If I’ve understood correctly, the “object” must be a reference to that specific object I want to cast to, but I don’t really understand what to put there to cast from one actor BP to another. In my case, I want to open a door when I press a button. I have a BP_Button and BP_Door (both actor blueprints).
This is what my BP_Button looks like. I am struggling to understand what to put as “object” in the cast node.
in order to Cast<T> on an object we need to get the Object to be cast. there are a number of ways to do this, and each one varies on complexity, redundancy, and other design choices
you can utilize an overlap collider where on Overlaps
lets say the Door tests for like a Player with a collider in the beginOverlap() it would Cast the Other Actor to the BP_Player then set a variable in the BP_Player to say “there is something to interact with” or " there is a Door that can be opened" along with somehow registering itself to the BP_Player. then the Player “does a thing” which fire off in your case the OpenDoor()
let say the Player have a collider that looks for interactables (in this case Doors) then when there is something inside that collider that can Cast to an Interactable, the Player can then issue a command to Interact() on that interactable (in this case OpenDoor())
another method is to utilize Traces of some kind, whether that be Line Trace, or Sphere trace
when the player hits the command a trace is performed then you go through the results and try to cast it to the given type to then call a given function on it.
there are other methods utilizing managers, but these can get very complex for moderate amounts of positives unless your design needs such.
