Automatically add Systems about engo

[matiwinnetou]

I would say this is ready advanced feature if ever to do. Our ECS at work doesn't even come close to this.

There is also element of magic with this so I would be really skeptical and overall I would be careful with this feature.

[paked]

I really would like this. I think it removes so much user error.

[EtienneBruines]

@paked do we want this for all (possibly user-defined) Systems, or just for the ones engi has? (i.e. RenderSystem, AudioSstem, ...)

[EtienneBruines]

Now that we have scenes, I think we could define some kind of AddDefaultSystem?

Usage:

engi.AddDefaultSystem(&engi.RenderSystem{})

And for each Scene that gets created, that same engi.RenderSystem could get reinitialized, without having to specify "I want a RenderSystem", for every Scene.

Downside

i.e. the RenderSystem is kinda state-dependent: it needs a list of Entitys to work with, and that changes from Scene to Scene. So maybe we need to work with some kind of initializer, of type func() Systemer or something.

engi.AddDefaultSystem(func() Systemer { return &engi.RenderSystem{} })

[paked]

@EtienneBruines I don't think this is worth it. We are leaving ourselves open to a lot of confusion IMO.

[paked]

This should be closed unless you have another idea.