequencePlayer->IsPlaying())
	{
		const float CurrentTime = SequencePlayer->GetCurrentTime().AsSeconds();
		const float EndTime = SequencePlayer->GetEndTime().AsSeconds();

		if (bHasBroadcast && CurrentTime <= 0.1)
		{
			bHasBroadcast = false;
		}
		
		if (!bHasBroadcast && CurrentTime >= EndTime - 0.1f)
		{
			OnSequencePlayerLoop.Broadcast();
			bHasBroadcast = true;
		}

		co_await UE5Coro::Latent::NextTick();
	}
	co_return;
}