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'.

Vertical Box

Lays out children top-to-bottom. Children's Size pins control how space is distributed.

Vector

A 3D point or direction (X, Y, Z). Used for positions, directions, scales. Z is up by default in UE.

string

string

Dash or dodge movement with cooldown using timeline

Pattern: Variables bCanDash(bool)=true, DashDistance(float)=1000, DashDuration(float)=0.2. Input → Branch(bCanDash) → SET bCanDash=false → GetActorForwardVector → Multiply(Forward, DashDistance) → Timeline(0→1 over DashDuration) → Update: VLerp(StartLoc, StartLoc+DashOffset, Alpha) → SetActorLocation. Finished → Delay(CooldownTime) → SET bCanDash=true.

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).

Horizontal Box

Lays out children left-to-right. Same Size pin model as Vertical Box.

SetWorldLocation on component — set component world position

K2_SetWorldLocation. USceneComponent method.

SetWorldRotation on component — set component world rotation

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.