Events

There are a variety of events on World and Entity you can use.

Events that occur on component add or entity creation are invoked after IInitable.Init is invoked.

Events that occur on component remove or entity deletion are invoked after IDestroyable.Destroy is invoked.

This ensures that component states viewed through events are valid.

Generic Events

Generic delegates in C# cannot be unbounded. You cannot have am unbound entity.OnComponentAdded += (Entity e, T component) => { } event for example.

We get around this problem with the IGenericAction<Entity>.Invoke<T>(Entity param, ref T type); interface.

Frent provides generic events in the form of Entity.OnComponentRemovedGeneric and Entity.OnComponentAddedGeneric.