RetriggerableDelay — delay that resets if triggered again

UKismetSystemLibrary::RetriggerableDelay. Latent.

DoOnce

Lets execution through once, then blocks subsequent attempts until Reset is called. Useful for one-shot triggers.

SetActorTickEnabled — enable or disable Tick for this actor

EnableInput — allow this actor to receive input events

Must call EnableInput(GetPlayerController(0)) before BindAction/BindAxis events fire on the actor.

Overlap trigger: detect player entering a zone and do something once

Pattern: EventActorBeginOverlap → CastTo<BP_Character>(Object=OtherActor) → Cast Succeeded → DoOnce → [your action here]. Key pins: EventActorBeginOverlap outputs 'OverlappedActor' and 'OtherActor'. CastTo input is 'Object', exec outputs are 'Cast Succeeded' and 'Cast Failed'. DoOnce exec output is 'Completed'.

UnPossess — detach Controller from currently possessed Pawn

Pressure plate trigger that activates when enough weight is on it

Pattern: BoxCollision trigger, variable OverlappingActors(int)=0. OnBeginOverlap: OverlappingActors++ → Branch(OverlappingActors >= RequiredCount) → Activate. OnEndOverlap: OverlappingActors-- → Branch(OverlappingActors < RequiredCount) → Deactivate. Use interface or event dispatcher to notify connected actors (doors, platforms).

Delegate

A type-safe function pointer used by Event Dispatchers and bindings. Bind, broadcast, unbind.

MapRangeUnclamped — remap value from one range to another, unclamped

SetTimerByEvent — set timer that fires a custom event delegate

K2_SetTimerDelegate. Safer than FunctionName version. Create delegate from custom event.