Button

A clickable UMG widget. Hook OnClicked in the Graph to handle the press.

OnComponentHit — hit event on specific component

EventHit — fires when actor is hit by or hits something

Requires Simulation Generates Hit Events on physics body.

WasInputKeyJustPressed — true only on the frame the key was pressed

EnhancedInputAction — Enhanced Input system action event

K2Node_EnhancedInputAction. ActionValue type depends on InputAction (Bool, Float, Axis2D, Axis3D). Triggers: Started, Ongoing, Triggered, Completed, Canceled.

SetActorTickInterval — change how often Tick fires

TickInterval=0.0 means every frame. TickInterval=0.1 means 10 times per second. Great for AI or non-critical logic that doesn't need per-frame updates.

Mouse click to world: detect clicked actor or ground position

On Left Mouse Button pressed → GetHitResultUnderCursorByChannel(TraceChannel=Visibility) → Branch(ReturnValue=true) → BreakHitResult → Check HitActor: IsValid(HitActor) → Branch → True: interact with HitActor. Check ground: use ImpactPoint as the world position clicked. GetHitResultUnderCursorByChannel is on PlayerController. Inputs: 'TraceChannel' (ETraceTypeQuery) and 'bTraceComplex' (bool). Output: 'HitResult' (struct) and 'ReturnValue' (bool). Use BreakHitResult to get ImpactPoint, HitActor, etc.

SetActorTickEnabled — enable or disable Tick for this actor

EventActorEndOverlap — fires when overlap ends

StopMontage — stop a currently playing AnimMontage