Launch Pad Challenge: C++/Blueprints

.h

UPROPERTY(VisibleAnywhere, Category = "Components")
UStaticMeshComponent* MeshComp;

UPROPERTY(VisibleAnywhere, Category = "Components")
UBoxComponent* OverlapComp;

// Marked with ufunction to bind to overlap event
UFUNCTION()
void OverlapLaunchPad(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

/* Total impulse added to the character on overlap
Marked 'EditInstanceOnly' to allow in-level editing of this property per instance. */
UPROPERTY(EditInstanceOnly, Category = "LaunchPad")
float LaunchStrength;

/* Angle added on top of actor rotation to launch the character.
Marked 'EditInstanceOnly' to allow in-level editing of this property per instance. */
UPROPERTY(EditInstanceOnly, Category = "LaunchPad")
float LaunchPitchAngle;

/* Effect to play when activating launch pad */
UPROPERTY(EditDefaultsOnly, Category = "LaunchPad")
UParticleSystem* ActivateLaunchPadEffect;

.cpp

// Sets default values
ALaunchPad::ALaunchPad()
{
  OverlapComp = CreateDefaultSubobject<UBoxComponent>(TEXT("OverlapComp"));
  OverlapComp->SetBoxExtent(FVector(75, 75, 50));
  RootComponent = OverlapComp;

  MeshComp = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("MeshComp"));
  MeshComp->SetupAttachment(RootComponent);

  // Bind to Event
  OverlapComp->OnComponentBeginOverlap.AddDynamic(this, &ALaunchPad::OverlapLaunchPad);

  LaunchStrength = 1500;
  LaunchPitchAngle = 35.0f;
}

void ALaunchPad::OverlapLaunchPad(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
  // Make rotator with our specified 'pitch' and convert to a direction vector * intensity
  FRotator LaunchDirection = GetActorRotation();
  LaunchDirection.Pitch += LaunchPitchAngle;
  FVector LaunchVelocity = LaunchDirection.Vector() * LaunchStrength;

  ACharacter* OtherCharacter = Cast<ACharacter>(OtherActor);
  if (OtherCharacter)
  {
    // Launch Player! Both booleans give consistent launch velocity by ignoring the current player velocity
    OtherCharacter->LaunchCharacter(LaunchVelocity, true, true);

    // Spawn FX
    UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ActivateLaunchPadEffect, GetActorLocation());
  }
  // Did not overlap a player, so check if it's a physics simulating actor we can launch
  else if (OtherComp && OtherComp->IsSimulatingPhysics())
  {
    OtherComp->AddImpulse(LaunchVelocity, NAME_None, true);

    // Spawn FX
    UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ActivateLaunchPadEffect, GetActorLocation());
  }
}