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Why does my FTimeline only tick twice?

I assigned a delegate, called TimelineDeal, to call after each timeline tick but this delegate only gets called twice. I am calling TickTimeline() in the actor's tick. My timeline is set to play for 4 seconds, but whether it's 4 seconds or 4000 seconds, the result is the same. Considering the timeline should tick every time the actor's tick is called, I don't know why it would stop after 2 times. Here is my code:

.h

  FTimeline TDeal;
  FOnTimelineEvent TDealUpdate;
  int32 TimelineDealCounter;

.cpp

  ASCard::ASCard(const FObjectInitializer& ObjectInitializer)
  {
       PrimaryActorTick.bCanEverTick = true;
       TDeal = FTimeline();
       TimelineDealCounter = 0;
       ...
  }

  void ASCard::Tick(float DeltaTime)
  {
       TDeal.TickTimeline(DeltaTime);
  }

  void ASCard::Dealing()
  {
       TDealUpdate.BindUFunction(this, FName("TimelineDeal"));
       TDeal.SetTimelinePostUpdateFunc(TDealUpdate);
       TDeal.SetLooping(false);
       TDeal.SetTimelineLength(4.f);

       TDeal.PlayFromStart();
  }

  void ASCard::TimelineDeal()
  {
       TimelineDealCounter++;
       GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::FromInt(TimelineDealCounter));
       ...
  }

Dealing() is called on this actor from my GameMode class.

Product Version: UE 4.8
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asked Jul 09 '15 at 01:52 AM in C++ Programming

avatar image

Kochab
554 59 164 125

avatar image Kochab Jul 11 '15 at 07:00 PM

This may have something to do with it, but I still don't see how it would be getting called more than twice in one frame, given that it's only called once in tick.

https://youtu.be/wutqpyDKnCQ?t=7m50s

avatar image pusheax Jul 11 '15 at 08:59 PM

Tried checking GetPlaybackPosition this two times?

avatar image Kochab Jul 13 '15 at 08:22 PM

The only way I can get it to continuously play is by adding:

  TDeal.Play(); 

at the top of TimelineDeal(). However, doing this seems to make it ignore the length. It will just run forever. It also seems redundant to add TDeal.Play() considering I already set it to PlayFromStart().

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