How to create a PointLight at runtime use C++?

Development Rendering
, , , , ,
1

I have tried several way to create PointLight use C++, but they all don’t work.

1,

APointLight* PL = NewObject<APointLight>();
if (PL)
{
	PL->AttachToActor(SelectedHero, FAttachmentTransformRules::KeepRelativeTransform);
	//FVector Loc = SelectedHero->GetActorLocation();// FRotator(90.f, 0.f, 0.f).Vector() * 1000.f;

	PL->SetActorRelativeLocation(FVector(0.f, 0.f, 1000.f));
	ULightComponent* LC = PL->GetLightComponent();
	if (LC)
	{
		LC->SetCastShadows(false);
		LC->InverseSquaredFalloff_DEPRECATED = false;
		LC->SetIntensity(20000.f);
		LC->SetLightColor(FLinearColor(199, 125, 108));
		PL->PointLightComponent->AttenuationRadius = 10000.f;
	}
}

2,

UPointLightComponent* PLC = NewObject<UPointLightComponent>();
//GetWorld()->SpawnActor<UPointLightComponent>(UPointLightComponent::StaticClass(), Loc, FRotator(0.f, 0.f, 0.f));
//PLC->AttachTo(SelectedHero->GetMesh());
//PLC->RegisterComponent();

PLC->SetWorldLocation(FVector(1200.f, 1200.f, 500.f));
//PLC->SetRelativeLocation(FVector(0.f, 0.f, 1200.f));

PLC->SetCastShadows(false);
PLC->bUseInverseSquaredFalloff = false;
PLC->SetIntensity(20000.f);
PLC->SetLightColor(FLinearColor(199, 125, 108));
PLC->SetAttenuationRadius(10000.f);

How to achieve this?

2

Hey-

What class are you trying to spawn your light from? I was able to use the following code in my actor class constructor:

MyLight = CreateDefaultSubobject<UPointLightComponent>(TEXT("MyLight"));
	RootComponent = MyLight;

Then in the editor when I created a blueprint based on this class, the point light was already a part of the hierarchy and appeared when the blueprint instance is placed in the level. Let me know if doing this works for you.

Cheers

3

Thx very much for your help! I found the reason, blueprint is need to be created, I thought PointLight can be create without blueprint at runtime.