Two types API to modify Actor’s parameters before BeginPlay

1st way:

FTransform SpawnTransform(SpawnRot, SpawnLoc);
AMyCharacter* Character = world->SpawnActorDeferred<AMyCharacter>(ActorClass, SpawnTransform);
if (Character)
{
    Character->SetupFunction(... params ...);
    Character->FinishSpawning(SpawnTransform);
}

2nd way:

FTransform SpawnTransform(SpawnRot, SpawnLoc);
AMyCharacter* Character = Cast<AMyCharacter>(UGameplayStatics::BeginDeferredActorSpawnFromClass(this, DeferredActorClass, SpawnTransform));
if (Character != nullptr)
{
    Character->SetupFunction(... params ...);
    UGameplayStatics::FinishSpawningActor(Character, SpawnTransform);
}

These two ways are verified in v4.21:

  • SpawnActor would trigger both Constructor and BeginPlay;
  • SpawnActorDeferred would trigger Constructor only;
  • BeginPlay would be triggered after FinishSpawning;
  • There’s no way to spawn actor before Constructor.

If there any other ways to pass arguments to the Constructor of Actor? An informal way is:
define static variables, set values of these variables before SpawnActor, then use these variables in the Constructor.


从前的艺术家的风格,都是徐徐徐徐形成的,自然发育,有点受日月之精华的样子。地球大,人口少,光阴慢,物质和精神整个儿松松宽宽潇潇洒洒,所以:人格即风格。──木心