HorizonTween Plugin: on the fly tweening animation for UE4

[dorgon_chang]

@renardmf

Hello,

I was trying to find the best way to play a tween in c++. I am currently using the CreateTweenEventWithParameter method but using the callback documentation to trigger the tween inside a function. I was trying to store the tweenevent in a variable but it seems like I have to call the CreateTweenEvent everytime to get it to play. Is there a more straightforward way to trigger the same tween over and over again?

Also, what is the best way to chain tweens? Can I just call another one on the onfinished callback of the first tween?

Thanks in advance.

hi,

Tween event is designed in fire and forget pattern, HorizonTweenSystem will delete any finished tween events.

if you want to reuse tween event, you can:

1. Set NumOfLoop to 0(so it never finish and deleted by tween system)
2. In OnTweenLoop callback, call UHorizonTweenEvent::Stop() or UHorizonTweenEvent::Pause().
3. When you want to start the tween, you can call UHorizonTweenEvent::Play() or UHorizonTweenEvent::Resume() to replay tween.

>>Also, I was wondering the best way to chain tweens together. Since I basically am trying to fade up and fade down an effect once the other tween is finished.

I think you can chain those event in one of these callback:
OnTweenStartNative
OnTweenUpdateNative
OnTweenLoopNative
OnTweenFinishedNative
ex:
TweenList[0]->OnTweenLoopNative.AddLambda([TweenList](UHorizonTweenEvent* InTweenEvent)
{
TweenList[0]->Stop();
TweenList[1]->Start();
}
);

Or you can write another Manager to arrange dependencies of your tween events.