User data for hitboxes

[ufrshubham]

I was wondering if it would be a good idea to add an userData property to hitboxes which then gets passed down to the collision callbacks. This would be similar to Fogre2d's user data.

Current implementation provides other as the immediate parent casted to PositionComponent. This works for most cases, but when using CompositeHitbox, other turns out to be CompositeHitbox instead of the actual parent.

[spydon]

I'm not a big fan of user data that is untyped, but the thing with the CompositeHitbox is a bug so good that you discovered that! You can of course already get the real parent by just calling .parent on the CompositeHitbox as a work around meanwhile.

[ufrshubham]

Yeah, I am using .parent for now. Was going to report it as an issue but wanted to confirm if we just want to fix it for CompositeHitbox, or do we want to go the userData way. But I agree that adding untyped is not worth it. I'll open an issue for the CompositeHitbox later.