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

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.

EventHit — fires when actor is hit by or hits something

Requires Simulation Generates Hit Events on physics body.

Hit

A blocking collision between two shapes. Fires OnHit on both actors. Use for solid impacts.

OnHit

Fires when a physics collision happens. Use for impact effects, damage on contact.

EventAnyDamage — receive any type of damage

BreakHitResult — decompose hit result structure into components

UGameplayStatics::BreakHitResult. Most important outputs: bBlockingHit, ImpactPoint, ImpactNormal, HitActor, HitComponent.

ForEachLoopWithBreak — iterate with ability to break early

LaunchCharacter — apply a velocity impulse to a Character

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

Event AnyDamage — fires when this actor receives damage