Feature Request - System:excludes() about lovetoys

[Nukesor]

I just opened a new branch and wrote the exclude logic for engine:checkRequirements: #72

Anyway this feature request isn't as easy as it looked like.
I think we need to rewrite some parts of the Entity assignment functionality inside the engine for this feature. The biggest problem I see right now is the componentRemoved functionality.
The initial assignment of Entities for Systems with exclude should already be working, but this needs some testing.

[raffomania]

Interesting, how would this differ from not including "ExcludedComponent" in System:requires()?

[Nukesor]

In case you got an Entity with ['CompA', 'CompB', 'CompC']. Now there is a System which requires ['CompA', 'CompB'], but doesn't want Entities with CompC.
This is actually a good idea, but we never encountered a scenario, where we needed this.

[Ander456]

wow, happend to see this repo, good job guys. the 'ecs' is what i want , i just want to use this framework to develop my game , ew... how can i communicate with you guys? like a gorup ?

[hbiblia]

If instead of doing an: excludes, it is better to create operators something like "!" .

! = Select all entities with one of these.

function MoveSystem:requires()
      return {"position", "!velocity"}
 end

It would also be good to change requires by filter

[raffomania]

I think the most flexible solution here would be to add a new method like requiresEntity that gets passed one entity at a time, returning a boolean that indicates whether this entity is required by this system or not.