DeprojectScreenToWorld — convert 2D screen position to 3D world ray

Pure node. WorldDirection is the ray direction — multiply by large number and add WorldLocation to get the trace end point for mouse-to-world ray casting.

DeprojectScreenPositionToWorld — convert 2D screen coords to 3D world ray

APlayerController method. WorldDirection is the ray direction for line traces.

LineTraceSingle — raycast single hit by channel

UKismetSystemLibrary::LineTraceSingle. WorldContextObject is hidden. End pin is world position, not direction.

LineTraceByChannel — raycast along a line and return first hit

TraceChannel: ETraceTypeQuery::TraceTypeQuery1=Visibility, TraceTypeQuery2=Camera. DrawDebugType: None/ForOneFrame/ForDuration/Persistent.

Line trace raycast for interaction system

Pattern: Input trigger → LineTraceSingle(CameraLocation, CameraLocation + ForwardVector * Distance, Visibility, false, MakeArray(Self), None) → Branch(ReturnValue) → True: BreakHitResult → HitActor → CastTo InteractableInterface → call Interact. End pin is world POSITION not direction. Use DrawDebugType ForOneFrame during dev.

string

string

LineTraceMulti — raycast returning multiple hits

Create a Blueprint for a simple FPS weapon that shoots raycasts and deals damage

RandomUnitVector — random direction unit vector

Rotator

A 3D rotation (Pitch, Yaw, Roll) in degrees. Combine with Vector for full positioning.