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).

string

string

Camera orbit turntable with spring arm for product viewer

Setup: SceneComponent(root) → SpringArmComponent(child) → CameraComponent(child). SpringArm: UsePawnControlRotation=false, TargetArmLength=500. Orbit: InputAxis MouseX → MakeRotator(0,0,Value*Sensitivity) → AddRelativeRotation(SpringArm). Zoom: MouseWheel → GetTargetArmLength → Subtract(Current, Axis*Step) → FClamp(Min,Max) → SetTargetArmLength.

Set (Collection)

An unordered collection with unique elements. (The Set node for writing variables is a separate concept — see the entry for 'Set'.)

Less (float) — A < B

Pickup and collectible system with overlap trigger

Pattern: Pickup actor with SphereCollision(overlap), StaticMesh visual. OnComponentBeginOverlap → CastTo PlayerCharacter → Success: call AddScore/AddItem interface on player → PlaySoundAtLocation → SpawnEmitterAtLocation → DestroyActor(self). Set collision to OverlapOnlyPawn for performance.

CreateDynamicMaterialInstance — create runtime modifiable material

UPrimitiveComponent method. Store result in variable and reuse. Create once in BeginPlay.

LaunchCharacter — launch character with velocity

ACharacter::LaunchCharacter. Good for knockback, bouncing, jumppads.

SetScalarParameterValue — set a float parameter on a dynamic material

ParameterName must match the parameter name in the Material exactly (case-sensitive).

SetMaterial — change material on mesh component at index