EventHit — fires when actor is hit by or hits something

Requires Simulation Generates Hit Events on physics body.

Hit

A blocking collision between two shapes. Fires OnHit on both actors. Use for solid impacts.

Collision

Geometry used for hit-tests and physics. Often simpler than the visual mesh for performance.

OnComponentHit — hit event on specific component

BreakHitResult — decompose hit result structure into components

UGameplayStatics::BreakHitResult. Most important outputs: bBlockingHit, ImpactPoint, ImpactNormal, HitActor, HitComponent.

ApplyPointDamage — deal point damage with hit info

Melee attack with sphere trace and damage in front of character

Pattern: Attack input → Branch(bCanAttack) → PlayMontage(AttackMontage) → SET bCanAttack=false. AnimNotify during montage: GetActorLocation + GetActorForwardVector*AttackRange → SphereTraceMulti(Loc, Loc+Forward*Range, AttackRadius) → ForEach hit: Branch(HitActor != Self AND not already hit) → ApplyDamage(HitActor, Damage). OnMontageEnded → SET bCanAttack=true.

BreakHitResult — split a HitResult struct into individual fields

Pure node. HitActor is the actor that was hit — cast it to use its interface.

EventPointDamage — receive point damage with hit info

Niagara particle effect at impact point from line trace

Pattern: LineTraceByChannel → Branch(hit=true) → BreakHitResult → SpawnSystemAtLocation(SystemTemplate=NS_Impact, Location=ImpactPoint, Rotation=MakeRotFromX(ImpactNormal), Scale=(1,1,1), bAutoDestroy=true). Use MakeRotFromX with ImpactNormal to orient effect to surface normal. NS_ prefix is convention for Niagara Systems. SpawnSystemAtLocation is in UNiagaraFunctionLibrary. bAutoDestroy=true means the component cleans itself up after the effect completes.