Best practice for run some sequence of actions (analogue of coroutines)?

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1

Roughly speaking, I’m looking for an analogue of Unity coroutines so that it looks good, instead of having to check in update every time.

My current example: you need to move the player from point A to point B in a certain time when it is triggered by an input.

Thoughts:

  1. A separate script with update and startMove method that will turn on and off (enabled/disabled)?
  2. Subscription to the global update event and accumulation of a local variable? (I believe more in this option).

Does anyone have better ideas or critiques of mine?

2

Something like that. Is this an effective approach?

Mover.prototype.startStep = function(direction){
    if(this.stepStatus != 0) return;
    this.fromPos = this.entity.getPosition();
    this.toPos = direction.add(this.fromPos);
    console.log('startStep from ', this.fromPos, ' to ', this.toPos);
    this.app.on("main:update", this.onStep, this);
};

Mover.prototype.onStep = function(dt){ 
    this.stepStatus += dt / this.stepTime;
    if(this.stepStatus < 1)
    {
        this.currentPos.lerp(this.fromPos, this.toPos, this.stepStatus);
    }
    else 
    {
        console.log('stepEnd');
        this.currentPos = this.toPos;
        this.app.off("main:update", this.onStep, this);
        this.stepStatus = 0;
    };
    this.entity.setPosition(this.currentPos);
};
3

I personally interpolate vectors only if I need to control the interpolation step in a way that Tween library doesn’t allow. In most other cases I find using Tween is sufficient to move/rotate an entity from state A to state B. You can also chain tweens.

4

I considered this functionality, but left it for the reasons that I did not see how it is possible, for example, to control several components at the same time (without duplicating). Therefore, I fixed in my mind that Tween is more for animations, and it is better to write gameplay logic with other tools.

Am I fundamentally or slightly wrong somewhere?