Health and damage system with ApplyDamage and EventAnyDamage

Dealing damage: Event → ApplyDamage(TargetActor, BaseDamage, InstigatorController, DamageCauser, DamageTypeClass). Receiving: EventAnyDamage → Damage output → Subtract_FloatFloat(CurrentHealth, Damage) → FClamp(Result, 0, MaxHealth) → SET CurrentHealth → Branch(CurrentHealth <= 0) → True: DestroyActor. Initialize CurrentHealth=MaxHealth in BeginPlay.

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.

ApplyRadialDamage — apply damage to all actors within a radius

Physics Body

A SceneComponent with simulate-physics enabled. Driven by forces, gravity, collisions instead of explicit transforms.

Spawn system with wave management for enemies

Pattern: Variables CurrentWave(int)=0, EnemiesAlive(int)=0, EnemiesPerWave(Array<int>). StartWave: CurrentWave++ → SET EnemiesAlive=EnemiesPerWave[CurrentWave]. Timer looping: Branch(SpawnedThisWave < EnemiesPerWave[CurrentWave]) → SpawnActor(EnemyClass, RandomSpawnPoint) → SpawnedThisWave++. OnEnemyDeath: EnemiesAlive-- → Branch(EnemiesAlive <= 0) → StartNextWave or Victory.

Power — raise base to exponent power

Internal function name is MultiplyMultiply_FloatFloat (operator **).

PlayMontage — play an AnimMontage on a SkeletalMeshComponent

Call on the SkeletalMeshComponent. Get it via GetMesh() on Character. Returns montage length. Exec out is 'then'.

Object pooling pattern for frequently spawned actors like projectiles

Pattern: PoolManager with Array<AActor*> AvailablePool. Init: loop SpawnActor N times → SetActorHiddenInGame(true) → SetActorEnableCollision(false) → Array_Add to pool. GetFromPool: Array_Length > 0 → remove last → SetHidden(false) → SetCollision(true) → SetActorLocation → return. ReturnToPool: SetHidden(true) → SetCollision(false) → Array_Add back.

Level

A scene containing actors, lighting, geometry. Open a level via Open Level. Sublevels stream in/out.

string

string