LaunchCharacter — launch character with velocity

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

LaunchCharacter — apply a velocity impulse to a Character

bXYOverride/bZOverride: if true, replaces current velocity. If false, adds to it.

Enable physics ragdoll and apply explosion impulse

Pattern: OnDeath → GetMesh → SetSimulatePhysics(bSimulate=true) → AddImpulse(Impulse=MakeVector(X=0,Y=0,Z=500), bVelChange=true). For explosion: GetMesh → AddRadialImpulse(Origin=ExplosionLocation, Radius=500, Strength=1000, Falloff=RIF_Linear, bVelChange=false). Key: Always call SetSimulatePhysics BEFORE AddImpulse. AddImpulse input 'bVelChange=true' for direct velocity (ignores mass). AddRadialImpulse is on PrimitiveComponent.

Create a Blueprint for a projectile that moves forward, bounces off walls, and explodes after 3 seconds

Spawn projectile from socket location facing forward

Pattern: InputAction Fire → GetMesh → GetSocketTransform(InSocketName='MuzzleSocket') → BreakTransform(outputs Location, Rotation) → MakeTransform(Location=SocketLocation, Rotation=SocketRotation) → SpawnActorFromClass(Class=BP_Projectile, SpawnTransform=Transform). Key: GetSocketTransform must be called on the SkeletalMeshComponent (GetMesh()), not the actor. Use 'World' TransformSpace. SpawnActorFromClass takes a full Transform, not separate Location/Rotation.

Event BeginPlay — fires once when actor is spawned or game starts

BeginPlay

Fires once on actor spawn (after construction). Use for setup that needs other actors in the world to exist.

AddImpulse — apply instant impulse to physics body

One-shot force. bVelChange=true treats Impulse as velocity change.

EnhancedInputAction — Enhanced Input system action event

K2Node_EnhancedInputAction. ActionValue type depends on InputAction (Bool, Float, Axis2D, Axis3D). Triggers: Started, Ongoing, Triggered, Completed, Canceled.

FindLookAtRotation — get rotation to look from Start toward Target