Adding a way to observe adding, setting, and removing components.

Describe your Feature

A way to observe changes to entities within the world. The entities ECSOnAdd, ECSOnSet, and ECSOnRemove already exist for this feature request's purpose.

Implementation

Marcus said it would be used like this: Observer(Transform):event(OnAdd):on(function(entity, transform) end)

Considerations

Some questions that need to be answered include the following:

Will old code break in response to this feature? Nope.
What are the performance impacts with this feature (if any)? I doubt much performance impacts are expected to occur.
How is it useful to include? Extremely.

Ukendio / jecs

Adding a way to observe adding, setting, and removing components. #83

Describe your Feature

Implementation

Considerations