Is there a way to execute code when a Tween or Sequence starts?

[ZedDevStuff]

I'm making an animator and i have some specific events that can't we tweened because it makes no sense (i.e changing the sprite of a GameObject, running some code at a specific time etc).
Is there any way to achieve this? Or will i have to create my own system to handle those? (I already have a good idea of how to do that)

[KyryloKuzyk]

This question is closely tied to the one about animation caching: #88

Animation caching is possible with PrimeTween as described in the link above, but that's not a recommended way of playing animations. Instead, a simpler approach is to create an animation at the exact moment you need it. So if you do it the recommended way, then the question about OnStart() callback goes away because you can just call a method right before you start the animation:

DoSomethingBeforeAnimation();
Tween.Position(...);

But if you still want to go in the path of caching animations, then you can chain a callback before other animations in a Sequence. This will have the same effect as DOTween's OnStart() callback:

var seq = Sequence.Create()
    .ChainCallback(() => DoSomethingBeforeAnimation())
    .Chain(Tween.Position(...))
seq.isPaused = true; // unpausing the animation later will call the DoSomethingBeforeAnimation() before starting animation

[ZedDevStuff]

Thank you very much! Honestly i have no idea what approach is better for what I'm doing (something like Just Shapes and Beats or Project Arrhythmia) so I'll probably try both and compare them